Environmental test box

Abstract

The utility model belongs to the technical field of environmental test instruments, and discloses an environmental test chamber, which comprises an air-conditioning chamber, a test chamber, an air inlet pipe and a transition structure, and is characterized in that the air inlet pipe is used for communicating a first air outlet of the air-conditioning chamber with a first air inlet of the test chamber; the interior of the transition structure is hollow to form a mixing area and a transition area which are communicated, a second air inlet is formed in the end, away from the transition area, of the mixing area, the second air inlet is matched with and communicated with the first air outlet, and any sectional area, in the direction parallel to the second air inlet, of the mixing area is larger than the area of the second air inlet. The end, away from the mixing area, of the transition area is matched and communicated with the air inlet pipe, and the transition area is in conformal transition from the end connected with the mixing area to the other end. The mixing area can play a role in mixing and buffering, and the transition area can eliminate air flow dead angles and ensure air temperature and humidity balance, so that the uniformity of temperature and humidity in a test chamber is improved, temperature and humidity deviation is reduced, and test conditions are met.

Description

Technical Field

[0001] This utility model relates to the field of environmental testing instruments, and in particular to an environmental testing chamber. Background Technology

[0002] Environmental test chambers can simulate the temperature and humidity of natural environments, allowing for the testing and detection of the relevant performance of products, components, or materials in a simulated natural environment. A test chamber typically includes a control room, a refrigeration unit room, an air conditioning room, and a testing room. Due to limitations in test site layout, the control room, refrigeration unit room, and air conditioning room are usually integrated into a single structure, with a separate testing room. The air conditioning room and testing room are connected via ductwork to facilitate air supply and return.

[0003] The air-conditioned room is equipped with a fan for air supply. The fan includes a motor, impeller, and volute. The motor drives the impeller to rotate, thereby causing air to be output from the air outlet of the volute. Due to the difference in shape and size between the air outlet of the volute and the air duct, for example, the air outlet of the volute is usually square, while the air duct is usually circular. When the air duct and the air outlet of the fan are connected, there is a dead airflow at the connection point. The air in the dead air cannot participate in the air circulation and cannot fully participate in the mixing of temperature and humidity. In addition, there are certain differences in temperature and humidity in different parts of the airflow output by the fan. This results in poor uniformity and deviation of temperature and humidity in the test room, which cannot meet the test conditions.

[0004] Therefore, there is an urgent need to develop an environmental test chamber to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an environmental test chamber that can connect the first air outlet and the air inlet duct, eliminate dead airflow at the connection point, ensure the uniformity of temperature and humidity in the test chamber, reduce temperature and humidity deviations, and meet the test conditions.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An environmental test chamber includes an air-conditioned room, a test chamber, and an air inlet duct. The air-conditioned room is equipped with a fan for supplying air, and the fan casing has a first air outlet. The test chamber has a first air inlet. The air inlet duct connects the first air outlet and the first air inlet. The environmental test chamber also includes a transition structure. The transition structure is hollow inside, forming a connected mixing zone and a transition zone. A second air inlet is opened at the end of the mixing zone away from the transition zone. The second air inlet is adapted to and connected to the first air outlet, and any cross-sectional area of ​​the mixing zone along a direction parallel to the second air inlet is larger than the area of ​​the second air inlet. The end of the transition zone away from the mixing zone is adapted to and connected to the air inlet duct, and the transition zone transitions from the end connected to the mixing zone to the other end in a contoured manner.

[0008] Furthermore, a drain outlet is provided at the bottom of the mixing zone.

[0009] Furthermore, the mixing region and the transition region can be detachably connected.

[0010] Furthermore, the mixing zone is located in the air-conditioned room, and an openable door is provided on one side of the air-conditioned room. The transition zone is located on the door. When the door is closed, the transition zone is connected to the mixing zone. When the door is opened, the transition zone is separated from the mixing zone.

[0011] Furthermore, a first seal is provided between the mixing zone and the transition zone.

[0012] Furthermore, the opening area of ​​the mixing zone near the transition zone is larger than the opening area of ​​the transition zone near the mixing zone.

[0013] Furthermore, the door is provided with a connecting groove, the transition area is covered at the end of the connecting groove away from the air-conditioning room, and the end of the connecting groove near the air-conditioning room can communicate with the mixing area.

[0014] Furthermore, the transition zone is covered with an insulation layer.

[0015] Furthermore, the environmental test chamber also includes a control room with signal connection and a temperature and humidity control device. The temperature and humidity control device is used to adjust the temperature and humidity of the air in the air-conditioned room. Both the air-conditioned room and the test chamber are equipped with temperature sensors and humidity sensors, and both the temperature sensors and the humidity sensors are signal connected to the control room.

[0016] Furthermore, the environmental test chamber also includes a return air duct, and the air-conditioned chamber is also provided with a return air outlet, which is connected to the test chamber through the return air duct.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides an environmental test chamber, including an air-conditioning room, a test chamber, and an air inlet duct. The air-conditioning room is equipped with a fan for supplying air, and the fan casing has a first air outlet. The test chamber has a first air inlet, and the air inlet duct connects the first air outlet and the first air inlet. The environmental test chamber also includes a transition structure. The transition structure is hollow inside, forming a connected mixing zone and a transition zone. A second air inlet is opened at the end of the mixing zone away from the transition zone. The second air inlet is adapted to and connected to the first air outlet, and any cross-sectional area of ​​the mixing zone along the direction parallel to the second air inlet is larger than the area of ​​the second air inlet. The end of the transition zone away from the mixing zone is adapted to and connected to the air inlet duct, and the transition zone transitions from the end connected to the mixing zone to the other end in a conformal manner. The gas delivered by the fan through the first air outlet can be mixed in the mixing zone. The cross-sectional area of ​​the mixing zone along any direction parallel to the second air inlet is larger than the area of ​​the second air inlet, giving the mixing zone a large volume. This buffers the airflow, allowing sufficient space and time for the gas to mix evenly, ensuring that the temperature and humidity of the gas entering the transition zone are balanced. The mixing zone and the transition zone connect the first air outlet and the first air inlet. The transition zone follows a contour from one end connected to the mixing zone to the other, avoiding dead airflow between the mixing zone and the air inlet duct. This ensures that the gas along the entire transmission path can participate in circulation and fully participate in the mixing of temperature and humidity, thereby improving the uniformity of temperature and humidity in the test room, reducing temperature and humidity deviations, and meeting the test conditions. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the environmental test chamber of this utility model;

[0020] Figure 2 This is a front view of the environmental test chamber of this utility model;

[0021] Figure 3 yes Figure 2 Sectional view at point AA;

[0022] Figure 4 This is a schematic diagram of the internal structure of the air-conditioned room of this utility model;

[0023] Figure 5 This is a schematic diagram of the mixing zone and the volute of this utility model.

[0024] In the picture:

[0025] 1. Air-conditioned room;

[0026] 2. Fan; 3. Volute; 31. First air outlet;

[0027] 4. Transition structure; 41. Mixing zone; 42. Transition zone; 43. Second air inlet; 44. Drain outlet;

[0028] 5. Box door; 51. Connecting groove;

[0029] 6. Second sealing element;

[0030] 7. Return air vent. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] like Figures 1 to 5As shown, this embodiment provides an environmental test chamber, including an air-conditioning chamber 1, a test chamber, and an air inlet duct. The air-conditioning chamber 1 is equipped with a fan 2 for supplying air. The volute 3 of the fan 2 is equipped with a first air outlet 31. The test chamber is equipped with a first air inlet. The air inlet duct is used to connect the first air outlet 31 and the first air inlet. Since the shape and size of the first air outlet 31 and the first air inlet are different, for example, the first air outlet 31 of the volute 3 is usually square, while the air inlet duct is usually a circular pipe that matches the first air inlet. This results in a dead airflow at the junction of the air inlet duct and the first air outlet 31. In addition, the temperature and humidity of the airflow output by the fan 2 are uneven, which affects the uniformity and deviation of the temperature and humidity in the test chamber.

[0036] To solve the above problems, the environmental test chamber also includes a transition structure 4. The interior of the transition structure 4 is hollow, forming a connected mixing zone 41 and a transition zone 42. A second air inlet 43 is provided at the end of the mixing zone 41 away from the transition zone 42. The second air inlet 43 is adapted to and connected to the first air outlet 31. The cross-sectional area of ​​the mixing zone 41 along any direction parallel to the second air inlet 43 is larger than the area of ​​the second air inlet 43. The end of the transition zone 42 away from the mixing zone 41 is adapted to and connected to the air inlet duct. The transition zone 42 transitions from the end connected to the mixing zone 41 to the other end in a conformal manner. The gas delivered by the fan 2 through the first air outlet 31 can be mixed in the mixing zone 41. The cross-sectional area of ​​the mixing zone 41 along any direction parallel to the second air inlet 43 is larger than the area of ​​the second air inlet 43, giving the mixing zone 41 a large volume. This buffers the airflow, allowing sufficient space and time for the gas to mix evenly, thus ensuring that the temperature and humidity of the gas entering the transition zone 42 are balanced. The mixing zone 41 and the transition zone 42 connect the first air outlet 31 to the first air inlet. The transition zone 42 transitions from one end connected to the mixing zone 41 to the other, avoiding dead airflow between the mixing zone 41 and the air inlet duct. This ensures that the gas along the entire transmission path can participate in circulation and fully participate in the mixing of temperature and humidity, thereby improving the uniformity of temperature and humidity in the test room, reducing temperature and humidity deviations, and meeting the test conditions.

[0037] In this embodiment, to improve the space utilization rate within the air-conditioned room 1, the mixing zone 41 has a cubic structure. To reduce dead airflow angles in the gas flow path, a square opening is provided at the end of the mixing zone 41 furthest from the first air inlet, such as... Figure 1As shown, the transition zone 42 transitions from one end connected to the mixing zone 41 to the other end with a directional circular shape, making the inner wall of the transition zone 42 smooth, thereby eliminating dead airflow angles within the transition zone 42 and achieving a seamless connection between the mixing zone 41 and the air inlet duct. Optionally, the mixing zone 41 may, but is not limited to, adopt a cylindrical structure. Correspondingly, the diameter of the transition zone 42 gradually increases or decreases from one end connected to the mixing zone 41 to the other end to make the inner wall of the transition zone 42 smooth; this is not limited here.

[0038] like Figure 5 As shown, in this embodiment, the air-conditioned room 1 is equipped with two fans 2, each fan 2 having a volute 3, and two first air outlets 31 arranged side by side within the second air inlet 43. Optionally, the number of fans 2 can also be adapted to be one, three, or six, etc., and is not limited here.

[0039] Furthermore, such as Figure 3 and Figure 4 As shown, a drain outlet 44 is provided at the bottom of the mixing zone 41, and the condensate generated in the mixing zone 41 can be discharged in time through the drain outlet 44 to avoid affecting the humidity of the gas in the mixing zone 41.

[0040] In this embodiment, the mixing zone 41 and the transition zone 42 can be connected separately, which facilitates the maintenance or replacement of the transition structure 4 and helps to reduce the processing difficulty of the transition structure 4.

[0041] like Figures 1-3 As shown, the mixing zone 41 is located inside the air-conditioned chamber 1. An openable door 5 is provided on one side of the air-conditioned chamber 1, and a transition zone 42 is located on the door 5. When the door 5 is closed, the transition zone 42 is connected to the mixing zone 41; when the door 5 is open, the transition zone 42 is separated from the mixing zone 41. The mixing zone 41 is located inside the air-conditioned chamber 1, facilitating connection with the first air outlet 31 of the fan 2, which helps to make the environmental test chamber structure compact and reduces heat exchange between the gas and the outside environment. The openable door 5 facilitates maintenance of the interior of the air-conditioned chamber 1. The transition zone 42 is located on the door 5, and the connection and separation of the transition zone 42 and the mixing zone 41 are controlled by opening and closing the door 5, making operation simple and convenient.

[0042] Furthermore, a first seal is provided between the mixing zone 41 and the transition zone 42 to improve the sealing performance at the connection between the mixing zone 41 and the transition zone 42 and prevent gas leakage.

[0043] The area of ​​the opening at the end of the mixing zone 41 near the transition zone 42 is larger than the area of ​​the opening at the end of the transition zone 42 near the mixing zone 41, so as to facilitate the installation of the first seal at the end of the mixing zone 41 near the transition zone 42, thereby avoiding the first seal from obstructing the gas passage within the transition structure 4 and preventing the generation of airflow dead zones.

[0044] In addition, the transition zone 42 is covered with an insulation layer to reduce heat exchange between the transition zone 42 and the outside environment, and to avoid affecting the temperature and humidity of the gas.

[0045] Similarly, both the air-conditioned room 1 and the door 5 are equipped with insulation layers to reduce heat exchange between the air-conditioned room 1 and the outside.

[0046] The insulation layer may include, but is not limited to, asbestos or polyurethane, etc., which are not specified here.

[0047] Continue as Figure 3 As shown, since the door 5 has a certain thickness, the door 5 is also provided with a connecting groove 51. The transition area 42 is covered by the end of the connecting groove 51 away from the air-conditioning chamber 1. The end of the connecting groove 51 close to the air-conditioning chamber 1 can communicate with the mixing area 41. By setting the connecting groove 51 on the door 5 to connect the transition area 42 and the mixing area 41, it is beneficial to improve the sealing performance of the door 5, prevent the gas in the air-conditioning chamber 1 from overflowing, and reduce heat exchange.

[0048] To facilitate opening and closing the door 5, one side of the door 5 is hinged to the air conditioning compartment 1, and the other side is detachably connected to the air conditioning compartment 1 via a latch, making the connection between the door 5 and the air conditioning compartment 1 stable and easy to open and close.

[0049] like Figure 4 As shown, a second sealing element 6 is provided between the door 5 and the air-conditioning compartment 1 to improve the sealing performance between the door 5 and the air-conditioning compartment 1.

[0050] In addition, the environmental test chamber also includes a control room with signal connection and a temperature and humidity control device. The temperature and humidity control device is used to regulate the temperature and humidity of the gas in the air-conditioned chamber 1. Both the air-conditioned chamber 1 and the test chamber are equipped with temperature sensors and humidity sensors. The temperature and humidity sensors are connected to the control room for signal connection. The temperature and humidity of the gas in the air-conditioned chamber 1 and the test chamber are detected by the temperature and humidity sensors, and the temperature and humidity are converted into electrical signals and sent to the control room. The control room controls the temperature and humidity control device to regulate the temperature and humidity of the gas in the air-conditioned chamber 1 to ensure that the gas input into the test chamber can meet the experimental requirements.

[0051] Specifically, temperature and humidity control devices include refrigeration units, heaters, and humidifiers, etc. Their specific structures are existing technologies and are not limited here.

[0052] like Figure 1 As shown, the air conditioning chamber 1 is also equipped with a return air vent 7, which is connected to the test chamber through a return air duct to recover the gas in the test chamber. After the air conditioning chamber 1 regulates the temperature and humidity, the gas is then transported back to the test chamber, thus forming an air circulation between the air conditioning chamber 1 and the test chamber. This helps to reduce energy consumption and improve test efficiency. Specifically, for ease of layout and connection, the return air vent 7 is also located on the door 5.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An environmental test chamber, comprising an air-conditioning chamber (1), a test chamber, and an air inlet duct, wherein the air-conditioning chamber (1) is provided with a fan (2) for supplying air, the volute (3) of the fan (2) is provided with a first air outlet (31), the test chamber is provided with a first air inlet, and the air inlet duct is used to connect the first air outlet (31) and the first air inlet, characterized in that, The environmental test chamber also includes a transition structure (4), which is hollow inside to form a connected mixing zone (41) and a transition zone (42). A second air inlet (43) is provided at one end of the mixing zone (41) away from the transition zone (42). The second air inlet (43) is adapted to and connected to the first air outlet (31). Any cross-sectional area of ​​the mixing zone (41) along the direction parallel to the second air inlet (43) is larger than the area of ​​the second air inlet (43). The end of the transition zone (42) away from the mixing zone (41) is adapted to and connected to the air inlet duct. The transition zone (42) transitions from one end connected to the mixing zone (41) to the other end in a conformal manner.

2. The environmental test chamber according to claim 1, characterized in that, The bottom of the mixing zone (41) is provided with a drain outlet (44).

3. The environmental test chamber according to claim 1, characterized in that, The mixing zone (41) and the transition zone (42) can be detachably connected.

4. The environmental test chamber according to claim 3, characterized in that, The mixing zone (41) is located inside the air-conditioning room (1). An openable door (5) is provided on one side of the air-conditioning room (1). The transition zone (42) is located on the door (5). When the door (5) is closed, the transition zone (42) is connected to the mixing zone (41). When the door (5) is opened, the transition zone (42) is separated from the mixing zone (41).

5. The environmental test chamber according to claim 4, characterized in that, A first seal is provided between the mixing zone (41) and the transition zone (42).

6. The environmental test chamber according to claim 5, characterized in that, The opening area of ​​the mixing zone (41) near the end of the transition zone (42) is greater than the opening area of ​​the transition zone (42) near the end of the mixing zone (41).

7. The environmental test chamber according to claim 4, characterized in that, The door (5) is provided with a connecting groove (51), and the transition area (42) is covered at the end of the connecting groove (51) away from the air-conditioning room (1). The end of the connecting groove (51) near the air-conditioning room (1) can communicate with the mixing area (41).

8. The environmental test chamber according to any one of claims 3 to 7, characterized in that, The transition zone (42) is covered with an insulation layer.

9. The environmental test chamber according to any one of claims 1 to 7, characterized in that, The environmental test chamber also includes a control room with signal connection and a temperature and humidity control device. The temperature and humidity control device is used to adjust the temperature and humidity of the gas in the air-conditioning room (1). Both the air-conditioning room (1) and the test chamber are equipped with temperature sensors and humidity sensors. Both the temperature sensors and the humidity sensors are signal connected to the control room.

10. The environmental test chamber according to any one of claims 1 to 7, characterized in that, The environmental test chamber also includes a return air duct, and the air-conditioned room (1) is also provided with a return air inlet (7), which is connected to the test chamber through the return air duct.

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