Breather valve integrated with air desiccant function

Abstract

This utility model relates to a breathing valve integrating air desiccant function, comprising: a valve body, a protective end cap, a filter element assembly, and a one-way valve structure; the protective end cap is connected to the valve body to form a closed shell; the filter element assembly and the one-way valve structure are disposed within the closed shell formed by the protective end cap and the valve body, with the one-way valve structure disposed on the filter element assembly; the valve body has a system interface and a vent, with a labyrinth structure at the vent; the filter element assembly includes: a filter element end cap, filter paper, a filter element body, and a sealing cap; the filter element body is filled with desiccant and fixed by breathable non-woven fabric; the filter element end cap, filter element body, and sealing cap are connected sequentially; the filter paper is wound around the filter element body, and the filter element end cap is connected to the system interface; the one-way valve structure consists of a perforated structure on the sealing cap and an umbrella valve, realizing dual-channel diversion of positive pressure exhaust and negative pressure intake. Compared with the prior art, this utility model has the advantages of multi-functional integration of drying and filtration, extended service life, reduced cost, and environmental friendliness.

Description

Technical Field

[0001] This utility model relates to the field of breathing valve technology, and in particular to a breathing valve that integrates an air desiccant function. Background Technology

[0002] As a critical safety device, the breather valve encompasses multiple core functions and meets industrial requirements. It is used for pressure balancing in storage tanks or enclosed cavities, and its main functions are as follows:

[0003] 1. Pressure balancing mechanism: The breather valve automatically adjusts the pressure difference between the inside and outside of the container to prevent overpressure (positive pressure) or vacuum (negative pressure) caused by temperature changes or liquid inflow / outflow, thus avoiding damage to the tank structure (such as collapse or rupture).

[0004] 2. Dual benefits of safety and environmental protection: In the petrochemical industry, breather valves not only protect equipment, but also comply with environmental regulations (such as EPA standards) by reducing the emission of volatile organic compounds (VOCs).

[0005] 3. Multi-industry applicability: Adaptable to different media (such as corrosive chemicals and flammable gases) in industries such as petroleum, chemical, pharmaceutical, and food, and must meet special requirements such as explosion-proof and corrosion resistance.

[0006] Patent CN201410067880.4 discloses a desiccant for preventing condensation in automotive headlights, which is a mixture of the following components in the indicated mass ratios: type A silica gel, type B silica gel, type C silica gel, regular montmorillonite, irregular montmorillonite, etc. This invention also proposes a breather valve containing the desiccant. This invention uses a breather valve desiccant installed in the headlight exhaust port to control the humidity environment inside the headlight, eliminating the "condensation" phenomenon on the headlight cover caused by environmental changes when the headlight is turned on, greatly reducing the amount of moisture entering the headlight. Furthermore, the increased internal temperature of the headlight when it is normally on activates the breather valve desiccant, extending its service life. If possible, removing the headlight tail cap and installing a breather valve desiccant on it would further eliminate the chance of "condensation" in the headlight. However, this method has limited functionality and is not convenient to maintain.

[0007] Patent CN202110833722.5 discloses a breather valve for a sulfuric acid storage tank with a drying function, comprising a first tank body, a second tank body installed on one side of the first tank body, a support cover fixedly installed on the upper end of the first tank body, and sleeves provided on the upper surfaces of both the support cover and the second tank body. A sealing top cover is movably connected to the top of the inner wall of the support cover. One side of the first tank body and one side of the second tank body are connected by a connecting pipe. An airflow passage is formed between the outer side of the lower end of the support cover and the top of the first tank body. A dehumidification mechanism is installed on one side of the first tank body, and the dehumidification mechanism is connected to the second tank body and the first tank body by an airflow transmission pipe. However, the cost is high, the size is large, and the applicable scenarios are limited.

[0008] Existing breather valves have relatively simple functions, lacking dehumidification capabilities or having very limited dehumidification capacity, which cannot meet the usage and cost requirements of modern equipment. Utility Model Content

[0009] The purpose of this invention is to overcome the defects of the existing technology and provide a breathing valve that integrates air desiccant function, combining drying and filtration functions; extending service life, reducing costs; and being environmentally friendly.

[0010] The objective of this utility model can be achieved through the following technical solutions:

[0011] This invention integrates air drying, filtration, and oil-gas separation functions into a traditional breather valve. It employs a compact, integrated drying and filtration design. A pre-separation structure initially filters large particles and recirculates the medium. Combined with a dual-channel mode (intake / exhaust flow separation) and a labyrinthine vent structure, it achieves multiple functions including humidity control, media leakage prevention, waterproofing, dustproofing, and oil-gas separation. This design significantly extends the lifespan of the desiccant and filter element, reduces maintenance costs and parts replacement frequency, while optimizing space utilization and economy, meeting the comprehensive requirements of system moisture prevention, media purity, and environmentally friendly emissions.

[0012] This utility model provides a breathing valve with integrated air desiccant function, including: valve body, protective end cap, filter element assembly and one-way valve structure; the protective end cap is connected to the valve body to form a closed shell; the filter element assembly and one-way valve structure are disposed inside the closed shell formed by the protective end cap and the valve body, and the one-way valve structure is disposed on the filter element assembly;

[0013] The valve body is provided with a system interface and a vent, and the vent is provided with a labyrinth structure; the system interface is used to connect the breather valve and the sealing device, and when the pressure in the sealing device rises, gas is introduced into the breather valve, and when the pressure in the sealing device is less than atmospheric pressure, external air is introduced into the sealing device to balance the pressure.

[0014] The labyrinth structure prevents external liquid water from directly entering the breather valve, meeting the customer's waterproof rating requirements. Simultaneously, the labyrinth structure also possesses a certain oil-gas separation capability, effectively reducing system emissions.

[0015] The filter element assembly includes: a filter element end cap, filter paper, a filter element body, and a sealing cap; the filter element body is filled with a desiccant and fixed by a breathable non-woven fabric; the filter element end cap, filter element body, and sealing cap are connected in sequence.

[0016] The filter paper is used to filter oil and grease inside the system. When the system is under positive pressure and needs to be vented, the filter paper needs to filter oil and gas components to prevent oil and gas from polluting the air and to prevent the loss of internal media due to excessive air permeability. At the same time, when the system is under negative pressure, it filters impurities in the outside air to prevent external dirt from entering the system and contaminating the internal media.

[0017] The filter element end cap is used to fix the filter paper, which is wound around the filter element body. The filter element end cap is connected to the system interface. When the system is under positive pressure, the gas to be filtered is introduced into the filter element assembly. At the same time, when the system is under negative pressure, external air is introduced into the system.

[0018] The desiccant is used to control the humidity of external air entering the system, preventing excessive moisture from entering the system and diluting and contaminating the medium inside the system.

[0019] The one-way valve structure consists of a hole structure on the cover and an umbrella valve. The umbrella valve is located inside the hole structure on the cover, realizing dual-channel diversion of positive pressure exhaust and negative pressure intake.

[0020] Furthermore, the filter element end cap is equipped with a pre-separation structure, which is used to initially separate large molecular particles in the gas and return the separation medium to the system. This reduces excessive loss of the medium; at the same time, the gas passing through the pre-separation treatment can prevent too much medium from contacting the filter paper, which can extend the life of the filter element assembly as much as possible.

[0021] Furthermore, the pre-separation structure, a cyclone separation structure, is located on the inner end face of the filter element end cap. Specifically, it includes radially distributed spiral guide vanes, a central return hole, and a flow channel.

[0022] Furthermore, the system includes an interface sealing ring that mates with the valve body and filter element end cap to isolate the dirty and clean sides of the breather valve filter element assembly. The sealing method and its placement can be optimized based on the customer's boundary and assembly requirements.

[0023] Furthermore, the filter element body has a mesh structure, the lower structure of the filter element body is used for winding, supporting and fixing the filter paper, and the upper structure of the filter element body is used for fixing and supporting the breathable nonwoven fabric.

[0024] Furthermore, the breathable nonwoven fabric is arranged in the upper structure of the filter element body, possessing a certain degree of breathability and strength to ensure that the desiccant will not leak due to any impact. Simultaneously, the strength and breathability are adjusted according to the resistance requirements of the filter element assembly. The cap, in conjunction with the filter element body and the breathable nonwoven fabric, fixes the filled desiccant to the upper end of the filter element assembly, enabling it to dry the external air.

[0025] Furthermore, the cover is provided with a protective sealing ring, which cooperates with the valve body and the cover to achieve the isolation function between the areas before and after air drying.

[0026] Furthermore, the umbrella valve includes a forward umbrella valve and a reverse umbrella valve.

[0027] Furthermore, the cap has a circular cross-section, and the cap has multiple hole structures, with one hole structure at the center and multiple hole structures symmetrically distributed around the center on the circumference.

[0028] Furthermore, the maze structure consists of multi-level winding channels, including three or more layers of Z-shaped turning channels.

[0029] The working process of this utility model is as follows:

[0030] When the internal pressure of the system rises due to working conditions or changes in external temperature, the breather valve can release the internal pressure in time. The gas inside the system enters the filter element assembly after passing through the system interface and the pre-separation structure. After passing through the filter paper, the gas enters the outer space of the filter element assembly, pushes open the forward umbrella valve, and flows into the atmosphere through the vent after passing through the labyrinth structure on the protective end cover. Under this condition, the reverse umbrella valve is closed due to pressure.

[0031] When the internal pressure of the system drops due to operation or changes in external temperature, external air flows into the labyrinth structure on the protective end cover through the vent and enters the top space of the valve body. The air pushes open the reverse umbrella valve and enters the desiccant chamber. After being dried by the desiccant, the air enters the outer space of the filter element assembly, then passes through the filter paper and enters the interior of the filter element assembly. After flowing through the pre-separation structure, it enters the system from the system interface for pressure balance. Under this condition, the forward umbrella valve is closed due to pressure.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] (1) Multifunctional integration of drying and filtration. The integrated drying and filtration design integrates the desiccant with the breather valve. The desiccant is fixed by the breathable non-woven fabric to achieve humidity control and prevent excessive moisture from entering the system, diluting and contaminating the media in the system. The pre-separation structure, filter paper and labyrinth structure form a three-stage treatment system, which simultaneously realizes four functions: pressure balance, humidity control, media recovery and oil-gas separation.

[0034] (2) Extended service life and reduced costs. The compact design occupies less space, improving the product's layout adaptability and reducing manufacturing costs. The pre-separation structure initially separates large molecular particles in the gas, allowing the separated medium to flow back into the system, reducing excessive media loss; simultaneously, the pre-separation process prevents excessive media contact with the filter paper, maximizing filter lifespan. The breather valve adopts a dual-channel design for both intake and exhaust, allowing air to flow through different channels according to intake and exhaust requirements. This design extends the desiccant's lifespan, prolongs filter replacement cycles, and improves product economy.

[0035] (3) Environmentally friendly. The vent design incorporates a labyrinth structure, giving the breather valve a certain degree of waterproofing to prevent external liquid water from directly entering the valve, meeting waterproofing requirements. Simultaneously, the labyrinth structure also provides oil-gas separation capabilities, effectively reducing system emissions. The pre-separation structure allows for media recirculation, reducing oil loss. Attached Figure Description

[0036] Figure 1 An explosion diagram of a breathing valve that integrates air desiccant function;

[0037] Figure 2 A front view of a breather valve with integrated air desiccant function;

[0038] Figure 3 A schematic diagram showing the gas flow direction when a breather valve with integrated air desiccant function is venting.

[0039] Figure 4 A schematic diagram showing the gas flow direction during inhalation for a breathing valve that integrates an air desiccant function;

[0040] Figure 5 A schematic diagram of the labyrinth structure of the air inlet of a breathing valve that integrates air desiccant function;

[0041] Figure 6 A front view of a breather valve filter assembly with integrated air desiccant function;

[0042] Figure 7 Top view of the breather valve filter assembly with integrated air desiccant function;

[0043] Figure 8A schematic diagram of a one-way valve structure for a breather valve filter assembly with integrated air desiccant function;

[0044] Reference numerals: 1-Valve body; 2-Protective end cap; 3-Matching interface sealing ring; 4-Filter element end cap; 5-Filter paper; 6-Filter element body; 7-Breathable non-woven fabric; 8-Desiccant; 9-Protective sealing ring; 10-Cap; 11-Umbrella valve; 12-Ventilation port; 13-Forward umbrella valve; 14-Reverse umbrella valve; 15-System mating interface; 16-Maze structure; 17-One-way valve structure; 18-Pre-separation structure. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0046] Example 1

[0047] This embodiment provides a breather valve with integrated air desiccant function, such as Figure 1-8 As shown, it includes: valve body 1, protective end cap 2, filter element assembly and one-way valve structure 17; the protective end cap 2 is connected to the valve body 1 to form a closed shell; the filter element assembly and one-way valve structure 17 are disposed inside the closed shell formed by the protective end cap 2 and the valve body 1, and the one-way valve structure 17 is disposed on the filter element assembly;

[0048] The valve body 1 is provided with a system interface 15 and a vent 12. The vent 12 is provided with a labyrinth structure 16. The system interface 15 is used to connect the breather valve and the sealing device. When the pressure in the sealing device rises, gas is introduced into the breather valve. When the pressure in the sealing device is less than atmospheric pressure, external air is introduced into the sealing device to balance the pressure.

[0049] The labyrinth structure 16 prevents external liquid water from directly entering the breather valve, meeting the customer's waterproof rating requirements. Simultaneously, the labyrinth structure 16 also possesses a certain oil-gas separation capability, effectively reducing system emissions.

[0050] The filter element assembly includes: filter element end cap 4, filter paper 5, filter element body 6 and sealing cap 10; the filter element body 6 is filled with desiccant 8 and fixed by breathable non-woven fabric 7; the filter element end cap 4, filter element body 6 and sealing cap 10 are connected in sequence.

[0051] The filter paper 5 is used to filter oil stains inside the system. When the system is under positive pressure and needs to be vented, the filter paper 5 needs to filter oil and gas components to prevent oil and gas from being discharged and polluting the air and to prevent the loss of internal media due to excessive air permeability; at the same time, when the system is under negative pressure, it filters impurities in the outside air to prevent external stains from entering the system and contaminating the internal media.

[0052] The filter element end cap 4 is used to fix the filter paper 5, which is wound around the filter element body 6. The filter element end cap 4 is connected to the system interface 15. When the system is under positive pressure, the gas to be filtered is introduced into the filter element assembly. At the same time, when the system is under negative pressure, external air is introduced into the system.

[0053] The desiccant 8 is used to control the humidity of external air entering the system, preventing excessive moisture from entering the system and diluting and contaminating the medium inside the system.

[0054] The one-way valve structure 17 is composed of a hole structure on the cover 10 and an umbrella valve 11. The umbrella valve 11 is located in the hole structure on the cover 10 to realize dual-channel diversion of positive pressure exhaust and negative pressure intake.

[0055] The working process of this utility model is as follows:

[0056] like Figure 3 As shown, when the internal pressure of the system rises due to working conditions or changes in external temperature, the breather valve can release the internal pressure in time. The gas inside the system enters the filter element assembly through the system interface 15. After passing through the filter paper 5, the gas enters the outer space of the filter element assembly and pushes open the forward umbrella valve 13. After passing through the labyrinth structure 16 on the protective end cover 2, the gas flows into the atmosphere through the vent 12. Under this condition, the reverse umbrella valve 14 is closed due to pressure.

[0057] like Figure 4 As shown, when the internal pressure of the system drops due to operation or changes in external temperature, external air flows into the labyrinth structure 16 on the protective end cover 2 through the vent 12 and enters the top space of the valve body 1. The air pushes open the reverse umbrella valve 14 and enters the desiccant chamber. After being dried by the desiccant 8, the air enters the outer space of the filter element assembly, and then enters the filter element assembly after being filtered by the filter paper 5. It enters the system from the system interface 15 to balance the pressure. Under this condition, the forward umbrella valve 13 is closed due to pressure.

[0058] Example 2

[0059] This embodiment provides a breather valve with integrated air desiccant function, such as Figure 1-8 As shown, it includes: valve body 1, protective end cap 2, filter element assembly and one-way valve structure 17; the protective end cap 2 is connected to the valve body 1 to form a closed shell; the filter element assembly and one-way valve structure 17 are disposed inside the closed shell formed by the protective end cap 2 and the valve body 1, and the one-way valve structure 17 is disposed on the filter element assembly;

[0060] The valve body 1 is provided with a system interface 15 and a vent 12. The vent 12 is provided with a labyrinth structure 16. The system interface 15 is used to connect the breather valve and the sealing device. When the pressure in the sealing device rises, gas is introduced into the breather valve. When the pressure in the sealing device is less than atmospheric pressure, external air is introduced into the sealing device to balance the pressure.

[0061] The labyrinth structure 16 prevents external liquid water from directly entering the breather valve, meeting the customer's waterproof rating requirements. Simultaneously, the labyrinth structure 16 also possesses a certain oil-gas separation capability, effectively reducing system emissions.

[0062] The filter element assembly includes: filter element end cap 4, filter paper 5, filter element body 6 and sealing cap 10; the filter element body 6 is filled with desiccant 8 and fixed by breathable non-woven fabric 7; the filter element end cap 4, filter element body 6 and sealing cap 10 are connected in sequence.

[0063] The filter paper 5 is used to filter oil stains inside the system. When the system is under positive pressure and needs to be vented, the filter paper 5 needs to filter oil and gas components to prevent oil and gas from being discharged and polluting the air and to prevent the loss of internal media due to excessive air permeability; at the same time, when the system is under negative pressure, it filters impurities in the outside air to prevent external stains from entering the system and contaminating the internal media.

[0064] The filter element end cap 4 is used to fix the filter paper 5, which is wound around the filter element body 6. The filter element end cap 4 is connected to the system interface 15. When the system is under positive pressure, the gas to be filtered is introduced into the filter element assembly. At the same time, when the system is under negative pressure, external air is introduced into the system.

[0065] The desiccant 8 is used to control the humidity of external air entering the system, preventing excessive moisture from entering the system and diluting and contaminating the medium inside the system.

[0066] The one-way valve structure 17 is composed of a hole structure on the cover 10 and an umbrella valve 11. The umbrella valve 11 is located in the hole structure on the cover 10 to realize dual-channel diversion of positive pressure exhaust and negative pressure intake.

[0067] In a specific embodiment, the filter element end cap 4 is provided with a pre-separation structure 18, which is used to initially separate large molecular particles in the gas and return the separation medium to the system. This reduces excessive loss of the medium; at the same time, the gas undergoes pre-separation treatment to prevent excessive medium from contacting the filter paper, which can extend the life of the filter element assembly as much as possible.

[0068] In a specific embodiment, the pre-separation structure 18, a cyclone separation structure, is located on the inner end face of the filter element end cover 4. Specifically, it includes radially distributed spiral guide vanes, a central return hole, and a flow channel.

[0069] In a specific implementation, the system interface 15 is equipped with an interface sealing ring 3, which cooperates with the valve body 1 and the filter element end cap 4 to achieve the isolation function between the dirty and clean sides of the breather valve filter element assembly. The sealing form and arrangement can be optimized according to the customer's boundary and assembly requirements.

[0070] In a specific embodiment, the filter element body 6 has a mesh structure. The lower structure of the filter element body 6 is used to wind, support and fix the filter paper 5, and the upper structure of the filter element body 6 is used to fix and support the breathable nonwoven fabric 7.

[0071] In a specific embodiment, the breathable nonwoven fabric 7 is arranged on the upper structure of the filter element body 6, possessing a certain degree of breathability and strength to ensure that the desiccant 8 will not leak due to any impact force. Simultaneously, the strength and breathability are adjusted according to the resistance requirements of the filter element assembly. The cap 10, in conjunction with the filter element body 6 and the breathable nonwoven fabric 7, fixes the filled desiccant 8 to the upper end of the filter element assembly, enabling it to dry the external air.

[0072] In a specific embodiment, the cover 10 is provided with a protective sealing ring 9, which cooperates with the valve body 1 and the cover 10 to achieve the isolation function of the area before and after air drying.

[0073] In a specific embodiment, the umbrella valve 11 includes a forward umbrella valve 13 and a reverse umbrella valve 14.

[0074] In a specific embodiment, the cover 10 has a circular cross-section and multiple hole structures on the cover 10, with one hole structure at the center and multiple hole structures symmetrically distributed around the center on the circumference.

[0075] In a specific implementation, the maze structure 16 consists of multiple levels of winding channels, including three or more Z-shaped return channels.

[0076] The working process of this utility model is as follows:

[0077] like Figure 3 As shown, when the internal pressure of the system rises due to working conditions or changes in external temperature, the breather valve can release the internal pressure in time. The gas inside the system enters the filter element assembly after passing through the system interface 15 and the pre-separation structure 18. After passing through the filter paper 5, the gas enters the outer space of the filter element assembly and pushes open the forward umbrella valve 13. After passing through the labyrinth structure 16 on the protective end cover 2, it flows into the atmosphere through the vent 12. Under this condition, the reverse umbrella valve 14 is closed due to pressure.

[0078] like Figure 4As shown, when the internal pressure of the system drops due to operation or changes in external temperature, external air flows into the labyrinth structure 16 on the protective end cover 2 through the vent 12 and enters the top space of the valve body 1. The air pushes open the reverse umbrella valve 14 and enters the desiccant chamber. After being dried by the desiccant 8, the air enters the outer space of the filter element assembly, then passes through the filter paper 5 and enters the interior of the filter element assembly. After flowing through the pre-separation structure 18, it enters the system through the system interface 15 for pressure balance. Under this condition, the forward umbrella valve 13 is closed due to pressure.

[0079] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0080] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A breather valve integrating an air desiccant function, characterized in that, include: Valve body (1), protective end cap (2), filter element assembly and one-way valve structure (17); the protective end cap (2) is connected to the valve body (1) to form a closed shell; the filter element assembly and one-way valve structure (17) are disposed inside the closed shell formed by the protective end cap (2) and the valve body (1), and the one-way valve structure (17) is disposed on the filter element assembly; The valve body (1) is provided with a system interface (15) and a vent (12), and the vent (12) is provided with a labyrinth structure (16); The filter element assembly includes: a filter element end cap (4), filter paper (5), a filter element body (6), and a sealing cap (10); the filter element body (6) is filled with a desiccant (8) and fixed by a breathable non-woven fabric (7); the filter element end cap (4), the filter element body (6), and the sealing cap (10) are connected in sequence; the filter element end cap (4) is used to fix the filter paper (5), the filter paper (5) is wound around the filter element body (6), and the filter element end cap (4) is connected to the system interface (15); The one-way valve structure (17) consists of a hole structure on the cover (10) and an umbrella valve (11). The umbrella valve (11) is located in the hole structure on the cover (10) to realize dual-channel diversion of positive pressure exhaust and negative pressure intake.

2. The breather valve with integrated air desiccant function according to claim 1, characterized in that, The filter end cap (4) is provided with a pre-separation structure (18) for initially separating large molecular particles in the gas and returning the separation medium to the system.

3. A breather valve integrating air desiccant function according to claim 2, characterized in that, The pre-separation structure (18) is a cyclone separation structure located on the inner end face of the filter element end cap (4).

4. A breather valve with integrated air desiccant function according to claim 1, characterized in that, The system is provided with an interface sealing ring (3) at the interface (15). The interface sealing ring (3) cooperates with the valve body (1) and the filter element end cap (4) to realize the isolation function between the dirty side and the clean side of the breathing valve filter element assembly.

5. A breather valve integrating air desiccant function according to claim 1, characterized in that, The filter element body (6) has a mesh structure. The lower structure of the filter element body (6) is used to wind, support and fix the filter paper (5), and the upper structure of the filter element body (6) is used to fix and support the breathable nonwoven fabric (7).

6. A breather valve integrating air desiccant function according to claim 1, characterized in that, The breathable nonwoven fabric (7) is arranged on the upper structure of the filter body (6) to ensure that the desiccant (8) will not leak due to some kind of impact force.

7. A breather valve integrating air desiccant function according to claim 1, characterized in that, The cover (10) is provided with a protective sealing ring (9), which cooperates with the valve body (1) and the cover (10) to realize the isolation function of the area before and after air drying.

8. A breather valve with integrated air desiccant function according to claim 1, characterized in that, The umbrella valve (11) includes a forward umbrella valve (13) and a reverse umbrella valve (14).

9. A breather valve with integrated air desiccant function according to claim 1, characterized in that, The cover (10) has a circular cross-section and multiple hole structures on the cover (10). There is one hole structure at the center of the circle, and multiple hole structures are distributed symmetrically about the center of the circle.

10. A breather valve integrating air desiccant function according to claim 1, characterized in that, The maze structure (16) consists of multiple levels of winding passages, including three or more Z-shaped return passages.

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