Humidity control balance valve and sealing equipment

Abstract

The utility model relates to the technical field of balance valves, in particular to a humidity control balance valve and sealing equipment. The humidity control balance valve is arranged on the sealing box, a containing cavity is formed between the humidity control balance valve and the interior of the sealing box, the humidity control balance valve comprises a valve body and a ventilation mechanism, the ventilation mechanism comprises a valve deck, and the valve deck is movably arranged on the valve body; a first blocking wall is arranged on the side, facing the valve deck, of the valve body, a second blocking wall is arranged on the side, facing the first blocking wall, of the valve deck, and the first blocking wall and the second blocking wall are arranged in a spaced mode. A labyrinth channel is formed between the first retaining wall and the valve deck, between the second retaining wall and the valve body and between the first retaining wall and the second retaining wall, one end of the labyrinth channel is connected with the containing cavity, and the other end of the labyrinth channel is communicated with the outside atmosphere. The humidity control balance valve solves the technical problem that a traditional humidity control balance valve cannot effectively prevent water vapor in airflow from entering a sealed box body. The sealing equipment disclosed by the utility model has the same beneficial effects as a humidity control balance valve.

Description

[Technical field]

[0001] The utility model relates to the technical field of balancing valves, in particular to a moisture control balancing valve and a sealing device. [Background technology]

[0002] Moisture control balancing valves are mainly used in sealed boxes of automotive lights, power and energy storage batteries, communication equipment and other products to balance the pressure inside the sealed box with the external air pressure, and can further achieve functions such as waterproofing, breathability, drying and moisture absorption.

[0003] When the ambient temperature in the sealed box rises, due to thermal inertia, the temperature of the inner surface of the product shell will be lower than the ambient temperature. When the water vapor that enters the product encounters the product surface below the dew point, the water vapor will automatically condense to form dew droplets. This phenomenon is called "condensation".

[0004] "Condensation" may cause short circuit risk in the electronic components inside the product, which may cause circuit alarm failure at the least and may even cause the sealed box to catch fire or even explode at the worst. Therefore, it is necessary to install a humidity control balancing valve on the sealed box to balance the pressure difference between the inside and outside of the sealed box.

[0005] At present, the existing humidity control balancing valve is only provided with an eP TFE (expanded polytetrafluoroethylene) membrane, which can only prevent liquid water from entering the sealed box, but cannot prevent water vapor in the air flow, resulting in the above-mentioned "condensation" phenomenon in the sealed box. [Contents of the utility model]

[0006] In order to solve the technical problem that the traditional humidity control balancing valve cannot effectively prevent the water vapor in the air flow from entering the sealed box, the utility model provides a humidity control balancing valve and a sealing device.

[0007] The technical solution to the technical problem of the utility model is to provide a humidity control balancing valve, which is arranged on a sealed box, and a receiving cavity is formed between the humidity control balancing valve and the interior of the sealed box, and the humidity control balancing valve includes a valve body and a venting mechanism, and the venting mechanism includes a valve cover, and the valve cover is movably arranged on the valve body;

[0008] A first baffle wall is provided on a side of the valve body facing the valve cover, and a second baffle wall is provided on a side of the valve cover facing the first baffle wall, wherein the first baffle wall and the second baffle wall are spaced apart from each other;

[0009] A labyrinth passage is formed between the first baffle wall and the valve cover, the second baffle wall and the valve body, and the adjacent first baffle wall and the second baffle wall. One end of the labyrinth passage is connected to the accommodating cavity, and the other end is connected to the outside atmosphere.

[0010] Preferably, there is a first gap between the first baffle wall and the valve cover and between the second baffle wall and the valve body, and there is a second gap between adjacent first baffle walls and second baffle walls; the labyrinth channel is formed by the connection between the first gap and the second gap.

[0011] Preferably, the ventilation mechanism further comprises a waterproof breathable membrane and an end cover which can cover the valve body, the waterproof breathable membrane is located between the valve cover and the end cover, the end cover is farther away from the valve body than the valve cover; there is a gap between the end cover and the valve body.

[0012] Preferably, an air inlet is opened on the edge of the valve cover, one end of the air inlet is communicated with the maze channel, and the other end of the air inlet is communicated with the outside atmosphere after passing through the waterproof breathable membrane and the gap.

[0013] Preferably, a breathable member is installed on the side of the valve body facing the valve cover, and the breathable member is provided with air holes, and the air holes are connected to the maze channel; a first air permeable channel is provided through the valve body, and the first air permeable channel is connected to the maze channel through the air holes.

[0014] Preferably, a third baffle wall is provided on a side of the valve cover facing the air permeable member, and the height of the third baffle wall is smaller than the height of the second baffle wall; the air permeable member is a flexible member, and the third baffle wall is slidably connected to the valve body through the air permeable member.

[0015] Preferably, the humidity control balancing valve also includes a humidity control component, which is located on the side of the valve body away from the breathable mechanism; the humidity control component includes a bottom cover, a filter layer and an adsorption layer, the filter layer is arranged between the bottom cover and the adsorption layer, and a through hole connecting the filter layer and the adsorption layer is provided on the bottom cover.

[0016] Preferably, a protruding structure is provided on the bottom cover, and the bottom cover is detachably connected to the valve body via the protruding structure; a second air permeable channel penetrating the bottom cover is provided inside the protruding structure, and the second air permeable channel is connected to the air hole via the first air permeable channel.

[0017] Preferably, the humidity control balancing valve further includes a sealing ring, which is disposed around the outer peripheral surface of the valve body.

[0018] Another technical solution of the utility model to solve the above technical problem is to provide a sealing device, including a sealing box and the above-mentioned humidity control balancing valve, wherein the interior of the sealing box is provided with a accommodating cavity and an opening connected to the accommodating cavity, and the humidity control balancing valve is arranged at the opening.

[0019] Compared with the prior art, the humidity control balancing valve and sealing device provided by the utility model have the following advantages:

[0020] 1. The first embodiment of the utility model provides a humidity control balancing valve, which is arranged on a sealed box, and a accommodating chamber is formed between the humidity control balancing valve and the interior of the sealed box. The humidity control balancing valve includes a valve body and a breathable mechanism, and the breathable mechanism includes a valve cover, and the valve cover is movably arranged on the valve body; a first baffle wall is provided on the side of the valve body facing the valve cover, and a second baffle wall is provided on the side of the valve cover facing the first baffle wall, and the first baffle wall and the second baffle wall are arranged at intervals; a tortuous channel is formed between the first baffle wall and the valve cover, the second baffle wall and the valve body, and the adjacent first baffle walls, and one end of the tortuous channel is connected to the accommodating chamber, and the other end is connected to the outside atmosphere.

[0021] The humidity control balancing valve provided in the first embodiment of the utility model is arranged at the opening of the sealed box, and the humidity control balancing valve seals the opening through the valve body, so that the humidity control balancing valve is connected to the inside of the sealed box to form a receiving chamber. Among them, one end of the maze channel is connected to the receiving chamber formed between the humidity control balancing valve and the sealed box through the valve body, and the other end is connected to the outside atmosphere through the valve cover. Through this design, when the valve cover and the valve body are covered, low-speed gas flow can be carried out between the receiving chamber and the outside atmosphere.

[0022] It should be noted that when the internal pressure value of the accommodating chamber is less than or equal to the external atmospheric pressure, the valve cover can be movably arranged on the valve body and fixed by the structural cooperation of the two. At this time, the valve cover can cover the valve body; and when the internal pressure value of the accommodating chamber is greater than the external atmospheric pressure, the pressure inside the accommodating chamber will squeeze the humidity control balancing valve outward, and the valve cover will be separated from the valve body after being subjected to the outward squeezing pressure, and the entire valve cover will be bounced open. At this time, there is less obstruction for the gas inside the accommodating chamber to be discharged to the outside world.

[0023] In the ventilation mechanism provided in the first embodiment of the utility model, the valve cover is movably arranged on the valve body, so that the function of rapid ventilation can be realized, the ventilation efficiency is high, the ventilation effect is good, and the stability and safety of the use of the humidity control balance valve are improved.

[0024] It should be noted that the first and second baffle walls are provided on the valve body and the valve cover respectively, so that there are gaps between the first baffle wall and the valve cover, the second baffle wall and the valve body, and the adjacent first baffle walls, and these gaps are connected to form a maze channel.

[0025] 2. The humidity control balancing valve provided in the first embodiment of the utility model has a first gap between the first baffle wall and the valve cover and between the second baffle wall and the valve body, and a second gap between adjacent first baffle walls and second baffle walls; a tortuous channel is formed by connecting the first gap and the second gap.

[0026] It can be understood that by setting the first baffle wall on the valve body and the second baffle wall on the valve cover, when the outside air flows between the valve body and the valve cover, it needs to pass through a circuitous air flow channel, that is, a tortuous channel formed by the connection between the first gap and the second gap.

[0027] It should be noted that in the maze channel, the outside atmosphere first passes through the first gap between the first baffle wall and the valve cover or between the second baffle wall and the valve body, and reaches the second gap between the adjacent first baffle wall and the second baffle wall. The first gaps are connected through the second gap, so the second gap is set between adjacent first gaps.

[0028] 3. The humidity control balancing valve provided in the first embodiment of the utility model, the ventilation mechanism also includes a waterproof and breathable membrane and an end cover that can be covered on the valve body, the waterproof and breathable membrane is located between the valve cover and the end cover, and the end cover is farther away from the valve body than the valve cover; there is a gap between the end cover and the valve body.

[0029] It can be understood that the waterproof breathable membrane has the function of being waterproof and breathable, which can isolate liquids without affecting the passage of gases. At the same time, the gap between the end cover and the valve body provides a breathable space for the waterproof breathable membrane to a certain extent, which can effectively improve the air permeability.

[0030] It should be noted that the end cap can stabilize the waterproof breathable membrane between the end cap and the valve cover to prevent the waterproof breathable membrane from falling off and affecting the waterproof and breathable effect; the end cap can also block external dust and mud to better achieve the waterproof and breathable function.

[0031] 4. The humidity control balancing valve provided in the first embodiment of the utility model has an air inlet on the edge of the valve cover, one end of the air inlet is connected to the maze channel, and the other end of the air inlet is connected to the outside atmosphere after passing through the waterproof breathable membrane and the gap.

[0032] It can be understood that there is a gap between the end cover and the valve body for the outside atmosphere to flow in the gap. At this time, the gas flow rate is relatively fast, and after passing through the waterproof breathable membrane, it reaches the vicinity of the air inlet of the valve cover, and the air inlet connected to the tortuous channel is only arranged at the edge of the valve cover, so that the airflow flowing into the tortuous channel is relatively gentler than the airflow flowing in the gap.

[0033] It should be noted that opening an air inlet on the edge of the valve cover can slow down the gas flow rate, thereby effectively preventing the intrusion of external moisture.

[0034] 5. The humidity control balancing valve provided in the first embodiment of the utility model has a breathable member installed on the side of the valve body facing the valve cover, the breathable member is provided with breathable holes, and the breathable holes are connected to the maze channel; a first breathable channel is provided through the valve body, and the first breathable channel is connected to the maze channel through the breathable holes.

[0035] It can be understood that the air permeable member is installed on a side of the valve body facing the valve cover, and an air hole is provided on the air permeable member, and both sides of the air hole are respectively connected to the labyrinth passage and the first air permeable passage.

[0036] It should be noted that the opening of the air holes and the first air permeable channel further slows down the gas flow rate and effectively prevents external moisture from invading. The opening of the air holes allows the gas flowing through the tortuous channel to penetrate slowly, and the first air permeable channel allows the gas to condense into water vapor in advance and adhere to the inner wall of the first air permeable channel.

[0037] 6. The humidity control balancing valve provided in the first embodiment of the utility model has a third baffle wall on the side of the valve cover facing the air permeable member, and the height of the third baffle wall is less than the height of the second baffle wall; the air permeable member is a flexible member, and the third baffle wall is slidably connected to the valve body through the air permeable member.

[0038] It can be understood that the third baffle wall is arranged on the side of the valve cover facing the air permeable member, and the air permeable member is a flexible member. The third baffle wall and the air permeable member are abutted against each other. Since an air hole is provided on the side of the air permeable member facing the valve cover, the abutment of the air permeable member by the third baffle wall can further prevent water vapor from entering the first air permeable channel through the air hole, and can allow gas to slowly enter the first air permeable channel through the air hole.

[0039] 7. The humidity control balancing valve provided in the first embodiment of the utility model also includes a humidity control component, which is located on the side of the valve body away from the breathable mechanism; the humidity control component includes a bottom cover, a filter layer and an adsorption layer, the filter layer is arranged between the bottom cover and the adsorption layer, and a through hole connecting the filter layer and the adsorption layer is provided on the bottom cover.

[0040] It is understandable that when the gas flows inside the breathable mechanism, it may condense to form water vapor. A humidity control component is arranged on the side of the valve body away from the breathable mechanism. The humidity control component is used to filter the water vapor in the gas passing through the breathable mechanism, which can effectively reduce the water vapor entering the sealed box, thereby preventing the water vapor from affecting the components in the sealed box.

[0041] 8. The humidity control balancing valve provided in the first embodiment of the utility model has a protruding structure on the bottom cover, and the bottom cover is detachably connected to the valve body through the protruding structure; a second air permeable channel penetrating the bottom cover is provided inside the protruding structure, and the second air permeable channel is connected to the air hole through the first air permeable channel.

[0042] It can be understood that a protruding structure is provided on the bottom cover, and the bottom cover and the valve body are detachably connected through the protruding structure. The second air permeable channel inside the protruding structure is connected with the first air permeable channel, so that the outside atmosphere reaches the air hole after passing through the tortuous channel, and then passes through the first air permeable channel and the second air permeable channel in turn to reach the accommodating chamber between the humidity control balance valve and the sealing box.

[0043] It should be noted that the provision of the raised structure allows the gas and the water vapor attached thereto to reach the containing cavity first, and then the water vapor is adsorbed by the humidity control component. A through hole is provided on the bottom cover of the humidity control component. Through this design, the internal moisture can slowly pass through the filter layer and the adsorption layer, thereby ensuring the good adsorption effect of the adsorption layer on water vapor.

[0044] 9. The humidity control balancing valve provided in the first embodiment of the utility model further includes a sealing ring which is arranged around the outer peripheral surface of the valve body.

[0045] It can be understood that the humidity control balancing valve is arranged on the sealing box, and the valve body is installed and fixed on the mounting surface of the sealing box. At this time, the sealing ring arranged around the outer peripheral surface of the valve body can press the valve body onto the sealing box, which can ensure the sealing between the humidity control balancing valve and the sealing box, effectively prevent air leakage between the humidity control balancing valve and the sealing box, and realize the waterproof function of the humidity control balancing valve.

[0046] 10. The second embodiment of the utility model provides a sealing device, including a sealing box and the above-mentioned humidity control balancing valve, wherein the interior of the sealing box is provided with a containing cavity and an opening connected to the containing cavity, and the humidity control balancing valve is arranged at the opening.

[0047] The sealing device has the same beneficial effects as the humidity control balancing valve of the first embodiment described above, which will not be described in detail here.

Brief Description of the Drawings

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 It is an exploded view of the overall structure of the humidity control balancing valve of the first embodiment of the utility model.

[0050] Figure 2 It is a structural cross-sectional view of a humidity control balancing valve in a first embodiment of the utility model arranged in a sealing box.

[0051] Figure 3 This is a cross-sectional view of the overall structure of the humidity control balancing valve of the first embodiment of the utility model. Figure 1 .

[0052] Figure 4 It is a partial structural schematic diagram of the humidity control balancing valve in the first embodiment of the utility model.

[0053] Figure 5 It is a schematic diagram of the overall structure of the air permeable component in the humidity control balancing valve of the first embodiment of the utility model.

[0054] Figure 6 This is a cross-sectional view of the overall structure of the humidity control balancing valve of the first embodiment of the utility model. Figure 2 .

[0055] Figure 7 It is a sectional view of the overall structure of the sealing device of the second embodiment of the utility model.

[0056] Description of the accompanying drawings:

[0057] 100, humidity control balance valve; 1001, first gap; 1002, second gap; 1003, gap; 1004, first air permeable channel; 1005, second air permeable channel;

[0058] 11. valve body; 111. first baffle wall; 112. air permeable member; 1121. air vent;

[0059] 2. Breathable mechanism; 21. Valve cover; 211. Second baffle wall; 212. Air inlet; 213. Third baffle wall; 22. Waterproof breathable membrane; 23. End cover;

[0060] 31. bottom cover; 311. through hole; 312. protrusion structure; 32. filter layer; 33. adsorption layer;

[0061] 41. Sealing ring;

[0062] 200, sealed box; 201, accommodating chamber; 202, opening;

[0063] 300. Sealing equipment. [Specific implementation method]

[0064] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0065] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0066] It should be noted that the terms "first" and "second" etc. in the specification and claims of the present utility model are used to distinguish different objects rather than to describe a specific order.

[0067] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0068] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0069] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0070] See also Figure 1 and Figure 2 The first embodiment of the utility model provides a humidity control balancing valve 100, which is arranged on a sealed box 200. An accommodating chamber 201 is formed between the humidity control balancing valve 100 and the interior of the sealed box 200. The humidity control balancing valve 100 includes a valve body 11 and a venting mechanism 2. The venting mechanism 2 includes a valve cover 21. The valve cover 21 is movably arranged on the valve body 11.

[0071] A first retaining wall 111 is provided on one side of the valve body 11 facing the valve cover 21, and a second retaining wall 211 is provided on one side of the valve cover 21 facing the first retaining wall 111, and the first retaining wall 111 and the second retaining wall 211 are spaced apart from each other;

[0072] A labyrinth passage is formed between the first retaining wall 111 and the valve cover 21 , between the second retaining wall 211 and the valve body 11 , and between adjacent first retaining walls 111 and second retaining walls 211 . One end of the labyrinth passage is connected to the accommodating cavity 201 , and the other end is connected to the outside atmosphere.

[0073] The humidity control balancing valve 100 provided in the first embodiment of the utility model is arranged at the opening 202 of the sealing box 200 . The humidity control balancing valve 100 seals the opening 202 through the valve body 11 , so that the humidity control balancing valve 100 is connected with the inside of the sealing box 200 to form a accommodating chamber 201 .

[0074] It can be understood that one end of the maze channel is connected to the accommodating chamber 201 formed between the humidity control balancing valve 100 and the sealing box 200 through the valve body 11, and the other end is connected to the outside atmosphere through the valve cover 21. Through this design, when the valve cover 21 is covered with the valve body 11, a low-rate gas flow can be carried out between the accommodating chamber 201 and the outside atmosphere.

[0075] It should be noted that when the internal pressure value of the accommodating chamber 201 is less than or equal to the external atmospheric pressure, the valve cover 21 can be movably disposed on the valve body 11 and fixed by the structural cooperation of the two. At this time, the valve cover 21 can cover the valve body 11.

[0076] When the internal pressure value of the accommodating chamber 201 is greater than the external atmospheric pressure, the pressure inside the accommodating chamber 201 will squeeze the humidity control balancing valve 100 outwards, and the valve cover 21 will be separated from the valve body 11 after being subjected to the outward squeezing pressure, and the entire valve cover 21 will be bounced open. At this time, the gas inside the accommodating chamber 201 will be less obstructed from being discharged to the outside.

[0077] In the ventilation mechanism 2 provided in the first embodiment of the utility model, the valve cover 21 is movably arranged on the valve body 11, so as to realize the function of rapid ventilation, with high ventilation efficiency and good ventilation effect, thereby improving the stability and safety of the use of the humidity control balancing valve 100.

[0078] In the first embodiment of the utility model, the humidity control balancing valve 100 is arranged on the sealing box 200, and is specifically connected to the sealing box 200 through the valve body 11. The connection method between the two can be threaded connection, welding, bonding or clamping, etc. The utility model does not limit the connection method between the two. It is only necessary to fix the valve body 11 to the sealing box 200 and ensure the sealing of the sealing box 200. Through this design, the valve body 11 and the sealing box 200 can be prevented from loosening or falling off.

[0079] Furthermore, a first retaining wall 111 and a second retaining wall 211 are provided on the valve body 11 and the valve cover 21 respectively, so that there are intervals between the first retaining wall 111 and the valve cover 21, between the second retaining wall 211 and the valve body 11, and between adjacent first retaining walls 111 and second retaining walls 211, and these intervals are connected to form a maze channel.

[0080] See also Figure 3 There is a first gap 1001 between the first baffle wall 111 and the valve cover 21 and between the second baffle wall 211 and the valve body 11 , and there is a second gap 1002 between adjacent first baffle walls 111 and second baffle walls 211 .

[0081] The maze channel is formed by the communication between the first gap 1001 and the second gap 1002 .

[0082] It can be understood that by setting the first baffle wall 111 on the valve body 11 and the second baffle wall 211 on the valve cover 21, when the outside air flows between the valve body 11 and the valve cover 21, it needs to pass through a circuitous air flow channel, that is, a tortuous channel formed by the connection between the first gap 1001 and the second gap 1002.

[0083] In the labyrinth passage, the outside air first passes through the first gap 1001 between the first baffle wall 111 and the valve cover 21 or between the second baffle wall 211 and the valve body 11 , and reaches the second gap 1002 between the adjacent first baffle wall 111 and the second baffle wall 211 .

[0084] It should be noted that since the first baffle wall 111 and the second baffle wall 211 are spaced apart, when the gas enters the tortuous channel from the outside, it will reach the first second gap 1002 after passing through the first first gap 1001, and then pass through the second first gap 1001 and the second gap 1002 in turn, repeating the cycle. Through this design, the flow rate of the airflow can be slowed down and the moisture can be retained in the tortuous channel.

[0085] Furthermore, since the first gaps 1001 are connected through the second gaps 1002 , the second gaps 1002 are disposed between adjacent first gaps 1001 .

[0086] As a preferred implementation scheme of the first embodiment of the utility model, the first retaining wall 111 is an annular boss disposed on the valve body 11 facing the valve cover 21 , and the second retaining wall 211 is an annular boss disposed on the valve cover 21 facing the first retaining wall 111 .

[0087] The annular bosses corresponding to the first retaining wall 111 and the second retaining wall 211 have the same shape but different sizes, and the first retaining wall 111 and the second retaining wall 211 are arranged alternately with each other.

[0088] See also Figure 1 and Figure 3 The vent mechanism 2 also includes a waterproof and breathable membrane 22 and an end cover 23 that can cover the valve body 11. The waterproof and breathable membrane 22 is located between the valve cover 21 and the end cover 23. The end cover 23 is farther away from the valve body 11 than the valve cover 21; there is a gap 1003 between the end cover 23 and the valve body 11.

[0089] As an implementation scheme of the first embodiment of the utility model, the waterproof breathable membrane 22 is an eP TFE (expanded polytetrafluoroethylene) membrane, which is located between the valve cover 21 and the end cover 23 and fits with the valve body 11 on the basis of covering the valve cover 21 .

[0090] It can be understood that the waterproof and breathable membrane 22 can isolate liquid while maintaining breathability without affecting the passage of gas, thereby achieving the functions of waterproof and breathable, and effectively improving the dryness inside the humidity control balancing valve 100 to ensure the stability and safety of waterproof, breathable and dry.

[0091] In different usage scenarios, the waterproof breathable membrane 22 can also be replaced by a breathable valve. The installation of the breathable valve is more convenient than the waterproof breathable membrane 22, thereby simplifying the more complicated assembly process to reduce unnecessary labor costs and machine costs.

[0092] It should be noted that the gap 1003 between the end cover 23 and the valve body 11 can provide more ventilation space for the waterproof breathable membrane 22 to a certain extent, and can effectively improve the air permeability.

[0093] At the same time, the end cap 23 can be provided to stabilize the waterproof breathable membrane 22 between the end cap 23 and the valve cover 21, so as to prevent the waterproof breathable membrane 22 from falling off and affecting its waterproof and breathable effects.

[0094] In addition, the end cover 23 can also block external dust and mud to better achieve the waterproof and breathable function.

[0095] See also Figures 1 to 4 An air inlet 212 is provided at the edge of the valve cover 21 , one end of the air inlet 212 is connected to the maze channel, and the other end of the air inlet 212 is connected to the outside atmosphere after passing through the waterproof breathable membrane 22 and the gap 1003 .

[0096] It can be understood that the outside atmosphere first passes through the gap 1003 between the end cover 23 and the valve body 11, and then passes through the waterproof breathable membrane 22 to reach the air inlet 212 at the edge of the valve cover 21. The gap 1003 between the end cover 23 and the valve body 11 allows the outside atmosphere to flow here, and the gas flow rate in the gap 1003 is faster.

[0097] After passing through the gap 1003 , the gas passes through the waterproof breathable membrane 22 and reaches the vicinity of the air inlet 212 of the valve cover 21 . Since the air inlet 212 connected to the maze channel is only arranged at the edge of the valve cover 21 , the airflow flowing into the maze channel is gentler than the airflow flowing in the gap 1003 .

[0098] It should be noted that the air inlet 212 provided on the edge of the valve cover 21 plays a role in slowing down the gas flow rate, thereby effectively preventing the intrusion of external moisture.

[0099] It should be further explained that when the internal pressure of the accommodating chamber 201 is greater than the external atmospheric pressure, the pressure inside the accommodating chamber 201 will squeeze the humidity control balancing valve 100 outward. At this time, the valve cover 21 and the breathable member 112 are ejected, so that the gas inside the accommodating chamber 201 is discharged to the outside with less obstruction. At this time, the waterproof breathable membrane 22 and the end cover 23 will also be ejected by the upward impact force of the valve cover 21.

[0100] Since an air inlet 212 is provided at the edge of the valve cover 21, when the internal pressure of the accommodating chamber 201 is greater than the external atmospheric pressure and gas needs to be discharged, the valve cover 21 can guide the airflow inside the accommodating chamber 201 to be slowly discharged outward through the tortuous channel and the air inlet 212 in sequence, thereby preventing the internal air pressure of the accommodating chamber 201 from being too high and affecting important internal working components, thereby further improving the stability and safety of the humidity control balancing valve 100.

[0101] In the technical solution of the first embodiment of the utility model, there is one air inlet 212, which is arranged at the edge of the valve cover 21. The purpose of setting the air inlet 212 is to slow down the speed of gas entering the maze channel and to gather gas before the gas passes through the air inlet 212 to ensure gas exchange between the outside atmosphere and the accommodating chamber 201.

[0102] Other parameters of the air inlet 212, such as the size and shape of the air inlet 212, can be set according to the actual situation of the product, and can be adjusted according to the size, shape and other parameters of the valve cover 21, and are not limited here.

[0103] For further information, see Figure 1 , Figure 3 and Figure 5 A breathable member 112 is also installed on the side of the valve body 11 facing the valve cover 21. The breathable member 112 is provided with a breathable hole 1121, and the breathable hole 1121 is communicated with the labyrinth passage.

[0104] A through first air passage 1004 is provided in the valve body 11 . The first air passage 1004 is connected to the labyrinth passage through the air hole 1121 .

[0105] It can be understood that the air permeable member 112 is installed on the side of the valve body 11 facing the valve cover 21, and an air hole 1121 is opened on the air permeable member 112, and the two sides of the air hole 1121 are respectively connected to the maze channel and the first air permeable channel 1004, that is, one of the functions of setting the air hole 1121 is to connect the maze channel and the first air permeable channel 1004, so as to realize the gas exchange between the interior of the humidity control balancing valve 100 and the external atmosphere.

[0106] It should be noted that the provision of a tortuous channel can slow down the flow rate of the gas, and the provision of the air holes 1121 and the first air permeable channel 1004 can further slow down the flow rate of the gas, thereby effectively preventing the intrusion of external moisture.

[0107] Among them, the opening of the air hole 1121 can allow the gas flowing through the tortuous channel to penetrate slowly. It can be understood that when the gas flows through the tortuous channel, the condensed water vapor will remain in the tortuous channel, and this part of the water vapor will not enter the first air permeable channel 1004 through the air hole 1121.

[0108] As an implementation scheme of the first embodiment of the utility model, there can be many ways to install the air permeable member 112 on the valve body 11. The air permeable member 112 can be fixedly installed on the valve body 11 by means of interference fit and press-in. The air permeable member 112 and the valve body 11 can also be fixed by gluing. The valve body 11 can also be hollowed out to limit the air permeable member 112 to achieve fixation. Other installation methods will not be elaborated here, and they are all within the protection scope of the utility model.

[0109] Similarly, it can be understood that the shape of the air holes 1121 provided on the air permeable member 112 can also be selected in a variety of ways, such as a ring, a cross or other shapes. In the present embodiment, the shape of the air holes 1121 is a cross.

[0110] See also Figure 5 and Figure 6 A third retaining wall 213 is provided on a side of the valve cover 21 facing the air-permeable member 112 , and a height of the third retaining wall 213 is smaller than a height of the second retaining wall 211 .

[0111] It can be understood that the third baffle 213 is arranged on the side of the valve cover 21 facing the air permeable member 112, that is, the third baffle 213 is further arranged in the maze channel, so that the gas flowing in the maze channel can further slow down the flow rate before passing through the air holes 1121.

[0112] Furthermore, the air-permeable member 112 is a flexible member, and the third retaining wall 213 is slidably connected to the valve body 11 through the air-permeable member 112 .

[0113] It should be noted that, since a ventilation hole 1121 is provided on the side of the ventilation member 112 facing the valve cover 21, the support of the ventilation member 112 by the third retaining wall 213 can further prevent water vapor from entering the first ventilation channel 1004 through the ventilation hole 1121, and can allow gas to slowly enter the first ventilation channel 1004 through the ventilation hole 1121.

[0114] In the specific implementation scheme of the first embodiment of the utility model, the air permeable member 112 is a flexible member made of silicone material, and because the third baffle wall 213 and the air permeable member 112 abut against each other, when the gas flows between the third baffle wall 213 and the air permeable member 112, the abutment between the two will form a certain air pressure difference between the interior of the valve body 11 and the maze channel.

[0115] In particular, the breathable member 112 made of silicone material will produce a certain deformation under the action of airflow. Through this design, water vapor can be retained in the maze channel while the gas can slowly enter the first breathable channel 1004 through the breathable holes 1121 to reach the interior of the valve body 11.

[0116] Please continue reading Figure 1 and Figure 2 The humidity control balancing valve 100 also includes a humidity control component, which is located on the side of the valve body 11 away from the ventilation mechanism 2.

[0117] Furthermore, the humidity control component includes a bottom cover 31 , a filter layer 32 and an adsorption layer 33 . The filter layer 32 is disposed between the bottom cover 31 and the adsorption layer 33 . A through hole 311 connecting the filter layer 32 and the adsorption layer 33 is disposed on the bottom cover 31 .

[0118] It is understandable that during the flow of gas inside the breathable mechanism 2, condensation may form water vapor. A humidity control component is provided on the side of the valve body 11 away from the breathable mechanism 2. The humidity control component is used to filter the water vapor in the gas passing through the breathable mechanism 2, which can effectively reduce the water vapor entering the sealed box 200, thereby preventing the water vapor from affecting the components in the sealed box 200.

[0119] The bottom cover 31 is located at one end of the humidity control balancing valve 100 away from the end cover 23 , the adsorption layer 33 is installed inside the valve body 11 through a surface of the valve body 11 close to the bottom cover 31 , and the filter layer 32 is located between the bottom cover 31 and the adsorption layer 33 .

[0120] It should be noted that, in the humidity control component, the adsorption layer 33 is specifically a drying device, which can keep the accommodating chamber 201 between the humidity control balancing valve 100 and the sealing box 200 in a dry state, and the filter layer 32 can first filter certain impurities in the water vapor to avoid affecting the life of the drying device and further affecting the durability of the humidity control balancing valve 100.

[0121] It should be further explained that the bottom cover 31 has a structural function of protecting the filter layer 32 and the adsorption layer 33 to prevent the filter layer 32 and the adsorption layer 33 from being completely exposed in the accommodating cavity 201 and affecting the moisture-control balancing valve 100's ability to dry water vapor.

[0122] In addition, a through hole 311 is provided on the bottom cover 31, one end of the through hole 311 is connected to the filter layer 32 and the adsorption layer 33, and the other end is connected to the accommodating chamber 201. In the specific implementation of the first embodiment of the utility model, the water vapor formed in the accommodating chamber 201 must pass through the through hole 311, and the impurities in the water vapor are filtered out by the filter layer 32 before reaching the adsorption layer 33. Through this design, the water vapor to be dried by the adsorption layer 33 can evenly pass through the filter layer 32 and finally reach the adsorption layer 33, and the adsorption layer 33 is responsible for absorbing the residual moisture in the accommodating chamber 201.

[0123] See also Figures 1 to 3 , Figure 5 A protruding structure 312 is provided on the bottom cover 31, and the bottom cover 31 is detachably connected to the valve body 11 through the protruding structure 312; a second air permeable channel 1005 penetrating the bottom cover 31 is provided inside the protruding structure 312, and the second air permeable channel 1005 is connected to the air hole 1121 through the first air permeable channel 1004.

[0124] It can be understood that a protrusion structure 312 is provided on the bottom cover 31 , and the bottom cover 31 and the valve body 11 are detachably connected via the protrusion structure 312 , thereby making the first air permeable channel 1004 communicate with the second air permeable channel 1005 inside the protrusion structure 312 and penetrating the bottom cover 31 .

[0125] Furthermore, the outside air reaches the air hole 1121 after passing through the maze channel, and the second air hole 1005 is connected to the air hole 1121 through the first air hole 1004. Therefore, the gas reaching the air hole 1121 passes through the first air hole 1004 and the second air hole 1005 in sequence before reaching the accommodating chamber 201.

[0126] It should be noted that, for the second air permeable channel 1005 in the protruding structure 312 that passes through the bottom cover 31, its inner diameter is less than or equal to the inner diameter of the first air permeable channel 1004, so as to achieve a detachable connection between the bottom cover 31 and the valve body 11 while preventing the gas reaching the air hole 1121 from directly contacting the filter layer 32 and the adsorption layer 33 after flowing through the first air permeable channel 1004 and the second air permeable channel 1005.

[0127] As a preferred solution in the first embodiment of the utility model, the inner diameter of the second air permeable channel 1005 is slightly smaller than the inner diameter of the first air permeable channel 1004, and the outer diameter of the protruding structure 312 is larger than the inner diameter of the first air permeable channel 1004. It can be understood that the size of the protruding structure 312, the inner diameters of the first air permeable channel 1004 and the second air permeable channel 1005 and other parameters can be set according to actual conditions, as long as it can ultimately ensure that the second air permeable channel 1005 that passes through the inside of the protruding structure 312 separates the first air permeable channel 1004 from the filter layer 32 and the adsorption layer 33. Therefore, modifications made on the basis of the present technical solution should be within the protection scope of the utility model.

[0128] It should be noted that, by providing the protruding structure 312, the gas and the water vapor attached thereto can first reach the accommodating cavity 201, and then the water vapor can be adsorbed by the humidity control component. A through hole 311 is provided on the bottom cover 31 of the humidity control component, which allows the internal moisture to slowly pass through the filter layer 32 and the adsorption layer 33, thereby ensuring a good adsorption effect of the adsorption layer 33 on water vapor.

[0129] See also Figure 2 The humidity control balancing valve 100 further includes a sealing ring 41 , which is disposed around the outer peripheral surface of the valve body 11 .

[0130] The inner ring of the sealing ring 41 is fixed to the outer peripheral surface of the valve body 11 , and when the accommodating cavity 201 is formed between the humidity control balancing valve 100 and the sealing box 200 , the outer ring of the sealing ring 41 abuts against the sealing box 200 .

[0131] It can be understood that the humidity control balancing valve 100 is set on the sealing box 200, and the valve body 11 is installed and fixed on the installation surface of the sealing box 200. At this time, the sealing ring 41 is arranged around the outer peripheral surface of the valve body 11, so that the valve body 11 can be pressed on the sealing box 200.

[0132] Through this design, good sealing between the humidity control balancing valve 100 and the sealing box 200 can be ensured, air leakage between the humidity control balancing valve 100 and the sealing box 200 can be effectively prevented, and the waterproof function of the humidity control balancing valve 100 can be achieved.

[0133] In addition, the sealing ring 41 surrounding the outer surface of the valve body 11 can also prevent dust and moisture outside the sealing box 200 from entering, thereby improving the safety and stability of using the humidity control balancing valve 100.

[0134] See also Figure 7 The second embodiment of the utility model provides a sealing device 300, including a sealing box 200 and the above-mentioned humidity control balancing valve 100, the interior of the sealing box 200 is provided with a accommodating cavity 201 and an opening 202 connected to the accommodating cavity 201, and the humidity control balancing valve 100 is arranged at the opening 202.

[0135] The sealing device 300 of the second embodiment of the present invention comprises the humidity control balancing valve 100 provided in the first embodiment. The sealing device 300 has the same beneficial effects as the humidity control balancing valve 100 described above.

[0136] Among them, the humidity control balancing valve 100 is used to balance the air pressure inside the accommodating chamber 201 with the air pressure outside, and when the accommodating chamber 201 exchanges gas with the outside, the humidity control balancing valve 100 can dry the exchanged airflow, reduce the water vapor entering the accommodating chamber 201, and reduce the probability of the "condensation" phenomenon mentioned in the background technology occurring in the sealing device 300.

[0137] It should be noted that the sealed box 200 can be a car lamp, or a sealed box for products such as power batteries, energy storage batteries and communication equipment. In addition, the sealed box 200 can also be other sealed equipment that needs to be kept waterproof, breathable, dry and moisture-absorbent. The humidity control balancing valve 100 arranged on the sealed box 200 balances the internal and external pressures of the sealed box 200 to achieve functions such as waterproof, breathable, dry and moisture-absorbent.

[0138] Compared with the prior art, the humidity control balancing valve and sealing device provided by the utility model have the following advantages:

[0139] 1. The first embodiment of the utility model provides a humidity control balancing valve, which is arranged on a sealed box, and a accommodating chamber is formed between the humidity control balancing valve and the interior of the sealed box. The humidity control balancing valve includes a valve body and a breathable mechanism, and the breathable mechanism includes a valve cover, and the valve cover is movably arranged on the valve body; a first baffle wall is provided on the side of the valve body facing the valve cover, and a second baffle wall is provided on the side of the valve cover facing the first baffle wall, and the first baffle wall and the second baffle wall are arranged at intervals; a tortuous channel is formed between the first baffle wall and the valve cover, the second baffle wall and the valve body, and the adjacent first baffle walls, and one end of the tortuous channel is connected to the accommodating chamber, and the other end is connected to the outside atmosphere.

[0140] The humidity control balancing valve provided in the first embodiment of the utility model is arranged at the opening of the sealed box, and the humidity control balancing valve seals the opening through the valve body, so that the humidity control balancing valve is connected to the inside of the sealed box to form a receiving chamber. Among them, one end of the maze channel is connected to the receiving chamber formed between the humidity control balancing valve and the sealed box through the valve body, and the other end is connected to the outside atmosphere through the valve cover. Through this design, when the valve cover and the valve body are covered, low-speed gas flow can be carried out between the receiving chamber and the outside atmosphere.

[0141] It should be noted that when the internal pressure value of the accommodating chamber is less than or equal to the external atmospheric pressure, the valve cover can be movably arranged on the valve body and fixed by the structural cooperation of the two. At this time, the valve cover can cover the valve body; and when the internal pressure value of the accommodating chamber is greater than the external atmospheric pressure, the pressure inside the accommodating chamber will squeeze the humidity control balancing valve outward, and the valve cover will be separated from the valve body after being subjected to the outward squeezing pressure, and the entire valve cover will be bounced open. At this time, there is less obstruction for the gas inside the accommodating chamber to be discharged to the outside world.

[0142] In the ventilation mechanism provided in the first embodiment of the utility model, the valve cover is movably arranged on the valve body, so that the function of rapid ventilation can be realized, the ventilation efficiency is high, the ventilation effect is good, and the stability and safety of the use of the humidity control balance valve are improved.

[0143] It should be noted that the first and second baffle walls are provided on the valve body and the valve cover respectively, so that there are gaps between the first baffle wall and the valve cover, the second baffle wall and the valve body, and the adjacent first baffle walls, and these gaps are connected to form a maze channel.

[0144] 2. The humidity control balancing valve provided in the first embodiment of the utility model has a first gap between the first baffle wall and the valve cover and between the second baffle wall and the valve body, and a second gap between adjacent first baffle walls and second baffle walls; a tortuous channel is formed by connecting the first gap and the second gap.

[0145] It can be understood that by setting the first baffle wall on the valve body and the second baffle wall on the valve cover, when the outside air flows between the valve body and the valve cover, it needs to pass through a circuitous air flow channel, that is, a tortuous channel formed by the connection between the first gap and the second gap.

[0146] It should be noted that in the maze channel, the outside atmosphere first passes through the first gap between the first baffle wall and the valve cover or between the second baffle wall and the valve body, and reaches the second gap between the adjacent first baffle wall and the second baffle wall. The first gaps are connected through the second gap, so the second gap is set between adjacent first gaps.

[0147] 3. The humidity control balancing valve provided in the first embodiment of the utility model, the ventilation mechanism also includes a waterproof and breathable membrane and an end cover that can be covered on the valve body, the waterproof and breathable membrane is located between the valve cover and the end cover, and the end cover is farther away from the valve body than the valve cover; there is a gap between the end cover and the valve body.

[0148] It can be understood that the waterproof breathable membrane has the function of being waterproof and breathable, which can isolate liquids without affecting the passage of gases. At the same time, the gap between the end cover and the valve body provides a breathable space for the waterproof breathable membrane to a certain extent, which can effectively improve the air permeability.

[0149] It should be noted that the end cap can stabilize the waterproof breathable membrane between the end cap and the valve cover to prevent the waterproof breathable membrane from falling off and affecting the waterproof and breathable effect; the end cap can also block external dust and mud to better achieve the waterproof and breathable function.

[0150] 4. The humidity control balancing valve provided in the first embodiment of the utility model has an air inlet on the edge of the valve cover, one end of the air inlet is connected to the maze channel, and the other end of the air inlet is connected to the outside atmosphere after passing through the waterproof breathable membrane and the gap.

[0151] It can be understood that there is a gap between the end cover and the valve body for the outside atmosphere to flow in the gap. At this time, the gas flow rate is relatively fast, and after passing through the waterproof breathable membrane, it reaches the vicinity of the air inlet of the valve cover, and the air inlet connected to the tortuous channel is only arranged at the edge of the valve cover, so that the airflow flowing into the tortuous channel is relatively gentler than the airflow flowing in the gap.

[0152] It should be noted that opening an air inlet on the edge of the valve cover can slow down the gas flow rate, thereby effectively preventing the intrusion of external moisture.

[0153] 5. The humidity control balancing valve provided in the first embodiment of the utility model has a breathable member installed on the side of the valve body facing the valve cover, the breathable member is provided with breathable holes, and the breathable holes are connected to the maze channel; a first breathable channel is provided through the valve body, and the first breathable channel is connected to the maze channel through the breathable holes.

[0154] It can be understood that the air permeable member is installed on a side of the valve body facing the valve cover, and an air hole is provided on the air permeable member, and both sides of the air hole are respectively connected to the labyrinth passage and the first air permeable passage.

[0155] It should be noted that the opening of the air holes and the first air permeable channel further slows down the gas flow rate and effectively prevents external moisture from invading. The opening of the air holes allows the gas flowing through the tortuous channel to penetrate slowly, and the first air permeable channel allows the gas to condense into water vapor in advance and adhere to the inner wall of the first air permeable channel.

[0156] 6. The humidity control balancing valve provided in the first embodiment of the utility model has a third baffle wall on the side of the valve cover facing the air permeable member, and the height of the third baffle wall is less than the height of the second baffle wall; the air permeable member is a flexible member, and the third baffle wall is slidably connected to the valve body through the air permeable member.

[0157] It can be understood that the third baffle wall is arranged on the side of the valve cover facing the air permeable member, and the air permeable member is a flexible member. The third baffle wall and the air permeable member are abutted against each other. Since an air hole is provided on the side of the air permeable member facing the valve cover, the abutment of the air permeable member by the third baffle wall can further prevent water vapor from entering the first air permeable channel through the air hole, and can allow gas to slowly enter the first air permeable channel through the air hole.

[0158] 7. The humidity control balancing valve provided in the first embodiment of the utility model also includes a humidity control component, which is located on the side of the valve body away from the breathable mechanism; the humidity control component includes a bottom cover, a filter layer and an adsorption layer, the filter layer is arranged between the bottom cover and the adsorption layer, and a through hole connecting the filter layer and the adsorption layer is provided on the bottom cover.

[0159] It is understandable that when the gas flows inside the breathable mechanism, it may condense to form water vapor. A humidity control component is arranged on the side of the valve body away from the breathable mechanism. The humidity control component is used to filter the water vapor in the gas passing through the breathable mechanism, which can effectively reduce the water vapor entering the sealed box, thereby preventing the water vapor from affecting the components in the sealed box.

[0160] 8. The humidity control balancing valve provided in the first embodiment of the utility model has a protruding structure on the bottom cover, and the bottom cover is detachably connected to the valve body through the protruding structure; a second air permeable channel penetrating the bottom cover is provided inside the protruding structure, and the second air permeable channel is connected to the air hole through the first air permeable channel.

[0161] It can be understood that a protruding structure is provided on the bottom cover, and the bottom cover and the valve body are detachably connected through the protruding structure. The second air permeable channel inside the protruding structure is connected with the first air permeable channel, so that the outside atmosphere reaches the air hole after passing through the tortuous channel, and then passes through the first air permeable channel and the second air permeable channel in turn to reach the accommodating chamber between the humidity control balance valve and the sealing box.

[0162] It should be noted that the provision of the raised structure allows the gas and the water vapor attached thereto to reach the containing cavity first, and then the water vapor is adsorbed by the humidity control component. A through hole is provided on the bottom cover of the humidity control component. Through this design, the internal moisture can slowly pass through the filter layer and the adsorption layer, thereby ensuring the good adsorption effect of the adsorption layer on water vapor.

[0163] 9. The humidity control balancing valve provided in the first embodiment of the utility model further includes a sealing ring which is arranged around the outer peripheral surface of the valve body.

[0164] It can be understood that the humidity control balancing valve is arranged on the sealing box, and the valve body is installed and fixed on the mounting surface of the sealing box. At this time, the sealing ring arranged around the outer peripheral surface of the valve body can press the valve body onto the sealing box, which can ensure the sealing between the humidity control balancing valve and the sealing box, effectively prevent air leakage between the humidity control balancing valve and the sealing box, and realize the waterproof function of the humidity control balancing valve.

[0165] 10. The second embodiment of the utility model provides a sealing device, including a sealing box and the above-mentioned humidity control balancing valve, wherein the interior of the sealing box is provided with a containing cavity and an opening connected to the containing cavity, and the humidity control balancing valve is arranged at the opening.

[0166] The sealing device has the same beneficial effects as the humidity control balancing valve of the first embodiment described above, which will not be described in detail here.

[0167] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A humidity control balancing valve, arranged on a sealed box, wherein a receiving cavity is formed between the humidity control balancing valve and the interior of the sealed box, characterized in that: The humidity control balancing valve comprises a valve body and a ventilating mechanism, wherein the ventilating mechanism comprises a valve cover, and the valve cover is movably arranged on the valve body; A first baffle wall is provided on a side of the valve body facing the valve cover, and a second baffle wall is provided on a side of the valve cover facing the first baffle wall, wherein the first baffle wall and the second baffle wall are spaced apart from each other; A labyrinth passage is formed between the first baffle wall and the valve cover, the second baffle wall and the valve body, and the adjacent first baffle wall and the second baffle wall. One end of the labyrinth passage is connected to the accommodating cavity, and the other end is connected to the outside atmosphere.

2. The humidity control balancing valve according to claim 1, characterized in that: There is a first gap between the first baffle wall and the valve cover, between the second baffle wall and the valve body, and there is a second gap between the adjacent first baffle wall and the second baffle wall; The labyrinth passage is formed by the communication between the first gap and the second gap.

3. The humidity control balancing valve according to claim 2, characterized in that: The venting mechanism further comprises a waterproof and breathable membrane and an end cover that can cover the valve body, wherein the waterproof and breathable membrane is located between the valve cover and the end cover, and the end cover is farther away from the valve body than the valve cover; There is a gap between the end cover and the valve body.

4. The humidity control balancing valve according to claim 3, characterized in that: An air inlet is provided on the edge of the valve cover, one end of the air inlet is communicated with the labyrinth passage, and the other end of the air inlet is communicated with the outside atmosphere after passing through the waterproof breathable membrane and the gap.

5. The humidity control balancing valve according to claim 4, characterized in that: A breathable member is also installed on a side of the valve body facing the valve cover, and the breathable member is provided with a breathable hole, and the breathable hole is communicated with the labyrinth channel; The valve body is provided with a first air permeable passage which is connected to the labyrinth passage through the air permeable hole.

6. The humidity control balancing valve according to claim 5, characterized in that: A third baffle wall is provided on a side of the valve cover facing the air-permeable member, and the height of the third baffle wall is smaller than the height of the second baffle wall; The air-permeable member is a flexible member, and the third blocking wall is slidably connected to the valve body through the air-permeable member.

7. The humidity control balancing valve according to claim 6, characterized in that: The humidity control balancing valve further comprises a humidity control component, and the humidity control component is located on a side of the valve body away from the ventilation mechanism; The humidity control component comprises a bottom cover, a filter layer and an adsorption layer. The filter layer is arranged between the bottom cover and the adsorption layer. A through hole connecting the filter layer and the adsorption layer is arranged on the bottom cover.

8. The humidity control balancing valve according to claim 7, characterized in that: A protrusion structure is provided on the bottom cover, and the bottom cover is detachably connected to the valve body through the protrusion structure; A second air permeable passage penetrating the bottom cover is provided inside the protruding structure, and the second air permeable passage is communicated with the air permeable hole through the first air permeable passage.

9. The humidity control balancing valve according to claim 1, characterized in that: The humidity control balancing valve further comprises a sealing ring which is disposed around the outer peripheral surface of the valve body.

10. A sealing device, characterized in that: It comprises a sealed box and the humidity control balancing valve according to any one of claims 1 to 9, wherein the sealed box is provided with a accommodating cavity and an opening connected to the accommodating cavity, and the humidity control balancing valve is arranged at the opening.

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