The presently disclosed embodiments are related, in general, to a ventilation assembly.
More particularly, the presently disclosed embodiments are related to the ventilation assembly
mounted on a plurality of electrical components for providing air permeability and water and
dust resistance.
BACKGROUND
[0002] The subject matter discussed in the background section should not be assumed to be prior
art merely as a result of its mention in the background section. Similarly, a problem mentioned in
the background section or associated with the subject matter of the background section should
not be assumed to have been previously recognized in the prior art. The subject matter in the
background section merely represents different approaches, which in-and-of-themselves may
also be inventions.
[0003] Typically, ventilation assemblies are used for providing ventilation between the inside
and the outside of a housing and reducing pressure variation inside the housing. Further,
ventilation assemblies are fixed to housings of in-vehicle electrical components such as lamps,
inverters, converters, electronic control units (ECUs), battery packs, radars, and cameras, and
various electronic devices for home use, medical use, office use, etc. There are a few ventilation
assemblies that provide various ventilation properties such as dust proofness, and water
proofness. Indian patent application 2709/DELNP/2015 filed by Kyoko Ishii et al. discloses a
2
ventilation member, provided with: a cylindrical inside member which is fitted to an opening
part and which has a through-hole as a part of a ventil between the space inside and the space
outside of a casing, the through-hole not being provided with a waterproof ventilation membrane
attached to the closed bottomed cylindrical outside member fitted to the outer circumferential
part of the inside member and used to cover the opening of the through-hole inside member and
the outside member are formed of a hydrophobic material having an angle of contact with water
of 80° or greater.
[0004] Further, Indian patent application 7367/DELNP/2008 filed by Youzou Yano et al. talks
about a ventilation member comprises a support body, a ventilation membrane, and a cover part.
The support body includes a bottom surface portion of the casing and a side surface portion on
which the ventilation membrane is installed. A first opening is formed in the bottom surface
portion, and the opening is formed in the side surface portion. The ventilation membrane is
installed on the side surface portion to close the second opening part has a cylindrical side wall
part that circumferentially surrounds the support body in such a state that the support body is
assembled therein. The p second opening is to be formed in the side surface portion of the
support body.
[0005] This specification recognizes that there is a necessity for an efficient and improved
ventilation assembly for providing air permeability and water and dust resistance.
[0006] Thus, in view of the above, there is a long-felt need in the industry to address the
aforementioned deficiencies and inadequacies.
3
[0007] Further limitations and disadvantages of traditional approaches will become apparent to
one of skill in the art, through comparison of described systems with some aspects of the present
disclosure, as set forth in the remainder of the present application and with reference to the
drawings.
SUMMARY
[0008] A ventilation assembly for providing air permeability and water and dust resistance is
provided substantially, as shown in and/or described in connection with at least one of the
figures.
[0009] An aspect of the present disclosure relates to a ventilation assembly mounted on a
plurality of electrical components for providing air permeability and water and dust resistance.
The ventilation assembly includes a rubber member, a gas-permeable membrane, and a cover.
The rubber member is fitted on a circular pipe structure present in a housing of electrical
components. The rubber member is made of Thermoplastic Vulcanisate (TPV) material. The gaspermeable membrane is fitted at the top of a bottom portion of the rubber member to disallow the
water and dust to pass through. the gas-permeable membrane is made of expanded
polytetrafluoroethylene (ePTFE) material. The cover encloses the rubber member and the gaspermeable membrane. The cover is made of polypropylene (PP).
[0010] In an aspect, the cover is a plastic cap.
[0011] In an aspect, the ventilation assembly acts as a breather cap.
[0012] In an aspect, the rubber member is welded to the gas-permeable membrane by utilizing a
rubber welding process.
[0013] Accordingly, one advantage of the present invention is that it efficiently provides
providing air permeability and water and dust resistance.
5
[0014] Accordingly, one advantage of the present invention is that it provides various properties
such as dust proofness for preventing entry of dust into housings, and water proofness for
preventing entry of water into housings.
[0015] These and other features and advantages of the present disclosure may be appreciated
from a review of the following detailed description of the present disclosure, along with the
accompanying figures in which reference numerals refer to like parts throughout.
6
BRIEF DESCRIPTION OF DRAWINGS
[0016] The accompanying drawings illustrate the various embodiments of systems, methods, and
other aspects of the disclosure. Any person with ordinary skills in the art will appreciate that the
illustrated element boundaries (e.g., boxes, groups of boxes, or other shapes) in the figures
represent one example of the boundaries. In some examples, one element may be designed as
multiple elements, or multiple elements may be designed as one element. In some examples, an
element shown as an internal component of one element may be implemented as an external
component in another and vice versa. Further, the elements may not be drawn to scale.
[0017] Various embodiments will hereinafter be described in accordance with the appended
drawings, which are provided to illustrate and not to limit the scope in any manner, wherein
similar designations denote similar elements, and in which:
[0018] FIG. 1 is an exploded view of a ventilation assembly, in accordance with at least one
embodiment.
[0019] FIG. 2 is an assembled view of the ventilation assembly, in accordance with at least one
embodiment.
[0020] FIG. 3 is a perspective view of a rubber member of the ventilation assembly, in
accordance with at least one embodiment.
[0021] FIG. 4 is a perspective view of a cover of the ventilation assembly, in accordance with at
least one embodiment.
7
DETAILED DESCRIPTION
[0022] The present disclosure may be best understood with reference to the detailed figures and
description set forth herein. Various embodiments are discussed below with reference to the
figures. However, those skilled in the art will readily appreciate that the detailed descriptions
given herein with respect to the figures are simply for explanatory purposes as the apparatuses,
methods, and systems may extend beyond the described embodiments. For example, the
teachings presented and the needs of a particular application may yield multiple alternative and
suitable approaches to implement the functionality of any detail described herein. Therefore, any
approach may extend beyond the particular implementation choices in the following
embodiments described and shown.
[0023] References to “one embodiment,” “at least one embodiment,” “an embodiment,” “one
example,” “an example,” “for example,” and so on indicate that the embodiment(s) or
example(s) may include a particular feature, structure, characteristic, property, element, or
limitation but that not every embodiment or example necessarily includes that particular feature,
structure, characteristic, property, element, or limitation. Further, repeated use of the phrase “in
an embodiment” does not necessarily refer to the same embodiment.
[0024] FIG. 1 is an exploded view (100) of a ventilation assembly, in accordance with at least
one embodiment. The ventilation assembly (200) includes a rubber member (102), a gaspermeable membrane (104), and a cover (106). FIG. 2 is an assembled view of the
ventilation assembly (200), in accordance with at least one embodiment. FIG. 2 is explained in
8
conjunction with FIG. 1. The ventilation assembly (200) is mounted on a plurality of electrical
components for providing air permeability and water and dust resistance FIG. 3 is a perspective
view of a rubber member (102) of the ventilation assembly, in accordance with at least one
embodiment. The rubber member (102) is fitted on a circular pipe structure present in a housing
of electrical components. The rubber member (102) is made of Thermoplastic Vulcanisate (TPV)
material. Thermoplastic vulcanizates (TPVs) are special classes of thermoplastic elastomers, in
which dynamic vulcanization of the rubber phase takes place during melt mixing with a
semicrystalline thermoplastic matrix phase at elevated temperature.
[0025] The present specification further provides a following table 1 that depicts property of
rubber member’s material Thermoplastic Vulcanisate (TPV).
Table 1:
Items Unit Test Method Standard Typical
Value
Hardness Shore A ASTM
D2240
55±5 54
Density g/cm³ ASTM D792 0.9-0.96 0.94
Tensile
Strength
MPa ASTM D
412
≥3.0 3.6
Elongation
Break
% ASTM D
412
≥400 437
Tear
Strength
kN/m ASTM D
624
≥16 21
Compression
set
% ASTM D
395
≤48 45.7
Appearances / Visualization Uniform Uniform
particle particle
Fogging
value
--- SY-DQ-69-
2010
--- ≤200ug/g
9
The data is only for reference when choosing products.
[0026] The gas-permeable membrane (104) is fitted at the top of a bottom portion of the rubber
member (102) to disallow the water and dust to pass through. In an embodiment, the rubber
member (102) is welded to the gas-permeable membrane (104) by utilizing a rubber welding
process. The rubber welding process is used to weld the rubber member (102) and the gaspermeable membrane (104) together, instead of pasting the gas-permeable membrane (104) on
the rubber member (102). Typical pasting can be removed easily if a user tries to pull it out, but
when it is rubber welded it's not easy to remove the gas-permeable membrane (104) from the
rubber member (102).
[0027] The gas-permeable membrane (104) is made of expanded polytetrafluoroethylene
(ePTFE) material. Typically, ePTFE membrane films are hydrophobic. When formed into
membranes, films, laminates, and tubular shapes, ePTFE can be used to manufacture medical
accessories including vent caps, IV administration sets, spike vents, surgical smoke filters, and
suction filters. ePTFE also has a nanofibrillar structure that is suitable for use as a cell culture
surface. ePTFE surfaces provide a biomimetic environment for more consistent and reproducible
in vivo-like cell phenotypes.
[0028] The present specification further provides a following table 2 that depicts the property of
gas-permeable membrane’s material ePTFE.
Table 2:
Items Unit Test
Method Value
10
Density g/cm³ ASTM D
792
2.1-2.3
Melting Point ℃ ASTM D
1457
327
Water
Absorption
% ASTM
D570
>0.01
Tensile
Strength
MPa ASTM
D638
15-30
Elongation
Break
% ASTM
D638
200-350
Hardness Shore A ASTM
D2240
50-65
Compressive
strength1%10%
ASTM
D695 25
5-6/15-16
Impact
Strength
Ft-lb/in ASTM
D256 23
3
Heat
conductivity
Cal/cm ASTM
C177
6x10 -4
Max Tem for
continuous
℃ 260
Dielectric
Constant 60Hz
ASTM
D150
327
Combustibility ℃ ASTM
D635
Non
Weather ability H
The data is only for reference when choosing
products.
[0029] FIG. 4 is a perspective view of a cover (106) of the ventilation assembly, in accordance
with at least one embodiment. The cover (106) encloses the rubber member (102) and the gaspermeable membrane (104). The cover (106) is made of polypropylene (PP). In an embodiment,
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the cover (106) is a plastic cap. In an embodiment, the ventilation assembly (200) acts as a
breather cap. Typically, polypropylene (PP) is a linear hydrocarbon polymer, expressed as
CnH2n. PP, like polyethylene (see HDPE, L/LLDPE) and polybutene (PB), is a polyolefin or
saturated polymer. Polypropylene is one of those most versatile polymers available with
applications, both as a plastic and as fiber, in virtually all of the plastics end-use markets.
[0030] The present specification further provides a following table 3 that depicts the property of
the cover’s material polypropylene (PP).
Table 3:
Items Unit Test
Method
Standard Typical
Value
Melt Index g/10min ISO1133 7-Mar 6
Density g/cm³ ISO1183 0.9±0.05 0.95
Melting Point ℃ DSC … …
Heat
Deflection
Temp
℃ ISO75 115±10 110
Vicat
Softening
Temp
℃ ISO306 150±10 155
Tensile
Strength at
Yield
Kg/cm² ISO527 350±5 350
Tensile
Elongation at
Break
% ISO527 ≥400 450
Rockwell
Hardness
R scale ISO2039 100±5 105
Flexural
Modulus
Kg/cm² ISO178 ≥13000 15000
12
IZOD Impact
Strength
Kg/cm/cm ISO180 ≥4 5.5
Mold
Shrinkage
% FPC
Method
1.3-1.7 1.3-1.7
The data is only for reference when choosing products.
[0031] Thus, the present invention provides a ventilation assembly that has various properties
such as dust proofness for preventing entry of dust into housings, and water proofness for
preventing entry of water into housings.
[0032] A person skilled in the art will understand that the ventilation assembly is described
herein for illustrative purposes and should not be construed to limit the scope of the disclosure.
[0033] A person with ordinary skills in the art will appreciate that the assembly and apparatus
have been illustrated and explained to serve as examples and should not be considered limiting in
any manner. It will be further appreciated that the variants of the above-disclosed system
elements, modules, and other features and functions, or alternatives thereof, may be combined to
create other different apparatuses, systems, or applications.
[0034] While the present disclosure has been described with reference to certain embodiments, it
will be understood by those skilled in the art that various changes may be made and equivalents
may be substituted without departing from the scope of the present disclosure. In addition, many
modifications may be made to adapt a particular situation or material to the teachings of the
present disclosure without departing from its scope. Therefore, it is intended that the present
disclosure not be limited to the particular embodiment disclosed, but that the present disclosure
will include all embodiments falling within the scope of the appended claims.

CLAIMS
I/We Claim
1. A ventilation assembly (200) mounted on a plurality of electrical components for
providing air permeability and water and dust resistance, the ventilation assembly (200)
comprising:
a rubber member (102) fitted on a circular pipe structure present in a housing of electrical
components;
a gas-permeable membrane (104) is fitted at the top of a bottom portion of the rubber
member (102) to disallow the water and dust to pass through; and
a cover (106) to enclose the rubber member (102) and the gas-permeable membrane
(104).
2. The ventilation assembly (200) as claimed in claim 1, wherein the rubber member (102)
is made of Thermoplastic Vulcanisate (TPV) material.
3. The ventilation assembly (200) as claimed in claim 1, wherein the gas-permeable
membrane (104) is made of expanded polytetrafluoroethylene (ePTFE) material.
4. The ventilation assembly (200) as claimed in claim 1, wherein the cover (106) is a plastic
cap.
5. The ventilation assembly (200) as claimed in claim 1, wherein the cover (106) is made of
polypropylene (PP).
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6. The ventilation assembly (200) as claimed in claim 1, wherein the rubber member (102)
is welded to the gas-permeable membrane (104) by utilizing a rubber welding process.