Bidirectional moisture barrier and air permeable valve

Abstract

The utility model discloses a kind of two-way moisture-proof breather valve, including valve body, the inner cavity of valve body is provided with first step and second step, and the third step for placing inner reset spring, sealing gasket and the sealing guide cover that inner reset spring is pressed against are mutually close contact, sealing gasket and the inner wall of valve body have gap, sealing guide cover and the inner wall of valve body have gap for passing gas, sealing guide cover and sealing gasket have gap for passing gas in vertical direction;Outer reset spring is installed on sealing gasket, outer reset spring is pressed by spring fixed cover, E-PTFE membrane is installed on spring fixed cover, dust cover is tightly pressed on E-PTFE membrane, and air hole is provided on dust cover.This new structure can realize two-way airflow balance, enhance waterproof performance, inhibit condensation inside cavity.Moreover, by setting double reset spring, opening pressure is low, sensitivity is good, and can meet the use demand of complex working condition such as high temperature and high humidity.

Description

Technical Field

[0001] This utility model relates to the field of pressure control technology for electric drive equipment, and in particular to a bidirectional moisture-proof and breathable valve. Background Technology

[0002] In the field of pressure control for electric drive equipment, pressure relief valves are key components to ensure the safe operation of equipment. Currently, most mainstream pressure relief valves on the market adopt a one-way pressure relief design.

[0003] This one-way pressure relief structure cannot achieve bidirectional airflow balance. When the internal temperature of the equipment changes, moisture in the air easily condenses inside the electric drive circuit, forming condensation. This not only affects the circuit insulation performance but also accelerates component aging and severely shortens the overall product lifespan. Furthermore, some pressure relief valves also suffer from excessively high opening pressure and poor environmental adaptability, making it difficult to meet the usage requirements of complex operating conditions such as high temperature and high humidity.

[0004] One-way valves are poorly designed to withstand water environments. When submerged, external moisture can easily breach the seal and enter the valve, interfering with its unidirectional flow performance. In applications with stringent sealing requirements, such as home appliances (e.g., washing machine inlet systems, dishwasher drain pipes) or automobiles (e.g., cooling circulation pipes, water-contact component connections), one-way valves are generally less adaptable to water environments due to cost constraints or miniaturization. When leaks occur, or the valve comes into contact with water or becomes completely submerged, its rubber seals can expand and deform due to prolonged immersion, or the sealing surface can be worn down by impurities in the water, leading to seal failure and allowing external water to seep into the valve. This not only compromises the valve's core function of allowing only unidirectional fluid flow (e.g., backflow in washing machines, coolant leakage in automotive cooling systems), but can also allow moisture to enter critical internal components, causing more serious malfunctions such as burnt-out circuits in home appliances or corrosion of automotive pipes, increasing maintenance costs and safety hazards. Utility Model Content

[0005] The purpose of this invention is to provide a bidirectional moisture-proof and breathable valve to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical measures: a bidirectional moisture-proof and breathable valve, comprising a valve body as the main component, characterized in that: the inner cavity of the valve body is provided with a first step for placing a sealing gasket, a second step for placing a spring fixing cover, and a third step for placing an inner return spring; the sealing gasket and the sealing guide cover abutting the inner return spring are in close contact with each other; a gap is left between the sealing gasket and the inner wall of the valve body for gas to pass through; a gap is left between the sealing guide cover and the inner wall of the valve body for gas to pass through; a gap is left perpendicularly between the sealing guide cover and the sealing gasket for gas to pass through; an outer return spring is installed on the sealing gasket; the outer return spring is pressed by a spring fixing cover; an E-PTFE membrane is installed on the spring fixing cover; a dust cover is tightly pressed on the E-PTFE membrane; and a vent hole is provided on the dust cover.

[0007] Compared with existing technologies, the advantages of this invention are as follows: This novel structure can achieve bidirectional airflow balance, enhance waterproof performance, and suppress condensation inside the cavity. Furthermore, by incorporating double reset springs, it features low opening pressure and high sensitivity, meeting the application requirements of complex working conditions such as high temperature and high humidity.

[0008] As an improvement of this utility model, a metal gasket is tightly attached to the sealing gasket. The purpose of this design is that, since the sealing gasket is relatively soft, attaching the metal gasket tightly to it can enhance its rigidity and make it more sensitive to opening.

[0009] As an improvement to this utility model, an internal sealing ring is provided between the dust cover and the spring fixing cover. The purpose of this design is to change the original surface-to-surface contact sealing to a point-to-surface contact structure, which can further improve the sealing performance.

[0010] As an improvement to this utility model, the dust cover and the valve body are connected by threads to achieve compression of the E-PTFE membrane. The purpose of this design is that the threaded connection structure is simple and practical.

[0011] As an improvement to this invention, an external sealing ring is provided on the outer wall of the valve body. The purpose of this design is to enhance the sealing effect of the entire bidirectional moisture-proof and breathable valve. Attached Figure Description

[0012] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0013] In the attached diagram: Figure 1This is an exploded view of the bidirectional moisture-proof and breathable valve described in this utility model.

[0014] Figure 2 This is a cross-sectional view of the bidirectional moisture-proof and breathable valve described in this utility model.

[0015] Figure 3 This is a perspective view of the bidirectional moisture-proof and breathable valve described in this utility model.

[0016] Figure 4 This is a schematic diagram of the airflow path when the internal air pressure is high, as described in this utility model.

[0017] Figure 5 This is a schematic diagram of the airflow path when the external air pressure is high, as described in this utility model.

[0018] Figure 6 is a perspective view of the dust cover described in this utility model.

[0019] Figure 7 is a schematic diagram of the structure of the valve body and sealing gasket of this utility model.

[0020] Figure 8 This is a schematic diagram of the installation of the bidirectional moisture-proof and breathable valve described in this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Sealing gasket; 3. First step; 4. Spring fixing cover; 5. Second step; 6. Inner return spring; 7. Third step; 8. Sealing guide cover; 9. Outer return spring; 10. External threaded part; 11. E-PTFE membrane; 12. Dust cover; 13. Vent hole; 14. Hardware gasket; 15. Internal sealing ring; 16. External sealing ring; 17. Airflow path; 18. Two-way moisture-proof and breathable valve; 19. Sealing equipment cavity. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] Example 1 Please refer to Figure 1 -8.

[0024] This embodiment provides a bidirectional moisture-proof and breathable valve 18, which includes a valve body 1 as the main component. During operation, the valve body 1 is directly threaded to the sealing device cavity 19 through an external threaded portion 10.

[0025] In the embodiments of this utility model application, please refer to Figure 7The inner cavity of the valve body 1 is provided with a first step 3 for placing the sealing gasket 2, a second step 5 for placing the spring fixing cover 4, and a third step 7 for placing the inner return spring 6. The function of the sealing gasket 2 is to divide the interior of the bidirectional moisture-proof and breathable valve 18 into two cavities: the one closer to the sealing equipment cavity 19 is the internal air pressure environment, and the one farther away from the sealing equipment cavity 19 is the external air pressure environment. Under normal conditions, the air is separated by the sealing gasket 2.

[0026] In the embodiments of this utility model application, please refer to Figure 2 and Figure 7 The sealing gasket 2 and the sealing guide cover 8 pressed against by the inner return spring 6 are in close contact with each other. The sealing gasket 2 and the inner wall of the valve body 1 have a gap for gas to pass through. The sealing guide cover 8 and the inner wall of the valve body 1 have a gap for gas to pass through. The sealing guide cover 8 and the sealing gasket 2 have a gap in the vertical direction for gas to pass through.

[0027] In the embodiments of this utility model application, please refer to Figure 2 An external return spring 9 is installed on the sealing gasket 2. The external return spring 9 is pressed down by a spring fixing cover 4, which has a through hole in the middle for gas to pass through. An E-PTFE membrane 11 (i.e., a waterproof and breathable membrane) is installed on the spring fixing cover 4. A dust cover 12 is tightly pressed onto the E-PTFE membrane 11. The dust cover 12 is threadedly connected to the valve body 1 to achieve the compression of the E-PTFE membrane 11. This threaded connection structure is simple and practical. The function of the E-PTFE membrane 11 is to prevent dust, water, and liquid from penetrating, effectively protecting the internal structure of electronic components from corrosion, which is existing technology.

[0028] In the embodiments of this utility model application, please refer to Figure 6 The dust cover 12 is provided with a vent 13.

[0029] Furthermore, a metal gasket 14 is tightly attached to the sealing gasket 2. Since the sealing gasket 2 is relatively soft, attaching the metal gasket 14 tightly to it can enhance its rigidity and make it more sensitive to opening.

[0030] Furthermore, an internal sealing ring 15 is provided between the dust cover 12 and the spring fixing cover 4. This changes the original surface-to-surface contact sealing to a point-to-surface contact structure, which further improves the sealing performance.

[0031] Furthermore, an external sealing ring 16 is provided on the outer wall of the valve body 1 to enhance the sealing effect of the entire bidirectional moisture-proof and breathable valve 18.

[0032] It should be noted that the sealing rings and other materials are made of fluorosilicone rubber, which has strong environmental resistance and maintains good stability in environments with high temperature, low temperature, humidity, and chemicals.

[0033] Meanwhile, two return springs with different elastic force values ​​are used. The outer return spring 9 has an elastic force parameter of 0.3N, and the inner return spring 6 has an elastic force parameter of 0.15N. By utilizing the difference in elastic force between the two, the design goal of "high exhaust pressure and low intake pressure" is precisely achieved, ensuring that the airflow pressure is distributed in an orderly manner as required.

[0034] This embodiment provides a bidirectional moisture-proof and breathable valve 18. For normal use, please refer to... Figure 4 When the internal air pressure is too high, the sealing guide cover 8 moves upward, pushing open the sealing gasket 2. The outer return spring 9 will be compressed, and the gas inside the cavity will be discharged until the pressure difference between the inside and outside is zero. The airflow path 17 is shown in the figure. Figure 4 The arrow line.

[0035] Please refer to Figure 5 When the external air pressure is too high, the sealing guide cover 8, which was originally in close contact with the sealing gasket 2, moves downward, and the inner return spring 6 is compressed. External gas enters the sealing equipment cavity until the pressure difference between the inside and outside is zero. The airflow path 17 is shown in the figure. Figure 5 The arrow line.

[0036] The bidirectional moisture-proof and breathable valve provided by this utility model has two core advantages: first, it has a low opening pressure and a more sensitive response; second, it has a strong air intake pressure bearing capacity and is suitable for a wider range of scenarios.

[0037] The bidirectional moisture-proof and breathable valve, with its innovative structural design, successfully overcomes two major pain points of traditional valves in practical applications. Its optimized bidirectional pressure relief mechanism significantly improves waterproof performance. After being removed from water immersion environments, the valve effectively drains moisture that has seeped into the valve body from the outside, preventing component damage or functional failure caused by prolonged water immersion. Simultaneously, by regulating the air pressure balance between the device cavity and the outside environment through bidirectional conduction, it reduces temperature and humidity fluctuations caused by temperature differences between the inside and outside of the cavity, fundamentally inhibiting the formation of condensation inside the cavity. Condensation can not only affect the valve's unidirectional conduction accuracy but also corrode internal metal components, short-circuit related circuits, and shorten the overall lifespan of the device. The bidirectional moisture-proof and breathable valve's simultaneous solution to these two major problems significantly improves the reliability and durability of itself and related systems under complex operating conditions.

[0038] The beneficial effects of this invention are as follows: This novel structure can achieve bidirectional airflow balance, enhance waterproof performance, and suppress condensation inside the cavity. Furthermore, by incorporating double reset springs, it features low opening pressure and high sensitivity, meeting the application requirements of complex working conditions such as high temperature and high humidity.

[0039] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bidirectional moisture-proof and breathable valve, comprising a valve body (1) as a main component, characterized in that: The inner cavity of the valve body (1) is provided with a first step (3) for placing the sealing gasket (2), a second step (5) for placing the spring fixing cover (4), and a third step (7) for placing the inner return spring (6). The sealing gasket (2) and the sealing guide cover (8) abutted by the inner return spring (6) are in close contact with each other. The sealing gasket (2) and the inner wall of the valve body (1) are left with a gap for gas to pass through. The sealing guide cover (8) and the inner wall of the valve body (1) are in close contact with each other. The wall has a gap for gas to pass through, and the sealing guide cover (8) and the sealing gasket (2) have a gap for gas to pass through in the vertical direction; an external return spring (9) is installed on the sealing gasket (2), and the external return spring (9) is pressed by the spring fixing cover (4). An E-PTFE membrane (11) is installed on the spring fixing cover (4), and a dust cover (12) is pressed tightly on the E-PTFE membrane (11). A vent hole (13) is provided on the dust cover (12).

2. The bidirectional moisture-proof and breathable valve according to claim 1, characterized in that: The sealing gasket (2) is tightly attached to the metal gasket (14).

3. The bidirectional moisture-proof and breathable valve according to claim 1, characterized in that: An internal sealing ring (15) is provided between the dust cover (12) and the spring fixing cover (4).

4. The bidirectional moisture-proof and breathable valve according to claim 1, characterized in that: The dust cover (12) is connected to the valve body (1) by a thread to press the E-PTFE membrane (11).

5. The bidirectional moisture-proof and breathable valve according to claim 1, characterized in that: An external sealing ring (16) is provided on the outer wall of the valve body (1).

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