Wide temperature range environmental test chamber

Abstract

The utility model relates to test box technical field, concretely relates to a wide temperature change range environment test box, including a test box, heating system, refrigerating system and air exchange mouth control circuit, test box is equipped with the test area and the placement area that are linked together in, heating system is in the test area and is used for heating temperature control to the test area, refrigerating system is in the placement area and has the refrigeration air outlet and refrigeration air inlet towards the test area, and refrigerating system includes evaporimeter, and refrigerating system is used for through evaporimeter and is cooled to the test area and is carried out air circulation temperature control through refrigeration air outlet and refrigeration air inlet, test box is equipped with the partition baffle that is spaced apart with refrigerating system in, and the partition baffle is used for sealing isolation of test area and placement area, is equipped with the air exchange mouth of being able to electric control adjustment opening and closing size on the partition baffle, and air exchange mouth control circuit includes a temperature sensor for gathering the real -time temperature of placement area or test area.

Description

Technical Field

[0001] This utility model relates to the field of test chamber technology, specifically to a high and low temperature environment test chamber with a wide temperature variation range. Background Technology

[0002] In modern industrial production and scientific research, the requirements for performance testing of products and materials are becoming increasingly stringent. Among these, high and low temperature alternating tests, as a crucial means of evaluating the stability and reliability of products and materials under different temperature environments, are widely used in many fields such as electronics, automotive, aerospace, and chemical engineering. This places higher demands on the performance of environmental test chambers, especially their performance in the high-temperature range.

[0003] While existing conventional environmental test chambers can meet most routine testing requirements, their temperature range is typically limited to -70℃ to +150℃. This limitation mainly stems from the evaporator in their refrigeration system. In conventional environmental test chambers, the refrigerant inside the evaporator absorbs heat to achieve cooling at low temperatures. However, when the ambient temperature exceeds 150℃, the refrigerant is prone to carbonization due to its inherent chemical properties, which may damage the evaporator.

[0004] The limitations of conventional environmental test chambers in high-temperature performance prevent many products and materials requiring alternating high and low temperature tests exceeding 150°C from being accurately and effectively tested and evaluated. This not only restricts technological research and development and product innovation in related fields but also, to some extent, hinders industrial development and upgrading.

[0005] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0006] The purpose of this invention is to provide a wide temperature range environmental test chamber.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A wide temperature range environmental test chamber includes a test chamber body, a heating system, a refrigeration system and an air exchange control circuit; The test chamber contains a connected test area and a placement area; The heating system is located in the test area and is used to heat and control the temperature of the test area; The refrigeration system is located in the placement area and has a refrigeration air outlet and a refrigeration air inlet facing the test area. The refrigeration system includes an evaporator and is used to circulate and refrigerate the test area through the evaporator and via the refrigeration air outlet and the refrigeration air inlet to control the temperature. The test chamber is equipped with a partition baffle that is spaced apart from the refrigeration system. The partition baffle is used to seal and isolate the test area from the placement area. The partition baffle is equipped with an inlet and outlet air exchange port that can be electrically controlled to adjust its opening and closing size. The ventilation port control circuit includes a temperature sensor for collecting the real-time temperature of the placement area or the test area, and adjusts the opening and closing size of the inlet and outlet ventilation ports based on the temperature changes collected by the temperature sensor. When the refrigeration system is working, an internal circulation air duct is formed in the placement area and an external circulation air duct is formed in the test area. The internal circulation air duct enters the test area through the inlet and outlet air exchange ports.

[0008] The refrigerant in the evaporator is the existing configuration and will not be described in detail here.

[0009] Understandably, "sealed isolation" means complete separation.

[0010] For ease of explanation and understanding, the temperature range of existing test chambers is -70℃ to 150℃, while the temperature range of this application is -70℃ to 350℃. The actual range can be adjusted according to specific circumstances.

[0011] During the heating process, the heating system gradually raises the temperature in the test area to 350℃. The partition completely separates the test area from the placement area. Under the cooling effect of the evaporator, the temperature in the placement area is prevented from rising above 150℃, thereby preventing the refrigerant in the evaporator from carbonizing and protecting the evaporator.

[0012] During the cooling process, on the one hand, the heating system stops heating and the temperature in the test area drops slowly. On the other hand, the air inlet and outlet are initially kept at a small opening to allow cold air from the placement area to enter the test area and accelerate the temperature drop. When the temperature in the test area drops to below 150°C, the air inlet and outlet are switched to the maximum opening to further accelerate the temperature drop, eventually reducing the temperature in the test area to -70°C.

[0013] The above settings protect the evaporator while expanding the temperature range of the test chamber, making the test chamber more practical, effective, and applicable.

[0014] It should be added that existing technologies require the use of both a test chamber and a high-temperature chamber to achieve temperature changes from -70℃ to 350℃. This application only requires the use of a test chamber, which has low structural cost and does not require replacing equipment to re-clamp the specimen, saving time and labor costs, and also filling a market gap.

[0015] In some implementations, the space of the placement area is smaller than that of the test area to avoid affecting the use of the test chamber when the placement area is used independently.

[0016] In a further embodiment, the partition includes a first partition and two second partitions, wherein the first partition is fixedly disposed inside the test chamber. Along the vertical direction, the two second baffles are respectively movably connected to the two ends of the first baffle, thereby forming the air inlet and outlet at the upper and lower ends of the first baffle.

[0017] It should be noted that the structural support is a basic requirement, and this should be known even if it is not explicitly stated. Taking the first baffle as an example, even if the support method of the first baffle is not explicitly stated, it should be known that it can be supported by means such as threaded connection with the test chamber.

[0018] The first baffle remains stationary. Taking the second baffle as an example, when the second baffle is in the first predetermined position, the placement area and the test area are completely separated; when the second baffle is in the second predetermined position, the placement area and the test area are initially connected; and when the second baffle is in the third predetermined position, the placement area and the test area are further connected.

[0019] This application provides further specific settings for the partition baffle. During the operation of the partition baffle, only the second baffle needs to be adjusted, reducing the difficulty of operation and improving the operation progress. Since the first baffle remains stationary, the connection between the placement area and the test area is kept low, preventing the temperature in the placement area from rising rapidly due to the hot air in the test area, thus protecting the evaporator.

[0020] In some implementations, the size of the first baffle is larger than the sum of the sizes of the two second baffles in the vertical direction, so as to further ensure that the connection between the placement area and the test area is not high.

[0021] It should be noted that the drive and control of the structure are conventional settings, and the structure in this application can utilize existing drive and control devices. For example, the evaporator can be controlled by an existing controller. As another example, the second baffle can be driven by an existing electric slide or other drive structure; the specific drive method is existing and known to those skilled in the art, and will not be elaborated upon here.

[0022] In a further embodiment, the edge region of the first baffle is elastic; And / or, the edge region of the second baffle is elastic.

[0023] There are no restrictions on the extent of the edge area.

[0024] The flexible edge design allows the first baffle to engage with the test chamber, facilitating installation and disassembly. The flexible edge of the second baffle ensures a sealed isolation between the test area and the placement area.

[0025] For example, the edge area of ​​the first baffle can be made of materials such as rubber; the area outside the edge area of ​​the first baffle can be made of materials such as polystyrene foam board, or the interior of the area outside the edge area of ​​the first baffle can be filled with materials such as aerogel to form a heat insulation layer.

[0026] In a further embodiment, the refrigeration system also includes a refrigeration box, a first motor, a first impeller, and a first volute. The first volute is provided with a cooling air outlet that communicates with the placement area; The inner space of the first volute is connected to the inner space of the refrigeration box; The first impeller is disposed inside the first volute and connected to the first motor; The refrigeration box is provided with a refrigeration air inlet that communicates with the placement area; The evaporator is located inside the refrigeration box.

[0027] Understandably, these structures, such as the refrigeration unit, are located in the placement area.

[0028] The refrigeration process of the refrigeration system is as follows: The first motor drives the first impeller to rotate in the first volute, which promotes the air in the placement area to enter the refrigeration box through the refrigeration air inlet and be output through the refrigeration air outlet. During this process, the refrigerant in the evaporator exchanges heat with the gas entering the refrigeration box to achieve the purpose of cooling.

[0029] Taking the first motor as an example, other structures can be described with reference to this description. The position of the first motor can be adjusted according to the actual situation. In some embodiments, the first motor may be located on top of the refrigeration unit. The first motor may be configured as a variable frequency motor.

[0030] Taking the cooling air outlet as an example, other similar structures can be described in the same way. The first volute can be provided with several vent holes, which together form the cooling air outlet.

[0031] This application clarifies the specific structure of the refrigeration system, achieving refrigeration based on a simple structure, and further ensuring that the environmental chamber has a low cost.

[0032] In a further embodiment, the heating system includes a heating box, a second motor, a second impeller, a second volute, and a heater; The second volute is provided with a heated air outlet that communicates with the test area; The inner space of the second volute is connected to the inner space of the heating box; The second impeller is disposed inside the second volute and connected to the second motor; The heating chamber is equipped with a heating air inlet that communicates with the test area; The heater is located inside the heating chamber.

[0033] The heating process of the heating system is as follows: The second motor drives the second impeller to rotate in the second volute, promoting the air in the test area to enter the heating chamber through the heating air inlet and be output through the heating air outlet. During this process, the gas entering the heating chamber is heated by the heater to achieve the purpose of raising the temperature. In some embodiments, the heater consists of heating wires.

[0034] This application clarifies the specific structure of the heating system, achieving heating based on a simple structure, and further ensuring that the environmental chamber has a low cost.

[0035] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0036] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0037] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0038] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0039] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0040] The working principle and advantages of this utility model are as follows: During the heating process, the heating system gradually raises the temperature in the test area to 350℃. The partition completely separates the test area from the placement area. Under the cooling effect of the evaporator, the temperature in the placement area is prevented from rising above 150℃, thereby preventing the refrigerant in the evaporator from carbonizing and protecting the evaporator.

[0041] During the cooling process, on the one hand, the heating system stops heating, and the temperature in the test area slowly decreases. On the other hand, the air inlet and outlet are initially kept at a small opening (e.g., 10%) to allow cold air from the placement area to enter the test area and accelerate the temperature drop. When the temperature in the test area drops to below 150°C, the air inlet and outlet are switched to the maximum opening to further accelerate the temperature drop, ultimately causing the temperature in the test area to drop to -70°C.

[0042] The above settings protect the evaporator while expanding the temperature range of the test chamber, making the test chamber more practical and applicable to a wider range of situations.

[0043] In summary, the test chamber in this application enables products and materials that require high and low temperature alternating tests exceeding 150°C to be accurately and effectively tested and evaluated, ensuring technological research and development and product innovation in related fields, and promoting industrial development and upgrading. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of the wide temperature range environmental test chamber according to an embodiment of the present invention; Figure 2 This is a top view of the wide temperature range environmental test chamber according to an embodiment of this utility model; Figure 3 This is one of the cross-sectional views (line AA) of the wide temperature range environmental test chamber of this utility model embodiment; Figure 4 This is the second cross-sectional view (BB line) of the wide temperature range environmental test chamber of this utility model embodiment. Figure 5 This is a schematic diagram of the cooperation structure between the partition baffle and a corresponding driving structure in an embodiment of the present invention; Figure 6 for Figure 5 A structural diagram from another perspective.

[0045] In the attached diagrams above: 1. Test chamber; 11. Test area; 12. Placement area; 2. Refrigeration system; 21. Refrigeration air outlet; 22. Refrigeration air inlet; 23. Evaporator; 24. Refrigeration box; 25. First motor; 26. First impeller; 27. First volute; 3. Heating system; 31. Heating box; 32. Second motor; 33. Second impeller; 34. Second volute; 35. Heater; 36. Heating air outlet; 37. Heating air inlet; 4. Dividing baffle; 41. Air inlet / outlet; 42. First baffle; 43. Second baffle; 5. Temperature sensor. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0047] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0048] See Figures 1-6 A wide temperature range environmental test chamber includes a test chamber body 1, a refrigeration system 2, a heating system 3, and an air exchange control circuit; The test chamber 1 is provided with a test area 11 and a placement area 12 that are connected to each other; The heating system 3 is located in the test area 11 and is used to heat and control the temperature of the test area 11; The refrigeration system 2 is located in the placement area 12 and has a refrigeration air outlet 21 and a refrigeration air inlet 22 facing the test area 11. The refrigeration system 2 includes an evaporator 23. The refrigeration system 2 is used to circulate and refrigerate the test area 11 through the evaporator 23 and through the refrigeration air outlet 21 and the refrigeration air inlet 22 to control the temperature. The test chamber 1 is provided with a partition baffle 4 that is spaced apart from the refrigeration system 2. The partition baffle 4 is used to seal and isolate the test area 11 from the placement area 12. The partition baffle 4 is provided with an inlet and outlet air exchange port 41 that can be electrically controlled to adjust the opening and closing size. The ventilation port control circuit includes a temperature sensor 5 for collecting the real-time temperature of the placement area 12 or the test area 11, and adjusts the opening and closing size of the inlet and outlet ventilation port 41 based on the temperature change collected by the temperature sensor 5. When the refrigeration system 2 is working, an internal circulation air duct is formed in the placement area 12, and an external circulation air duct is formed in the test area 11. The internal circulation air duct enters the test area 11 through the inlet and outlet air exchange port 41.

[0049] The refrigerant in evaporator 23 is the existing setting and will not be described in detail here.

[0050] Understandably, "sealed isolation" means complete separation.

[0051] The test chamber 1 may be equipped with a heat dissipation port that communicates with the test area 11.

[0052] The coordination between temperature sensor 5 and the corresponding control circuit is existing and will not be described in detail here.

[0053] For ease of explanation and understanding, the temperature range of the existing test chamber is -70℃ to 150℃, and the temperature range of this embodiment is -70℃ to 350℃. The actual situation can be adjusted according to the specific circumstances.

[0054] During the heating process, the heating system 3 gradually raises the temperature in the test zone 11 to 350°C. The partition baffle 4 completely separates the test zone 11 and the placement zone 12. Under the cooling effect of the evaporator 23, the temperature in the placement zone 12 is prevented from rising above 150°C, thereby preventing the refrigerant in the evaporator 23 from carbonizing and protecting the evaporator 23.

[0055] During the cooling process, on the one hand, the heating system 3 stops heating, and the temperature in the test zone 11 slowly decreases. On the other hand, the inlet and outlet air exchange port 41 initially maintains a small opening, allowing the cold air in the placement area 12 to enter the test zone 11 to accelerate the temperature drop rate in the test zone 11. When the temperature in the test zone 11 drops to below 150°C, the inlet and outlet air exchange port 41 switches to the maximum opening to further accelerate the temperature drop rate in the test zone 11, ultimately causing the temperature in the test zone 11 to drop to -70°C.

[0056] The above settings protect the evaporator 23 while expanding the temperature variation range of the test chamber, making the test chamber more practical, effective, and applicable.

[0057] It should be added that existing technologies require the use of both a test chamber and a high-temperature chamber to achieve temperature changes from -70℃ to 350℃. This application only requires the use of a test chamber, which has low structural cost and does not require replacing equipment to re-clamp the specimen, saving time and labor costs, and also filling a market gap.

[0058] In some embodiments, the space (or size) of the placement area 12 is smaller than the space of the test area 11 to avoid affecting the use of the test chamber when the placement area 12 is used independently. For example, both the placement area 12 and the test area 11 are square, and the length and width of the placement area 12 are smaller than the length and width of the test area 11, respectively.

[0059] In summary, the test chamber in this embodiment enables products and materials that require high and low temperature alternating tests exceeding 150°C to be accurately and effectively tested and evaluated, ensuring technological research and development and product innovation in related fields, and promoting industrial development and upgrading.

[0060] In this embodiment, the partition baffle 4 includes a first baffle 42 and two second baffles 43. The first baffle 42 is fixedly disposed inside the test chamber 1. Vertically, the two second baffles 43 are movably connected to both ends of the first baffle 42 to form the air inlet / outlet ports 41 at both ends of the first baffle 42. It is understood that the opening degree of the air inlet / outlet ports 41 can be adjusted by adjusting the position of the second baffles 43.

[0061] It should be noted that the structural support is based on the setup, and should be known even if not explicitly stated. Taking the first baffle 42 as an example, even if the support method of the first baffle 42 is not explicitly stated, it should be known that it can be supported by means such as threaded connection with the test chamber 1.

[0062] The first baffle 42 remains stationary. Taking the second baffle 43 as an example, when the second baffle 43 is in the first predetermined position, the placement area 12 and the test area 11 are completely separated; when the second baffle 43 is in the second predetermined position, the placement area 12 and the test area 11 are initially connected; and when the second baffle 43 is in the third predetermined position, the placement area 12 and the test area 11 are further connected.

[0063] This embodiment further refines the design of the partition baffle 4. During the operation of the partition baffle 4, only the second baffle 43 needs to be adjusted, reducing operational difficulty and improving operational progress. Since the first baffle 42 remains stationary, the connection between the placement area 12 and the test area 11 is kept low, preventing the temperature in the placement area 12 from rising rapidly due to the hot air in the test area 11, thus protecting the evaporator 23.

[0064] In some embodiments, the size of the first baffle 42 is greater than the sum of the sizes of the two second baffles 43 in the vertical direction, so as to further ensure that the connection between the placement area 12 and the test area 11 is not high.

[0065] It should be noted that the drive and control of the structure are conventional settings, and the structure in this application can utilize existing drive and control devices. For example, the evaporator 23 can be controlled by an existing controller. As another example, the second baffle 43 can be driven by an existing electric slide or other drive structure; the specific drive method is existing and known to those skilled in the art, and will not be described in detail here. The second baffle 43 can be connected to a rotating shaft, and the rotating shaft is driven by a motor to achieve the rotation of the second baffle 43.

[0066] In this embodiment, the edge region of the first baffle 42 is elastic; And / or, the edge region of the second baffle 43 is elastic.

[0067] There are no restrictions on the extent of the edge area.

[0068] The elastic design of the edge area allows the first baffle 42 to engage with the test chamber 1, making installation and disassembly convenient. The elastic edge area of ​​the second baffle 43 ensures a sealed isolation between the test area 11 and the placement area 12.

[0069] For example, the edge area of ​​the first baffle 42 can be made of materials such as rubber; the area outside the edge area of ​​the first baffle 42 can be made of materials such as polystyrene foam board, or the interior of the area outside the edge area of ​​the first baffle 42 can be filled with materials such as aerogel to form a heat insulation layer.

[0070] The aforementioned partition baffle 4, including a first baffle 42 and two second baffles 43, is a preferred example. In practice, the partition baffle 4 and its inlet and outlet ventilation ports 41 can be designed as needed. For example, the partition baffle 4 can be a complete partition plate with two commonly used electrically controlled ventilation valves embedded on it. These electrically controlled ventilation valves serve as the inlet and outlet ventilation ports 41.

[0071] In this embodiment, the refrigeration system 2 further includes a refrigeration box 24, a first motor 25, a first impeller 26, and a first volute 27; The first volute 27 is provided with a cooling air outlet 21 that communicates with the placement area 12; The inner space of the first volute 27 is connected to the inner space of the refrigeration box 24; The first impeller 26 is disposed inside the first volute 27 and connected to the first motor 25; The refrigeration box 24 is provided with a refrigeration air inlet 22 that communicates with the placement area 12; The evaporator 23 is disposed inside the refrigeration box 24.

[0072] Understandably, these structures, such as the refrigeration box 24, are located in the placement area 12.

[0073] For example, the structural positions in this embodiment can be referred to in the attached drawings, such as the relative positions of the cooling air outlet 21 and the cooling air inlet 22.

[0074] The refrigeration process of the refrigeration system 2 is as follows: the first motor 25 drives the first impeller 26 to rotate in the first volute 27, which promotes the air in the placement area 12 to enter the refrigeration box 24 through the refrigeration air inlet 22 and be output through the refrigeration air outlet 21. During this period, the refrigerant in the evaporator 23 exchanges heat with the gas entering the refrigeration box 24 to achieve the purpose of cooling.

[0075] Taking the first motor 25 as an example, other structures can be described with reference to this description. The position of the first motor 25 can be adjusted according to the actual situation. In some embodiments, the first motor 25 may be located on top of the refrigeration box 24. The first motor 25 may be configured as a variable frequency motor.

[0076] Taking the cooling air outlet 21 as an example, other similar structures can be described with reference to this description. The first volute 27 can be provided with several ventilation holes, which together form the cooling air outlet 21.

[0077] The refrigeration system 2 also includes an outdoor unit such as a condenser, which is usually placed outside the test chamber and is not shown in the figure.

[0078] In this embodiment, the heating system 3 is specifically a hot air system, which includes a heating box 31, a second motor 32, a second impeller 33, a second volute 34, and a heater 35; The second volute 34 is provided with a heating air outlet 36 that communicates with the test area 11; The inner space of the second volute 34 is connected to the inner space of the heating box 31; The second impeller 33 is disposed inside the second volute 34 and connected to the second motor 32; The heating box 31 is provided with a heating air inlet 37 that communicates with the test area 11; The heater 35 is disposed inside the heating box 31.

[0079] The heating process of heating system 3 is as follows: the second motor 32 drives the second impeller 33 to rotate in the second volute 34, promoting the air in the test area 11 to enter the heating chamber 31 through the heating air inlet 37 and be output through the heating air outlet 36. During this process, the gas entering the heating chamber 31 is heated by the heater 35 to achieve the purpose of raising the temperature. In some embodiments, the heater 35 is composed of heating wires.

[0080] This embodiment clarifies the specific structure of the heating system 3, achieving heating based on a simple structure, and further ensuring that the cost of the environmental chamber is low.

[0081] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A wide temperature range environmental test chamber, characterized in that: It includes a test chamber (1), a refrigeration system (2), a heating system (3), and a ventilation control circuit; The test chamber (1) is provided with a test area (11) and a placement area (12) that are connected to each other. The heating system (3) is located in the test area (11) and is used to heat and control the temperature of the test area (11); The refrigeration system (2) is located in the placement area (12) and has a refrigeration outlet (21) and a refrigeration inlet (22) facing the test area (11). The refrigeration system (2) includes an evaporator (23) and is used to circulate and refrigerate the test area (11) through the evaporator (23) and through the refrigeration outlet (21) and the refrigeration inlet (22) to control the temperature. The test chamber (1) is provided with a partition baffle (4) spaced apart from the refrigeration system (2). The partition baffle (4) is used to seal and isolate the test area (11) from the placement area (12). The partition baffle (4) is provided with an inlet and outlet air exchange port (41) that can be electrically controlled to adjust the opening and closing size. The ventilation port control circuit includes a temperature sensor (5) for collecting the real-time temperature of the placement area (12) or the test area (11), and adjusts the opening and closing size of the inlet and outlet ventilation port (41) based on the temperature change collected by the temperature sensor (5). When the refrigeration system (2) is working, an internal circulation air duct is formed in the placement area (12) and an external circulation air duct is formed in the test area (11). The internal circulation air duct enters the test area (11) through the inlet and outlet air exchange port (41).

2. The wide temperature range environmental test chamber according to claim 1, characterized in that: The partition baffle (4) includes a first baffle (42) and two second baffles (43), wherein the first baffle (42) is fixedly installed inside the test chamber (1); Along the vertical direction, the two second baffles (43) are respectively movably connected to the two ends of the first baffle (42), thereby forming the air inlet and outlet (41) at the upper and lower ends of the first baffle (42).

3. The wide temperature range environmental test chamber according to claim 2, characterized in that: In the vertical direction, the size of the first baffle (42) is greater than the sum of the sizes of the two second baffles (43).

4. The wide temperature range environmental test chamber according to claim 2, characterized in that: The edge region of the first baffle (42) is elastic; And / or, the edge region of the second baffle (43) is elastic.

5. A wide temperature range environmental test chamber according to any one of claims 1-4, characterized in that: The refrigeration system (2) also includes a refrigeration box (24), a first motor (25), a first impeller (26) and a first volute (27); The first volute (27) is provided with a cooling air outlet (21) that communicates with the placement area (12); The inner space of the first volute (27) is connected to the inner space of the refrigeration box (24); The first impeller (26) is disposed inside the first volute (27) and connected to the first motor (25); The refrigeration box (24) is provided with a refrigeration air inlet (22) that communicates with the placement area (12); The evaporator (23) is located inside the refrigeration box (24).

6. A wide temperature range environmental test chamber according to any one of claims 1-4, characterized in that: The heating system (3) includes a heating box (31), a second motor (32), a second impeller (33), a second volute (34), and a heater (35). The second volute (34) is provided with a heating air outlet (36) that communicates with the test area (11). The inner space of the second volute (34) is connected to the inner space of the heating box (31); The second impeller (33) is disposed inside the second volute (34) and connected to the second motor (32); The heating box (31) is provided with a heating air inlet (37) that communicates with the test area (11). The heater (35) is located inside the heating box (31).

7. A wide temperature range environmental test chamber according to any one of claims 1-4, characterized in that: The size of the placement area (12) is smaller than the size of the test area (11).

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