Two-way ventilation valve

Abstract

The utility model relates to a two-way ventilation valve which comprises a ventilation valve body, an air inlet channel and an air outlet channel which are independent of each other are arranged in the ventilation valve body, a ventilation membrane assembly is further arranged at the end, communicated with the outside, of the air inlet channel, and one-way valve assemblies are arranged in the air inlet channel and the air outlet channel respectively. And the air flow directions in the air inlet passage and the air outlet passage are opposite. An air inlet passage and an exhaust passage are separated, so that bidirectional ventilation of the cavity is realized, and positive pressure and negative pressure in the cavity can be controlled within a certain range; the air inlet passage is provided with the breathable diaphragm assembly, so that the structure can be used for environments such as a transmission and an oil-cooled motor, and can isolate water vapor and prevent the water vapor from entering the motor to cause condensation; meanwhile, due to the one-way valve in the air inlet pipeline, the diaphragm cannot bear pressure impact, and the service life of the diaphragm can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air-permeable valve design, and in particular to a double-channel air-permeable valve. Background Art

[0002] The oil-cooled motors and electronic control equipment of electric vehicles must be protected from droplets, dust and other pollutants, otherwise it will damage the electronic components or rotating parts, thereby reducing their service life. Some equipment is often affected by the external environment temperature and pressure fluctuations during use. When the protective box is in an absolutely closed state, there will be a problem of internal and external pressure imbalance. When the equipment is working, the internal electronic components generate heat, causing the air in the shell to heat up and expand. If the gas cannot be discharged in time, the pressure in the box will continue to increase and accumulate in the weakest part of the shell. When the equipment stops working or the temperature drops, the internal pressure will drop due to the breathing effect to form a negative pressure. These situations will have an adverse effect on the performance of the equipment.

[0003] In order to solve the above problems, waterproof and breathable valves are often introduced into the equipment to prevent water, pollution, and balance the internal and external pressures. Currently, there are mainly three types of traditional breathable valves:

[0004] 1. Normally open breathable valve: Normally open ventilation is achieved by setting a vent pipe at a higher position of the assembly; the normally open breathable valve can fully balance the cavity pressure on both sides of the breathable valve, but has no ability to isolate external water vapor;

[0005] 2. Normally closed breathable valve: realized by spring and sealing gasket; the normally closed breathable valve is only one-way breathable, which can isolate the water vapor outside and control the exhaust pressure, but it can only be opened when the pressure in the inner cavity is greater than that in the outside, and there may be negative pressure in the inner cavity that cannot be balanced;

[0006] 3. Diaphragm type breathable valve: Through a special waterproof breathable membrane, ventilation and water vapor isolation functions are achieved; the diaphragm type breathable valve is limited by the diaphragm material, and oil will block the diaphragm vents, so it should be avoided in an oil environment.

[0007] In summary, the above three types of air vents all have defects and cannot meet the use requirements of oil-cooled motors. Therefore, there is an urgent need for a air vent valve that can meet the use conditions of oil-cooled motors. Summary of the invention

[0008] In order to solve the above technical problems, the purpose of the utility model is to provide a dual-channel vent valve with a simple structure, reliable performance and meeting the working conditions of the motor.

[0009] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0010] A dual-pathway air valve comprises an air valve body, wherein the air valve body is provided with an independent air intake path and an air exhaust path, wherein one end of the air intake path connected to the outside is also provided with an air permeable membrane assembly, and wherein the air intake path and the air exhaust path are respectively provided with a one-way valve assembly, so that the airflow directions in the air intake path and the air exhaust path are opposite.

[0011] As a preferred solution: a ventilation pressure ring is also embedded and fixed at the place where the intake passage or the exhaust passage is connected to the outside world, and the one-way valve assembly includes a spring, a pressure plate and a sealing gasket which are abutted against each other in sequence, and the sealing gasket in the intake passage abuts against the ventilation pressure ring, the spring abuts against the step surface in the intake passage, the sealing gasket in the exhaust passage abuts against the step surface in the exhaust passage, and the spring abuts against the ventilation pressure ring.

[0012] As a preferred solution: the breathable membrane assembly is embedded and fixed at the end of the breathable valve body.

[0013] As a preferred solution: a valve cap is also buckled on the breathable valve body, and the valve cap is located outside the breathable membrane assembly, and a gap is left between the valve cap and the breathable valve body.

[0014] As a preferred solution: an oil-proof component is also provided at one end of the exhaust passage connected to the equipment.

[0015] As a preferred solution: the oil-proof component is in the shape of a hollow cylinder, and a plurality of partitions are arranged at intervals and staggered along the axial direction on the inner wall of the cylinder.

[0016] As a preferred solution: the openings of the air intake passage and the air exhaust passage communicating with the outside are respectively located on two end surfaces of the air permeable valve body.

[0017] As a preferred solution: the air intake passage is in a straight strip shape, and the exhaust passage is in an inverted L shape.

[0018] As a preferred solution: a ring groove is further provided at the middle and lower part of the air-permeable valve body, and a sealing ring is further provided in the ring groove.

[0019] As a preferred solution: the air-permeable valve body is machined or injection molded, the pressing plate and the sealing gasket are connected by interference fit, or the sealing gasket is formed by directly vulcanizing rubber on the surface of the pressing plate.

[0020] The utility model separates the air intake passage from the exhaust passage, realizes two-way ventilation of the cavity, and can control the positive pressure and negative pressure inside the cavity within a certain range; and a breathable diaphragm assembly is arranged on the air intake passage, and this structure can be used in environments such as transmissions and oil-cooled motors, and can isolate water vapor and prevent water vapor from entering the motor and causing condensation; at the same time, due to the presence of a one-way valve in the air intake pipeline, the diaphragm will not be subjected to pressure shock, and the service life of the diaphragm can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0025] The accompanying drawings are marked as follows: 1. breathable valve body; 2. valve cap; 3. sealing ring; 4. oil-proof component; 5. breathable membrane component; 6. pressure plate; 7. spring; 8. ventilation pressure ring; 9. sealing gasket; 11. air intake passage; 12. exhaust passage. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0033] like Figures 1 to 3 A dual-path breathable valve is shown, comprising a breathable valve body 1, wherein the breathable valve body 1 is provided with an independent intake passage 11 and an exhaust passage 12, wherein the intake passage 11 and the exhaust passage 12 are respectively provided with a one-way valve assembly, so that the airflow directions in the intake passage 11 and the exhaust passage 12 are opposite.

[0034] A ventilation pressure ring 8 is also embedded and fixed at the place where the intake passage 11 or the exhaust passage 12 is connected to the outside. The one-way valve assembly includes a spring 7, a pressure plate 6 and a sealing gasket 9 that are abutted against each other in sequence, and the sealing gasket 9 in the intake passage 11 abuts against the ventilation pressure ring 8, the spring abuts against the step surface in the intake passage 11, the sealing gasket 9 in the exhaust passage 12 abuts against the step surface in the exhaust passage 12, and the spring abuts against the ventilation pressure ring 8.

[0035] The air-permeable valve body 1 is machined or injection molded, and the pressing plate 6 is connected to the sealing gasket 9 by interference fit, or the sealing gasket 9 is directly molded on the surface of the pressing plate 6 by vulcanizing rubber.

[0036] The end of the air inlet passage 11 communicating with the outside is also provided with a breathable membrane assembly 5, and the breathable membrane assembly 5 is embedded and fixed at the end of the breathable valve body 1. The breathable valve body 1 is also provided with a valve cap 2, and the valve cap 2 is located outside the breathable membrane assembly 5, and a gap is left between the valve cap 2 and the breathable valve body 1. The valve cap is formed by stamping, and can also be connected to the body and prevented from falling off by processes such as bottom riveting or welding bonding;

[0037] The end of the exhaust passage 12 connected to the equipment is also provided with an oil-proof component 4. The oil-proof component 4 is a hollow cylinder, and a plurality of partitions are arranged at intervals along the axial direction on the inner wall of the cylinder. There can be two oil-proof components 4, which are superimposed on each other in the longitudinal direction, and the curved and rotating internal path can effectively block grease on the partition.

[0038] The openings of the air intake passage 11 and the air exhaust passage 12 communicating with the outside are respectively located at two end surfaces of the air-permeable valve body 1. The air intake passage 11 is in a straight strip shape, and the air exhaust passage 12 is in an inverted L shape.

[0039] The middle and lower part of the breathable valve body 1 is also provided with a ring groove, and the ring groove is also provided with a sealing ring 3. The breathable valve is matched with the connecting piece hole through the bottom thread, and the sealing ring is used to realize the sealing function between the connecting piece and the connecting piece.

[0040] like Figure 2 As shown, the working principle of the breathable valve of the utility model is as follows:

[0041] 1. Exhaust passage: When the pressure in the cavity is greater than the external pressure, the thrust generated by the pressure difference overcomes the spring force and pushes the sealing gasket to the left to open the exhaust passage. When the pressure outside is greater than the pressure in the cavity, due to the pressure difference and the spring, the sealing gasket will move to the right to contact and seal with the step surface in the exhaust passage 12, thereby blocking the exhaust passage.

[0042] 2. Intake passage: When the pressure in the cavity is lower than the external pressure, the thrust generated by the pressure difference overcomes the spring force, pushing the sealing gasket down to open the intake passage. At the same time, the incoming gas must first pass through the breathable membrane to achieve water vapor filtration; when the pressure in the cavity is greater than the pressure outside, due to the action of the pressure difference and the spring, the sealing gasket will move up to contact and seal with the ventilation pressure ring, thereby blocking the intake passage;

[0043] The utility model has independent design parameters for the intake passage and the exhaust passage, so that the intake and exhaust pressures can be separately and controllably adjusted.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dual-channel vent valve, characterized in that: The invention comprises a breathable valve body (1), wherein the breathable valve body (1) is provided with an air intake passage (11) and an air exhaust passage (12) which are independent of each other, wherein one end of the air intake passage (11) which is in communication with the outside is also provided with a breathable membrane assembly (5), and wherein the air intake passage (11) and the air exhaust passage (12) are respectively provided with a one-way valve assembly, so that the airflow directions in the air intake passage (11) and the air exhaust passage (12) are opposite.

2. A dual-channel vent valve according to claim 1, characterized in that: A vent pressure ring (8) is also embedded and fixed at the place where the intake passage (11) or the exhaust passage (12) is connected to the outside. The one-way valve assembly includes a spring (7), a pressure plate (6) and a sealing gasket (9) that are abutted against each other in sequence. The sealing gasket (9) in the intake passage (11) abuts against the vent pressure ring (8), the spring abuts against the step surface in the intake passage (11), the sealing gasket (9) in the exhaust passage (12) abuts against the step surface in the exhaust passage (12), and the spring abuts against the vent pressure ring (8).

3. A dual-channel vent valve according to claim 1, characterized in that: The air permeable membrane assembly (5) is embedded and fixed at the end of the air permeable valve body (1).

4. A dual-channel vent valve according to claim 1, characterized in that: A valve cap (2) is also buckled onto the breathable valve body (1), and the valve cap (2) is located outside the breathable membrane assembly (5), with a gap left between the valve cap (2) and the breathable valve body (1).

5. A dual-channel vent valve according to claim 1, characterized in that: An oil-proof component (4) is also provided at one end of the exhaust passage (12) that is in communication with the equipment.

6. A dual-channel vent valve according to claim 5, characterized in that: The oil-proof component (4) is in the shape of a hollow cylinder, and a plurality of partitions are arranged at intervals and staggered along the axial direction on the inner wall of the cylinder.

7. A dual-channel vent valve according to claim 1, characterized in that: The openings of the air intake passage (11) and the air exhaust passage (12) communicating with the outside are respectively located on two end surfaces of the air permeable valve body (1).

8. A dual-channel vent valve according to claim 1, characterized in that: The air intake passage (11) is in a straight strip shape, and the exhaust passage (12) is in an inverted L shape.

9. A dual-channel vent valve according to claim 1, characterized in that: A ring groove is also provided at the middle and lower part of the air-permeable valve body (1), and a sealing ring (3) is also provided in the ring groove.

10. A dual-channel vent valve according to claim 2, characterized in that: The air-permeable valve body (1) is machined or injection molded, and the pressing plate (6) and the sealing gasket (9) are connected by interference fit, or the sealing gasket (9) is formed by directly vulcanizing rubber on the surface of the pressing plate (6).

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