Pressure equalization device and environmental test chamber

Abstract

The present application belongs to the technical field of environmental test chamber, and discloses a pressure balancing device and an environmental test chamber. The environmental test chamber comprises the pressure balancing device. The pressure balancing device comprises a balancing box, a first plugging assembly, a second plugging assembly and a pipeline assembly. The side wall of the balancing box is provided with an air inlet and an air outlet. The first plugging assembly comprises a first elastic sheet. The first elastic sheet is arranged on the inner side of the balancing box with the air inlet. The first elastic sheet is used for plugging or opening the air inlet. The second plugging assembly comprises a second elastic sheet. The second elastic sheet is arranged on the outer side of the balancing box with the air outlet. The second elastic sheet is used for plugging or opening the air outlet. One end of the pipeline assembly is communicated with the balancing box. The other end of the pipeline assembly is used for communicating with the air conditioner chamber of the environmental test chamber. The top wall of the balancing box is a detachably arranged top cover. The pressure balancing box can balance the air pressure difference of the environmental test chamber and ensure the sealing performance of the environmental test chamber. The first plugging assembly or the second plugging assembly can be conveniently replaced.

Description

[0001] This application is a divisional application of patent application number 202211285347.6 (the original application was filed on October 20, 2022, and the invention was entitled "A Pressure Balancing Device and Environmental Test Chamber"). Technical Field

[0002] This invention relates to the field of environmental test chamber technology, and in particular to a pressure balancing device and an environmental test chamber. Background Technology

[0003] An environmental test chamber is a testing device that artificially creates various single or combined environmental factors in a specific space, and artificially changes the environmental parameters and their changes in that space according to different purposes, in order to approximate the environmental impacts that a product suffers during its lifespan. Environmental test chambers have a wide range of applications and can be used to test electronic products, electrical products, food, automotive products, rubber materials, and metal products, etc.

[0004] An environmental test chamber typically includes a test chamber, an air conditioning chamber, and a unit room. The test chamber is used to place test samples for environmental simulation tests. The air conditioning chamber is equipped with components for cooling, heating, or humidifying the air. The air conditioning chamber and the test chamber are connected and integrated. Both are insulated from the outside environment by a thermal insulation enclosure. The air conditioning chamber sends the treated air to the test chamber via a circulating fan and then returns it to the air conditioning chamber, repeating the cycle. The unit room houses components such as the refrigeration unit.

[0005] During temperature changes in an environmental test chamber, the air pressure inside the insulation layer also changes. For example, when the air conditioner inside the insulation layer cools down, the pressure inside the chamber decreases, creating a pressure difference. When this pressure difference reaches 30 kPa, it may cause the insulation layer to compress and deform. Conversely, if the internal temperature of the insulation layer rises, the internal pressure increases, creating another pressure difference. When this pressure difference reaches 44 kPa, it may cause the insulation layer to expand and deform. Therefore, existing environmental test chambers are typically equipped with pressure balancing devices to balance the pressure inside and outside the insulation layer. These devices are generally pipe structures, with one end inside the test chamber and the other end outside. This direct connection between the inside and outside of the chamber makes it difficult to ensure a tight seal. During high-temperature tests, steam continuously escapes from the external port of the pressure balancing device, potentially scalding the operator or causing visual discomfort. During low-temperature tests, frost continuously forms at the internal port, affecting the test results.

[0006] Therefore, there is an urgent need for a pressure balancing device and an environmental test chamber to solve the above problems. Summary of the Invention

[0007] One objective of this invention is to provide a pressure balancing device to balance the air pressure difference in an environmental test chamber and ensure the sealing performance of the environmental test chamber, and to facilitate the disassembly and replacement of the first sealing component or the second sealing component.

[0008] Another object of the present invention is to provide an environmental test chamber that uses the above-mentioned pressure balancing device to balance the air pressure in order to meet the sealing requirements.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] In a first aspect, a pressure balancing device is provided, the pressure balancing device comprising:

[0011] A balance box, wherein an air inlet and an air outlet are provided on the side wall of the balance box;

[0012] A first sealing component is disposed at the air inlet. The first sealing component includes a first elastic sheet, which is disposed on the inner side of the balance box where the air inlet is located. The first elastic sheet is used to seal or open the air inlet.

[0013] The second sealing component is disposed at the air outlet. The second sealing component includes a second elastic sheet, which is disposed on the outside of the balance box where the air outlet is located. The second elastic sheet is used to block or open the air outlet.

[0014] A piping assembly, one end of which is connected to the balance box, and the other end of which is used to connect to the air conditioning chamber of the environmental test chamber;

[0015] The top wall of the balance box is a detachable top cover.

[0016] As an optional technical solution, when the first elastic sheet is a circular sheet structure, the torque length of the first elastic sheet is the radius length; when the first elastic sheet is a square sheet structure, the torque length of the first elastic sheet is half the side length; and when the first elastic sheet is a rectangular sheet structure, the torque length of the first elastic sheet is half the length of the longer side.

[0017] As an optional technical solution, the first sealing component further includes a first pressure plate, which presses against the side of the first elastic sheet away from the air inlet, and the first pressure plate is used to limit the deformation of the first elastic sheet;

[0018] The second sealing assembly further includes a second pressure plate, which presses against the side of the second elastic sheet away from the air outlet, and the second pressure plate is used to limit the deformation of the second elastic sheet.

[0019] As an optional technical solution, the air inlet is a circular opening, and both the first elastic sheet and the first pressure plate are configured as circular sheet structures. The diameter of the first elastic sheet is greater than or equal to the diameter of the air inlet, and the diameter of the first pressure plate is smaller than the diameter of the first elastic sheet.

[0020] The air outlet is circular, and both the second elastic sheet and the second pressure plate are circular sheet structures. The diameter of the second elastic sheet is greater than or equal to the diameter of the air outlet, and the diameter of the second pressure plate is less than the diameter of the second elastic sheet.

[0021] As an optional technical solution, the balance box includes:

[0022] A first mesh plate is disposed at the air inlet, and the middle part of the first elastic sheet is fixedly connected to the inner side of the first mesh plate. The mesh of the first mesh plate is disposed opposite to the periphery of the first elastic sheet.

[0023] The second mesh plate is disposed at the air outlet, and the middle part of the second elastic sheet is fixedly connected to the outer side of the second mesh plate. The mesh of the second mesh plate is disposed opposite to the periphery of the second elastic sheet.

[0024] As an optional technical solution, the first grid plate has a first mounting hole in the center, and the first sealing component also includes a first threaded fastener and a first nut. The first threaded fastener passes through the first mounting hole, the center hole of the first elastic sheet and the center hole of the first pressure plate in sequence. The first nut is sleeved on the outer periphery of the first threaded fastener. The first nut and the first threaded fastener cooperate to press the first pressure plate and the first elastic sheet against the first grid plate.

[0025] The second grid plate has a second mounting hole in the center. The second sealing assembly also includes a second threaded fastener and a second nut. The second threaded fastener passes through the center hole of the second pressure plate, the center hole of the second elastic sheet and the second mounting hole in sequence. The second nut is sleeved on the outer periphery of the second threaded fastener. The second nut and the second threaded fastener cooperate to press the second pressure plate and the second elastic sheet against the second grid plate.

[0026] Secondly, an environmental test chamber is provided, including a unit room, an air conditioning room, a test room, and a pressure balancing device as described above. The balancing chamber is disposed in the unit room, and the end of the pipeline assembly away from the balancing chamber is connected to the air conditioning room.

[0027] As an optional technical solution, a water receiving tray is installed in the unit room, and the water receiving tray is located below the balance box.

[0028] As an optional technical solution, the piping assembly includes a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is connected to the balance box, and the other end of the first connecting pipe is connected to the second connecting pipe. The other end of the second connecting pipe is connected to the air conditioning room. The first connecting pipe is located entirely within the unit room, and the second connecting pipe passes through the unit room and the air conditioning room. The second connecting pipe is made of heat-insulating material.

[0029] As an optional technical solution, the air-conditioned room is provided with a baffle plate and a circulating fan. The baffle plate is located between the circulating fan and the port of the duct assembly, and the baffle plate is located on one side of the port of the duct assembly.

[0030] The beneficial effects of this invention are as follows:

[0031] This invention provides a pressure balancing device and an environmental test chamber, the environmental test chamber including the pressure balancing device. When the temperature inside the air-conditioned room is within a preset range, for example during heat preservation, the air pressure inside the air-conditioned room remains balanced with the atmospheric pressure. At this time, both the first and second elastic plates remain in their initial state, i.e., the first elastic plate blocks the air inlet and the second elastic plate blocks the air outlet to ensure sealing performance. When the temperature inside the air-conditioned room decreases, the air pressure inside the air-conditioned room drops, and the air pressure inside the pipe assembly and the balance box also decreases accordingly. Since the second elastic plate is located on the outside of the balance box and the first elastic plate is located on the inside of the balance box, the second elastic plate is not pushed open but instead enhances the sealing. The airtightness of the outlet is ensured by the first elastic plate being pushed open, allowing outside gas to pass sequentially through the inlet, the interior of the balance chamber, and the interior of the piping assembly before finally entering the air-conditioned chamber. This balances the air pressure and prevents the environmental test chamber from collapsing or deforming. When the temperature inside the air-conditioned chamber rises, the air pressure inside the chamber increases, and the air pressure inside the piping assembly and the balance chamber also rises accordingly. At this point, the first elastic plate is not pushed open and instead enhances the airtightness of the inlet seal, while the second elastic plate is pushed open, releasing the gas inside the air-conditioned chamber and reducing the air pressure, thus preventing the environmental test chamber from expanding and deforming. The top wall of the balance chamber is a removable cover, allowing for easy removal and replacement of the first or second sealing assembly. Attached Figure Description

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments;

[0033] Figure 1 This is a cross-sectional view of the environmental test chamber described in the embodiment;

[0034] Figure 2This is a schematic diagram of the pressure balancing device described in the embodiment;

[0035] Figure 3 This is an exploded view of a portion of the structure of the pressure balancing device described in the embodiment;

[0036] Figure 4 This is a partial structural schematic diagram of the pressure balancing device described in the embodiment;

[0037] Figure 5 This is a partial structural schematic diagram of the pressure balancing device described in the embodiment from another perspective;

[0038] Figure 6 This is a partial structural cross-sectional view of the pressure balancing device described in the embodiment;

[0039] Figure 7 for Figure 6 A magnified view of a portion of position A in the middle;

[0040] Figure 8 for Figure 6 A magnified view of the area at position B in the middle.

[0041] In the picture:

[0042] 100. Pressure balancing device; 200. Unit room; 300. Air conditioning room; 400. Test room; 500. Water receiving tray; 600. Fasteners; 700. Wind deflector;

[0043] 1. Balance box; 11. Air inlet; 12. Air outlet; 13. First mesh plate; 131. First mounting hole; 14. Second mesh plate; 141. Second mounting hole; 15. Top cover;

[0044] 2. First sealing assembly; 21. First elastic sheet; 22. First pressure plate; 23. First threaded fastener; 24. First nut; 25. First washer;

[0045] 3. Second sealing assembly; 31. Second elastic sheet; 32. Second pressure plate; 33. Second threaded fastener; 34. Second nut; 35. Second washer;

[0046] 4. Pipe assembly; 41. First connecting pipe; 42. Second connecting pipe; 43. First fixing plate; 44. Second fixing plate. Detailed Implementation

[0047] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0048] In the description of this invention, 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 invention based on the specific circumstances.

[0049] 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.

[0050] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0051] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0052] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0053] like Figures 2 to 8 As shown, this embodiment provides a pressure balancing device 100, which includes a balancing chamber 1, a first sealing component 2, a second sealing component 3, and a pipeline assembly 4. The side wall of the balancing chamber 1 is provided with an air inlet 11 and an air outlet 12. The first sealing component 2 is located at the air inlet 11 and includes a first elastic sheet 21, which is located inside the balancing chamber 1 where the air inlet 11 is located. The first elastic sheet 21 is used to seal or open the air inlet 11. The second sealing component 3 is located at the air outlet 12 and includes a second elastic sheet 31, which is located outside the balancing chamber 1 where the air outlet 12 is located. The second elastic sheet 31 is used to seal or open the air outlet 12. One end of the pipeline assembly 4 is connected to the balancing chamber 1, and the other end of the pipeline assembly 4 is used to connect to the air conditioning chamber 300 of an environmental test chamber.

[0054] When the temperature inside the air-conditioned room 300 is within a preset range, such as during heat preservation, the air pressure inside the air-conditioned room 300 remains balanced with atmospheric pressure. At this time, both the first elastic plate 21 and the second elastic plate 31 remain in their initial state, that is, the first elastic plate 21 blocks the air inlet 11 and the second elastic plate 31 blocks the air outlet 12 to ensure sealing performance. When the temperature inside the air-conditioned room 300 decreases, the air pressure inside the air-conditioned room 300 decreases, and the air pressure inside the pipe assembly 4 and the balance box 1 also decreases accordingly. Since the second elastic plate 31 is located on the outside of the balance box 1 and the first elastic plate 21 is located on the inside of the balance box 1, the second elastic plate 31 is not pushed open but instead increases. To ensure the airtightness of the air outlet 12, the first elastic plate 21 is pushed open, allowing external gas to pass through the air inlet 11, the interior of the balance box 1, and the interior of the pipe assembly 4 in sequence, finally entering the air-conditioning chamber 300. This balances the air pressure and prevents the environmental test chamber from collapsing and deforming. When the temperature inside the air-conditioning chamber 300 rises, the air pressure inside the air-conditioning chamber 300 also rises, as do the air pressure inside the pipe assembly 4 and the balance box 1. At this time, the first elastic plate 21 is not pushed open and instead improves the airtightness of the air inlet 11, while the second elastic plate 31 is pushed open, releasing the gas in the air-conditioning chamber 300 and reducing the air pressure in the air-conditioning chamber 300, thus preventing the environmental test chamber from expanding and deforming.

[0055] Both the first elastic sheet 21 and the second elastic sheet 31 are made of elastic material. In this embodiment, both the first elastic sheet 21 and the second elastic sheet 31 are silicone sheets. Silicone sheets have good resistance to high and low temperatures and aging resistance, which can extend the service life. The thickness of the silicone sheet is set to 0.5 mm to 1.2 mm, for example, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, preferably 1 mm.

[0056] Optionally, the first sealing assembly 2 further includes a first pressure plate 22, which presses against the side of the first elastic sheet 21 away from the air inlet 11, and the first pressure plate 22 is used to limit the deformation of the first elastic sheet 21; the second sealing assembly 3 further includes a second pressure plate 32, which presses against the side of the second elastic sheet 31 away from the air outlet 12, and the second pressure plate 32 is used to limit the deformation of the second elastic sheet 31.

[0057] When there is a pressure difference between the two sides of an object, the object tends to move towards the side with lower pressure. Therefore, in this embodiment, when the atmospheric pressure is greater than the air pressure inside the balance box 1, both the second elastic plate 31 located on the outside of the balance box 1 and the first elastic plate 21 located on the inside of the balance box 1 tend to move towards the center of the balance box 1. At this time, at least a portion of the first elastic plate 21 detaches from the air inlet 11. However, when the atmospheric pressure is much greater than the air pressure inside the balance box 1, if the first elastic plate 21 is not supported, it will deform excessively towards the center of the balance box 1, or even completely detach from the air inlet 11. In this case, after the air pressure is balanced, the first elastic plate 21 will not be able to return to seal the air inlet 11 and will completely lose its sealing function. To avoid this situation, in this embodiment, a first pressure plate 22 is provided on the side of the first elastic plate 21 away from the air inlet 11. The first pressure plate 22 supports a portion of the first elastic plate 21, thereby restricting the first elastic plate 21. Deformation; When the air pressure inside the balance box 1 is greater than atmospheric pressure, both the second elastic plate 31 located on the outside of the balance box 1 and the first elastic plate 21 located on the inside of the balance box 1 tend to move away from the center of the balance box 1. At this time, at least a part of the second elastic plate 31 is detached from the air outlet 12. However, when the air pressure inside the balance box 1 is much greater than atmospheric pressure, if the second elastic plate 31 is not supported, the second elastic plate 31 will deform excessively to the side away from the center of the balance box 1, or even the second elastic plate 31 may completely detach from the air outlet 12. In this case, after the air pressure is balanced, the second elastic plate 31 will not be able to return to seal the air outlet 12 and will completely lose its sealing function. In order to avoid this situation, in this embodiment, a second pressure plate 32 is provided on the side of the second elastic plate 31 away from the air outlet 12. The second pressure plate 32 supports a part of the second elastic plate 31, thereby limiting the deformation of the second elastic plate 31.

[0058] In this embodiment, both the first pressure plate 22 and the second pressure plate 32 are rigid components, for example, made of plastic or metal materials.

[0059] Optionally, the balance box 1 includes a first grid plate 13 and a second grid plate 14. The first grid plate 13 is disposed at the air inlet 11, and the middle part of the first elastic sheet 21 is fixedly connected to the inner side of the first grid plate 13. The mesh of the first grid plate 13 is arranged opposite to the periphery of the first elastic sheet 21. The second grid plate 14 is disposed at the air outlet 12, and the middle part of the second elastic sheet 31 is fixedly connected to the outer side of the second grid plate 14. The mesh of the second grid plate 14 is arranged opposite to the periphery of the second elastic sheet 31.

[0060] Specifically, to reduce the noise generated by the impact of the elastic sheet on the balance box 1 when returning to its original shape due to excessive elastic deformation, this embodiment reduces the elastic deformation of the first elastic sheet 21 and the second elastic sheet 31 while ensuring smooth gas flow, so as to shorten the time required for equalizing the air pressure. Therefore, in this embodiment, under pressure balance, the first elastic sheet 21 completely seals the mesh of the first grid plate 13, and the second elastic sheet 31 completely seals the mesh of the second grid plate 14. When the atmospheric pressure is greater than the air pressure inside the balance box 1, the middle part of the first elastic sheet 21 is fixedly connected to the first grid plate 13, and the periphery of the first elastic sheet 21 tilts and deforms towards the center of the balance box 1. When the first elastic sheet 21 is a circular sheet structure, the torque length of the first elastic sheet 21 is equal to the radius length; when the first elastic sheet 21 is a square sheet structure, the torque length of the first elastic sheet 21 is half the side length. When the elastic sheet 21 is a rectangular sheet structure, the torque length of the first elastic sheet 21 is half the length of the long side. Therefore, compared with the solution of fixing one end of the elastic sheet and leaving the other end as a free end, this embodiment sets the fixing point of the first elastic sheet 21 in the middle, which can shorten the torque radius and reduce the noise generated when impacting the balance box 1. After the gas passes through the mesh of the first grid plate 13, it enters the interior of the balance box 1 from the periphery of the first elastic sheet 21. The periphery of the first elastic sheet 21 undergoes overall elastic deformation, and the gas flow area is not reduced. The gas can still pass smoothly through the gap between the first elastic sheet 21 and the balance box 1, thereby shortening the time required to balance the air pressure. In this embodiment, the middle part of the second elastic sheet 31 is fixedly connected to the second grid plate 14, which can also achieve the same technical effect as the fixed connection between the middle part of the first elastic sheet 21 and the first grid plate 13. The working principle will not be described in detail in this embodiment.

[0061] In this embodiment, both the first grid plate 13 and the second grid plate 14 are spoke-type structures.

[0062] Optionally, the first grid plate 13 has a first mounting hole 131 at its center. The first sealing component 2 also includes a first threaded fastener 23 and a first nut 24. The first threaded fastener 23 passes through the first mounting hole 131, the center hole of the first elastic piece 21, and the center hole of the first pressure plate 22 in sequence. The first nut 24 is sleeved on the outer periphery of the first threaded fastener 23. The first nut 24 and the first threaded fastener 23 cooperate to press the first pressure plate 22 and the first elastic piece 21 against the first grid plate 13. The second grid plate 14 has a second mounting hole 141 at its center. The second sealing component 3 also includes a second threaded fastener 33 and a second nut 34. The second threaded fastener 33 passes through the center hole of the second pressure plate 32, the center hole of the second elastic piece 31, and the second mounting hole 141 in sequence. The second nut 34 is sleeved on the outer periphery of the second threaded fastener 33. The second nut 34 and the second threaded fastener 33 cooperate to press the second pressure plate 32 and the second elastic piece 31 against the second grid plate 14.

[0063] Optionally, the first threaded fastener 23 and the second threaded fastener 33 are bolts or screws. In this embodiment, both the first threaded fastener 23 and the second threaded fastener 33 are bolts.

[0064] Specifically, the first nut 24 and the first threaded fastener 23 are connected to press the first pressure plate 22 and the first elastic sheet 21 against the first mesh plate 13 to ensure sealing performance and facilitate the disassembly and replacement of the first pressure plate 22 or the first elastic sheet 21; similarly, the second pressure plate 32 and the second elastic sheet 31 are also easy to disassemble and replace.

[0065] Optionally, a first washer 25 is provided between the nut of the first threaded fastener 23 and the first pressure plate 22. The diameter of the first washer 25 is larger than the diameter of the nut of the first threaded fastener 23. Similarly, a second washer 35 is provided between the nut of the second threaded fastener 33 and the second mesh plate 14. The diameter of the second washer 35 is larger than the diameter of the nut of the second threaded fastener 33. Using a larger diameter first washer 25 increases the force application area of ​​the first threaded fastener 23 on the first mesh plate 13, increasing pressure and improving connection stability. Similarly, using a larger diameter second washer 35 increases the force application area of ​​the second threaded fastener 33 on the second pressure plate 32, increasing pressure and improving connection stability.

[0066] In this embodiment, the first sealing component 2 is installed at the air inlet 11 from the inside out as follows: first nut 24, first pressure plate 22, first elastic sheet 21, first mesh plate 13, first gasket 25, and first threaded fastener 23. The second sealing component 3 is installed at the air outlet 12 from the inside out as follows: second nut 34, second mesh plate 14, second elastic sheet 31, second pressure plate 32, second gasket 35, and second threaded fastener 33.

[0067] In this embodiment, the air inlet 11 is circular, and both the first elastic sheet 21 and the first pressure plate 22 are circular sheet structures. The diameter of the first elastic sheet 21 is greater than or equal to the diameter of the air inlet 11, and the diameter of the first pressure plate 22 is smaller than the diameter of the first elastic sheet 21. The air outlet 12 is circular, and both the second elastic sheet 31 and the second pressure plate 32 are circular sheet structures. The diameter of the second elastic sheet 31 is greater than or equal to the diameter of the air outlet 12, and the diameter of the second pressure plate 32 is smaller than the diameter of the second elastic sheet 31. Preferably, the diameter of the first pressure plate 22 is half the diameter of the first elastic sheet 21, and the diameter of the second pressure plate 32 is half the diameter of the second elastic sheet 31; the diameters of the first elastic sheet 21 and the second elastic sheet 31 are equal, and the diameters of the air inlet 11 and the air outlet 12 are equal; the diameter of the first elastic sheet 21 is 3 mm to 6 mm larger than the diameter of the air inlet 11, and the diameter of the second elastic sheet 31 is 3 mm to 6 mm larger than the diameter of the air outlet 12.

[0068] In some other embodiments, both the air inlet 11 and the air outlet 12 are square openings, and both the first elastic sheet 21 and the second elastic sheet 31 are square sheet structures.

[0069] In this embodiment, the top wall of the balance box 1 is a detachable top cover 15, and one end of the pipe assembly 4 is connected to the bottom wall of the balance box 1. After removing the top cover 15, the first sealing assembly 2 or the second sealing assembly 3 can be easily disassembled and replaced.

[0070] In some other embodiments, the side wall of the balance box 1 that is not provided with an air inlet 11 or an air outlet 12 is a detachable wall panel. After the wall panel is removed, the first sealing component 2 or the second sealing component 3 can be easily disassembled and replaced.

[0071] In this embodiment, the air inlet 11 and the air outlet 12 are respectively disposed on two opposite side walls of the balance box 1. In other embodiments, the air inlet 11 and the air outlet 12 are disposed on the same side wall or two adjacent side walls of the balance box 1.

[0072] In this embodiment, the balance box 1 is sealed except for the air inlet 11, the air outlet 12 and the interface connected to the pipe assembly 4.

[0073] like Figure 1 As shown, this embodiment also provides an environmental test chamber, including a unit room 200, an air conditioning room 300, a test chamber 400, and the pressure balancing device 100 as described above. The balancing box 1 is disposed in the unit room 200, and the end of the pipe assembly 4 away from the balancing box 1 is connected to the air conditioning room 300.

[0074] Specifically, in this embodiment, the balance box 1 is placed inside the unit room 200 instead of outside the environmental test chamber. This avoids the steam from the outlet 12 being directly discharged outside the environmental test chamber during high-temperature testing, thus preventing burns to the operator or affecting the appearance. The end of the pipe assembly 4 furthest from the balance box 1 is connected to the air conditioning room 300 instead of the test room 400, which prevents air from directly entering the test room 400 and ensures that the test sample being tested is not affected by the humidity or temperature of the new air.

[0075] Optionally, a condensate tray 500 is installed inside the unit compartment 200, located below the balance tank 1. The condensate tray 500 collects condensate from the balance tank 1 to prevent it from dripping directly into the unit compartment 200. Optionally, the condensate tray 500 is connected to a drain pipe to discharge the condensate to the outside of the environmental test chamber.

[0076] Optionally, a fixing component 600 is fixedly installed inside the unit room 200, and the water receiving tray 500 is fixedly connected to the fixing component 600.

[0077] Optionally, the piping assembly 4 includes a first connecting pipe 41 and a second connecting pipe 42. One end of the first connecting pipe 41 is connected to the balance box 1, and the other end of the first connecting pipe 41 is connected to the second connecting pipe 42. The other end of the second connecting pipe 42 is connected to the air conditioning room 300. The first connecting pipe 41 is located entirely within the unit room 200, and the second connecting pipe 42 passes through the unit room 200 and the air conditioning room 300. The second connecting pipe 42 is made of heat-insulating material.

[0078] Specifically, the second connecting pipe 42 is made of heat-insulating material such as heat-insulating silicone, which can reduce heat transfer and reduce heat transfer between the unit room 200 and the air-conditioning room 300.

[0079] Specifically, the first connecting pipe 41 is made of metal materials such as stainless steel or aluminum alloy. One end of the first connecting pipe 41 is welded and sealed to the bottom wall of the balance box 1. The other end of the first connecting pipe 41 is connected to the second connecting pipe 42 and then fixed with a stainless steel hose clamp.

[0080] Optionally, an air-conditioning chamber 300 is equipped with a baffle plate 700 and a circulating fan. The baffle plate 700 is located between the circulating fan and the port of the duct assembly 4, and is positioned on one side of the port of the duct assembly 4. When the circulating fan in the air-conditioning chamber 300 is running, the baffle plate 700 can prevent external air from being directly drawn into the air-conditioning chamber 300 through the pressure balancing device 100, thus preventing it from affecting the temperature and humidity environment of the test chamber 400.

[0081] Optionally, the pipe assembly 4 further includes a first fixing plate 43 and a second fixing plate 44. The first fixing plate 43 is disposed on the inner wall of the air conditioning compartment 300 and sleeved on the outer periphery of the second connecting pipe 42. The first fixing plate 43 is used to fix one end of the second connecting pipe 42 that extends into the air conditioning compartment 300 to the inner wall of the air conditioning compartment 300. The second fixing plate 44 is disposed on the inner wall of the unit compartment 200 and sleeved on the outer periphery of the second connecting pipe 42. The second fixing plate 44 is used to fix a section of the second connecting pipe 42 that passes through the side wall of the unit compartment 200 to the unit compartment 200.

[0082] Optionally, the second connecting pipe 42 includes a bent section and a through section, the bent section being connected to the first connecting pipe 41, and the through section passing through the unit room 200 and the air conditioning room 300.

[0083] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A pressure balancing device, characterized in that, include: Balance box (1), the side wall of the balance box (1) is provided with an air inlet (11) and an air outlet (12); The first sealing component (2) is disposed at the air inlet (11). The first sealing component (2) includes a first elastic sheet (21), which is disposed on the inner side of the balance box (1) where the air inlet (11) is located. The first elastic sheet (21) is used to block or open the air inlet (11). The first sealing component (2) also includes a first pressure plate (22), which presses against the side of the first elastic sheet (21) away from the air inlet (11). The first pressure plate (22) is used to limit the deformation of the first elastic sheet (21). The second sealing component (3) is disposed at the air outlet (12). The second sealing component (3) includes a second elastic sheet (31), which is disposed on the outside of the air outlet (12) of the balance box (1). The second elastic sheet (31) is used to block or open the air outlet (12). The second sealing component (3) also includes a second pressure plate (32), which presses against the side of the second elastic sheet (31) away from the air outlet (12). The second pressure plate (32) is used to limit the deformation of the second elastic sheet (31). Pipe assembly (4), one end of which is connected to the balance box (1), and the other end of which is used to connect to the air-conditioning chamber (300) of the environmental test chamber; The top wall of the balance box (1) is a detachable top cover (15).

2. The pressure balancing device according to claim 1, characterized in that, When the first elastic sheet (21) is a circular sheet structure, the torque length of the first elastic sheet (21) is the radius length; when the first elastic sheet (21) is a square sheet structure, the torque length of the first elastic sheet (21) is half the side length; when the first elastic sheet (21) is a rectangular sheet structure, the torque length of the first elastic sheet (21) is half the length of the longer side.

3. The pressure balancing device according to claim 1, characterized in that, The air inlet (11) is a circular opening. The first elastic sheet (21) and the first pressure plate (22) are both set as circular sheet structures. The diameter of the first elastic sheet (21) is greater than or equal to the diameter of the air inlet (11), and the diameter of the first pressure plate (22) is smaller than the diameter of the first elastic sheet (21). The air outlet (12) is a circular opening. The second elastic sheet (31) and the second pressure plate (32) are both set as circular sheet structures. The diameter of the second elastic sheet (31) is greater than or equal to the diameter of the air outlet (12), and the diameter of the second pressure plate (32) is smaller than the diameter of the second elastic sheet (31).

4. The pressure balancing device according to claim 1, characterized in that, The balance box (1) includes: The first mesh plate (13) is disposed at the air inlet (11), and the middle part of the first elastic sheet (21) is fixedly connected to the inner side of the first mesh plate (13). The mesh of the first mesh plate (13) is disposed opposite to the periphery of the first elastic sheet (21). The second mesh plate (14) is disposed at the air outlet (12), and the middle part of the second elastic sheet (31) is fixedly connected to the outer side of the second mesh plate (14). The mesh of the second mesh plate (14) is disposed opposite to the periphery of the second elastic sheet (31).

5. The pressure balancing device according to claim 4, characterized in that, The first grid plate (13) has a first mounting hole (131) in the center. The first sealing component (2) also includes a first threaded fastener (23) and a first nut (24). The first threaded fastener (23) passes through the first mounting hole (131), the center hole of the first elastic piece (21) and the center hole of the first pressure plate (22) in sequence. The first nut (24) is sleeved on the outer periphery of the first threaded fastener (23). The first nut (24) and the first threaded fastener (23) cooperate to press the first pressure plate (22) and the first elastic piece (21) against the first grid plate (13). The second mesh plate (14) has a second mounting hole (141) in the center. The second sealing assembly (3) also includes a second threaded fastener (33) and a second nut (34). The second threaded fastener (33) passes through the center hole of the second pressure plate (32), the center hole of the second elastic piece (31) and the second mounting hole (141) in sequence. The second nut (34) is sleeved on the outer periphery of the second threaded fastener (33). The second nut (34) and the second threaded fastener (33) cooperate to press the second pressure plate (32) and the second elastic piece (31) against the second mesh plate (14).

6. An environmental test chamber, characterized in that, The system includes a unit room (200), an air conditioning room (300), a test room (400), and a pressure balancing device as described in any one of claims 1-5, wherein the balancing box (1) is disposed in the unit room (200), and the end of the pipe assembly (4) away from the balancing box (1) is connected to the air conditioning room (300).

7. The environmental test chamber according to claim 6, characterized in that, A water receiving tray (500) is provided inside the unit room (200), and the water receiving tray (500) is located below the balance box (1).

8. The environmental test chamber according to claim 6, characterized in that, The pipe assembly (4) includes a first connecting pipe (41) and a second connecting pipe (42). One end of the first connecting pipe (41) is connected to the balance box (1), and the other end of the first connecting pipe (41) is connected to the second connecting pipe (42). The other end of the second connecting pipe (42) is connected to the air conditioning room (300). The first connecting pipe (41) is located entirely inside the unit room (200), and the second connecting pipe (42) passes through the unit room (200) and the air conditioning room (300). The second connecting pipe (42) is made of heat-insulating material.

9. The environmental test chamber according to claim 6, characterized in that, The air-conditioned room (300) is provided with a baffle plate (700) and a circulating fan. The baffle plate (700) is located between the circulating fan and the port of the pipe assembly (4), and the baffle plate (700) is located on one side of the port of the pipe assembly (4).

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