CN218679590U

CN218679590U - Metal ventilation valve

Info

Publication number: CN218679590U
Application number: CN202222568525.8U
Authority: CN
Inventors: 魏太演; 张文飞; 张贻深; 林井祥; 熊勇
Original assignee: Spider Xiamen S&t Co ltd
Current assignee: Spider Xiamen S&t Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-03-21
Anticipated expiration: 2032-09-27

Abstract

The utility model relates to a ventilation valve field discloses a metal ventilation valve, including mount pad, ventilated membrane and ventilative lid. The breathable cover is arranged on the mounting seat, a through cavity is arranged in the middle of the mounting seat, a first breathable hole communicated with the cavity is formed in the side face of the breathable cover, the breathable film is arranged at the upper end of the cavity, the cavity is separated from the air path of the first breathable hole, the waterproof, breathable and dustproof effects are achieved, and the effect of balancing the internal pressure and the external pressure of the shell of the electronic equipment is achieved. The side edge of the mounting seat is further provided with a second air hole communicated with the cavity, a sealing plug for separating an air path between the cavity and the second air hole is movably arranged between the second air hole and the cavity, a compression spring is arranged between the sealing plug and the bottom end of the ventilation cover, and the second air hole is arranged between the bottom end of the ventilation cover and the sealing plug.

Description

Metal ventilation valve

Technical Field

The utility model belongs to the technical field of the ventilation valve and specifically relates to a metal ventilation valve.

Background

In general, a large number of outdoor electronic devices are used in the fields and industries of lighting, solar energy and telecommunication systems, as well as in the fields of heavy machinery, transportation or safety/monitoring equipment, new energy automobile motor electric control systems, lithium battery pack bags, inverters, electric push rod machines, wiper motors and the like. The sealed and sensitive electronic equipment shell and container are very fragile, and along with the change of the external environment, such as the change of temperature or height, the alternative change of high temperature or low temperature, the alternative change of seasons, and the positive and negative stress generated by releasing or adsorbing gas due to chemical reaction, the stress acts on the sealing ring of the shell, so that the sealing element is easy to lose efficacy, condensation and pollution are generated, and leakage and structural faults are easy to occur.

In order to solve the above problems, a waterproof vent valve is usually installed on the electronic device. The materials of the metal vent valve which is commonly used at present mainly comprise stainless steel, aluminum alloy, brass and the like. The conventional method is to integrate the breathable film on the metal main body in a back adhesive mode or a mechanical force pressing mode, and the integration of the mode can really achieve the effects of balancing internal and external pressure difference and preventing water, gas and dust, but for some batteries with large calorific value or similar to lithium ion batteries which abnormally emit a large amount of heat and gas, the conventional breathable valve cannot meet the use requirements for the large amount of heat and gas.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the prior vent valve can not discharge a large amount of heat and gas in a short time, and provides a metal vent valve which not only can play the roles of water resistance, ventilation and dust resistance for sensitive electronic equipment, but also can realize the balance of the internal and external pressures of the shell of the electronic equipment; and when the electronic equipment works and generates too much heat, a large amount of heat and gas can be discharged in a short time, and the safety and the effectiveness of sensitive electronic equipment are ensured.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a metal ventilation valve, it includes mount pad, ventilated membrane and ventilative lid. A through cavity is arranged in the middle of the mounting seat, and a first air hole communicated with the cavity is formed in the side face of the air permeable cover. The ventilated membrane is arranged at the upper end of the cavity and separates the cavity from the air path of the first air vent. The breathable cover is arranged on the mounting seat and compresses the breathable film on the mounting seat. The main functions of the breathable film can effectively control the condensation phenomenon in the sensitive electronic equipment shell, realize the balance of internal and external pressure difference and prevent the shell from deforming and damaging a sealing piece; on the other hand, the invasion of impurities such as dust, water, pollen, etc. can be prevented.

The side edge of the mounting seat is also provided with a second air hole communicated with the cavity, and a sealing plug for separating an air path between the cavity and the second air hole is movably arranged between the second air hole and the cavity. And a compression spring is arranged between the sealing plug and the bottom end of the ventilation cover, and the second air hole is formed between the bottom end of the ventilation cover and the sealing plug. The compression spring, the sealing plug and the second air hole jointly form the function of the one-way valve. When the compression spring is in an initial state, the sealing plug is positioned below the second air hole, and the cavity is not communicated with the second air hole; when the compression spring is in an upward compression state, the sealing plug is positioned above the second air hole, and the cavity is communicated with the second air hole.

Further, the air permeability of the breathable film is 500-2500 ml/cm2/min @70mbar, and the protection grade is IP67, IP68 or IP69K.

Further, the breathable membrane comprises a PTFE porous waterproof breathable membrane layer and a support material layer. The ventilated membrane is a three-layer structure of a PTFE porous waterproof breathable membrane layer + a support material layer + a PTFE porous waterproof breathable membrane layer or a two-layer structure of the PTFE porous waterproof breathable membrane layer + a support material layer. The layers can be compounded by adopting a hot pressing or dispensing mode. Preferably, hot-pressing compounding is adopted, and a double-layer structure is adopted.

Further, the air permeability of the PTFE porous waterproof breathable membrane layer is 1000-2000 ml/cm2/min @70mbar, and the protection grade is IP67.

Further, the supporting material layer is one of polyester non-woven fabric, polypropylene square grid, nylon material, polyester taffeta fabric and taffeta fabric. Preferably, a polyester nonwoven fabric substrate having excellent aging resistance is used, and the thickness is 0.15 to 0.25mm.

Furthermore, a sealing gasket is arranged at the joint of the sealing plug and the mounting seat.

Furthermore, the lower end edge of the ventilation cover is provided with a mounting groove matched with the upper edge of the mounting seat. And the mounting groove of the ventilation cover is embedded into the upper end of the mounting seat for mechanical riveting.

Further, the lower extreme of mount pad is provided with the installation department that is used for fixing on electronic equipment. The mounting part is provided with threads or a buckle, and the threads or the buckle can be selected according to the opening condition of the shell of the electronic equipment.

Furthermore, an O-shaped ring is sleeved on the mounting part. The O-shaped ring can be made of silica gel, rubber, perfluoroether and the like, and mainly has a sealing effect.

Further, a coarse filter screen is arranged at the bottom of the cavity and is arranged below the second air hole. Prevent that big particulate matter from getting into the cavity, cover the ventilated membrane surface, make the ventilated membrane inefficacy.

The utility model discloses an useful part does:

the utility model discloses a set up the ventilated membrane between first bleeder vent and cavity, play waterproof, ventilative, dirt-proof effect to sensitive electronic equipment, realize the internal and external pressure balance of electronic equipment shell. Meanwhile, the second air hole, the compression spring and the sealing plug are arranged on the mounting seat, the compression spring, the sealing plug and the second air hole jointly form the function of the one-way valve, when the electronic equipment works and generates too much heat, the second air hole is opened, a large amount of heat and gas can be discharged in a short time, and the second air hole is closed again after a large amount of gas is discharged, so that the safety and the effectiveness of sensitive electronic equipment are ensured.

Drawings

Fig. 1 is a schematic structural view of the second vent of the present invention when closed.

Fig. 2 is a schematic structural view of the second vent when the second vent is opened.

Description of the main component symbols:

1. a mounting seat 11, a cavity 12 and a second air hole;

2. a breathable film 21, a PTFE porous waterproof breathable film layer 22 and a support material layer;

3. the air permeable cover 31, the first air permeable hole 32 and the mounting groove;

4. a sealing plug;

5. a compression spring;

6. sealing gaskets;

7. an O-shaped ring;

8. and (5) coarse filtering of the net.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, the utility model discloses a metal vent valve, which comprises a mounting seat 1, a breathable film 2 and a breathable cover 3.

The middle of the mounting seat 1 is provided with a through cavity 11, and the side surface of the ventilation cover 3 is provided with a first ventilation hole 31 communicated with the cavity 11. The air permeable film 2 is arranged at the upper end of the cavity 11 and separates the cavity 11 from the air path of the first air vent 31. The lower end edge of the ventilation cover 3 is provided with a mounting groove 32 matched with the upper edge of the mounting seat 1. The mounting groove 32 of the breathable cover 3 is embedded in the upper end of the mounting seat 1, mechanical riveting is carried out, and the breathable film 2 is tightly pressed on the mounting seat 1. The main functions of the breathable film 2 can effectively control the condensation phenomenon inside the sensitive electronic equipment shell, realize the balance of internal and external pressure difference, and prevent the shell from deforming and damaging a sealing piece; on the other hand, the invasion of impurities such as dust, water, pollen, etc. can be prevented.

The side of the mounting seat 1 is also provided with a second air hole 12 communicated with the cavity 11, and a sealing plug 4 for separating an air path between the cavity 11 and the second air hole 12 is movably arranged between the second air hole 12 and the cavity 11. A compression spring 5 is arranged between the bottom ends of the sealing plug 4 and the ventilation cover 3, and a second ventilation hole 12 is arranged between the bottom end of the ventilation cover 3 and the sealing plug 4. The compression spring 5, the sealing plug 4 and the second air hole 12 jointly form the function of a one-way valve. When the compression spring 5 is in an initial state, the sealing plug 4 is positioned below the second air hole 12, and the cavity 11 is not communicated with the second air hole 12; when the compression spring 5 is in an upward compression state, the sealing plug 4 is positioned above the second air hole 12, and the cavity 11 is communicated with the second air hole 12.

When in use:

as shown in fig. 2, when the vent valve is installed on the casing of the electronic device, if the heat generation amount inside the casing is not high, a positive pressure is generated inside the casing, and this pressure promotes the gas inside the casing to be discharged to the first vent hole 31 through the vent membrane 2, so as to balance the pressure difference inside and outside the casing. It is noted that the stress generated in the case is not enough to lift the compression spring 5, so that the gas is not freely introduced into and discharged from the second vent hole 12.

As shown in fig. 1, when the electronic device is heated greatly or the electronic components inside the housing are abnormal to release a large amount of heat or gas, a great pressure is generated inside the housing, and the pressure is enough to compress the compression spring 5, so that the sealing plug 4 is pushed above the position of the second vent hole 12. At this time, the main heat and gas are rapidly discharged through the second vent hole 12, releasing pressure to the inside of the case.

Once the pressure inside the casing is released, the pressure becomes small, the elastic force of the compression spring 5 is enough to overcome the stress inside the casing, the sealing plug 4 is pressed against the sealing gasket 6, and the gas inside the casing is mainly exchanged through the gas permeable membrane 2 and the first gas permeable hole 31.

Wherein the air permeability of the breathable film 2 is 500-2500 ml/cm2/min @70mbar, and the protection grade is IP67, IP68 or IP69K.

The breathable film 2 comprises a PTFE porous waterproof breathable film layer 21 and a support material layer 22. The breathable film 2 can be designed to be a three-layer structure, specifically, the upper end face and the lower end face of the support material layer 22 are both provided with the PTFE porous waterproof breathable film layer 21, or a two-layer structure, specifically, only one end face of the support material layer 22 is provided with the PTFE porous waterproof breathable film layer 21. The layers can be compounded by adopting a hot pressing or dispensing mode. Preferably, a hot-pressing composite process is adopted, and the structure adopts a double-layer structure.

The air permeability of the PTFE porous waterproof air-permeable membrane layer 21 is 1000-2000 ml/cm2/min @70mbar, and the protection grade is IP67. The preparation process of the PTFE porous waterproof breathable membrane layer 21 can be prepared by the process method disclosed by the invention patent of the CN110982203 breathable valve.

The support material layer 22 is one of polyester non-woven fabric, polypropylene square grid, nylon material, polyester taffeta fabric and taffeta fabric. The support material layer 22 is preferably a polyester nonwoven fabric substrate having excellent aging resistance and has a thickness of 0.15 to 0.25mm.

For better sealing, a sealing gasket 6 is arranged at the joint of the sealing plug 4 and the mounting seat 1.

Wherein, the lower extreme of mount pad 1 is provided with the installation department that is used for fixing on electronic equipment. The mounting part is provided with a thread or a buckle which can be selected according to the condition of an opening on the shell of the electronic equipment.

The mounting part is sleeved with an O-shaped ring 7. The O-shaped ring 7 can be made of silica gel, rubber, perfluoroether and the like, and mainly has a sealing effect.

In order to prevent large particles from entering the cavity 11, the surface of the breathable film 2 is covered, so that the breathable film 2 is ineffective. The bottom of the cavity 11 is provided with a coarse filter screen 8, and the coarse filter screen 8 is arranged below the second air holes 12.

To sum up, the utility model not only can play the waterproof, breathable and dustproof roles to the sensitive electronic equipment, and realize the internal and external pressure balance of the shell of the electronic equipment; and when the electronic equipment works and generates too much heat, a large amount of heat and gas can be discharged in a short time, and the safety and the effectiveness of sensitive electronic equipment are ensured.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A metal purge valve characterized by: comprises a mounting seat, a ventilated membrane and a ventilated cover; the ventilating cover is arranged on the mounting seat; a through cavity is arranged in the middle of the mounting seat, and a first air hole communicated with the cavity is formed in the side surface of the air permeable cover; the air permeable membrane is arranged at the upper end of the cavity and separates the cavity from the air path of the first air vent; a second air hole communicated with the cavity is further formed in the side edge of the mounting seat, and a sealing plug for separating an air path between the cavity and the second air hole is movably arranged between the second air hole and the cavity; and a compression spring is arranged between the sealing plug and the bottom end of the ventilation cover, and the second air hole is formed between the bottom end of the ventilation cover and the sealing plug.

2. The metal purge valve of claim 1, wherein: the air permeability of the breathable film is 500-2500 ml/cm < 2 >/min @70mbar, and the protection grade is IP67, IP68 or IP69K.

3. The metal purge valve of claim 2, wherein: the breathable film comprises a PTFE porous waterproof breathable film layer and a support material layer; the ventilated membrane is a three-layer structure of a PTFE porous waterproof breathable membrane layer + a support material layer + a PTFE porous waterproof breathable membrane layer or a two-layer structure of the PTFE porous waterproof breathable membrane layer + a support material layer.

4. The metal purge valve of claim 3, wherein: the air permeability of the PTFE porous waterproof breathable film layer is 1000-2000 ml/cm2/min @70mbar, and the protection grade is IP67.

5. The metal purge valve of claim 3, wherein: the supporting material layer is one of polyester non-woven fabrics, polypropylene square grid fabrics, nylon substances, polyester taffeta fabrics and taffeta fabric.

6. The metal purge valve of claim 1, wherein: and a sealing gasket is arranged at the joint of the sealing plug and the mounting seat.

7. The metal purge valve of claim 1, wherein: the lower end edge of the ventilation cover is provided with a mounting groove matched with the upper edge of the mounting seat.

8. The metal purge valve of claim 1, wherein: the lower end of the mounting seat is provided with a mounting part for fixing on the electronic equipment; the installation part is provided with threads or a buckle.

9. The metal purge valve of claim 8, wherein: the installation part is sleeved with an O-shaped ring.

10. The metal purge valve of claim 1, wherein: the bottom of the cavity is provided with a coarse filter screen, and the coarse filter screen is arranged below the second air holes.