Closed air balance humidity control valve

Abstract

The utility model relates to a closed air balance humidity control valve which is characterized in that an air inlet and outlet public channel or an air inlet channel and an air outlet channel are arranged in a filling cavity on the back face of a valve body, and a water absorption filter element is inserted in the air inlet and outlet public channel or the air inlet channel; the filling cavity is filled with a drying agent and is sealed by an inner barrier film; the valve plate and the valve plate protecting cover are internally and externally mounted in a mounting groove in the front surface of the valve body; a vent hole in the valve plate is communicated with the air inlet and outlet public channel or the air inlet channel; a transverse dividing rib on the valve plate protecting cover is aligned with the air inlet and outlet public channel or the position between the air inlet channel and the exhaust channel is aligned; air inlet open grooves are formed in the side part and the bottom of one side, corresponding to the air inlet groove of the valve plate protection plate cover, of the mounting groove, and the air inlet open grooves extend to be close to air inlet open seams in the valve plate; an exhaust open groove is formed in the open end, corresponding to the exhaust groove of the valve plate protecting cover, of the mounting groove; and the outer barrier film is embedded and fixed in the protective rib on the periphery of the mounting groove. When the valve is applied to a sealing body, the dryness of inlet air can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic valve technology, specifically to a sealed gas balance humidity control valve. Background Technology

[0002] Sealed air-balanced humidity control valves are mainly used in automotive lights, power banks, and new energy batteries to prevent excessive internal humidity, which can lead to fogging, short circuits, or other malfunctions within the sealed body. They provide waterproofing, ventilation, drying, and moisture absorption. When the temperature of the sealed body changes, water vapor will condense in areas with lower temperatures, resulting in condensation. Normally, drying methods, such as adding desiccants or pre-sealing baking, are used to reduce the internal moisture content and relative humidity. When the temperature changes, the low relative humidity prevents condensation. However, when the internal temperature of the sealed body rises, the air pressure increases, causing volume expansion. To maintain pressure balance, internal gas flows out of the sealed body. Conversely, when the temperature drops, the air pressure decreases, causing volume contraction. To achieve pressure balance, external gas flows into the sealed body. Due to the low internal humidity and high external humidity, the air entering the sealed body carries more water molecules, raising the internal relative humidity again. After multiple temperature changes, the number of water molecules inside the sealed body increases, leading to condensation. Condensation often causes malfunctions in internal components. Currently, existing closed-loop air-balanced humidity control valves use the same exhaust and intake passages. When the temperature rises, the air expands, the valve opens, and dry air is expelled from the sealed body. When the temperature drops, the air contracts, the valve opens, and air enters through the same passage. A single air passage cannot prevent high-humidity air from entering the sealed body. These valves use rubber discs as valve plates. High-pressure airflow opens the valve plate during exhaust, but it cannot open inwards during intake. Therefore, most valve plates are designed with gaps, not a completely sealed enclosure, allowing airflow to slowly enter and exit. When the internal and external air pressures are balanced, high-humidity air can still enter the enclosure through these gaps. Therefore, existing valves cannot prevent high-humidity air from entering the sealed enclosure when the internal and external air pressures are different; even when the internal and external air pressures are equal, high-humidity air can still diffuse into the enclosure through the gaps. Utility Model Content

[0003] This utility model addresses the aforementioned technical problems by proposing a sealed air balance humidity control valve.

[0004] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0005] A sealed air balance humidity control valve includes a valve body, a valve plate, a valve plate cover, a water absorption filter element, an inner barrier membrane, and an outer barrier membrane; both the inner barrier membrane and the outer barrier membrane are made of waterproof and breathable membranes.

[0006] The valve body has a filling cavity on its back. Within the filling cavity, there is a vertically extending inward columnar inlet / outlet common channel or two columnar air channels (left and right). One columnar air channel is the inlet channel, and the other is the outlet channel. A water-absorbing filter element is inserted into the columnar inlet / outlet common channel or the inlet channel. The filling cavity is filled with a desiccant and sealed by an inner barrier membrane fixed to the back of the valve body. A through-hole is provided at the inner end of the inner barrier membrane corresponding to the columnar inlet / outlet common channel or the two columnar air channels (left and right).

[0007] The front of the valve body is provided with a mounting groove, which is connected to the columnar inlet and outlet common channel or the left and right columnar air channels on the back of the valve body.

[0008] The valve plate is made of an elastic thin sheet, and has vent holes and an air inlet slit. The back of the valve plate cover has an air inlet groove and an exhaust groove, with a transverse dividing rib between them. The air inlet groove is a closed groove, and the exhaust groove is an open groove with an open end. The valve plate and valve plate cover are embedded in the mounting groove on the front of the valve body, so that the valve plate is attached to the bottom of the mounting groove. The vent holes on the valve plate are aligned and connected to the columnar common air inlet / outlet channel or the air inlet channel. The transverse dividing rib on the valve plate cover is aligned with the common air inlet / outlet channel or with the position between the air inlet channel and the exhaust channel. A communicating air inlet slit is provided on one side and bottom of the mounting groove of the valve body corresponding to the air inlet groove of the valve plate cover, extending to a position close to the air inlet slit on the valve plate. An exhaust slit is provided on at least one side of the open end of the mounting groove of the valve body corresponding to the exhaust groove of the valve plate cover.

[0009] A closed protective rib is provided on the front of the valve seat around the mounting groove, and the outer barrier membrane is embedded in the area enclosed by the protective rib.

[0010] Furthermore, a valve cover is fixedly installed on the back of the valve body outside the inner barrier membrane. The valve cover is provided with an inlet / outlet through hole that is aligned with and connected to the columnar inlet / outlet common channel, or an inlet through hole that is aligned with and connected to the inlet channel and an exhaust through hole that is aligned with and connected to the exhaust channel. The valve cover is also provided with a long venting slit or venting hole.

[0011] Furthermore, a filter element baffle is installed in the air inlet / outlet or the air inlet on the valve cover.

[0012] Furthermore, at least one positioning pin is provided in the mounting groove on the front of the valve body near the edge of the groove; a positioning insertion hole is provided on the corresponding side of the valve plate, and the positioning insertion hole is fitted with the positioning pin; and a positioning hole is provided on the corresponding side of the valve plate cover, and the positioning hole is fitted with the positioning pin.

[0013] Furthermore, a flange is provided in the middle of the outer ring of the valve body. The part of the valve body located on the back side of the flange is the valve body installation insertion part; the part of the valve body located on the front side of the flange is the valve body installation exposed part.

[0014] The advantages and positive effects of this utility model are as follows:

[0015] 1. When this airtight air balance humidity control valve is applied to a sealing body, when the internal and external air pressures of the sealing body are balanced, the flow of internal and external gases is blocked by the valve plate, and the dryness of the sealing body cavity is ensured by the desiccant in the filling cavity of the valve body.

[0016] 2. This utility model forms independent air intake and exhaust passages through the assembly and cooperation of valve body, valve plate, valve plate cover, water-absorbing filter element, inner barrier membrane and outer barrier membrane. The water-absorbing filter element is installed in the structural component at the end of the air intake passage to ensure the dryness of the intake air. This avoids condensation caused by multiple temperature changes inside and outside the sealing body. Thus, while ensuring that the sealing body achieves internal and external air pressure balance, it better maintains the dryness of the cavity of the sealing body. Attached Figure Description

[0017] Figure 1 This is an external view of Embodiment 1 of the present invention;

[0018] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention;

[0019] Figure 3 This is a three-dimensional breakdown of Embodiment 1 of the present invention. Figure 1 ;

[0020] Figure 4 This is a three-dimensional breakdown of Embodiment 1 of the present invention. Figure 2 ;

[0021] Figure 5 This is an external view of Embodiment 2 of the present invention;

[0022] Figure 6 This is a cross-sectional view of Embodiment 2 of the present invention;

[0023] Figure 7 This is a three-dimensional breakdown of Embodiment 2 of the present invention. Figure 1 ;

[0024] Figure 8 This is a three-dimensional breakdown of Embodiment 2 of the present invention. Figure 2 . Detailed Implementation

[0025] The structure of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0026] Please refer to a closed-loop air balance humidity control valve. Figures 1-8 The invention features a valve body 1, a valve plate 5, a valve plate cover 6, a water-absorbing filter element 4, an inner barrier membrane 3, and an outer barrier membrane 7; both the inner and outer barrier membranes are waterproof and breathable membranes.

[0027] The valve body has a filling cavity 1.7 on its back side, and a cylindrical inlet / outlet common channel 1.8 extending vertically inward is provided within the filling cavity (see...). Figures 5-8 ) or two columnar air channels, left and right (see Figures 1-4 The valve body has two cylindrical air channels, one for intake (1.4) and the other for exhaust (1.6). Preferably, the cross-sectional area of ​​the intake channel is larger than that of the exhaust channel. When using a single cylindrical intake / exhaust channel, a water-absorbing filter element is inserted within it. When the intake and exhaust channels are designed separately, a water-absorbing filter element is inserted into the inner hole of the intake channel. This water-absorbing filter element is a cylindrical filter element made of porous material. Due to its large surface area, water molecules are adsorbed onto the inner wall of the porous material after external air enters the channel, thus drying the intake air. Furthermore, reinforcing ribs are provided between the cylindrical intake / exhaust channel or the two cylindrical air channels (left and right) and the inner wall of the filling cavity to ensure the structural strength of the valve body. The filling cavity is filled with a desiccant and sealed by an inner barrier membrane fixed to the back of the valve body. The inner barrier membrane has through holes at the inner end corresponding to the columnar inlet and outlet common channel or the left and right two columnar air channels.

[0028] To reduce the contact area between the desiccant and the air inside the sealed body, and to protect the desiccant and the inner barrier membrane, a valve cover 2 is fixedly installed on the back of the valve body, outside the inner barrier membrane. The valve cover has inlet / outlet holes that align with the columnar inlet / outlet common channel, or an inlet hole aligned with the inlet channel, and an exhaust hole aligned with the exhaust channel. Furthermore, a filter element baffle 2.2 is installed within the inlet / outlet holes or the inlet hole to prevent the water-absorbing filter element from falling off. The valve cover also has venting slits 2.1 or vent holes, such as the radially arranged venting slits shown in the attached diagram, to allow air communication between the filling cavity on the valve body and the inner cavity of the sealed body.

[0029] The front of the valve body is provided with a mounting groove 1.1 for embedding the valve plate and valve plate cover. The shape of the valve plate mounting groove is not limited, such as a rectangular groove, a circular groove, or other shapes. In this utility model, the valve plate mounting groove is preferably a rectangular groove, and the valve plate mounting groove is connected to the columnar inlet and outlet common channel or the left and right columnar air channels on the back of the valve body.

[0030] The valve plate is made of an elastic thin sheet, such as a rubber diaphragm or a silicone diaphragm. A vent hole 5.3 and an air inlet slit 5.1 are provided on the valve plate. The air inlet slit can be arc-shaped, trapezoidal, triangular, etc. The back of the valve plate cover is provided with an air inlet groove 6.2 and an exhaust groove 6.4. A transverse dividing rib 6.3 is provided between the air inlet groove and the exhaust groove. The air inlet groove is a closed groove, such as a square closed groove (as shown in the attached drawing) or a circular closed groove. The exhaust groove is an open groove with an open end, such as a square open groove (as shown in the attached drawing) or a circular open groove. The valve plate and valve plate cover are embedded in the mounting groove on the front of the valve body, so that the valve plate is attached to the bottom of the mounting groove. The vent hole on the valve plate is aligned and connected to the columnar common air inlet and outlet channel or is connected to the air inlet channel. The transverse dividing rib on the valve plate cover is aligned with the common air inlet and outlet channel (it can be in the center or off-center) or aligned with the position between the air inlet channel and the exhaust channel. An air intake slot 1.3 is provided on one side and bottom of the valve body mounting groove corresponding to the air intake slot of the valve plate cover. The air intake slot extends to a position close to the air intake slit on the valve plate, allowing external gas to be input when the air intake slit is opened. An exhaust slot 1.5 is provided on at least one side of the open end of the valve body mounting groove corresponding to the exhaust slot of the valve plate cover, allowing internal gas to be discharged. In this utility model, it is preferable to provide one exhaust slot on each side of the open end of the valve body mounting groove corresponding to the exhaust slot of the valve plate cover, which can achieve better exhaust effect.

[0031] A closed protective rib is provided on the front of the valve seat around the mounting groove. The protective rib is not limited to the square closed protective rib shown in the attached figure, but can also be a circular closed protective rib, etc. The outer barrier membrane is embedded in the area enclosed by the protective rib, and the protective rib protects the valve plate, valve plate cover and outer barrier membrane.

[0032] In the above structure, to facilitate quick and accurate alignment and installation of the valve plate and valve plate cover, at least one positioning post 1.2 is provided near the edge of the mounting groove on the front of the valve body. In this invention, two positioning posts are preferably arranged symmetrically. A positioning insertion hole 5.2 is provided on the corresponding side of the valve plate, and the positioning insertion hole is fitted with the positioning post. A positioning hole 6.1 is provided on the corresponding side of the valve plate cover, and the positioning hole is fitted with the positioning post.

[0033] To facilitate the installation of the airtight air-balanced humidity control valve on the sealing body, the valve body in this invention can be disc-shaped, or it can be hexagonal on the front and cylindrical on the back. In this invention, the valve body is preferably disc-shaped. A flange is provided in the middle of the outer ring of the valve body. The portion of the valve body located on the back side of the flange is the valve body installation insertion part 1.9, used to connect with the reserved opening on the sealing body. One possible connection method is to provide a retaining protrusion along the circumferential direction on the back side of the valve body located on the flange, which engages with a groove on the sealing body. A sealing ring 8 is installed on the outer side of the connection point, pressing the sealing ring against the back of the flange. Alternatively, an external thread can be provided on the front side of the valve body located on the flange, and a threaded hole can be provided at the reserved opening position on the sealing body. A threaded connection is achieved by tightening the sealing ring. The portion of the valve body located on the front side of the flange is the exposed valve body installation part 1.10, used for handheld installation of the airtight air-balanced humidity control valve on the sealing body.

[0034] The working principle of this utility model:

[0035] The back portion of the valve body extends into the cavity of the sealing body. The desiccant within the valve body's filling cavity absorbs water molecules from inside the sealing body cavity, maintaining dryness inside the cavity under balanced internal and external air pressure. When the internal temperature of the sealing body cavity increases, leading to increased internal air pressure, the gas first passes through the columnar inlet / outlet common channel or exhaust channel on the valve body. Then, the valve disc bulges in the center of the exhaust groove on the valve disc cover, allowing exhaust gas to pass through the gap between the valve disc and the bottom surface of the valve body mounting groove into the exhaust slots on both sides, and finally exit through these slots. When the internal temperature of the sealed body decreases, resulting in a decrease in internal air pressure, the cavity formed by the air inlet groove of the valve plate cover and the bottom surface of the mounting groove on the front of the valve body is in a negative pressure state. Outside air is delivered to the inner side of the corresponding end of the valve plate through the air inlet slot on the mounting groove of the valve body, causing the air inlet slit on the valve plate to open. Gas enters the cavity of the sealed body through the air inlet slit, the air inlet groove of the valve plate cover, the common air inlet and outlet channel or the air inlet channel, thereby achieving pressure compensation. When passing through the common air inlet and outlet channel or the air inlet channel, moisture is absorbed by the water absorption filter element, thereby drying the incoming air.

[0036] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A closed gas balance humidity control valve, characterized by: It includes a valve body, a valve plate, a valve plate cover, a water-absorbing filter element, an inner barrier membrane, and an outer barrier membrane; both the inner and outer barrier membranes are made of waterproof and breathable membranes. The valve body has a filling cavity on its back. Within the filling cavity, there is a vertically extending inward columnar inlet / outlet common channel or two columnar air channels (left and right). One columnar air channel is the inlet channel, and the other is the outlet channel. A water-absorbing filter element is inserted into the columnar inlet / outlet common channel or the inlet channel. The filling cavity is filled with a desiccant and sealed by an inner barrier membrane fixed to the back of the valve body. A through-hole is provided at the inner end of the inner barrier membrane corresponding to the columnar inlet / outlet common channel or the two columnar air channels (left and right). The front of the valve body is provided with a mounting groove, which is connected to the columnar inlet and outlet common channel or the left and right columnar air channels on the back of the valve body. The valve plate is made of an elastic thin sheet, and has vent holes and an air inlet slit. The back of the valve plate cover has an air inlet groove and an exhaust groove, with a transverse dividing rib between them. The air inlet groove is a closed groove, and the exhaust groove is an open groove with an open end. The valve plate and valve plate cover are embedded in the mounting groove on the front of the valve body, so that the valve plate is attached to the bottom of the mounting groove. The vent holes on the valve plate are aligned and connected to the columnar common air inlet / outlet channel or the air inlet channel. The transverse dividing rib on the valve plate cover is aligned with the common air inlet / outlet channel or with the position between the air inlet channel and the exhaust channel. A communicating air inlet slit is provided on one side and bottom of the mounting groove of the valve body corresponding to the air inlet groove of the valve plate cover, extending to a position close to the air inlet slit on the valve plate. An exhaust slit is provided on at least one side of the open end of the mounting groove of the valve body corresponding to the exhaust groove of the valve plate cover. A closed protective rib is provided on the front of the valve seat around the mounting groove, and the outer barrier membrane is embedded in the area enclosed by the protective rib.

2. The closed gas balance humidity control valve according to claim 1, characterized in that: A valve cover is fixedly installed on the back of the valve body, outside the inner barrier membrane. The valve cover is provided with an inlet / outlet through hole that is aligned with and connected to the columnar inlet / outlet common channel, or an inlet through hole aligned with and connected to the inlet channel, and an exhaust through hole aligned with and connected to the exhaust channel. The valve cover is also provided with a long venting slit or venting hole.

3. The closed gas balance humidity control valve of claim 1, wherein: A filter element baffle is installed in the air inlet / outlet or the air inlet on the valve cover.

4. The closed gas balance humidity control valve of claim 1, wherein: At least one positioning pin is provided in the mounting groove on the front of the valve body near the edge of the groove; a positioning hole is provided on the corresponding side of the valve plate, and the positioning hole is fitted with the positioning pin; and a positioning hole is provided on the corresponding side of the valve plate cover, and the positioning hole is fitted with the positioning pin.

5. The closed gas balance humidity control valve of claim 1, wherein: A flange is provided in the middle of the outer ring of the valve body. The part of the valve body located on the back side of the flange is the valve body installation insertion part; the part of the valve body located on the front side of the flange is the valve body installation exposed part.

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