Pressure balance structure and temperature shock test device

Abstract

This utility model belongs to the field of pressure balancing technology and discloses a pressure balancing structure and a temperature shock testing device. The temperature shock testing device includes a temperature shock test chamber and a pressure balancing structure. The temperature shock test chamber has a cold zone and a hot zone. The pressure balancing structure includes a two-way valve and two pipe assemblies for air conduction. The two ends of the two-way valve are respectively sealed and connected to the two first ends of the two pipe assemblies. The two second ends of the two pipe assemblies are respectively sealed and connected to the vent holes of the cold zone and the hot zone on the temperature shock test chamber. When the two-way valve is open, the two pipe assemblies connect to form a connecting channel, allowing air to flow freely between the cold and hot zones to balance the pressure between them. When the two-way valve is closed, the connecting channel is disconnected, blocking the air flow between the cold and hot zones to maintain their respective temperature environments. The pressure balancing structure balances the pressure between the cold and hot zones only when needed.

Description

Technical Field

[0001] This utility model relates to the field of pressure balance technology, and in particular to pressure balance structure and temperature shock testing device. Background Technology

[0002] Temperature shock test chambers are essential testing equipment in the metal, plastic, rubber, and electronics industries. They are used to test the structure of materials or composite materials and their ability to withstand extremely high and low temperatures in a short period of time. This allows for the detection of chemical changes or physical damage caused by thermal expansion and contraction within the sample. During testing, the sample needs to be rapidly switched between cold and hot zones.

[0003] The temperature shock test chamber has cold and hot zones arranged side-by-side, connected by a channel for a moving trolley. The test sample is placed on the trolley, with the end closer to the cold zone defined as the cold end and the end closer to the hot zone defined as the hot end. Both ends of the trolley are equipped with seals. The trolley moves from the hot zone through the channel to the cold zone, eventually entering the cold zone completely. The sample then enters the cold zone to undergo low-temperature shock. At this point, the seal on the cold end of the trolley aligns with the sealing reference surface on the cold zone side of the channel, thus isolating the cold and hot zones. Conversely, the trolley moves from the cold zone through the channel to the hot zone, eventually entering the hot zone completely. The sample then enters the hot zone to undergo high-temperature shock. At this point, the seal on the hot end of the trolley is precisely aligned with the sealing reference surface on the hot zone side of the channel, thus isolating the cold and hot zones.

[0004] Currently, to ensure pressure balance between the cold and hot zones during cooling and heating processes, as well as during the switching of the mobile vehicle between the cold and hot zones, a balancing pipe is typically installed. The two ends of the balancing pipe are directly connected to the cold and hot zones respectively. This results in continuous gas exchange between the cold and hot zones. The connection between the balancing pipe and the cold zone is frosted due to the entry of air from the hot zone. During the circulation of air from the hot zone into the cold zone, frost easily forms on the evaporator. After frosting, the cooling capacity decreases, leading to a reduction in the number of consecutive shock cycles.

[0005] Therefore, there is an urgent need for pressure balancing structures and temperature shock testing devices to solve the above problems. Utility Model Content

[0006] The first objective of this invention is to provide a pressure balancing structure that balances the pressure between the cold and hot zones only when needed, preventing frost from forming at the connection between the pressure balancing structure and the cold zone, as well as frost from the evaporator, thereby increasing the number of consecutive impact cycles.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] The pressure balancing structure includes a two-way valve and two pipe assemblies for air conduction. The two ends of the two-way valve are respectively sealed and connected to the two first ends of the two pipe assemblies, and the two second ends of the two pipe assemblies are respectively sealed and connected to the vent holes of the cold zone and the hot zone on the temperature shock test chamber. When the two-way valve is open, the two pipe assemblies are connected to form a connecting channel, and the air in the cold zone and the hot zone can flow freely in the connecting channel to balance the pressure between the cold zone and the hot zone. When the two-way valve is closed, the connecting channel is disconnected, blocking the air flow between the cold zone and the hot zone to maintain the respective temperature environment of the cold zone and the hot zone.

[0009] As an alternative pressure balancing structure, both pipe assemblies include a first connecting part, a through pipe, and a second connecting part. The two ends of the bidirectional two-way valve are respectively connected to the first ends of the two first connecting parts; the second ends of the two first connecting parts are respectively connected to the first ends of the two through pipes; the second ends of the two through pipes are respectively connected to the first ends of the two second connecting parts; and the second ends of the two second connecting parts can be respectively connected to the vent of the cold zone and the vent of the hot zone.

[0010] As an optional solution for the pressure balancing structure, the first connection part includes a one-way external threaded tube, a first connecting flange, and a first connecting pipe. The first end of the one-way external threaded tube is provided with an external thread, and the two-way valve is provided with an internal thread that mates with the external thread. The first end of the one-way external threaded tube is threadedly connected to one end of the two-way valve. The two sides of the first connecting flange are respectively fixedly connected to the second end of the one-way external threaded tube and the first connecting pipe. The first connecting pipe is inserted into the first end of the corresponding connecting pipe.

[0011] As an alternative to the pressure balancing structure, the unidirectional external threaded tube, the first connecting flange, and the first connecting pipe are all made of stainless steel.

[0012] As an alternative to the pressure balancing structure, the two sides of the first connecting flange are fixedly connected to the second end of the unidirectional external threaded tube and the first connecting pipe by welding.

[0013] As an alternative to the pressure balancing structure, the second connection includes a second connecting pipe, a bend, and a second connecting flange connected in sequence. The second connecting pipe is inserted into the second end of the corresponding through pipe, and the second connecting flange is sealed to the corresponding vent of the temperature shock test chamber, so that the bend can communicate with the cold zone or the hot zone through the vent.

[0014] As an alternative to the pressure balancing structure, the second connecting pipe, the bend, and the second connecting flange are all made of stainless steel.

[0015] As an alternative to the pressure balancing structure, the conduit is a silicone mesh tube.

[0016] As an alternative to the pressure balancing structure, the pressure balancing structure also includes a controller that is communicatively connected to the two-way valve. The controller is configured to open the two-way valve at a first preset time and close the two-way valve at a second preset time.

[0017] The second objective of this invention is to provide a temperature shock testing device. By adopting the aforementioned pressure balancing structure, the pressure of the cold and hot zones can be balanced when needed. It can also prevent frost from forming at the connection between the pressure balancing structure and the cold zone due to the entry of air from the hot zone. This reduces the occurrence of frost forming on the evaporator caused by the entry of air from the hot zone into the cold zone, thus ensuring the evaporator's cooling capacity and increasing the number of consecutive shocks.

[0018] To achieve this objective, the present invention adopts the following technical solution:

[0019] A temperature shock test apparatus includes a temperature shock test chamber and the aforementioned pressure balancing structure. The temperature shock test chamber is provided with a cold zone and a hot zone. The pressure balancing structure is configured to balance the pressure between the cold zone and the hot zone within a preset time.

[0020] Beneficial effects:

[0021] This invention provides a pressure balancing structure. During operation, the two ends of a bidirectional two-way valve are sealed and connected to the two first ends of two pipe assemblies, respectively. The two second ends of the two pipe assemblies are sealed and connected to the cold zone vent and the hot zone vent, respectively. When the cold and hot zones of the temperature shock test chamber need pressure balancing, such as during cold zone cooling, hot zone heating, or zone switching by a moving vehicle, the bidirectional two-way valve is opened, connecting the two pipe assemblies to form a connecting channel. Air from the cold and hot zones can flow freely within this channel, quickly achieving pressure balancing. When pressure balancing is not required, the bidirectional two-way valve is closed, disconnecting the connecting channel and effectively blocking airflow between the cold and hot zones, thus stabilizing the low temperature in the cold zone and the high temperature in the hot zone. This pressure balancing structure avoids continuous gas exchange between the cold and hot zones, preventing frost formation at the cold zone vent and reducing the circulation of hot zone air into the cold zone, which could cause evaporator frost. This ensures stable cooling capacity of the evaporator and significantly increases the number of consecutive shock cycles.

[0022] This invention provides a temperature shock testing device. By adopting the above-mentioned pressure balance structure, it can avoid continuous gas exchange between the cold zone and the hot zone, prevent frost formation at the vent in the cold zone, reduce the amount of air from the hot zone entering the cold zone and causing frost formation on the evaporator, ensure the evaporator's cooling capacity, and significantly increase the number of consecutive shocks. Attached Figure Description

[0023] Figure 1 This is an exploded view of the pressure balance structure provided in an embodiment of this utility model;

[0024] Figure 2 This is a cross-sectional view of the pressure balance structure provided in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the pressure balance structure provided in an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0028] In the picture:

[0029] 1. Two-way valve;

[0030] 2. First connecting part; 21. One-way external threaded tube; 22. First connecting flange; 23. First connecting pipe;

[0031] 3. Pipe;

[0032] 4. Second connection part; 41. Second connecting pipe; 42. Bend; 43. Second connecting flange. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Temperature shock test chambers are essential testing equipment in the metal, plastic, rubber, and electronics industries. They are used to test the structure of materials or composite materials and their ability to withstand extremely high and low temperatures in a short period of time. This allows for the detection of chemical changes or physical damage caused by thermal expansion and contraction within the sample. During testing, the sample needs to be rapidly switched between cold and hot zones.

[0038] The temperature shock test chamber has cold and hot zones arranged side-by-side, connected by a channel for a moving trolley. The test sample is placed on the trolley, with the end closer to the cold zone defined as the cold end and the end closer to the hot zone defined as the hot end. Both ends of the trolley are equipped with seals. The trolley moves from the hot zone through the channel to the cold zone, eventually entering the cold zone completely. The sample then enters the cold zone to undergo low-temperature shock. At this point, the seal on the cold end of the trolley aligns with the sealing reference surface on the cold zone side of the channel, thus isolating the cold and hot zones. Conversely, the trolley moves from the cold zone through the channel to the hot zone, eventually entering the hot zone completely. The sample then enters the hot zone to undergo high-temperature shock. At this point, the seal on the hot end of the trolley is precisely aligned with the sealing reference surface on the hot zone side of the channel, thus isolating the cold and hot zones.

[0039] This embodiment discloses a pressure balancing structure and a temperature shock testing device. The temperature shock testing device includes a temperature shock test chamber and, in this embodiment, a pressure balancing structure. The temperature shock test chamber is equipped with a cold zone and a hot zone. The pressure balancing structure is used to balance the pressure between the cold zone and the hot zone within a preset time. In this temperature shock testing device, the pressure balancing structure only balances the pressure between the cold zone and the hot zone within the preset time, avoiding continuous gas exchange between the cold zone and the hot zone. This prevents frost formation at the connection point between the pressure balancing structure and the cold zone due to the entry of air from the hot zone, reduces the possibility of frost formation on the evaporator caused by the hot zone air entering the cold zone for circulation, ensures the evaporator's cooling capacity, and increases the number of consecutive shocks the temperature shock testing device can withstand.

[0040] This embodiment discloses a pressure balancing structure, such as Figures 1-3 As shown, the pressure balancing structure includes a two-way valve 1 and two pipe assemblies for conducting air. The two ends of the two-way valve 1 are respectively sealed and connected to the two first ends of the two pipe assemblies. The two second ends of the two pipe assemblies can be respectively sealed and connected to the vent holes of the cold zone and the hot zone on the temperature shock test chamber. When the two-way valve 1 is open, the two pipe assemblies are connected to form a connecting channel, and the air in the cold zone and the hot zone can flow freely in the connecting channel to balance the pressure between the cold zone and the hot zone. When the two-way valve 1 is closed, the connecting channel is disconnected, blocking the air flow between the cold zone and the hot zone to maintain the temperature environment of the cold zone and the hot zone respectively.

[0041] When this pressure balancing structure is in operation, the two ends of the bidirectional two-way valve 1 are sealed and connected to the two first ends of the two pipe assemblies, respectively. The two second ends of the two pipe assemblies are sealed and connected to the cold zone vent and the hot zone vent, respectively. When the cold and hot zones of the temperature shock test chamber need to balance pressure, such as when the cold zone cools down, the hot zone heats up, or the moving vehicle switches zones, the bidirectional two-way valve 1 is opened, and the two pipe assemblies are connected to form a connecting channel. Air from the cold and hot zones can flow freely within the connecting channel, quickly achieving pressure balance. When pressure balancing is not required, the bidirectional two-way valve 1 is closed, which disconnects the connecting channel, effectively blocking the air flow between the cold and hot zones and stably maintaining the respective temperature environments of the cold zone (low temperature) and the hot zone (high temperature). This pressure balancing structure avoids continuous gas exchange between the cold and hot zones, which can cause frost formation at the cold zone vent, and also reduces the possibility of hot zone air entering the cold zone and circulating, causing evaporator frost. This ensures the stable cooling capacity of the evaporator and significantly increases the number of consecutive shock cycles.

[0042] This temperature shock test device, employing the aforementioned pressure balance structure, can prevent continuous gas exchange between the cold and hot zones, prevent frost formation at the vents in the cold zone, reduce the amount of hot air entering the cold zone and causing frost formation on the evaporator, ensure the evaporator's cooling capacity, and significantly increase the number of consecutive shocks.

[0043] In this embodiment, the bidirectional two-way valve 1 is a sealed electric bidirectional two-way valve. The electric bidirectional two-way valve can precisely control the opening and closing of the connecting channel to achieve pressure balance. It has strong sealing performance and can completely block the air flow between the cold zone and the hot zone when closed, avoiding frost at the cold zone vent and frost on the evaporator, ensuring the evaporator's cooling capacity, and significantly increasing the number of continuous impacts of the temperature shock test device.

[0044] In other embodiments, the bidirectional two-way valve 1 can also be a sealed manual bidirectional two-way valve. The manual bidirectional two-way valve can manually control the opening and closing of the connecting channel as needed to achieve pressure balance. It has strong sealing performance and can completely block the air flow between the cold zone and the hot zone when closed, avoiding frost at the cold zone vent and frost on the evaporator, ensuring the evaporator's cooling capacity, and significantly increasing the number of continuous impacts of the temperature shock test device.

[0045] like Figures 2-3 As shown, both piping assemblies include a first connecting part 2, a through pipe 3, and a second connecting part 4. The two ends of the bidirectional two-way valve 1 are respectively connected to the first ends of the two first connecting parts 2; the second ends of the two first connecting parts 2 are respectively connected to the first ends of the two through pipes 3; the second ends of the two through pipes 3 are respectively connected to the first ends of the two second connecting parts 4; and the second ends of the two second connecting parts 4 can respectively connect to the vent holes of the cold zone and the hot zone. The piping assemblies are connected sequentially through the first connecting part 2, through pipe 3, and second connecting part 4, so that the two ends of the bidirectional two-way valve 1 are stably connected to the vent holes of the cold zone and the hot zone of the test chamber, ensuring smooth airflow during pressure balancing and reliable sealing during blockage. This prevents frost formation at the cold zone vent holes and on the evaporator, ensuring the evaporator's cooling capacity and significantly increasing the number of consecutive impacts of the temperature shock test device.

[0046] like Figures 2-4 As shown, the first connecting part 2 includes a one-way external threaded tube 21, a first connecting flange 22, and a first connecting pipe 23. The first end of the one-way external threaded tube 21 is provided with an external thread, and the two-way valve 1 is provided with an internal thread that mates with the external thread. The first end of the one-way external threaded tube 21 is threadedly connected to one end of the two-way valve 1. The two sides of the first connecting flange 22 are fixedly connected to the second end of the one-way external threaded tube 21 and the first connecting pipe 23, respectively. The first connecting pipe 23 is inserted into the first end of the corresponding connecting pipe 3. The one-way external threaded tube 21 precisely matches the internal thread of the two-way valve 1 through the external thread, achieving a stable threaded connection between the two. The two sides of the first connecting flange 22 are fixedly connected to the second end of the one-way external threaded tube 21 and the first connecting pipe 23 respectively, enhancing the connection stability. The first connecting pipe 23 is inserted into the first end of the through pipe 3, simplifying the assembly process, making the pipe assembly and the two-way valve 1 tightly connected and highly sealed, reducing air leakage, avoiding frost formation on the cold zone vent and evaporator, ensuring the evaporator's cooling capacity, and significantly increasing the number of continuous impacts of the temperature shock test device.

[0047] In this embodiment, the one-way external threaded tube 21 and the two-way two-way valve 1 can be sealed by wrapping raw rubber tape or setting a sealing gasket on the external thread of the one-way external threaded tube 21, so as to avoid gas leakage at the connection between the two.

[0048] In this embodiment, the one-way external threaded tube 21, the first connecting flange 22, and the first connecting pipe 23 are all made of stainless steel. Stainless steel has good corrosion resistance and structural stability, and can withstand the low temperature in cold zones and the high temperature in hot zones for a long time, avoiding rust or deformation that could lead to sealing failure, ensuring a stable connection between the two-way valve 1 and the connecting pipe 3, and reducing air leakage.

[0049] In this embodiment, the two sides of the first connecting flange 22 are fixedly connected to the second end of the unidirectional external threaded tube 21 and the first connecting pipe 23 by welding. The welded connection has strong sealing performance and a stable structure, which can prevent air leakage at the joint and ensure the reliability of the pressure balance structure when it is ventilated or blocked.

[0050] like Figures 2-3 , Figure 5 As shown, the second connecting part 4 includes a second connecting pipe 41, a bend 42, and a second connecting flange 43 connected in sequence. The second connecting pipe 41 is inserted into the second end of the corresponding through pipe 3. The second connecting flange 43 is sealed to the corresponding vent of the temperature shock test chamber, so that the bend 42 can communicate with the cold or hot zone through the vent. The second connecting pipe 41 is securely inserted into the second end of the through pipe 3 to ensure a tight connection. The second connecting flange 43 is sealed to the corresponding vent of the temperature shock test chamber, and together with the bend 42, it accurately achieves communication with the cold or hot zone. This strengthens the sealing performance of the pressure balance structure, significantly reduces leakage, effectively avoids unnecessary gas exchange between the cold and hot zones, prevents frost formation at the vent of the cold zone and on the evaporator, ensures the evaporator's cooling capacity, and significantly increases the number of consecutive impacts of the temperature shock test device.

[0051] In this embodiment, the second connecting pipe 41, the bend 42, and the second connecting flange 43 are all made of stainless steel. Stainless steel has excellent resistance to high and low temperatures and corrosion, and can adapt to low-temperature environments in cold zones and high-temperature environments in hot zones for a long time. This avoids rust or deformation that could lead to sealing failure, ensuring a stable connection between the through pipe 3 and the vent hole, and reducing air leakage.

[0052] In this embodiment, the second connecting pipe 41, the bend 42, and the second connecting flange 43 are sequentially fixedly connected by welding. The welded connection has strong sealing performance and a stable structure, which can prevent air leakage at the joint and ensure the reliability of the pressure balance structure when it is ventilated or blocked.

[0053] In this embodiment, the through-pipe 3 is a silicone mesh tube. The silicone mesh tube has good flexibility and resistance to high and low temperatures, and can withstand the flow of high and low temperature gases in the through-pipe 3 as well as a certain gas pressure. In addition, the mesh structure enhances the strength, making it less prone to damage, ensuring smooth airflow and reducing gas leakage.

[0054] It is worth noting that the outer diameter of the first connecting pipe 23 and the second connecting pipe 41 matches the inner diameter of the silicone mesh tube, so that the first connecting pipe 23 and the second connecting pipe 41 can be inserted into the silicone mesh tube, thereby forming a tight connection, ensuring the sealing of the joint and reducing air leakage.

[0055] In this embodiment, the pressure balancing structure also includes a controller, which is communicatively connected to the bidirectional two-way valve 1. The controller is used to open the bidirectional two-way valve 1 at a first preset time and close it at a second preset time. The controller of the pressure balancing structure communicates with the bidirectional two-way valve 1 and can automatically open and close the valve 1 at preset times, precisely controlling the timing and duration of pressure balancing, reducing ineffective gas exchange, preventing frost formation at the cold zone vent and on the evaporator, ensuring the evaporator's cooling capacity, and significantly increasing the number of consecutive impacts of the temperature shock test device.

[0056] It is worth noting that the first preset time is when the hot zone heats up and the cold zone cools down during the first start-up, the process of the mobile vehicle switching between the cold and hot zones, and the period before and after that. The second preset time is when each single temperature shock test is completed, at which time the pressure in the cold and hot zones is roughly balanced.

[0057] In addition, it is worth noting that temperature shock tests usually consist of multiple individual temperature shock tests.

[0058] Specifically, the general steps for using a temperature shock testing device are as follows:

[0059] (1) When the machine is turned on for the first time, the controller controls the two-way valve 1 to open. After the cold zone cools down to the set temperature and the hot zone heats up to the set temperature, the controller controls the two-way valve 1 to close.

[0060] (2) The mobile vehicle stays in the cold or hot zone for a set time, such as 30 minutes.

[0061] (3) When conducting the temperature shock test, the controller controls the two-way valve 1 to open two minutes in advance; when the moving vehicle switches between the cold zone and the hot zone, the two-way valve 1 remains open; after the temperature shock test ends, the controller controls the two-way valve 1 to close one minute later.

[0062] After the temperature shock test is completed, the pressure in the cold and hot zones is roughly balanced, and it is not necessary to connect the cold and hot zones to balance the pressure on both sides. In addition, during the temperature stabilization test, the two-way valve 1 is in the closed state, thereby restricting the airflow in the cold and hot zones and reducing frost formation at the vent in the cold zone or on the evaporator.

[0063] (4) Repeat steps (2) and (3) above for each subsequent single temperature shock test.

[0064] 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. Pressure equalization structure, characterized in that, The test chamber includes a two-way valve (1) and two pipe assemblies for conducting air. The two ends of the two-way valve (1) are respectively sealed and connected to the two first ends of the two pipe assemblies. The two second ends of the two pipe assemblies are respectively sealed and connected to the vent holes of the cold zone and the hot zone on the temperature shock test chamber. When the two-way valve (1) is open, the two pipe assemblies are connected to form a connecting channel, and the air in the cold zone and the hot zone can flow freely in the connecting channel to balance the pressure between the cold zone and the hot zone. When the two-way valve (1) is closed, the connecting channel is disconnected, and the air flow between the cold zone and the hot zone is blocked to maintain the temperature environment of the cold zone and the hot zone.

2. The pressure equalizing structure according to claim 1, characterized by Both of the pipe assemblies include a first connecting part (2), a through pipe (3), and a second connecting part (4). The two ends of the bidirectional two-way valve (1) are respectively connected to the first ends of the two first connecting parts (2); the second ends of the two first connecting parts (2) are respectively connected to the first ends of the two through pipes (3); the second ends of the two through pipes (3) are respectively connected to the first ends of the two second connecting parts (4); and the second ends of the two second connecting parts (4) can be respectively connected to the vent of the cold zone and the vent of the hot zone.

3. The pressure equalizing structure according to claim 2, characterized by The first connecting part (2) includes a one-way external threaded tube (21), a first connecting flange (22) and a first connecting pipe (23). The first end of the one-way external threaded tube (21) is provided with an external thread, and the two-way valve (1) is provided with an internal thread that mates with the external thread. The first end of the one-way external threaded tube (21) is threadedly connected to one end of the two-way valve (1). The two sides of the first connecting flange (22) are fixedly connected to the second end of the one-way external threaded tube (21) and the first connecting pipe (23) respectively. The first connecting pipe (23) is inserted into the first end of the corresponding connecting pipe (3).

4. The pressure equalizing structure according to claim 3, characterized by The unidirectional external threaded tube (21), the first connecting flange (22), and the first connecting pipe (23) are all made of stainless steel.

5. The pressure balancing structure according to claim 3, characterized in that, The two sides of the first connecting flange (22) are fixedly connected to the second end of the unidirectional external threaded tube (21) and the first connecting tube (23) by welding.

6. The pressure equalizing structure according to any one of claims 2 to 5, characterized by, The second connecting part (4) includes a second connecting pipe (41), a bend (42) and a second connecting flange (43) connected in sequence. The second connecting pipe (41) is inserted into the second end of the corresponding through pipe (3). The second connecting flange (43) is sealed to the corresponding vent of the temperature shock test chamber so that the bend (42) can communicate with the cold zone or the hot zone through the vent.

7. The pressure equalizing structure according to claim 6, characterized by The second connecting pipe (41), the bend (42) and the second connecting flange (43) are all made of stainless steel.

8. The pressure equalizing structure according to any one of claims 2 to 5, characterized by, The through tube (3) is a silicone mesh tube.

9. The pressure equalizing structure according to any one of claims 1 to 5, characterized by, The pressure balancing structure also includes a controller, which is communicatively connected to the two-way valve (1). The controller is configured to open the two-way valve (1) at a first preset time and close the two-way valve (1) at a second preset time.

10. Temperature shock test apparatus characterized in that, The invention includes a temperature shock test chamber and a pressure balancing structure as described in any one of claims 1-9, wherein the temperature shock test chamber is provided with a cold zone and a hot zone, and the pressure balancing structure is configured to balance the pressure between the cold zone and the hot zone within a preset time.

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