A bidirectional valve and explosion-proof valve

Abstract

This utility model relates to the field of valve technology, and in particular to a bidirectional valve and an explosion-proof valve. The bidirectional valve provided by this utility model includes a housing and a fixed base fixedly connected to one end of the housing. The inner wall of the housing and the housing together form a ventilation channel. A first through hole is provided on the fixed base, and a second through hole is provided on the housing corresponding to the first through hole. A flexible member abuts against the first through hole, and a first deformation space is provided between the flexible member and the second through hole. At least three sets of slits are evenly distributed circumferentially on the flexible member, and the slits are spaced apart from the first through hole in the radial direction of the bidirectional valve. The first through hole and the second through hole are correspondingly arranged. The flexible member is disposed between the first through hole and the second through hole, and the abutment between the flexible member and the first through hole forms an initial seal to prevent misflow when there is no pressure difference. Compared with complex bidirectional valves with many components, this eliminates components such as valve cores and springs, reduces assembly steps and potential failure points, and improves overall stability.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a two-way valve and an explosion-proof valve. Background Technology

[0002] In the field of new energy batteries and energy storage equipment, the enclosures of battery packs and energy storage devices must meet the requirements of a completely sealed design to prevent damage from external dust, liquids, and other impurities. However, temperature changes occur during the charging and discharging of battery cells, causing the gas inside the enclosure to expand and contract, resulting in an imbalance of pressure between the inside and outside of the enclosure. Long-term pressure difference can damage the sealing performance of the enclosure, so a pressure difference balancing mechanism is required.

[0003] Existing differential pressure balancing solutions on the market often require the integration of multiple independent valve cores, return springs, sealing gaskets, and other components in their airflow control structure to achieve airflow exchange. This results in a large number of components, a complex and cumbersome assembly process, and an increase in the number of components can easily lead to more points of failure. A problem with any component can cause airflow control to fail. Utility Model Content To address the problem of complex airflow control structures in existing bidirectional valves, this invention provides a bidirectional valve and an explosion-proof valve.

[0004] The present invention provides a bidirectional valve, comprising a housing and a fixed base fixedly connected to one end of the housing. The inner wall of the housing and the housing together form a ventilation channel. The fixed base is provided with a first through hole, and the housing is provided with a second through hole corresponding to the first through hole. The bidirectional valve includes a flexible member disposed between the first through hole and the second through hole. The flexible member abuts against the first through hole, and a first deformation space is provided between the flexible member and the second through hole. The flexible member has at least three sets of slits evenly distributed circumferentially, and the slits and the first through hole are spaced apart in the radial direction of the bidirectional valve.

[0005] Preferably, the flexible component includes a first deformation region corresponding to the first through hole. When the bidirectional valve intakes air through the first through hole, the first deformation region is displaced toward the first deformation space, and the cut is connected to the first through hole.

[0006] Preferably, a step is provided on the inner wall of the housing, and the top surface of the flexible element abuts against the step.

[0007] Preferably, the fixing base includes a boss disposed in the ventilation channel and abutting against the flexible member, and a second deformation space is provided between the side wall of the boss and the inner wall of the housing.

[0008] Preferably, the flexible component includes a second deformation region corresponding to the second deformation space. When the bidirectional valve introduces air through the second through hole, the second deformation region is displaced toward the second deformation space, and a gap is formed between the flexible component and the inner wall of the housing.

[0009] Preferably, the fixing base is provided with a fourth through hole corresponding to the second deformation space, and the first through hole and the fourth through hole are spaced apart.

[0010] Preferably, a third through hole is provided on the boss corresponding to the first through hole, and the third through hole communicates with the first through hole.

[0011] This utility model provides an explosion-proof valve, including a main body and a two-way valve as described above. The main body includes a cover rotatably connected to the main body. The main body is provided with a pressure relief channel, and the cover blocks the pressure relief channel. The cover is provided with a first vent hole, and the two-way valve is provided corresponding to the first vent hole.

[0012] Preferably, the cover is provided with a breathable component corresponding to the first ventilation hole.

[0013] Preferably, the main body includes a valve body rotatably connected to the cover, the pressure relief channel is disposed on the valve body, the first vent is disposed on the cover, the cover is provided with a second vent, and the first vent and the second vent are spaced apart on the cover.

[0014] Compared with the prior art, the bidirectional valve and explosion-proof valve provided by this utility model have the following advantages: 1. The bidirectional valve provided in this embodiment of the utility model has a housing and a fixed base forming an air exchange channel, providing a directional flow path for airflow. The fixed connection between the fixed base and the housing ensures the overall sealing of the bidirectional valve and avoids airflow leakage. The first through hole and the second through hole are correspondingly arranged, and the flexible part is arranged between the first through hole and the second through hole. The flexible part abuts against the first through hole to form an initial seal, preventing misflow when there is no pressure difference. Compared with complex bidirectional valves with more components, it eliminates components such as valve cores and springs, reduces assembly steps and failure points, and improves overall stability. The flexible part has multiple cuts evenly distributed around its circumference. The cuts can undergo natural deformation when subjected to force, connecting the first through hole and the second through hole. There is no need for a complex transmission structure, and the response is more sensitive. The threshold of gas passage can also be adjusted by the number and size of the cuts to adapt to different pressure requirements. The cuts and the first through hole are arranged radially at intervals, so that the sealing area where the flexible part abuts against the first through hole and the deformation area where the cut is located are independent of each other, avoiding the failure of the initial seal caused by the cut directly corresponding to the first through hole.

[0015] 2. The bidirectional valve provided in this embodiment of the utility model has a first deformation area corresponding to the first through hole to receive the intake pressure. The pressure only acts on the first deformation area that needs to be deformed. When the airflow enters from the first through hole, the first deformation area is displaced to the first deformation space. Therefore, a raised space is formed between the flexible part and the first through hole. The cut is connected to the first through hole and the second through hole with the deformation. The airflow channel can be opened without additional transmission parts. While simplifying the structure, it also makes the airflow response faster and reduces pressure loss.

[0016] 3. In the bidirectional valve provided in this embodiment of the utility model, the step provides a positioning reference for the flexible component, forming effective support and limiting for the flexible component. When the flexible component is deformed in the first deformation area due to airflow pressure, the step can limit the displacement of the flexible component. When there is no airflow or the airflow pressure is insufficient, it helps the flexible component maintain the initial sealing state, ensuring the sealing reliability of the bidirectional valve.

[0017] 4. In the bidirectional valve provided in this embodiment, the boss on the fixed seat abuts against the flexible part, providing support for the flexible part, ensuring the initial position of the flexible part is accurate, and ensuring the sealing reliability when there is no airflow or insufficient airflow pressure. A second deformation space is formed between the side wall of the boss and the inner wall of the housing. When the flexible part deforms under the airflow pressure from the second through hole, it provides sufficient deformation margin for the flexible part, ensuring that the airflow channel can be smoothly connected.

[0018] 5. In the embodiment of this utility model, when the two-way valve introduces air through the second through hole, the second deformation area of ​​the flexible member is displaced to the second deformation space. The second deformation area is located at the end of the flexible member. Therefore, during the displacement of the second deformation area, a gap is generated between the flexible member and the inner wall of the housing. The gap connects the first deformation space and the second deformation space, allowing the airflow to pass smoothly. This enables the airflow to enter the ventilation channel from the second through hole, simplifies the air path control structure, and improves the flexibility and reliability of airflow control.

[0019] 6. In the bidirectional valve provided in this embodiment of the utility model, the fourth through hole and the first through hole on the fixed base are spaced apart, so that the first through hole and the fourth through hole each form an independent airflow channel. When air enters from the first through hole, the airflow pushes the first deformation area of ​​the flexible member to move, so that the cut is connected with the first through hole, and the airflow enters the first deformation space and is smoothly discharged through the second through hole. When air enters from the second through hole, the airflow pushes the second deformation area of ​​the flexible member to move, so that a gap is formed between the flexible member and the inner wall of the shell, and the gap is connected to the second deformation space. The airflow exits from the fourth through hole through the second deformation space.

[0020] 7. The bidirectional valve provided in this embodiment of the utility model has a third through hole on the boss corresponding to the first through hole, and the first through hole and the third through hole are connected. This provides a direct and smooth channel for the airflow entering from the first through hole, so that the airflow can quickly pass through the boss and quickly drive the first deformation area of ​​the flexible part, reduce the stagnation and resistance of the airflow at the boss, and improve the airflow transmission efficiency.

[0021] 8. The second embodiment of this utility model provides an explosion-proof valve. The main body is the basic structure of the explosion-proof valve, providing installation support for the cover and the two-way valve. The rotatable cover normally blocks the pressure relief channel, forming a seal. When one side is overpressurized, the cover rotates to open the pressure relief channel, providing a path for the overpressurized gas to escape, preventing excessive pressure from causing danger, and achieving a safe pressure relief function. The first vent is correspondingly set with the two-way valve, allowing the two-way valve to exchange airflow with the external environment through the first vent. This maintains normal air pressure balance and prevents excessive moisture from being introduced during air intake. The cover and the two-way valve work together to take into account both explosion-proof pressure relief and ventilation functions, improving the safety and reliability of the explosion-proof valve.

[0022] 8. The two-way valve provided in this embodiment of the utility model has a ventilated component on the cover that works in conjunction with the first vent of the valve body to improve gas exchange efficiency. The ventilated component adopts a porous structure to allow air to pass through, and works in conjunction with the first vent to ensure normal ventilation and maintain air pressure balance. At the same time, the ventilated component has waterproof properties to block water vapor and liquid intrusion, and avoid condensation inside the box or damage to components due to moisture.

[0023] 10. In the embodiment of this utility model, the explosion-proof valve has a rotating connection between the valve body and the cover to ensure that the pressure relief channel can be opened and closed flexibly. The first vent and the second vent are spaced apart on the valve body to separate the bidirectional valve venting and pressure relief airflow paths and avoid mutual interference. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional model schematic diagram of the bidirectional valve provided in the first embodiment of this utility model.

[0026] Figure 2 This is an exploded schematic diagram of the bidirectional valve provided in the first embodiment of this utility model.

[0027] Figure 3 This is a cross-sectional schematic diagram of the bidirectional valve provided in the first embodiment of this utility model.

[0028] Figure 4 This is a cross-sectional schematic diagram of the two-way valve in air intake state one provided in the first embodiment of this utility model.

[0029] Figure 5 This is a cross-sectional schematic diagram of the two-way valve in intake state two provided in the first embodiment of this utility model.

[0030] Figure 6 This is a schematic diagram of a three-dimensional model of the explosion-proof valve in the open state provided in the second embodiment of this utility model.

[0031] Figure 7 This is a cross-sectional schematic diagram of the explosion-proof valve in the open state provided in the second embodiment of this utility model.

[0032] Explanation of reference numerals in the attached diagram: 100. Two-way valve; 200. Explosion-proof valve; 201. Main body; 202. Pressure relief channel; 1. Housing; 2. Mounting base; 3. Flexible component; 4. Cover; 5. Valve body; 10. Ventilation passage; 11. Second through hole; 12. First deformation space; 13. Second deformation space; 14. Step; 15. Gap; 21. First through hole; 22. Boss; 23. Fourth through hole; 31. Cutout; 32. First deformation area; 33. Second deformation area; 34. Top surface; 35. Bottom surface; 41. Ventilation component; 42. First ventilation hole; 43. Second ventilation hole; 44. Rotating shaft; 45. Torsion spring; 221. Third through hole. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0036] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0037] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0038] See Figures 1-2 The first embodiment of this utility model provides a two-way valve 100. The two-way valve 100 includes a housing 1 and a fixed seat 2 fixedly connected to one end of the housing 1. The inner wall of the housing 1 and the housing 1 together form a ventilation channel 10. The fixed seat 2 is provided with a first through hole 21, and the housing 1 is provided with a second through hole 11 corresponding to the first through hole 21. The two-way valve 100 includes a flexible member 3 disposed between the first through hole 21 and the second through hole 11. The flexible member 3 abuts against the first through hole 21. A first deformation space 12 is provided between the flexible member 3 and the second through hole 11. At least three sets of cuts 31 are evenly distributed in the circumference of the flexible member 3, and the cuts 31 and the first through hole 21 are spaced apart in the radial direction of the two-way valve 100.

[0039] Understandably, the housing 1 and the fixed base 2 together form a ventilation channel 10, providing a basic space for gas exchange. The first through hole 21 of the fixed base 2 and the second through hole 11 of the housing 1 serve as the two ends of the gas inlet and outlet, respectively, forming the basic path for the gas outlet of the two-way valve 100. Compared with the conventional complex structure of the two-way valve 100 on the market, the two-way valve 100 provided in this application uses the flexible member 3 as the core component. With the first deformation space 12 between the flexible member 3 and the second through hole 11, the flexible member 3 can be precisely deformed when subjected to force, and quickly conduct the first through hole 21 and the second through hole 11 without the need for complex transmission components such as valve core and spring.

[0040] Specifically, the flexible element 3 is disposed between the first through hole 21 and the second through hole 11. Under pressure equilibrium, the flexible element 3 abuts against the first through hole 21 to seal the first through hole 21. The circumferentially distributed cuts 31 and the radial spacing between the flexible element 3 and the first through hole 21 ensure the reliability of the initial seal, avoid leakage caused by direct penetration of the sealing surface, and make the deformation response more sensitive, adapting to the gas exchange requirements under different pressures.

[0041] Understandably, the entire bidirectional valve 100 structure reduces friction and fit errors between components, lowers airflow resistance, and improves ventilation efficiency; at the same time, due to the simplification of components, the number of failure points is reduced, significantly improving sealing reliability and service life.

[0042] Further, see Figures 3-5 The flexible component 3 includes a first deformation region 32 corresponding to the first through hole 21. When the two-way valve 100 takes in air through the first through hole 21, the first deformation region 32 moves toward the first deformation space 12, and the cut 31 communicates with the first through hole 21.

[0043] Understandably, the first deformation area 32 is set to correspond to the first through hole 21. The gas pressure entering from the first through hole 21 is precisely applied to the first deformation area 32 that needs to be deformed, so as to avoid the overall disorderly deformation of the flexible part 3 and ensure that the deformation direction and amplitude are controllable.

[0044] Specifically, when air enters through the first through hole 21, the first deformation area 32 moves toward the first deformation space 12, and the first deformation space 12 provides sufficient deformation allowance for the flexible part 3. The cut 31 opens with the gas pressure and deformation and connects with the first through hole 21 to form a smooth airflow channel.

[0045] Furthermore, the mounting base 2 includes a boss 22 disposed within the ventilation channel 10 and abutting against the flexible member 3.

[0046] It should be noted that the bottom surface 35 of the flexible component 3 abuts against the boss 22, the first deformation space 12 is disposed between the top surface 34 of the flexible component 3 and the second through hole 11, and the radial projection area of ​​the first deformation space 12 is greater than the radial projection area of ​​the first through hole 21.

[0047] Specifically, the projected area of ​​the first deformation space 12 is larger than that of the first through hole 21, and the bottom surface 35 of the flexible member 3 is supported by the boss 22. The top surface 34 of the flexible member 3 and the second through hole 11 reserve the first deformation space 12.

[0048] When air enters through the first through hole 21, the gas pressure acts on the first deformation area 32 of the flexible member 3 corresponding to the first through hole 21. Since the first deformation space 12 of the top surface 34 is sufficient and has a larger area, the flexible member 3 can deform upward, so that the cut 31 is connected to the first through hole 21. The gas flows through the first deformation space 12 to the second through hole 11, realizing forward conduction.

[0049] When air enters through the second through hole 11, the gas pressure acts on the top surface 34 of the flexible member 3. At this time, the bottom surface 35 of the flexible member 3 is rigidly supported by the boss 22, and the area of ​​the top surface 34 of the flexible member 3 subjected to gas pressure is greater than the sealing area of ​​the bottom surface 35 in contact with the boss 22. The pressure difference will force the flexible member 3 to press more tightly against the boss 22, strengthening the seal of the flexible member 3 on the first through hole 21. The cut 31 cannot be opened, thereby blocking the reverse airflow and achieving a one-sided ventilation effect where air can only be discharged from the first through hole 21 to the second through hole 11, and the other side is blocked.

[0050] Furthermore, a second deformation space 13 is provided between the side wall of the boss 22 and the inner wall of the shell 1.

[0051] Furthermore, the flexible component 3 includes a second deformation region 33 corresponding to the second deformation space 13. When the two-way valve 100 intakes air through the second through hole 11, the second deformation region 33 is displaced toward the second deformation space 13, and a gap 15 is formed between the flexible component 3 and the inner wall of the housing 1.

[0052] Understandably, the second deformation space 13 between the side wall of the boss 22 and the inner wall of the housing 1 provides a deformation area for the second deformation region 33 of the flexible member 3, bearing the pressure when air enters through the second through hole 11, ensuring that the deformation direction and range are controllable, and avoiding interference with the housing 1 and the boss 22 during deformation. When air enters through the second through hole 11, relying on the elasticity of the second deformation region 33 of the flexible member 3, air can enter from one side of the second through hole 11 without the need for an additional valve core or transmission component, simplifying the structure and reducing the risk of failure. Specifically, when air enters through the second through hole 11, the second deformation area 33 moves to the second deformation space 13, so that the flexible part 3 and the inner wall of the housing 1 form a gap 15. The gap 15 is a channel for reverse airflow when air enters through the second through hole 11, allowing the gas to bypass the sealing area of ​​the first through hole 21, realizing reverse airflow from the second through hole 11 to the gap 15, so that the two-way valve 100 has a two-way air exchange function.

[0053] It should be noted that the second deformation space 13 is arranged radially at a distance from the first through hole 21.

[0054] Understandably, the second deformation space 13 and the first through hole 21 are arranged radially apart to achieve physical isolation between the two airflow channels, namely, air intake from the second through hole 11 and air intake from the first through hole 21, so as to avoid airflow cross-flow.

[0055] When air enters through the first through-hole 21, the airflow only acts on the corresponding first deformation region 32 and cannot affect the second deformation region 33.

[0056] When air enters through the second through hole 11, the gas pressure can fully act on the second deformation area 33, and only on the second deformation area 33. The cut 31 on the flexible part 3 cannot connect with the first through hole 21, and the second deformation space 13 provides sufficient deformation margin, so that the second deformation area 33 deforms and shifts into the second deformation space 13, forming a gap 15 with the inner wall of the shell 1 to conduct airflow. Furthermore, when air enters through the second through hole 11, the gas cannot flow through the second through hole 11 to the first through hole 21: the first deformation area 32 of the flexible part 3 is supported by the boss 22, and has no corresponding deformation space. The pressure cannot push it to deform in the direction of the first through hole 21, and the cut 31 cannot connect with the second through hole 11, ensuring that reverse air intake will not mix into the forward channel, making the air intake path and the air exhaust path independent, and achieving precise unilateral ventilation control.

[0057] Furthermore, a step 14 is provided on the inner wall of the housing 1, and the top surface 34 of the flexible member 3 abuts against the step 14.

[0058] Understandably, step 14 abuts against the top surface 34 of flexible component 3, and boss 22 abuts against the ground surface of flexible component 3. Under the condition of air pressure balance, flexible component 3 simultaneously seals the first through hole 21 and the second through hole 11, enhancing the initial sealing performance under air pressure balance and preventing gas leakage when there is no pressure difference.

[0059] Furthermore, step 14 restricts the possibility of deformation of the second deformation area 33 of the flexible component 3 toward the second through hole 11, forcing the second deformation area 33 to deform only toward the lower second deformation space 13 and form a gap 15 with the inner wall of the shell, forming a specific gas flow channel, and avoiding disordered deformation that leads to chaotic gas paths.

[0060] Furthermore, a fourth through hole 23 is provided on the fixed base 2 corresponding to the second deformation space 13, and the first through hole 21 and the fourth through hole 23 are spaced apart.

[0061] Furthermore, step 14 is provided corresponding to the second deformation space 13, and the second deformation space 13 is provided on one side of the bottom surface 35 of the flexible member 3 and communicates with the fourth through hole 23.

[0062] Understandably, the fourth through hole 23 is the outlet of the airflow. After communicating with the second deformation space 13, it provides an exhaust channel for the gas entering from the second through hole 11. The fourth through hole 23 is spaced apart from the first through hole 21 to prevent cross-flow of airflow entering the ventilation channel 10 from different directions.

[0063] Specifically, when air enters through the fourth through hole 23, the gas pressure acts on the second deformation region 33 of the flexible member 3. The top surface 34 of the second deformation region 33 is fixed by the step 14. The rigid limit of the step 14 prevents the second deformation region 33 from deforming in the opposite direction and prevents the second deformation region 33 from connecting with the second through hole 11.

[0064] Furthermore, a third through hole 221 is provided on the boss 22 corresponding to the first through hole 21, and the third through hole 221 is connected to the first through hole 21.

[0065] Understandably, the third through hole 221 is provided on the boss 22 and communicates with the first through hole 21, extending and optimizing the airflow path entering from the first through hole 21, enhancing the directional airflow conduction efficiency. The third through hole 221 is the direct point of action of the airflow pressure on the first deformation area 32, making the intake pressure more concentrated to drive the deformation of the flexible part 3 and improve the conduction response speed.

[0066] Preferably, the radial diameter of the first through hole 21 is less than or equal to the radial diameter of the third through hole 221. The third through hole 221 concentrates the airflow, which is then directed to the first deformation region 32 of the flexible component 3, making the pressure more focused and ensuring that the flexible component 3 deforms quickly and stably.

[0067] In this embodiment, the bidirectional valve 100 achieves automatic bidirectional airflow conduction and sealing without complex structure through the elastic deformation of the flexible component 3 and the cutout 31, balancing response sensitivity and structural simplicity, and reducing failure risk and manufacturing cost.

[0068] Specifically, the flexible component 3 is made of a flexible material that is elastic, sealing and weather resistant, and the shell 1 is set in the shape of a cylinder, square or other shape to adapt to form a hollow ventilation channel 10. The inner wall of the shell 1 is smooth to reduce airflow resistance.

[0069] As a non-limiting specific embodiment, the housing 1 and the fixing base 2 are fixedly connected by ultrasonic welding. They can also be fixedly connected by threaded connection, snap-fit ​​connection or other methods. No specific limitation is made in this application.

[0070] It should be noted that in this application, the first through hole 21 can be connected to the interior of the element to be sealed, and the second through hole 11 can be connected to the external environment; alternatively, the second through hole 11 can be connected to the interior of the element to be sealed, and the first through hole 21 can be connected to the external environment. In this application, the specific direction and position of the first through hole 21 and the second through hole 11 are not limited. Therefore, descriptions such as "air inlet" or "air outlet" for the first through hole 21, the second through hole 11, or the third through hole 221 are for illustrative purposes only and do not represent a specific limitation on the direction of gas entry and exit. Figure 4 and Figure 5 The arrows shown indicate the direction of air flow in ventilation channel 10.

[0071] See Figures 6-7 The second embodiment of this utility model provides an explosion-proof valve 200, including a main body 201 and a two-way valve 100 provided in the first embodiment. The main body 201 includes a cover 4 rotatably connected to the main body 201. The main body 201 is provided with a pressure relief channel 202, and the cover 4 blocks the pressure relief channel 202. The cover 4 is provided with a first ventilation hole 42, and the two-way valve 100 is provided corresponding to the first ventilation hole 42.

[0072] Understandably, the main body 201 is the supporting frame of the explosion-proof valve 200, integrates various functional components and provides an installation base. The cover 4 controls the opening and closing of the pressure relief channel 202 by rotation. When there is overpressure, the cover 4 automatically opens to relieve pressure, and after balance, it resets and seals the pressure relief channel 202.

[0073] When a battery cell malfunctions, it will rapidly generate a large amount of harmful gas. If the pressure inside the sealed enclosure exceeds the capacity of the enclosure material, it may cause dangerous events such as explosion and combustion. The pressure relief channel 202 provides a rapid discharge path for the high-pressure harmful gas to prevent the main body 201 from being damaged by overpressure. The first ventilation port 42 connects the two-way valve 100 to the external environment to achieve two-way pressure balance under normal operating conditions and prevent abnormalities caused by excessive pressure difference between the inside and outside.

[0074] Furthermore, the two-way valve 100 is fixedly connected to the first vent 42.

[0075] Specifically, fastening or threaded connection can be used for fixing. In this embodiment, the connection method between the two-way valve 100 and the cover 4 is not specifically limited.

[0076] Furthermore, the cover 4 is provided with a ventilation component 41 corresponding to the first ventilation hole 42.

[0077] Understandably, when the cover 4 blocks the pressure relief channel 202, the ventilated component 41 ensures gas exchange between the first vent 42 and the external environment, ensuring that the two-way valve 100 can achieve normal air pressure balance through the first vent 42, preventing external impurities, dust and liquids from entering the explosion-proof valve 200 through the first vent 42, playing a protective filtering role, and taking into account both ventilation and sealing.

[0078] Specifically, the breathable component 41 can adopt a composite structure of metal mesh and breathable membrane. The metal mesh is set as a ring and adapted to the first ventilation hole 42. The metal mesh is detachably connected to the mounting groove of the cover 4 through buckles, which provides structural support and facilitates later maintenance and replacement.

[0079] The breathable membrane is made of porous waterproof and breathable material and is attached to the inside of the metal mesh. It allows gas molecules to pass through while blocking liquid water and particles. The cover 4 is provided with an annular protrusion 22 corresponding to the breathable component 41. It cooperates with the groove on the edge of the breathable component 41 to form a seal and prevent unfiltered gas from seeping in through the gap 15.

[0080] Furthermore, the main body 201 includes a valve body 5 rotatably connected to the cover 4, a pressure relief channel 202 is provided on the valve body 5, a first vent 42 is provided on the cover 4, and a second vent 43 is provided on the cover 4. The first vent 42 and the second vent 43 are spaced apart on the cover 4.

[0081] Understandably, the valve body 5 supports the cover 4 and provides a pressure relief reference. The cover 4 provides an installation reference for the two-way valve 100. The pressure relief channel 202 is separated from the pressure-balanced airflow path by the first vent 42 and the second vent 43 spaced apart on the cover 4, ensuring that the pressure relief and ventilation functions operate independently.

[0082] Specifically, the valve body 5 is disc-shaped, and a rotating shaft 44 is provided on the top of the valve body 5. It is rotatably connected to the cover 4 via a torsion spring 45. The cover 4 is fan-shaped, and the edge of the cover 4 facing the valve body 5 is fitted and sealed to the valve body 5. The second vent 43 is provided at the end of the cover 4 away from the rotating shaft 44, and is radially offset from the first vent 42 along the cover 4 to improve the air pressure balance efficiency. The cover 4 switches states by rotation. Normally, it seals the pressure relief channel 202, and opens to relieve pressure when there is overpressure.

[0083] The valve body 5 adopts a cylindrical hollow structure. The inner wall of the valve body 5 is provided with an annular step 14 for the cover 4 to limit the position. The outer side of the valve body 5 is provided with a flange for easy connection with the equipment. The edge of the cover 4 is embedded with a high-temperature resistant sealing gasket, which forms a line seal with the port of the pressure relief channel 202.

[0084] When the pressure relief channel 202 is opened, the cover 4 rotates outward around the valve body 5, forming an angle of 30°-60° with the valve body 5, and the pressure relief channel 202 is fully exposed; at this time, the two-way valve 100 and the venting component 41 rotate synchronously with the cover 4, without affecting the gas discharge of the pressure relief channel 202, ensuring the rapid release of high-pressure airflow.

[0085] Compared with the prior art, the bidirectional valve and explosion-proof valve provided by this utility model have the following advantages: 1. The bidirectional valve provided in this embodiment of the utility model has a housing and a fixed base forming an air exchange channel, providing a directional flow path for airflow. The fixed connection between the fixed base and the housing ensures the overall sealing of the bidirectional valve and avoids airflow leakage. The first through hole and the second through hole are correspondingly arranged, and the flexible part is arranged between the first through hole and the second through hole. The flexible part abuts against the first through hole to form an initial seal, preventing misflow when there is no pressure difference. Compared with complex bidirectional valves with more components, it eliminates components such as valve cores and springs, reduces assembly steps and failure points, and improves overall stability. The flexible part has multiple cuts evenly distributed around its circumference. The cuts can undergo natural deformation when subjected to force, connecting the first through hole and the second through hole. There is no need for a complex transmission structure, and the response is more sensitive. The threshold of gas passage can also be adjusted by the number and size of the cuts to adapt to different pressure requirements. The cuts and the first through hole are arranged radially at intervals, so that the sealing area where the flexible part abuts against the first through hole and the deformation area where the cut is located are independent of each other, avoiding the failure of the initial seal caused by the cut directly corresponding to the first through hole.

[0086] 2. The bidirectional valve provided in this embodiment of the utility model has a first deformation area corresponding to the first through hole to receive the intake pressure. The pressure only acts on the first deformation area that needs to be deformed. When the airflow enters from the first through hole, the first deformation area is displaced to the first deformation space. Therefore, a raised space is formed between the flexible part and the first through hole. The cut is connected to the first through hole and the second through hole with the deformation. The airflow channel can be opened without additional transmission parts. While simplifying the structure, it also makes the airflow response faster and reduces pressure loss.

[0087] 3. In the bidirectional valve provided in this embodiment of the utility model, the step provides a positioning reference for the flexible component, forming effective support and limiting for the flexible component. When the flexible component is deformed in the first deformation area due to airflow pressure, the step can limit the displacement of the flexible component. When there is no airflow or the airflow pressure is insufficient, it helps the flexible component maintain the initial sealing state, ensuring the sealing reliability of the bidirectional valve.

[0088] 4. In the bidirectional valve provided in this embodiment, the boss on the fixed seat abuts against the flexible part, providing support for the flexible part, ensuring the initial position of the flexible part is accurate, and ensuring the sealing reliability when there is no airflow or insufficient airflow pressure. A second deformation space is formed between the side wall of the boss and the inner wall of the housing. When the flexible part deforms under the airflow pressure from the second through hole, it provides sufficient deformation margin for the flexible part, ensuring that the airflow channel can be smoothly connected.

[0089] 5. In the embodiment of this utility model, when the two-way valve introduces air through the second through hole, the second deformation area of ​​the flexible member is displaced to the second deformation space. The second deformation area is located at the end of the flexible member. Therefore, during the displacement of the second deformation area, a gap is generated between the flexible member and the inner wall of the housing. The gap connects the first deformation space and the second deformation space, allowing the airflow to pass smoothly. This enables the airflow to enter the ventilation channel from the second through hole, simplifies the air path control structure, and improves the flexibility and reliability of airflow control.

[0090] 6. In the bidirectional valve provided in this embodiment of the utility model, the fourth through hole and the first through hole on the fixed base are spaced apart, so that the first through hole and the fourth through hole each form an independent airflow channel. When air enters from the first through hole, the airflow pushes the first deformation area of ​​the flexible member to move, so that the cut is connected with the first through hole, and the airflow enters the first deformation space and is smoothly discharged through the second through hole. When air enters from the second through hole, the airflow pushes the second deformation area of ​​the flexible member to move, so that a gap is formed between the flexible member and the inner wall of the shell, and the gap is connected to the second deformation space. The airflow exits from the fourth through hole through the second deformation space.

[0091] 7. The bidirectional valve provided in this embodiment of the utility model has a third through hole on the boss corresponding to the first through hole, and the first through hole and the third through hole are connected. This provides a direct and smooth channel for the airflow entering from the first through hole, so that the airflow can quickly pass through the boss and quickly drive the first deformation area of ​​the flexible part, reduce the stagnation and resistance of the airflow at the boss, and improve the airflow transmission efficiency.

[0092] 8. The second embodiment of this utility model provides an explosion-proof valve. The main body is the basic structure of the explosion-proof valve, providing installation support for the cover and the two-way valve. The rotatable cover normally blocks the pressure relief channel, forming a seal. When one side is overpressurized, the cover rotates to open the pressure relief channel, providing a path for the overpressurized gas to escape, preventing excessive pressure from causing danger, and achieving a safe pressure relief function. The first vent is correspondingly set with the two-way valve, allowing the two-way valve to exchange airflow with the external environment through the first vent. This maintains normal air pressure balance and prevents excessive moisture from being introduced during air intake. The cover and the two-way valve work together to take into account both explosion-proof pressure relief and ventilation functions, improving the safety and reliability of the explosion-proof valve.

[0093] 8. The two-way valve provided in this embodiment of the utility model has a ventilated component on the cover that works in conjunction with the first vent of the valve body to enhance gas exchange efficiency. The ventilated component adopts a porous structure to allow air to pass through, and works in conjunction with the first vent to ensure normal ventilation and maintain air pressure balance. At the same time, the ventilated component has waterproof properties to block water vapor and liquid intrusion, and avoid condensation inside the box or damage to components due to moisture.

[0094] 10. In the embodiment of this utility model, the explosion-proof valve has a rotating connection between the valve body and the cover to ensure that the pressure relief channel can be opened and closed flexibly. The first vent and the second vent are spaced apart on the valve body to separate the bidirectional valve venting and pressure relief airflow paths and avoid mutual interference.

[0095] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A two-way valve, characterized in that: The two-way valve includes a housing and a fixed base fixedly connected to one end of the housing. The inner wall of the housing and the housing together form an air exchange channel. The fixed base is provided with a first through hole, and the housing is provided with a second through hole corresponding to the first through hole. The bidirectional valve includes a flexible member disposed between the first through hole and the second through hole. The flexible member abuts against the first through hole, and a first deformation space is provided between the flexible member and the second through hole. The flexible member has at least three sets of slits evenly distributed in the circumferential direction, and the slits are spaced apart from the first through hole in the radial direction of the bidirectional valve.

2. The bidirectional valve as described in claim 1, characterized in that: The flexible component includes a first deformation region corresponding to the first through hole. When the bidirectional valve takes in air through the first through hole, the first deformation region is displaced to the first deformation space, and the cut is connected to the first through hole.

3. The bidirectional valve as described in claim 2, characterized in that: The inner wall of the housing is provided with a step, and the top surface of the flexible component abuts against the step.

4. The bidirectional valve as described in claim 3, characterized in that: The fixing base includes a boss disposed in the ventilation channel and abutting against the flexible member, and a second deformation space is provided between the side wall of the boss and the inner wall of the housing.

5. The bidirectional valve as described in claim 4, characterized in that: The flexible component includes a second deformation region corresponding to the second deformation space. When the bidirectional valve introduces air through the second through hole, the second deformation region is displaced toward the second deformation space, and a gap is formed between the flexible component and the inner wall of the housing.

6. The bidirectional valve as described in claim 5, characterized in that: The fixed base is provided with a fourth through hole corresponding to the second deformation space, and the first through hole and the fourth through hole are spaced apart.

7. The bidirectional valve as described in claim 4, characterized in that: A third through hole is provided on the boss corresponding to the first through hole, and the third through hole communicates with the first through hole.

8. An explosion-proof valve, characterized in that: The device includes a main body and a two-way valve as described in any one of claims 1-7. The main body includes a cover rotatably connected to the main body, and the main body is provided with a pressure relief channel. The cover covers the pressure relief channel. The cover is provided with a first vent hole, and the two-way valve is provided corresponding to the first vent hole.

9. The explosion-proof valve as described in claim 8, characterized in that: The cover is provided with a breathable component corresponding to the first ventilation hole.

10. The explosion-proof valve as described in claim 8, characterized in that: The main body includes a valve body rotatably connected to the cover, a pressure relief channel is provided on the valve body, a first vent is provided on the cover, and a second vent is provided on the cover, with the first vent and the second vent spaced apart on the cover.

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