Ventilation unit and quick connector

Abstract

The present invention provides a ventilation unit and a quick connector including the ventilation unit. The ventilation unit includes: a shell, the shell including a shell body having a vent hole and a convex rib extending from the shell body and surrounding the vent hole; a cover member, the cover member having a central axis and including an end wall and a circumferential wall extending from the end wall, the cover member being adapted to engage the convex rib so that the end wall faces the vent hole and the circumferential wall surrounds the vent hole. The circumferential wall includes a first wall segment and a second wall segment adjacent to each other in the circumferential direction of the cover member, the first wall segment and the second wall segment being separated from each other and the first wall segment being closer to the central axis of the cover member than the second wall segment, so as to form a first gap therebetween that allows fluid to flow through in the circumferential direction. The ventilation unit and the quick connector including the ventilation unit according to the present invention can provide a path that allows fluid exchange between the inside of the ventilation unit and the outside, thereby achieving better ventilation and drainage effects.

Description

Technical Field

[0001] The present invention generally relates to a ventilation unit and a quick connector including the ventilation unit. Background Art

[0002] Currently, many electrical components are equipped with ventilation units to facilitate air circulation inside and outside the housing and prevent foreign matter from entering the housing. For example, in the automotive industry, ventilation units can be installed on electrical components such as headlights, taillights, and differential pressure sensors.

[0003] Among them, the differential pressure sensor can be set between a chamber to be tested, such as an oil tank or a pipeline, and a reference chamber. The reference chamber is usually connected to the outside gas to maintain it at atmospheric pressure. The differential pressure sensor can obtain the pressure difference between the chamber to be tested and the reference chamber, thereby deriving the pressure of the chamber to be tested. Generally, the ventilation unit used for the differential pressure sensor may include a vent, a breathable membrane arranged on the vent, and a protective structure. The reference chamber can maintain gas communication with the outside world through the vent and the breathable membrane, so that the reference chamber is always kept at atmospheric pressure. The protective structure can protect the breathable membrane from damage.

[0004] It is expected that the protective structure of the ventilation unit can prevent external dust and liquid (rainwater, pressurized water jet) from covering the breathable membrane and affecting the permeability of the breathable membrane, while providing a good ventilation path to keep the reference chamber at atmospheric pressure at all times. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide an improved ventilation unit and a quick connector including the ventilation unit.

[0006] According to a first aspect of the present invention, a ventilation unit is provided, which includes: a shell, the shell including a shell body having a ventilation hole and a convex rib extending from the shell body and surrounding the ventilation hole; a cover member, the cover member having a central axis and including an end wall and a circumferential wall extending from the end wall, the cover member being suitable for engaging the convex rib so that the end wall faces the ventilation hole and the circumferential wall surrounds the ventilation hole, wherein the circumferential wall includes a first wall segment and a second wall segment adjacent to each other in a circumferential direction of the cover member, the first wall segment and the second wall segment being separated from each other and the first wall segment being closer to the central axis of the cover member than the second wall segment, so as to form a first gap between the first wall segment and the second wall segment allowing fluid to flow through in the circumferential direction.

[0007] By arranging the circumferential wall of the cover member to include a first wall segment and a second wall segment adjacent to and separated from each other and making the first wall segment closer to the central axis of the cover member than the second wall segment to form a first gap therebetween that allows fluid to flow through in a circumferential direction, the interior of the cover member is allowed to communicate with the external fluid so that the interior of the cover member is maintained at atmospheric pressure, and the liquid in the cover member is allowed to be discharged through the first gap when the ventilation unit is placed in a non-horizontal orientation.

[0008] According to the above technical concept, the present invention may further include any one or more of the following optional forms.

[0009] In some optional forms, the circumferential wall is arranged to surround the entire vent hole. In other words, the vent hole is shielded by the circumferential wall along its entire circumference, so that foreign matter such as dust from the outside cannot enter the cover member in the radial direction of the cover member and fall on the breathable membrane covering the vent hole, thereby achieving a good dustproof effect.

[0010] In some optional forms, the circumferential wall includes a plurality of first wall segments and a plurality of second wall segments, and the first wall segments and the second wall segments are alternately arranged in the circumferential direction.

[0011] In some optional forms, the first wall segment and the second wall segment both extend substantially parallel to the central axis and have an arcuate cross-section, and a radius of the arcuate cross-section of the first wall segment is smaller than a radius of the arcuate cross-section of the second wall segment.

[0012] In some optional forms, the convex rib has a first limiting portion, and the cover member has a second limiting portion provided on the first wall segment, and the first limiting portion is adapted to engage with the second limiting portion to prevent the cover member from separating from the convex rib.

[0013] In some optional forms, the cover member has a first protrusion protruding from the end wall toward the interior of the cover member, and the first protrusion is suitable for abutting against the top of the convex rib to form a second gap between the end wall and the top of the convex rib, wherein the first gap is connected to the second gap.

[0014] In some optional forms, the cover member has a second protrusion protruding from the second wall section toward the interior of the cover member, and the second protrusion is suitable for abutting against a side of the convex rib facing away from the vent hole.

[0015] In some optional forms, the ventilation unit includes a breathable membrane disposed on the outer surface of the housing body and covering the vent hole, and the free end surface of the circumferential wall is closer to the outer surface of the housing body than the top surface of the breathable membrane. This can help prevent foreign matter such as dust from falling onto the top surface of the breathable membrane.

[0016] In some optional forms, the rib includes a plurality of rib segments, and the plurality of rib segments are spaced around the vent such that an opening is formed between adjacent rib segments.

[0017] In some optional forms, the shell body is provided with a groove recessed relative to the outer surface of the shell body, the groove is provided on the outside of the convex rib away from the vent hole and is connected to the opening for discharging liquid at and / or near the breathable membrane.

[0018] In some optional forms, the channel includes a bottom wall and a first side wall and a second side wall located on opposite sides of the bottom wall, wherein at least one of the bottom wall, the first side wall and the second side wall has a slope to guide liquid entering the channel to drain along the channel.

[0019] In some optional forms, the convex rib has a first limiting portion, and the cover member has a second limiting portion arranged on the first wall section, the first limiting portion is suitable for engaging with the second limiting portion to prevent the cover member from disengaging from the convex rib, the second limiting portion is in the form of a protrusion and extends from the first wall section toward the interior of the cover member, and the width of the second limiting portion is greater than the width of the opening.

[0020] According to a second aspect of the present invention, a quick connector is provided, comprising a connector body, a pressure sensor module installed in the connector body, and a ventilation unit according to the first aspect of the present application, wherein the ventilation unit is suitable for being installed to the connector body, and the ventilation unit and the connector body jointly define a pressure reference chamber for the pressure sensor module.

[0021] The ventilation unit and the quick connector including the ventilation unit according to the present invention can provide a path allowing fluid exchange between the interior of the ventilation unit and the outside, thereby achieving better ventilation and drainage effects, while also having better dustproof function. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features and advantages of the present invention will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar components, wherein:

[0023] Figure 1 shows a perspective view of a quick connector according to an exemplary embodiment of the present invention;

[0024] Figure 2 Shown Figure 1 A cross-sectional view of a quick connector in FIG;

[0025] Figure 3A and Figure 3B respectively show a perspective view and a cross-sectional view of a ventilation unit according to an exemplary embodiment of the present invention;

[0026] Figure 4 Shown Figure 3A Exploded view of the ventilation unit;

[0027] Figure 5A and Figure 5B Shown respectively Figure 3A A perspective view and a top view of the housing of the ventilation unit;

[0028] Figure 6A and Figure 6B Shown respectively Figure 3A Cross-sectional views of the housing of the ventilation unit viewed from different angles;

[0029] Figure 7A and Figure 7B Shown respectively Figure 3A A perspective view and a cross-sectional view of a cover member of a ventilation unit; and

[0030] Figure 8A and Figure 8B Shown respectively Figure 3A Top view and bottom view of the cover member of the ventilation unit. DETAILED DESCRIPTION

[0031] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of specific ways of implementing and using the invention and do not limit the scope of the invention. When describing the structural positions of the various components, such as up, down, top, bottom and other directional expressions, they are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure are changed, these directional expressions also change accordingly. Unless otherwise stated, the top and bottom directional expressions used in this article when describing the ventilation unit are for the ventilation unit with Figure 3B This is in terms of the orientation arrangement.

[0032] In the present invention, the axial direction of a cylindrical or annular component refers to the direction along the central axis of the component, the circumferential direction of a cylindrical or annular component refers to the direction along the circumference of the component, and the radial direction of a cylindrical or annular component refers to the direction passing through the central axis of the component and perpendicular to the axial direction of the component.

[0033] Figure 1 and Figure 2 A quick connector 10 according to an exemplary embodiment of the present invention is shown.

[0034] Reference Figure 1 and Figure 2 The quick connector 10 may include a connector body 100 , a pressure sensor module 200 installed in the connector body 100 , and a vent unit 300 installed to the connector body 100 .

[0035] In the illustrated embodiment, the connector body 100 may include a first section 102 and a second section 104 that are substantially perpendicular to each other. Optionally, the pressure sensor module 200 may be a differential pressure sensor module. The pressure sensor module 200 may be disposed at the junction of the first section 102 and the second section 104 of the connector body 100. The ventilation unit 300 may be mounted to the first section 102 and, together with the first section 102, define a pressure reference chamber 106 located on one side of the pressure sensor module 200. The pressure reference chamber 106 may be fluidically connected to the outside world through the ventilation unit 300, thereby always being maintained at atmospheric pressure. The second section 104 of the connector body 100 may be in the form of a quick-connect connector to be connected to and fluidically connected to a fluid container (fluid pipeline, fluid tank, etc.), thereby being at the same pressure as the interior of the fluid container. The second section 104 defines a pressure-to-be-measured chamber 108 located on the other side of the pressure sensor module 200.

[0036] Thus, the pressure difference between the pressure-test chamber 108 and the pressure reference chamber 106 can be measured by the pressure sensor module 200, and then the pressure inside the pressure-test chamber 108 (i.e., the pressure inside the fluid container connected to the connector body 100) can be obtained based on the pressure inside the pressure reference chamber 106 (i.e., atmospheric pressure).

[0037] Figures 3A to 8B The figure shows a ventilation unit 300 and its components according to an exemplary embodiment of the present invention. It is understood that the ventilation unit 300 according to the present invention is not limited to applications in differential pressure sensor modules or quick connectors; instead, the ventilation unit 300 according to the present invention can be widely used in various industries for applications requiring ventilation, waterproofing, and dustproofing. Taking the automotive industry as an example, the ventilation unit 300 can also be installed on electrical components such as headlights and taillights.

[0038] Reference Figures 3A to 4 The ventilation unit 300 may include a housing 302, a gas permeable membrane 304, and a cover member 306. The housing 302 may include a housing body 310 having a gas vent 308 and a rib 312 extending from the housing body 310 and surrounding the gas vent 308. The gas permeable membrane 304 is used to cover the gas vent 308. The cover member 306 may have a central axis A and include an end wall 314 and a circumferential wall 316 extending from the end wall 314. The cover member 306 may engage the rib 312 so that the end wall 314 faces the gas vent 308 and the circumferential wall 316 surrounds the gas vent 308.

[0039] Reference Figures 5A to 6B In the illustrated embodiment, the shell body 310 may have a base wall 318. The base wall 318 of the shell body 310 may have a substantially planar outer surface. Figure 2 and Figure 3B The vent hole 308 may penetrate the base wall 318, and the gas permeable membrane 304 may be disposed on the outer surface of the base wall 318 (in other words, the mounting surface of the gas permeable membrane 304 may partially overlap with the outer surface of the base wall 318) and cover the vent hole 308. Optionally, the gas permeable membrane 304 is configured to allow gas to pass through while preventing liquid from passing through, thereby allowing the pressure reference chamber 106 to exchange gas with the outside while preventing liquid from the outside from entering the pressure reference chamber 106 and contaminating the pressure sensor module 200. Optionally, the gas permeable membrane 304 may be a porous membrane made of a polymer.

[0040] Return to reference Figures 5A to 6B In the illustrated embodiment, the shell body 310 may further include side walls 320a, 320b, 320c, and 320d connected to the base wall 318 and extending substantially perpendicularly thereto. Each of the side walls 320a, 320b, 320c, and 320d of the shell body 310 may be provided with a mounting protrusion 322 for mounting the shell body 310 to the connector body 100. In the illustrated embodiment, the shell body 310 may be substantially rectangular, with adjacent pairs of the side walls 320a, 320b, 320c, and 320d forming a right angle with each other. It will be appreciated that the shape of the shell body 310 is not limited thereto and may have any other suitable shape.

[0041] In the illustrated embodiment, the rib 312 of the housing 302 can extend from the base wall 318 in a direction generally perpendicular to the base wall 318 and away from the base wall 318. The rib 312 can include a plurality of rib segments 324 spaced about the vent 308 such that an opening 326 is formed between adjacent rib segments 324. In the illustrated embodiment, the rib 312 can include two rib segments 324 and form two openings 326; it will be appreciated that the rib 312 can also include more than two rib segments 324.

[0042] The base wall 318 of the housing 310 may be provided with a groove 328 recessed relative to the outer surface of the base wall 318. The groove 328 may be provided on the outer side of the rib 312, away from the vent 308, and communicate with the opening 326 to drain liquid from and / or near the breathable membrane 304. Liquid that falls onto or near the breathable membrane 304 on the inner side of the rib 312 due to, for example, rain or washing, can easily flow into the groove 328 through the openings 326 between the rib sections 324 and then drain along the groove 328. This prevents the following situation: liquid covering the breathable membrane 304 or freezing / freezing on the breathable membrane 304, thereby clogging the breathable membrane 304 and reducing its permeability, resulting in the pressure reference chamber 106 not being able to maintain the same pressure as the outside world at all times, and thus preventing the pressure sensor module 200 from accurately obtaining the pressure within the pressure chamber 108 to be measured. In the illustrated embodiment, two grooves 328 are symmetrically provided on the outer side of the rib 312 , and the two grooves 328 are respectively communicated with the two openings 326 .

[0043] Continue to refer to Figures 5A to 6B The channel 328 may include a bottom wall 330 and a first side wall 332 and a second side wall 334 located on opposite sides of the bottom wall 330, wherein the first side wall 332 is closer to the rib 312 than the second side wall 334. At least one of the bottom wall 330, the first side wall 332, and the second side wall 334 may have a slope to guide liquid entering the channel 328 to be discharged along the channel 328.

[0044] In the illustrated embodiment, the bottom wall 330 may be inclined and sloped relative to the outer surface of the base wall 318 of the housing body 310, and the first side wall 332 and the second side wall 334 may be inclined and sloped relative to the outer surfaces of the side walls 320a / 320c of the housing body 310. In this manner, liquid entering the channel 328 can be easily guided and discharged through the channel 328 when the vent unit 300 is positioned in various orientations. For example, when the vent unit 300 is positioned such that the base wall 318 of the housing body 310 is generally horizontal, liquid entering the channel 328 can be easily discharged along the bottom wall 330. When the vent unit 300 is positioned such that the side walls 320a / 320c of the housing body 310 are generally horizontal, liquid entering the channel 328 can be easily discharged along the first side wall 332 and / or the second side wall 334.

[0045] Reference Figure 3B 、 7A to 8BThe cover member 306 can engage the rib 312 of the housing 302 to prevent the cover member 306 from being separated from the housing 302. The circumferential wall 316 of the cover member 306 may include a first wall segment 336 and a second wall segment 338 adjacent to each other in the circumferential direction of the cover member 306. The first wall segment 336 and the second wall segment 338 may each be connected to the end wall 314 at one end and have a free end at the other end. The circumferential wall 316 may include a plurality of first wall segments 336 and a plurality of second wall segments 338, with the first wall segments 336 and the second wall segments 338 being arranged alternately in the circumferential direction. In the illustrated embodiment, the circumferential wall 316 includes four first wall segments 336 and four second wall segments 338.

[0046] Reference Figure 3B and Figure 7A , the rib 312 may have a first stopper 340, and the cover member 306 may have a second stopper 342 provided on the first wall section 336. The first stopper 340 may engage with the second stopper 342 to prevent the cover member 306 from being separated from the rib 312. In the illustrated embodiment, the first stopper 340 is in the form of a circumferential flange and extends away from the vent hole 308, and the second stopper 342 is in the form of a protrusion and extends from the first wall section 336 toward the interior of the cover member 306. Preferably, the width W1 (see FIG. 1 ) of the second stopper 342 of the cover member 306 is Figure 8B ) is greater than the width W2 of the opening 326 between the rib sections 324 (see Figure 6B ), so as to prevent the second limiting portion 342 of the cover member 306 from being stuck in the opening 326 during assembly or use of the ventilation unit 300.

[0047] It is understandable that the first limiting portion 340 and the second limiting portion 342 may also have other suitable forms. For example, the first limiting portion 340 may be in the form of a recess, and the second limiting portion 342 may be in the form of a matching protrusion.

[0048] Reference Figure 7A and Figure 8B, the first wall section 336 and the second wall section 338 of the circumferential wall 316 can be separated from each other, and the first wall section 336 is closer to the central axis A of the cover member 306 than the second wall section 338, so as to form a first gap 344 between the first wall section 336 and the second wall section 338, which allows fluid to flow through along the circumferential direction of the cover member 306. In this way, the interior of the cover member 306 can be in fluid communication with the outside through the first gap 344, so that the interior of the cover member 306 is always maintained at atmospheric pressure, and at the same time, when the vent unit 300 is placed in a non-horizontal orientation (i.e., the base wall 318 of the housing 302 is not horizontal), the liquid in the cover member 306 can be easily discharged through the first gap 344. For example, it will be understood that when the vent unit 300 is placed in a vertical orientation (i.e., the base wall 318 of the housing 302 is vertical), the liquid in the cover member 306 can be easily discharged through the first gap 344. Furthermore, compared to a case where circumferential wall 316 is continuous, since first wall segment 336 and second wall segment 338 are separated, first wall segment 336 has greater elasticity, which can reduce the external force applied to engage first stopper 340 of rib 312 with second stopper 342 of cover member 306, thereby facilitating installation of cover member 306. In the illustrated embodiment, a plurality of first wall segments 336 and a plurality of second wall segments 338 are alternately arranged in the circumferential direction to form a plurality of first gaps 344.

[0049] In the illustrated embodiment, the cover member 306 can have a generally cylindrical shape. The first wall section 336 and the second wall section 338 both extend generally parallel to the central axis A and have an arcuate cross-section. The radius of the arcuate cross-section of the first wall section 336 is smaller than the radius of the arcuate cross-section of the second wall section 338, so that the first wall section 336 is closer to the central axis A of the cover member 306 than the second wall section 338.

[0050] Reference Figure 2 、 Figure 3B and Figure 7A , the cover member 306 may further include a first protrusion 346 that protrudes from the end wall 314 toward the interior of the cover member 306. The first protrusion 346 may abut against the top of the rib 312, so that a second gap 348 is formed between the end wall 314 and the top of the rib 312. The first gap 344 and the second gap 348 are connected to each other, thereby facilitating the smooth discharge of liquid in the cover member 306 when the vent unit 300 is in various orientations. For example, when the vent unit 300 is oriented relative to the cover member 306, the vent unit 300 may be oriented relative to the cover member 306. Figure 3BWhen the orientation of the cover member 306 is inverted (i.e., the cover member 306 is located below the housing 302) or the ventilation unit 300 is positioned in a vertical orientation (i.e., the base wall 318 of the housing 302 is in the vertical direction), since the first gap 344 is connected to the second gap 348, the liquid in the cover member 306 can be smoothly discharged through the second gap 348 and the first gap 344 in sequence. It will be understood that the path for fluid exchange between the pressure reference chamber 106 / cover member 306 and the outside described here is only exemplary and not restrictive, and fluid exchange can also be carried out along other paths.

[0051] The cover member 306 may further include a second protrusion 350 that protrudes from the second wall section 338 toward the interior of the cover member 306. The second protrusion 350 may abut against the side of the rib 312 that faces away from the vent hole 308. On the one hand, when the second wall section 338 of the cover member 306 is subjected to a force perpendicular to the central axis A, the abutment between the second protrusion 350 and the rib 312 may provide support for the second wall section 338, thereby preventing the second wall section 338 from bending or being damaged. On the other hand, a gap may be formed between the second wall section 338 and the rib 312, allowing fluid to flow through along the circumferential direction of the cover member 306, thereby providing more fluid exchange paths.

[0052] In the illustrated embodiment, the first protrusion 346 and the second protrusion 350 are integrally formed. It is understood that the first protrusion 346 and the second protrusion 350 may also be provided separately.

[0053] Reference Figure 3A 、 Figure 3B 、 Figure 7A and Figure 8B The circumferential wall 316 can be provided to surround the entire vent hole 308. In other words, the vent hole 308 is shielded by the circumferential wall 316 in its entire circumferential direction, so that foreign matter such as dust from the outside cannot enter the cover member 306 in, for example, a radial direction and fall on the breathable membrane 304 covering the vent hole 308, thereby helping to reduce dust deposition on the breathable membrane 304.

[0054] like Figure 8B As shown, the circumferential wall 316 can be provided to exactly surround the entire vent hole 308. In other words, the adjacent first wall segments 336 and second wall segments 338 are exactly connected and hardly overlap or only slightly overlap when viewed along the radial direction R of the cover member 306. Alternatively, the circumferential wall 316 can also be provided to surround the entire vent hole 308 and make the adjacent first wall segments 336 and second wall segments 338 partially overlap when viewed along the radial direction R of the cover member 306. This can be achieved, for example, by setting the circumferential dimensions of the first wall segments 336 and / or the second wall segments 338 to be larger.

[0055] In addition, if Figure 3B As shown in FIG, the free end surface 352 of the circumferential wall 316 of the cover member 306 (formed by the free end surfaces of the first wall segment 336 and the second wall segment 338) is closer to the outer surface of the base wall 318 of the shell body 310 than the top surface 354 of the gas permeable membrane 304. In other words, Figure 3B In the embodiment, the free end surface 352 of the circumferential wall 316 is lower than the top surface 354 of the breathable membrane 304, which helps to prevent foreign matter such as dust from outside from passing through the gap between the free end surface 352 of the cover member 306 and the outer surface of the base wall 318 of the shell body 310 and falling onto the top surface 354 of the breathable membrane 304.

[0056] It should be understood that the various components and features described herein may be made of any suitable material, including but not limited to plastic, rubber, metal, and other materials or combinations of materials well known to those skilled in the art. Figures 1 to 8B The illustrated embodiments only show the shapes, sizes and arrangements of the various optional components of the ventilation unit and quick connector according to the present invention. However, they are only illustrative and not restrictive. Other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present invention. The technical content and technical features of the present invention have been disclosed above. However, it is understandable that, based on the creative ideas of the present invention, those skilled in the art may make various changes and improvements to the above-disclosed concepts, but they all fall within the scope of protection of the present invention. The description of the above embodiments is illustrative and not restrictive. The scope of protection of the present invention is determined by the claims.

Claims

1. A ventilation unit, characterized in that: The ventilation unit comprises: A housing, comprising a housing body having a vent hole and a rib extending from the housing body and surrounding the vent hole; a cover member having a central axis and comprising an end wall and a circumferential wall extending from the end wall, the cover member being adapted to engage the rib such that the end wall faces the vent hole and the circumferential wall surrounds the vent hole, In which, the circumferential wall includes a first wall segment and a second wall segment adjacent to each other in the circumferential direction of the cover member, the first wall segment and the second wall segment are separated from each other and the first wall segment is closer to the central axis of the cover member than the second wall segment, so as to form a first gap between the first wall segment and the second wall segment allowing fluid to flow along the circumferential direction, wherein the interior of the cover member is connected to the external fluid through the first gap.

2. The ventilation unit according to claim 1, characterized in that The circumferential wall is arranged to surround the entire vent hole.

3. The ventilation unit according to claim 1, characterized in that The circumferential wall includes a plurality of first wall segments and a plurality of second wall segments, and the first wall segments and the second wall segments are alternately arranged in the circumferential direction.

4. The ventilation unit according to claim 1, characterized in that The first wall section and the second wall section both extend substantially parallel to the central axis and have an arcuate cross section, wherein a radius of the arcuate cross section of the first wall section is smaller than a radius of the arcuate cross section of the second wall section.

5. The ventilation unit according to any one of claims 1 to 4, characterized in that The convex rib has a first limiting portion, and the cover member has a second limiting portion provided on the first wall segment. The first limiting portion is adapted to engage with the second limiting portion to prevent the cover member from being separated from the convex rib.

6. The ventilation unit according to any one of claims 1 to 4, characterized in that The cover member has a first protrusion protruding from the end wall toward the interior of the cover member, the first protrusion is suitable for abutting against the top of the convex rib, so that a second gap is formed between the end wall and the top of the convex rib, wherein the first gap is connected to the second gap.

7. The ventilation unit according to any one of claims 1 to 4, characterized in that The cover member has a second protrusion protruding from the second wall section toward the interior of the cover member, and the second protrusion is adapted to abut against a side of the convex rib facing away from the vent hole.

8. The ventilation unit according to any one of claims 1 to 4, characterized in that The ventilation unit includes a breathable membrane disposed on the outer surface of the shell body and covering the ventilation hole, and the free end surface of the circumferential wall is closer to the outer surface of the shell body than the top surface of the breathable membrane.

9. The ventilation unit according to claim 8, characterized in that The rib includes a plurality of rib segments that are spaced apart around the vent such that an opening is formed between adjacent rib segments.

10. The ventilation unit according to claim 9, characterized in that The shell body is provided with a groove recessed relative to the outer surface of the shell body. The groove is provided on the outer side of the convex rib away from the vent hole and is connected to the opening for discharging liquid at and / or near the breathable membrane.

11. The ventilation unit according to claim 10, characterized in that The channel includes a bottom wall and a first side wall and a second side wall located on opposite sides of the bottom wall, wherein at least one of the bottom wall, the first side wall and the second side wall has a slope to guide liquid entering the channel to be discharged along the channel.

12. The ventilation unit according to claim 9, characterized in that The rib section has a first limiting portion, and the cover member has a second limiting portion arranged on the first wall section, the first limiting portion is suitable for engaging with the second limiting portion to prevent the cover member from separating from the rib, the second limiting portion is in the form of a protrusion and extends from the first wall section toward the interior of the cover member, and the width of the second limiting portion is greater than the width of the opening.

13. A quick connector, characterized in that: The quick connector includes a connector body, a pressure sensor module installed in the connector body, and a ventilation unit according to any one of claims 1 to 12, wherein the ventilation unit is suitable for being installed to the connector body, and the ventilation unit and the connector body jointly define a pressure reference chamber for the pressure sensor module.

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