CN107061816B - Balanced ventilation valve - Google Patents
Balanced ventilation valve Download PDFInfo
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- CN107061816B CN107061816B CN201611208299.5A CN201611208299A CN107061816B CN 107061816 B CN107061816 B CN 107061816B CN 201611208299 A CN201611208299 A CN 201611208299A CN 107061816 B CN107061816 B CN 107061816B
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- sealing body
- sealing
- waterproof
- elastic
- breathable film
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
- F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The invention discloses a balanced ventilation valve which comprises a shell, a first waterproof ventilation membrane and a dynamic sealing structure. The top surface of the shell is provided with a protruding part; the first waterproof and breathable film is fixed on the bottom of the protruding part, and the dynamic sealing structure is used for sealing and isolating or communicating the first waterproof and breathable film with the inner cavity of the shell; the waterproof and breathable film comprises a driving mechanism, a first sealing body, a second sealing body and a sealing cover, wherein the first sealing body is arranged on the shell in a sealing way and surrounds the side wall of the first waterproof and breathable film; the first waterproof and breathable film is positioned in a cavity surrounded by the first sealing body and the second sealing body, and the driving mechanism drives the second sealing body to move towards or away from the first sealing body, so that the second sealing body is in sealing fit with or separated from the first sealing body. When abnormal working conditions occur, the first sealing body is sealed with the second sealing body, external steam is prevented from entering the box body, parts in the box body can run under constant humidity, and the sealing performance of the balance ventilation valve is improved.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a balance ventilation valve.
Background
The balance ventilation valve can be applied to a pack box body of an electric automobile battery, or a high-voltage control box body, or a sealing box body with high requirements on air pressure or humidity. In particular to a pack battery pack of a new energy automobile part, a balance ventilation valve is arranged on a mounting surface of a battery pack product, and the ventilation valve can balance internal and external air pressure when the internal pressure of a mounting box body changes and can release the internal pressure when the internal air pressure rises sharply; meanwhile, the ventilation valve has the function of sealing and isolating the inside of the installation box body from the outside.
The structure of the existing balance ventilation valve is mostly as disclosed in chinese patent document CN106090365a, and mainly comprises a housing, wherein the top surface of the housing is raised, a ventilation film is arranged on the bottom of the housing, a vent hole is arranged on the main body, a convex column is formed on the bottom of the main body, and the puncture end of the convex column faces the ventilation film. The balanced breather valve of this structure is installed on the opening of battery box, and under the normal operating mode, the ventilated membrane is sealed with the inside of main part and box and is kept apart, when being in unusual operating mode in the box, can produce huge pressure and order about ventilated membrane to crooked towards main part bottom direction, and the projection is puncture the ventilated membrane this moment, and the high pressure in the box releases to the external world through the passageway after the puncture to prevent to take place explosion phenomenon in the box, play explosion-proof effect.
However, when the balance ventilation valve with the structure is used, the mounting hole is formed in the mounting surface of the box body, the bulge of the ventilation valve penetrates through the mounting hole to the outside, the shell is positioned in the box body, the inside of the box body is isolated from the outside through the waterproof ventilation membrane, after the balance ventilation valve can be used for a period of time, the sealing performance of the waterproof ventilation membrane is likely to be reduced, the waterproof ventilation membrane can not completely isolate outside water vapor, the humidity in the box body can not be kept in a constant state, and especially when the outside humidity is higher than the humidity in the box body, the outside water vapor can penetrate through a gap at the edge of the waterproof ventilation membrane to enter the box body, so that the humidity in the box body is changed, and the normal working state of elements in the box body is affected. For example, the battery system in the battery case cannot be operated normally.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems that the sealing performance of the balance ventilation valve in the prior art is poor, the humidity in the box body cannot be ensured to be in a constant state, and the elements in the box body cannot normally operate.
To this end, the invention provides a balanced ventilation valve comprising
A housing having an interior cavity and a bottom opening with a protrusion on a top surface thereof; the protruding part is provided with at least one first channel which extends vertically to communicate the outside with the inner cavity;
A first waterproof and breathable film fixed on the bottom surface of the protruding part, wherein the bottom of the protruding part is provided with a first puncture part capable of puncturing the first waterproof and breathable film;
the dynamic sealing structure is arranged on the shell and positioned in the inner cavity and is used for sealing and isolating or communicating the first waterproof breathable film with the inner cavity of the shell;
the dynamic sealing structure comprises a driving mechanism, a first sealing body and a second sealing body, wherein the driving mechanism is arranged on the shell and seals the side walls around the first waterproof and breathable film, and the second sealing body is arranged vertically opposite to the first sealing body; the first waterproof breathable film is positioned in a first cavity surrounded by the first sealing body and the second sealing body, and the driving mechanism drives the second sealing body to move towards or away from the first sealing body, so that the second sealing body is in sealing fit with the first sealing body or is separated from the first sealing body.
Preferably, in the balanced ventilation valve, the driving mechanism is fixed on the housing in a sealing manner, and the first sealing body is fixed on the housing through the driving mechanism;
the dynamic sealing structure further comprises a movable part arranged in the shell and positioned below the driving mechanism, and the second sealing body is fixed on the top surface of the movable part; the driving mechanism drives the movable part to drive the second sealing body to move;
The driving mechanism, the first sealing body, the second sealing body and the movable part enclose the first cavity.
Further preferably, the above balanced ventilation valve, the movable component is made of magnetic material;
the driving mechanism comprises a supporting body which is fixed on the inner surface of the shell in a sealing way and is wound around the first waterproof and breathable film, and a coil which is wound on the outer wall surface of the supporting body, and after the coil is electrified, electromagnetic force for driving the movable part to move vertically is generated;
the first waterproof breathable film stretches into the supporting body, and the first sealing body is fixed on the bottom of the supporting body.
More preferably, in the balanced ventilation valve, a recess portion suitable for embedding the first waterproof ventilation film is formed at the top of the support body, and a second channel for communicating the first waterproof ventilation film with the first cavity is formed on the recess portion;
the first sealing body is disposed on a bottom surface of the recess.
Further preferably, the bottom surface of the concave portion is provided with a first outer edge extending horizontally outwards, and the first sealing body is fixed on the bottom of the first outer edge;
The bottom of the concave part is provided with a first opening which is used as the second channel; the coil is sleeved on the outer wall surface of the concave part and is lapped on the first outer edge.
Preferably, in the balanced ventilation valve, the first sealing body is a first groove formed on the bottom surface of the concave part, and the second sealing body is a first elastic sealing body which is formed on the movable part in a protruding manner and can be clamped in the first groove in a sealing manner; or alternatively
The first sealing body is a second elastic sealing body which is formed on the bottom surface of the concave part in a protruding mode, and the second sealing body is a second groove which is formed on the movable part and can be tightly clamped in by the second elastic sealing body.
Preferably, the balanced ventilation valve further comprises at least one fixing piece fixed on the bottom of the shell and located below the movable part, and an elastic part arranged between the fixing piece and the movable part; the elastic member is capable of applying a pulling force to the movable member in a direction away from the first sealing body.
Further preferably, the above-mentioned balance ventilation valve, wherein the edge of the movable member has at least three extending portions extending horizontally toward the inner wall surface of the housing;
The inner wall surface of the shell is provided with guide grooves which are in one-to-one correspondence with the extension parts;
the extension part stretches into the guide groove, the fixing parts are fixed on the bottom of the guide groove in a one-to-one correspondence manner, and the elastic part is positioned in the guide groove.
Preferably, in the balanced ventilation valve, a first through hole is formed in a position of the movable part, which is located in the second sealing body, and a second waterproof ventilation film for sealing the first through hole is fixed on a surface of the first through hole, which is located on the same side as the second sealing body;
the bottom of the driving mechanism is provided with a second puncture part, and the spike end of the second puncture part is opposite to the second waterproof breathable film and forms a reserved gap with the second waterproof breathable film.
Preferably, in the balance ventilation valve, an inward concave mounting groove is formed on the top surface of the housing and avoids the periphery of the protruding part; and also comprises
The elastic sealing piece is arranged in the mounting groove, and deformation gaps are reserved between the periphery of the elastic sealing piece and the mounting groove; in a free state, the thickness of the elastic sealing element is higher than the height of the mounting groove;
a securing assembly for securing the housing top to a mounting surface of a housing, the resilient seal being located between the housing top surface and the mounting surface;
Under the fastening action of the fixing component, the mounting surface is forced to apply a compression force towards one side of the top surface to the elastic sealing element, so that the elastic sealing element is integrally and tightly pressed into the mounting groove, and the top surface of the elastic sealing element is flush with the top surface of the mounting groove.
Further preferably, the above-mentioned balance ventilation valve, the top surface of the elastic sealing member has a frame-shaped protrusion protruding upward thereon, the frame-shaped protrusion dividing the top surface of the elastic sealing member into a first region located inside the frame-shaped protrusion, and a second region located outside the frame-shaped protrusion;
the securing assembly secures the housing to the mounting surface through the first region.
Preferably, the above-mentioned balance ventilation valve further comprises a first humidity detector provided in the protruding portion and communicating with the outside, and a second humidity detector provided on the bottom of the movable member;
a controller for controlling the opening or closing of the driving mechanism according to the detection data of the first humidity detector and the second humidity detector; and/or
The device further comprises a protective cover arranged on the top of the protruding part, and the protective cover is provided with at least one third channel.
Further preferably, in the balanced ventilation valve, the first groove and/or the second groove is an annular groove, and the first elastic sealing body and/or the second elastic sealing body is an elastic sealing ring; and/or
The top surface of the concave part is provided with a second outer edge which extends horizontally outwards, the second outer edge is fixed on the shell in a sealing way, and the bottom of the protruding part and the first waterproof breathable film extend into the concave part; and/or
The movable part is a plate.
The technical scheme of the invention has the following advantages:
1. the invention provides a balance ventilation valve which comprises a shell, a first waterproof ventilation film and a dynamic sealing structure. Wherein the housing has an interior cavity and a bottom opening with a protrusion on a top surface thereof; the protruding part is provided with at least one first channel which extends vertically to communicate the outside with the inner cavity; a first waterproof and breathable film is fixed on the bottom surface of the protruding part; the dynamic sealing structure is arranged on the shell and positioned in the inner cavity and is used for sealing and isolating or communicating the first waterproof breathable film with the inner cavity of the shell; the dynamic sealing structure comprises a driving mechanism, a first sealing body and a second sealing body, wherein the first sealing body is arranged on the shell in a sealing way and surrounds the periphery of the first waterproof and breathable film, and the second sealing body is arranged vertically opposite to the first sealing body; the first waterproof breathable film is positioned in a first cavity surrounded by the first sealing body and the second sealing body, and the driving mechanism drives the second sealing body to move towards or away from the first sealing body, so that the second sealing body is in sealing fit with the first sealing body or is separated from the first sealing body.
The balance ventilation valve with the structure is characterized in that a first sealing body is arranged on the periphery of a first waterproof ventilation film, and a first cavity formed by the first sealing body and a second sealing body surrounds the first waterproof ventilation film. Under normal working conditions, the outside humidity is equal to the humidity of the inner cavity of the shell, at the moment, the second sealing body is separated from the first sealing body, and the first waterproof breathable film is communicated with the inner cavity of the shell; when abnormal working conditions occur, when the humidity of the outside air is greater than or less than the humidity of the inner cavity of the shell (namely, the humidity of the gas in the box body), the driving mechanism is started, so that the second sealing body moves towards the first sealing body and is in sealing fit with the first sealing body, the first waterproof breathable film is sealed in the first cavity, so that the first waterproof breathable film is isolated from the inner cavity of the shell (namely, the inner cavity of the box body), water vapor with high humidity outside can not enter the box body, or the gas in the inner cavity of the shell can not be discharged to the outside, the humidity in the box body is changed, and parts in the box body can operate under the condition of constant humidity, so that the sealing performance of the balanced breathable valve is improved; when the abnormal working condition is eliminated, the driving mechanism drives the second sealing body to move towards the direction away from the first sealing body, so that the second sealing body is separated from the first sealing body and is reset to the initial state.
2. The balance ventilation valve provided by the invention has the advantages that the movable part is made of magnetic materials; the driving mechanism comprises a supporting body which is fixed on the inner surface of the shell in a sealing way and is wound around the first waterproof and breathable film, and a coil which is wound on the outer wall surface of the supporting body, and after the coil is electrified, electromagnetic force for driving the movable part to move vertically is generated; the first waterproof breathable film stretches into the supporting body, and the first sealing body is fixed on the bottom of the supporting body. The balance ventilation valve adopts the power-on coil to generate a magnetic field to provide electromagnetic force for the movable part to drive the movable part to move, so as to control the opening or closing of the driving mechanism.
3. The first sealing body is a first groove formed on the bottom surface of the concave part, and the second sealing body is a first elastic sealing body which is formed on the movable part in a protruding mode and can be clamped into the first groove in a sealing mode; or the first sealing body is a second elastic sealing body which is formed on the bottom surface of the concave part in a protruding mode, and the second sealing body is a second groove which is formed on the movable part and can be tightly clamped by the second elastic sealing body. When the first waterproof and breathable film is required to be isolated from the inner cavity of the shell, the first elastic sealing body is driven to move and be clamped into the first groove, or the second groove is driven to move and be clamped into the second groove, so that the whole structure is simple and compact, and the operation is convenient.
4. The invention provides a balance ventilation valve, which also comprises at least one fixed piece fixed on the bottom of a shell and positioned below a movable part, and an elastic part arranged between the fixed piece and the movable part; the elastic member is capable of applying a pulling force to the movable member in a direction away from the first sealing body. When the first waterproof and breathable film is not required to be isolated from the inner cavity of the shell, reverse electricity is conducted to the coil and/or under the action of the elastic component, the driving mechanism and/or the elastic component apply acting force to the second sealing body towards the direction away from the first sealing body, so that the second sealing body is further promoted to be reset to an initial state.
5. According to the balance ventilation valve provided by the invention, the periphery of the top surface of the shell, which is avoided from the protruding part, is provided with the inwards concave mounting groove; the elastic sealing piece is arranged in the mounting groove, and a deformation gap is reserved between the periphery of the elastic sealing piece and the mounting groove; in a free state, the thickness of the elastic sealing element is higher than the height of the mounting groove; a securing assembly for securing the housing top to a mounting surface of the housing, the resilient seal being located between the housing top surface and the mounting surface; under the fastening action of the fixing component, the mounting surface is forced to apply a compression force towards one side of the top surface to the elastic sealing element, so that the elastic sealing element is integrally and tightly pressed into the mounting groove, and the top surface of the elastic sealing element is flush with the top surface of the mounting groove.
The balance ventilation valve with the structure is characterized in that an elastic sealing element is changed from an original free state into a compressed state, and the elastic sealing gasket transversely extends while being deformed and contracted vertically, so that the through hole of the elastic sealing gasket and the outer wall surface of the mounting table, the peripheral side wall of the elastic sealing gasket and the inner wall surface of the mounting groove can be in a tight sealing state, and the transverse deformation of the elastic sealing element is limited by the transverse deformation clearance; meanwhile, when the elastic sealing element is deformed vertically, the elastic sealing element is pressed into the mounting groove integrally and tightly, the top surface of the elastic sealing element is flush with the top surface of the mounting groove, and the state is kept, so that when the fastener applies acting force, the deformation of the elastic sealing element in the vertical direction can be well controlled (taking the top surface of the mounting groove as a reference), the transverse deformation and the longitudinal deformation of the elastic sealing element are controlled, the gap between the top wall surface of the shell and the mounting surface is tightly sealed, the sealing performance of the balanced ventilation valve is improved, and the protection grade of the box body is ensured to reach the required requirement after the balanced ventilation valve is mounted on the box body.
6. The invention provides a balance ventilation valve, wherein the top surface of an elastic sealing element is provided with a frame-shaped bulge protruding upwards, and the frame-shaped bulge divides the top surface of the elastic sealing element into a first area positioned in the frame-shaped bulge and a second area positioned outside the frame-shaped bulge; the securing assembly secures the housing to the mounting surface through the first region. After the fixing component is fastened, the frame-shaped bulge and the mounting surface are tightly pressed, even if the mounting surface is not a horizontal surface, a part of the bulge or the recess is arranged, and the flatness of the mounting surface is compensated by the different degrees of compression of the frame-shaped bulge, so that the mounting surface and the elastic sealing element are always in a sealing state, and the sealing performance of the balanced ventilation valve mounted on the mounting surface is further ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a balanced ventilation valve according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of the balanced breather valve provided in embodiment 1 of the present invention with the protective cover removed;
FIG. 3 is a schematic perspective view of a housing in a balanced breather valve according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of the elastic sealing member of the balanced breather valve according to embodiment 1 of the present invention;
FIG. 5 is a schematic longitudinal cross-sectional view of a balanced breather valve provided in example 1 of the present invention;
FIG. 6 is a schematic view of the structure of the housing of the balanced breather valve according to embodiment 1 of the present invention (bottom view);
fig. 7 is a schematic structural view (in top view) of a support body in a balanced ventilation valve according to embodiment 1 of the present invention;
FIG. 8 is a schematic diagram illustrating the cooperation of the driving mechanism with the movable member, the first sealing body and the second sealing body in the balanced ventilation valve according to the embodiment 1 of the present invention;
FIG. 9 is a schematic diagram showing the cooperation of the movable member, the fixed member and the elastic member in the balanced ventilation valve provided in embodiment 1 of the present invention (including a second waterproof ventilation film in a top view);
FIG. 10 is a schematic diagram showing the cooperation of the movable member, the fixed member and the elastic member in the balanced ventilation valve provided in embodiment 1 of the present invention (the second waterproof ventilation film is removed in the top view);
FIG. 11 is a schematic view of the structure of the support body in the balance ventilation valve provided in embodiment 1 of the present invention (bottom view);
reference numerals illustrate: 1-a housing; 11-a protrusion; 12-a guide groove; 13-mounting slots; 14-an elastic seal; 141-a frame-shaped protrusion; 142-annular protrusion; 15-a mounting table; 2-a first waterproof breathable film; 3-a driving mechanism; 31-a support; 311-a depression; 312-a first outer edge; 313-a second outer edge; a 32-coil; 33-a scaffold; 4-a first sealing body; 5-a second seal; 6-a movable part; 61-extension; 62-a first through hole; 63-a second waterproof breathable film; 64-a second piercing member; 7-a first cavity; 8-fixing pieces; 9-an elastic member; 101-a first humidity detector; 102-a second humidity detector; 16-protective cover.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "vertical or vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The present embodiment provides a balanced ventilation valve, as shown in fig. 1-9, including a housing 1, a first waterproof ventilation membrane 2, a dynamic sealing structure, a second waterproof ventilation membrane 63, a first puncture member, a second puncture member 64, a first humidity detector 101, a second humidity detector 102, a controller, a protection cover 16, and a fixing assembly.
The shell 1 comprises an inner cavity and a bottom opening, as shown in fig. 2, 3 and 5, a protruding part 11 is arranged on the top surface of the shell, and an inward concave mounting groove 13 is formed at the periphery of the protruding part 11; the protruding part 11 is provided with a plurality of first channels which vertically extend to communicate the outside with the inner cavity, the first waterproof and breathable film 2 is fixed on the bottom surface of the protruding part 11, and the protruding bottom is also provided with a first puncture part which is separated from the first waterproof and breathable film 2 by a preset gap, such as a bulge, and the bulge is positioned in the protruding part 11 and reserves a required gap with the first waterproof and breathable film 2.
As shown in fig. 2, an elastic sealing element 14, preferably an elastic sealing gasket, is arranged in the mounting groove 13, and a transverse deformation gap is reserved between the side wall around the elastic sealing gasket and the mounting groove 13; in the free state, the thickness of the elastic sealing member 14 is higher than the height of the mounting groove 13, for example, the thickness of the elastic sealing gasket is 1.2 times, 1.5 times, 1.8 times, etc. the height of the mounting groove 13, which is determined according to practical requirements. As shown in fig. 4, the sealing gasket has a frame-shaped protrusion 141 protruding upward on the top surface thereof, the frame-shaped protrusion 141 dividing the top surface of the sealing gasket into a first region located inside the frame-shaped protrusion 141 and a second region located outside the frame-shaped protrusion 141; the first region of the elastic sealing gasket is provided with a plurality of through holes, the plurality of through holes are preferably uniformly distributed on the sealing gasket, the first region of the elastic sealing gasket is also provided with an annular bulge 142 surrounding the periphery of the through holes, and the annular bulge 142 is positioned on one side of the frame-shaped bulge 141 and has an overlapping region with the annular bulge 142.
The fixing assembly comprises four mounting tables 15 formed on the top surface and located in the mounting grooves 13, as shown in fig. 3, each mounting table 15 is provided with a blind hole, and fasteners, such as screws or bolts, fastened in the blind holes are sleeved on the periphery of the mounting table 15 in a one-to-one correspondence. The fasteners sequentially pass through the blind holes on the mounting surface and the mounting table 15 to fix the top of the shell 1 on the mounting surface, and the elastic sealing gasket is positioned between the top surface of the shell 1 and the mounting surface. Under the fastening action of the fixing assembly, the mounting surface is forced to apply a compressive force to the elastic sealing gasket which is contracted and deformed toward the top surface side, so that the elastic sealing gasket is pressed tightly into the mounting groove 13 as a whole and the top surface thereof is made flush with the top surface of the mounting groove 13.
As shown in fig. 1, the protecting cover 16 is buckled on the top of the protruding portion 11, and a plurality of third channels are formed on the protecting cover 16, so that the first channels in the protruding portion 11 are communicated with the outside, and the protecting cover 16 prevents hard objects or large objects from entering the protruding portion 11 to damage the first waterproof and breathable film 2.
The dynamic sealing structure is arranged on the shell 1 and positioned in the inner cavity and is used for sealing and isolating or communicating the first waterproof and breathable film 2 with the inner cavity of the shell 1. As shown in fig. 5 and 8, the dynamic seal structure includes a driving mechanism 3, a first seal body 4, a second seal body 5, and a movable member 6.
The driving mechanism 3 includes a supporting body 31 and a coil 32, the supporting body 31 is fixed on the inner surface of the casing 1 in a sealing manner and is wound around the first waterproof and breathable film 2, as shown in fig. 7 and 8, a concave portion 311 suitable for embedding the first waterproof and breathable film 2 is arranged at the top of the supporting body 31, a first opening is arranged at the bottom of the concave portion 311, a first outer edge 312 and a second outer edge 313 which extend outwards horizontally are respectively arranged on the bottom surface and the top surface of the concave portion 311, the second outer edge 313 is fixed on the inner surface of the top of the casing 1 in a sealing manner, and the first sealing body 4 is fixed on the bottom of the first outer edge 312; the coil 32 is sleeved on the outer wall surface of the concave part 311 and is positioned between the first outer edge 312 and the second outer edge 313, and the bottom part is lapped on the first outer edge 312.
The first sealing body 4 is a first groove, preferably an annular groove, open on the bottom of the first outer rim 312.
As shown in fig. 9, the movable part 6 is preferably a plate made of a magnetic material, such as magnetic steel or magnet, and the plate is provided in the housing 1 below the driving mechanism 3, and the second sealing body 5 is fixed on the top surface of the plate. As shown in fig. 5, 6 and 9, the plate is arranged in the shell 1 by the fixing member 8 and the elastic member 9, the edge of the plate is provided with four extending portions 61 extending horizontally towards the inner wall surface of the shell 1, preferably, the four extending portions 61 are uniformly distributed on the plate, correspondingly, the inner wall surface of the shell 1 is provided with guide grooves 12 which are in one-to-one correspondence with the extending portions 61 and extend vertically, the extending portions 61 respectively extend into one guide groove 12, the fixing member 8 is preferably a fixing plate, and the fixing plate is fixed on the bottom opening of the guide groove 12. The elastic component 9 is preferably a spring, the spring is arranged between the fixed plate and the plate, the spring can apply a pulling force to the movable component 6 in a direction away from the first sealing body 4, so that the second sealing body 5 is conveniently separated from the first sealing body 4, and the state is reset to an initial state; meanwhile, the guide groove 12 is used for guiding the plate to move along the vertical direction, so that the second sealing body 5 is convenient to be clamped into the first sealing body 4.
As shown in fig. 9, the second sealing body 5 is a first elastic sealing body, such as an elastic sealing ring, protruding from the top surface of the panel, capable of being sealed and snapped into the first groove. The support body 31, the first groove, the first elastic sealing body and the plate form a first cavity 7, and the first waterproof breathable film 2 is located in the first cavity 7.
In addition, as shown in fig. 9, 10 and 11, a first through hole 62 is formed in the movable member 6 at the position of the first cavity 7, and a second waterproof and breathable film 63 sealing the first through hole 62 is fixed to the surface of the first through hole 62 on the same side as the second sealing body 5; correspondingly, a bracket 33, for example, a cross bracket 33 is arranged on the bottom opening of the concave portion 311, the cross bracket 33 divides the bottom opening of the concave portion 311 into four second channels, a second puncture member 64, for example, a protrusion, is arranged at the bottom of the crossing position of the cross bracket 33, the tip end of the second puncture member 64 faces the second waterproof and breathable film 63, and a required gap is reserved between the second puncture member and the second waterproof and breathable film 63. In addition, a partition plate having a passage is formed on the bottom surface of the first through hole 62 to prevent the parts in the case from extending into the through hole and damaging the second waterproof and breathable film 63.
As shown in fig. 2 and 5, a first humidity detector 101 for detecting the humidity of the gas in the external environment is provided on the top surface of the first passage of the protruding portion 11; a second humidity detector 102 is provided on the bottom of the movable member 6, for example, by adhesive bonding, for detecting the humidity of the gas in the housing 1 (i.e., in the case); the controller controls the opening or closing of the driving mechanism 3 based on the detection data of the first humidity detector 101 and the second humidity detector 102. In addition, a wire leading hole through which the wire of the first humidity detector 101 passes is formed in the shell 1, and the wire passes through the wire leading hole and then enters the wire leading hole formed in the side wall of the inner cavity of the shell 1; meanwhile, the wires of the second humidity detector 102 are also threaded in the threading holes, and finally, the two wires are all installed inside the box body. The first humidity detector 101 and the second humidity detector 102 may be conventional humidity sensors.
The balance ventilation valve of this embodiment has the protruding portion 11 located outside after being mounted on the mounting surface of the case, and the case 1 and other components are located inside the case. When the first humidity sensor detects that the external humidity is X1, the second humidity sensor detects that the humidity of the inner cavity (i.e. the inside of the box) of the housing 1 is X2, and the difference between the humidity of the external gas and the humidity of the gas in the box is Δx=x1-X2. In a normal state, the second sealing body 5 is far away from the first sealing body 4, the first waterproof and breathable film 2 is in a communication state with the inner cavity of the shell 1, and at the moment, deltaX is at a preset value; when X1 in the external environment changes, deltaX is higher than or lower than a preset value, the controller controls the coil 32 in the driving mechanism 3 to be electrified according to the information, the electrified coil 32 generates electromagnetic force to drive the plate to drive the first elastic sealing body on the plate to move towards the first groove, the extending part 61 of the plate moves upwards in the guide groove 12, the spring is stretched to store energy, the first elastic sealing body is clamped into the first groove to seal the first cavity 7, the first waterproof and breathable film 2 and the inner cavity of the shell 1 are in an isolated state, so that external water vapor can be prevented from entering the inner cavity of the shell 1, or the water vapor in the inner cavity of the shell 1 flows to the outside through the first waterproof and breathable film 2, so that the humidity of the internal environment of the box is always kept in a constant state, and normal operation of elements in the box is ensured. When Δx reaches a preset value again and is in a stable state, the controller controls the coil 32 to be electrified reversely or stops electrifying, the coil 32 applies a force to the second sealing body 5 in a direction away from the first sealing body 4 or does not generate electromagnetic force to the second sealing body 5, under the reset action of the tension spring, the spring releases energy to drive the second sealing body 5 to move in a direction away from the first sealing body 4, so that the second sealing body 5 is reset to an initial state, and the spring is in an initial compression state again so as to complete the dynamic sealing process of the balance ventilation valve according to humidity.
In addition, when other unusual accidents occur in the box, huge pressure is generated in the box, the air pressure applies outward acting force to the second waterproof breathable film 63 through the channel on the partition board, so that the second waterproof breathable film 63 bends towards the second puncture part 64, the second puncture part 64 punctures the second waterproof breathable film 63, no matter the second sealing body 5 and the first sealing body 4 are in a separated or sealed state at this time, the air pressure enters the first cavity 7 and applies outward acting force to the first waterproof breathable film 2, the first puncture part punctures the first waterproof breathable film 2, and the high pressure in the box can be released, so that the air pressure in the box is consistent with the external air pressure, and explosion phenomenon in the box is prevented.
The thickness of the elastic sealing member 14 is higher than the height of the mounting groove 13 in the free state, the original free state is changed into a compressed state, and the elastic sealing gasket transversely extends while being deformed and contracted vertically, so that the through hole of the elastic sealing gasket and the outer wall surface of the mounting table 15, the peripheral side wall of the elastic sealing gasket and the inner wall surface of the mounting groove 13 can be in a tight sealing state, and the transverse deformation clearance limits the transverse deformation amount of the elastic sealing member 14; meanwhile, when the elastic sealing element 14 is deformed vertically, the elastic sealing element 14 is pressed into the mounting groove 13 integrally and tightly, the top surface of the elastic sealing element is level with the top surface of the mounting groove 13, and the state is kept, so that when the fastener applies acting force, the deformation of the elastic sealing element 14 in the vertical direction can be controlled well (by taking the top surface of the mounting groove 13 as a reference), and the installation is convenient while the balance of the sealing performance of the ventilation valve is ensured.
Secondly, after the fastening piece is fastened, the frame-shaped bulge 141 and the annular bulge 142 are tightly pressed with the mounting surface, even if the mounting surface is not in a horizontal plane, the mounting surface is partially concave or convex, the flatness of the mounting surface is compensated by the different degrees of compression of the frame-shaped bulge 141 and the annular bulge 142, the mounting surface can be always in a sealing state with the elastic sealing piece 14, the gap between the top surface of the shell 1 and the mounting surface is tightly sealed, so that the sealing performance of the balanced ventilation valve is improved, and the protection grade of the box body is ensured to meet the required requirement, such as IP67, namely the box body is soaked under water for 30 minutes, and no water seepage exists in the box body after the balanced ventilation valve is arranged on the box body.
As a modification, the protective cover 16 described above may not be provided. As a modification, the above-described controller may not be provided, and the opening or closing of the driving mechanism 3 may be manually controlled by a person.
As an alternative embodiment, the annular projection 142 in the first region of the resilient seal 14 may also be separated from the frame-shaped projection 141 without overlapping regions. As a deformation of the mounting table 15, the number of the mounting tables 15 may be three, five, six, etc., and only the mounting tables 15 are uniformly distributed in the mounting groove 13, so that the top of the housing 1 is conveniently and sealingly connected with the mounting surface. As a further variant, it is also possible to provide the first region of the elastic seal 14 with blind holes directly in the top surface of the housing 1 without the mounting table 15.
As a modification of the fixing member, the fixing member may also be other fixing structures such as an adhesive member provided between the mounting surface and the top surface of the housing 1, and a pressure mechanism provided on the top surface of the mounting surface so that the mounting surface presses the elastic seal 14 on the top surface of the housing 1, thereby sealing the gap between the mounting surface and the top surface of the housing 1.
Preferably, the frame-shaped protrusion 141 is formed using a sealing ring; as a further modification, the top surface of the elastic sealing member 14 may be provided with no frame-shaped projection 141, and the case may be directly pressed against the top surface of the elastic sealing member 14.
As a variant, the elastic sealing member 14 may be other conventional elastic sealing structures besides an elastic sealing gasket, and may be made of an elastic material having a desired compression deformation amount.
As a further modification, the mounting groove 13 and the elastic seal 14 provided in the mounting groove 13 may not be provided on the top surface of the housing 1, and the protruding portion 11 may be provided on the top surface of the housing 1.
As a further modification, the movable member 6 may not be provided with the second waterproof and breathable film 63 and the driving mechanism 3 may not be provided with the second puncture member 64, and the movable member 6 may not be provided with the first through hole 62, so that when the air pressure in the case needs to be released, the movable member 6 is required to be away from the first sealing body 4, and the air pressure in the case may enter the first cavity 7 through the gap between the movable member 6 and the inner wall surface of the case 1, and then be discharged to the outside through the first waterproof and breathable film 2.
As a modification, there may be three, five, six, or the like extending portions 61 provided at the edge of the movable member 6, and it is only necessary to provide at least three extending portions for smoothly disposing the movable member 6 in the housing 1, and the number of the guide grooves 12, the elastic members 9, and the fixing members 8 may be three, five, six, or the like, respectively. As a further modification, the movable member 6 may be provided in the housing 1 by only the engagement of the fixed plate and the elastic member 9 without providing the extension 61 and the guide groove 12.
As a further variant, the above-mentioned fixing element 8 can be, in addition to a fixing plate, also other supporting structures, for example a boss. The elastic member 9 may be other elastic structures besides a spring, and may be a spring that can apply a tensile force to the movable member 6 in a direction away from the first sealing body 4.
As a further modification, the fixing member 8 and the elastic member 9 may not be provided, and other sliding structures may be provided to set the movable member 6 in the housing 1, for example, a slide rail may be provided on an inner wall surface of the housing 1, a slider may be provided on a side wall of the movable member 6, and the slider may be provided on the slide rail.
As a modification of the movable member 6, the movable member 6 may have other structures besides a plate, and the top surface of the movable member may be provided with the second sealing body 5, and the first sealing body 4, the second sealing body 5, and the driving mechanism 3 may enclose the first cavity 7.
As a deformation of the first groove, the shape of the first groove and the shape of the first elastic sealing body may be other shapes, for example, elliptical, square or polygonal, and the like, and only the two shapes are matched to play a role in sealing.
As a deformation of the first sealing body 4 and the second sealing body 5, the first sealing body 4 is a second elastic sealing body protruding and formed on the bottom surface of the recess 311, and the second sealing body 5 is a second groove which is opened on the movable member 6 and can be tightly clamped in by the second elastic sealing body.
As a further modification, the first sealing body 4 and the second sealing body 5 may be other sealing bodies, for example, the first sealing body 4 is an annular sucker, and the second sealing body 5 is an elastic body capable of being adsorbed on the annular sucker, so that the first sealing body 4 and the second sealing body 5 are in sealing fit or fall off. Alternatively, the sealing structure is formed by adopting the existing air extraction structure to form a negative pressure adsorption relationship.
As a deformation of the concave portion 311, the top of the concave portion 311 may be directly fixed on the top inner wall surface of the housing 1 without providing the second outer edge 313, so that the concave portion 311 may surround the first waterproof and breathable film 2. Further, the recess 311 may not be provided with the first outer edge 312, and at this time, the bottom of the recess 311 is not a first opening that is fully opened, but a second channel that communicates the first waterproof and breathable film 2 with the first cavity 7 is provided, and the first sealing body 4 is directly fixed on the bottom of the recess 311. Or, in a further modification, the supporting body 31 may be of another structure, for example, a supporting plate or a sleeve with a through hole, where the supporting plate is fixed on the inner surface of the casing 1 in a sealing manner, and is sleeved on the first waterproof and breathable film 2, the first sealing body 4 is fixed on the bottom of the supporting body 31, and the supporting plate, the first sealing body 4, the second sealing body 5 and the movable component 6 enclose a first cavity 7, and the first waterproof and breathable film 2 is located in the first cavity 7. When the moving part 6 is driven to move by the energizing coil 32, the moving part 6 is made of a magnetic material, such as magnetic steel or magnet.
As a modification of the driving mechanism 3, the driving mechanism 3 may be other driving structures, for example, a motor or a cylinder, in which a driving shaft of the telescopic shaft or the cylinder of the motor is connected to the movable member 6, so as to drive the movable member 6 to move toward or away from the first sealing body 4, at this time, the motor or the cylinder is sealed and fixed on the housing 1, the first sealing body 4 is fixed on the housing 1 of the motor or the cylinder, and the driving mechanism 3, the first sealing body 4, the second sealing body 5, and the movable member 6 enclose the first cavity 7. In this case, the movable member 6 may be made of other materials instead of the magnetic material.
As a further modification, the dynamic seal structure may be provided with only the driving mechanism 3, the first sealing body 4, and the second sealing body 5 without providing the movable member 6. At this time, the first sealing body 4 is arranged on the shell 1 in a sealing manner and surrounds the periphery of the first waterproof and breathable film 2, the second sealing body 5 is arranged opposite to the first sealing body 4 along the vertical direction, the first waterproof and breathable film 2 is positioned in a first cavity 7 enclosed between the first sealing body 4 and the second sealing body 5, and the driving mechanism 3 (such as a motor or a cylinder) drives the second sealing body 5 to move towards or away from the first sealing body 4, so that the second sealing body 5 is in sealing fit with or falls off from the first sealing body 4, and isolation or communication between the first waterproof and breathable film 2 and the inner cavity of the shell 1 is achieved.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (11)
1. A balanced ventilation valve comprising
A housing (1) having an inner cavity and a bottom opening, with a protrusion (11) on its top surface; at least one first channel which vertically extends to communicate the outside with the inner cavity is formed on the protruding part (11);
a first waterproof breathable film (2) fixed on the bottom surface of the protruding part (11);
the dynamic sealing structure is arranged on the shell (1) and positioned in the inner cavity and is used for sealing and isolating or communicating the first waterproof and breathable film (2) with the inner cavity of the shell (1);
the method is characterized in that: the dynamic sealing structure comprises a driving mechanism (3), a first sealing body (4) and a second sealing body (5) which is vertically opposite to the first sealing body (4); the driving mechanism (3) comprises a supporting body (31) which is fixed on the inner surface of the shell (1) in a sealing way and surrounds the periphery of the first waterproof and breathable film (2), and the first sealing body (4) is fixed on the bottom of the supporting body (31);
The dynamic sealing structure also comprises a movable part (6) which is arranged in the shell (1) and is positioned below the driving mechanism (3); the driving mechanism (3), the first sealing body (4), the second sealing body (5) and the movable part (6) form a first cavity (7);
the first waterproof breathable film (2) is located in the first cavity (7), and the driving mechanism (3) drives the second sealing body (5) to move towards or away from the first sealing body (4), so that the second sealing body (5) is in sealing fit with the first sealing body (4) or is separated from the first sealing body (4).
2. The balanced ventilation valve of claim 1, wherein: the driving mechanism (3) is fixed on the shell (1) in a sealing way, and the first sealing body (4) is fixed on the shell (1) through the driving mechanism (3);
the second sealing body (5) is fixed on the top surface of the movable part (6); the driving mechanism (3) drives the movable part (6) to drive the second sealing body (5) to move.
3. The balanced ventilation valve of claim 2, wherein: the movable part (6) is made of magnetic materials;
the driving mechanism (3) further comprises a coil (32) wound on the outer wall surface of the supporting body (31), and electromagnetic force for driving the movable part (6) to move vertically is generated after the coil (32) is electrified;
The first waterproof breathable film (2) stretches into the supporting body (31).
4. A balanced ventilation valve according to claim 3, characterized in that: the top of the support body (31) is provided with a concave part (311) suitable for embedding the first waterproof and breathable film (2), and a second channel for communicating the first waterproof and breathable film (2) with the first cavity (7) is formed in the concave part (311);
the first sealing body (4) is disposed on the bottom surface of the recess (311).
5. The balanced ventilation valve of claim 4, wherein:
the bottom surface of the concave part (311) is provided with a first outer edge (312) extending horizontally outwards, and the first sealing body (4) is fixed on the bottom of the first outer edge (312);
the bottom of the concave part (311) is provided with a first opening which is used as the second channel; the coil (32) is sleeved on the outer wall surface of the concave part (311) and is lapped on the first outer edge (312).
6. The balanced ventilation valve of claim 5, wherein:
the first sealing body (4) is a first groove formed on the bottom surface of the concave part (311), and the second sealing body (5) is a first elastic sealing body which is formed on the movable part (6) in a protruding mode and can be clamped into the first groove in a sealing mode; or alternatively
The first sealing body (4) is a second elastic sealing body which is formed on the bottom surface of the concave part (311) in a protruding mode, and the second sealing body (5) is a second groove which is formed on the movable part (6) and can be tightly clamped in by the second elastic sealing body.
7. The balanced ventilation valve according to any one of claims 2-6, characterized in that:
the device also comprises at least one fixed piece (8) fixed on the bottom of the shell (1) and positioned below the movable part (6), and an elastic part (9) arranged between the fixed piece (8) and the movable part (6); the elastic member (9) is capable of applying a pulling force to the movable member (6) in a direction away from the first sealing body (4).
8. The balanced ventilation valve of claim 7, wherein: the edge of the movable part (6) is provided with at least three extension parts (61) horizontally extending towards the inner wall surface of the shell (1);
guide grooves (12) which are in one-to-one correspondence with the extension parts (61) are formed in the inner wall surface of the shell (1);
the extension parts (61) extend into the guide grooves (12), the fixing pieces (8) are fixed on the bottoms of the guide grooves (12) in a one-to-one correspondence mode, and the elastic parts (9) are located in the guide grooves (12).
9. The balanced ventilation valve according to any one of claims 2-6, characterized in that:
a first through hole (62) is formed in the position, located in the second sealing body (5), of the movable part (6), and a second waterproof breathable film (63) for sealing the first through hole (62) is fixed on the surface, located on the same side as the second sealing body (5), of the first through hole (62);
a second puncture part (64) is arranged at the bottom of the driving mechanism (3), and the sharp end of the second puncture part (64) is opposite to the second waterproof breathable film (63) and forms a reserved gap with the second waterproof breathable film (63); and/or
The device also comprises a first humidity detector (101) which is arranged in the protruding part (11) and is communicated with the outside, and a second humidity detector (102) which is arranged on the bottom of the movable part (6);
a controller for controlling the opening or closing of the driving mechanism (3) according to the detection data of the first humidity detector (101) and the second humidity detector (102); and/or
The device further comprises a protective cover (16) arranged on the top of the protruding part (11), and the protective cover (16) is provided with at least one third channel.
10. The balanced ventilation valve according to any one of claims 1-6, characterized in that: an inward concave mounting groove (13) is formed in the periphery of the top surface of the shell (1) avoiding the protruding part (11); and also comprises
An elastic sealing element (14) which is arranged in the mounting groove (13), and a transverse deformation gap is reserved between the periphery of the elastic sealing element and the mounting groove (13); in the free state, the thickness of the elastic sealing element (14) is higher than the height of the mounting groove (13);
a fixing assembly for fixing the top of the housing (1) on a mounting surface of a case, the elastic sealing member (14) being located between the top surface of the housing (1) and the mounting surface;
under the fastening action of the fixing assembly, the mounting surface is forced to apply a compression force which contracts and deforms towards one side of the top surface to the elastic sealing element (14), the elastic sealing element (14) is integrally and tightly pressed into the mounting groove (13), and the top surface of the elastic sealing element is flush with the top surface of the mounting groove (13).
11. The balanced ventilation valve of claim 10, wherein:
-the top surface of the elastic seal (14) has an upwardly protruding frame-shaped protrusion (141) thereon, the frame-shaped protrusion (141) dividing the top surface of the elastic seal (14) into a first area inside the frame-shaped protrusion (141) and a second area outside the frame-shaped protrusion (141);
the fixing assembly fixes the housing (1) on the mounting surface through the first area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611208299.5A CN107061816B (en) | 2016-12-23 | 2016-12-23 | Balanced ventilation valve |
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| CN201611208299.5A CN107061816B (en) | 2016-12-23 | 2016-12-23 | Balanced ventilation valve |
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| CN107061816B true CN107061816B (en) | 2023-05-12 |
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| CN201611208299.5A Active CN107061816B (en) | 2016-12-23 | 2016-12-23 | Balanced ventilation valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109429445A (en) * | 2017-08-22 | 2019-03-05 | 湖南中车时代电动汽车股份有限公司 | A kind of water-proof ventilated device and the electric machine controller comprising it |
| CN110039986A (en) * | 2018-01-15 | 2019-07-23 | 舍弗勒技术股份两合公司 | Double-channel adapter for high-voltage box and high-voltage box of hybrid power module |
| EP3809027A4 (en) * | 2018-06-15 | 2022-05-11 | Zhejiang Sanhua Intelligent Controls Co., Ltd. | Electric valve |
| CN109163129B (en) * | 2018-09-21 | 2022-06-10 | 奇瑞汽车股份有限公司 | Cover plate structure of shell |
| CN109341660B (en) * | 2018-11-08 | 2024-04-30 | 天津理工大学 | Universal level meter |
| CN109707847B (en) * | 2019-01-23 | 2024-04-02 | 佛山市南海科日超声电子有限公司 | Go up to add water humidifier seal structure |
| CN113972077B (en) * | 2021-09-17 | 2023-12-15 | 国能浙江余姚燃气发电有限责任公司 | Novel GW20-252W2500 type isolating switch moving contact sealing device |
| CN116848716A (en) * | 2021-11-04 | 2023-10-03 | 宁德时代新能源科技股份有限公司 | Battery case assembly, battery and battery case assembly manufacturing method |
| CN114978409B (en) * | 2022-07-20 | 2022-11-22 | 深圳市安卫普科技有限公司 | Air inlet assembly, signal shielding device and signal shielding instrument |
| DE102022119112B4 (en) | 2022-07-29 | 2024-09-19 | Eugen Forschner Gmbh | Pressure compensation device for an electrochemical device |
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