CN218552923U - Check valve and filter device - Google Patents

Check valve and filter device Download PDF

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Publication number
CN218552923U
CN218552923U CN202222553572.5U CN202222553572U CN218552923U CN 218552923 U CN218552923 U CN 218552923U CN 202222553572 U CN202222553572 U CN 202222553572U CN 218552923 U CN218552923 U CN 218552923U
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China
Prior art keywords
housing
diaphragm
way valve
tangential
septum
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CN202222553572.5U
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Chinese (zh)
Inventor
罗忠池
张军
黄海勇
徐小芳
张璇
顾俊
陈伟忠
唐丽娟
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Koninklijke Philips NV
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Koninklijke Philips NV
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Abstract

Embodiments of the present disclosure relate to a one-way valve and a filter device. A check valve, comprising: a housing adapted for fluid to pass through in a first direction; and a diaphragm disposed in a space in the housing, the diaphragm being attached to the housing; the housing includes a support arm extending in a radial direction, the support arm being provided with a projection extending in a second direction opposite to the first direction; alternatively, the septum is provided with a guide, wherein the guide is provided on at least one side of the septum. With embodiments of the present disclosure, the bending of the diaphragm is advantageously controlled to improve the fluid flow through the one-way valve to be stable in the first direction through the one-way valve.

Description

One-way valve and filter device
Technical Field
The present disclosure relates to the field of fluid filtration technology, and more particularly, to a check valve and a filtering apparatus using the same.
Background
Masks, and particularly active masks, have become increasingly popular for use in everyday personal protection to prevent contaminants, pathogens, allergens, etc. from entering the body via the nose and mouth of the wearer. An electronic module, such as a fan unit, is typically provided on the active mask to facilitate the venting of exhaust air exhaled by the wearer. By improving the manner in which exhaled exhaust gases are discharged, the active mask may promote wearer comfort. Generally, the lower the filtration resistance, the better the ventilation and the more comfortable the wearer will feel. The waste exhaled by the wearer is typically vented through a one-way valve provided on the mask. The diaphragm in the check valve may be bent only in response to the wearer's exhalation so that the exhaust gas may be smoothly discharged. Also, the diaphragm in the one-way valve generally maintains a static position without buckling when the wearer inhales, so that air inhaled by the wearer is adequately filtered by the filtering portion of the mask.
However, it can be observed that the bent diaphragm is likely to deform into two petals with large free areas, leaving the bent diaphragm too close to the package surface, leaving a small fluid passage for the fan. Particularly when one flap substantially coincides with the outlet of the fan where the suction is more concentrated, the excessively bent diaphragm adversely affects the fluid passage of the fan. The reduction in the passage will significantly reduce the suction and flow of the fan, thereby reducing the ventilation efficiency of the mask. Therefore, in order to use a membrane with good flexibility and ensure that it forms an adequate channel, it is necessary to eliminate the risk of the membrane deforming into two petals and bending excessively.
SUMMERY OF THE UTILITY MODEL
Embodiments of the present disclosure provide a one-way valve and filter arrangement to address, or at least partially address, the above and other potential problems of conventional solutions.
One aspect of the present disclosure provides a check valve including: a housing adapted for fluid to pass through in a first direction; and a diaphragm disposed in a space in the housing, the diaphragm being attached to the housing; the housing includes a support arm extending in a radial direction, the support arm being provided with a projection extending in a second direction opposite to the first direction; alternatively, the septum is provided with a guide, wherein the guide is provided on at least one side of the septum.
In accordance with one or more embodiments, the housing comprises: a first housing adapted for fluid to pass through in a first direction; a second housing offset from and connected to the first housing in a first direction, the second housing adapted to be traversed by a fluid in the first direction and comprising first support arms extending in a radial direction; and wherein the diaphragm is disposed between the first housing and the second housing.
According to one or more embodiments, the diaphragm includes a central region and a peripheral region, the diaphragm being attached to the first housing through the central region.
According to one or more embodiments, the first support arm includes a protrusion at a position adjacent to an outer edge of the second housing, the protrusion extending in a second direction opposite to the first direction.
According to one or more embodiments, the guide is a radial guide, the septum comprises a central region and a peripheral region, the peripheral region comprising a plurality of radial guides; alternatively, the guide is a tangential guide, the septum includes a central region and a peripheral region, the peripheral region including a plurality of tangential guides.
According to one or more embodiments, the protrusion of the first support arm abuts at least part of the septum.
According to one or more embodiments, the tangential guide comprises a tangential groove or a tangential protrusion, and/or the tangential guide is linear or curved in shape; alternatively, the radial guide comprises a radial projection.
According to one or more embodiments, the number of the first supporting arms is at least three, and the azimuth angle interval angles among the supporting arms are not equal; wherein the azimuthal separation angle towards the fluid passage cooperating with the one-way valve is greater than the other azimuthal separation angles.
According to one or more embodiments, the second housing further comprises a second support arm extending in a radial direction from a center of the second housing to an outer edge of the second housing.
According to one or more embodiments, the azimuthal interval angles between the plurality of radial guides are not equal; wherein the azimuthal separation angle towards the fluid passage in cooperation with the one-way valve is greater than the other azimuthal separation angles.
According to one or more embodiments, the lengths of the plurality of tangential guides are not equal to each other; wherein the tangential guide towards the fluid passage cooperating with the non-return valve is longer than the other tangential guides.
Another aspect of the present disclosure provides a filter device including: a fan comprising a fluid inlet; and a one-way valve according to one or more embodiments described above, the housing of the one-way valve being connected to the fluid inlet; wherein the one-way valve is configured to control bending of a diaphragm in the one-way valve when fluid flows between the fluid inlet and the one-way valve.
With embodiments of the present disclosure, the bending of the diaphragm is advantageously controlled to improve the fluid flow through the one-way valve to be stable in the first direction through the one-way valve.
Drawings
The above and other objects, features and advantages of the embodiments of the present disclosure will become more readily understood through the following detailed description with reference to the accompanying drawings. Various embodiments of the present disclosure will be described by way of example and not limitation in the accompanying drawings, in which:
FIG. 1A illustrates a plan view of a first housing in a one-way valve according to an exemplary embodiment of the present disclosure;
FIG. 1B illustrates a cross-sectional view of the first housing in the check valve shown in FIG. 1A;
FIG. 2A illustrates a plan view of a second housing in a check valve according to an exemplary embodiment of the present disclosure;
FIG. 2B illustrates a cross-sectional view of a second housing in the check valve shown in FIG. 2A;
FIG. 3A illustrates a plan view of a diaphragm in a one-way valve according to an exemplary embodiment of the present disclosure;
FIG. 3B shows a cross-sectional view of a diaphragm in the one-way valve according to FIG. 3A;
FIG. 4A illustrates a plan view of a diaphragm in a one-way valve according to an alternative embodiment of the present disclosure;
FIG. 4B shows a cross-sectional view of the diaphragm in the check valve according to FIG. 4A;
FIG. 5A illustrates a plan view of a diaphragm in a one-way valve according to an alternative embodiment of the present disclosure; and
figure 5B shows a cross-sectional view of the diaphragm in the one-way valve according to figure 5A.
Detailed Description
Corresponding numerals and symbols in the various drawings generally refer to corresponding regions unless otherwise indicated.
The drawings are drawn for clarity of illustration of relevant aspects of embodiments and are not necessarily to scale.
The edges of a feature drawn in the drawings do not necessarily represent the end of the range of the feature.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of various examples of embodiments according to the description. Embodiments may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to not obscure aspects of the embodiments.
Reference to "an embodiment" or "one embodiment" within the framework of the specification is intended to indicate that a particular configuration, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, phrases such as "in an embodiment," "in one embodiment," and the like that may be present in various points of the specification do not necessarily refer to the same embodiment with certainty. Furthermore, the particular configurations, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The headings/reference signs used herein are provided for convenience only and thus do not limit the scope of the protection or the scope of the embodiments. The same or similar elements are identified with the same reference numerals.
As mentioned above, face masks are now increasingly used for personal health protection, and an electronic module such as a fan unit is typically provided on the active face mask to facilitate the venting of exhaust air exhaled by the wearer.
In most cases, the one-way valves used in masks are closed on inhalation and open on exhalation (of course, the one-way valves may also be open on inhalation and closed on exhalation). Especially in the active mask, the one-way valve can be matched with the fan, so that the breathing resistance is greatly reduced while the filtering performance is ensured.
One-way valves used in masks typically include a diaphragm that effects switching of the one-way valve from closed to open by flexing from a rest position in response to the flow of gas. However, it has been observed that in the prior solutions, the diaphragm may be excessively bent during the opening and closing of the non-return valve, which may reduce the fluid passage area of the fan for the active mask. However, the above-mentioned problem does not arise when the diaphragm is deformed into 3 or more petals, because for the same diaphragm, the deformation into more petals causes the respective free area of each petal formed to be smaller and thus cannot be bent too close to the fluid inlet of the fan. Accordingly, the present disclosure improves upon the one-way valve of the mask, either alone or in addition, to balance the above factors.
Embodiments in accordance with the present disclosure provide a one-way valve to address, or at least partially address, the above or other potential problems of conventional approaches.
The structure of the check valve according to an exemplary embodiment of the present disclosure will be described in detail below with reference to fig. 1A to 5B. In general, the one-way valve described herein comprises a housing and a diaphragm 5. The housing may include a first housing 1 and a second housing 3. In some embodiments, the first housing 1 may be an inner housing proximate to the face of the wearer and the second housing 3 may be an outer housing proximate to the external environment. The diaphragm 5 may be disposed in a space inside the housing formed by the first housing 1 and the second housing 3. That is, the diaphragm 5 is disposed, for example, between the first housing 1 and the second housing 3. And the membrane 5 may bend in response to a flow of air through the first and second housings 1, 3 in a first direction 13, wherein the first direction 13 is for example directed away from the face of the wearer. The first housing 1, the second housing 3 and the diaphragm 5 are detachably joined to form a check valve.
It will be appreciated that in some embodiments the first housing 1 and the second housing 3 may also integrally form the housing of the one-way valve. For example, the first casing 1 and the second casing 3 are an inner portion close to the wearer's face and an outer portion close to the external environment, respectively.
Fig. 1A and 1B show a plan view and a sectional view, respectively, of a first housing 1 of a check valve according to an embodiment of the present disclosure. To better fit the fluid inlet of the fan, the first housing 1 may in some embodiments be circular, for example. It is to be understood, however, that this is merely exemplary, and that the first housing 1 may be any other shape, such as oval, polygonal, etc., and the scope of the present disclosure is not limited thereto.
As shown in fig. 1A and 1B, the first casing 1 includes a plurality of support arms 11. The support arms 11 may extend radially from the central portion 17 of the first housing 1 to an outer edge 19 of the first housing. As shown in fig. 1A, the plurality of support arms 11 are angularly spaced apart from each other, and thereby a plurality of openings 15 are formed on the first housing 1. The first housing 1 is adapted to be passed by a fluid (e.g., air) through the openings 15 between the plurality of support arms 11 in a first direction 13 as shown in fig. 1B. It is noted that although an embodiment including three support arms 11 is shown in fig. 1A, the scope of the present disclosure is not limited thereto. In other alternative embodiments, the first housing 1 may comprise more than three support arms 11. For example, in alternative embodiments, the first housing 1 may include four support arms 11, five support arms 11, or more support arms 11. Further, the azimuthal interval angles between the respective support arms 11 of the first casing 1 do not have to be completely equal.
In some embodiments, the first housing 1 may be detachably mated with the second housing 3 via the central portion 17 and/or the outer rim 19 to enable assembly of the one-way valve.
Fig. 2A and 2B show a plan view and a sectional view, respectively, of the second housing 3 of the check valve according to an embodiment of the present disclosure. Referring to fig. 1A and 1B in combination, the second housing 3 is offset from the first housing 1 in the first direction 13, thereby forming a space between the first housing 1 and the second housing 3 that allows the diaphragm 5 to be bent therebetween. For better coupling with the fluid inlet of the fan and with the first housing 1, the shape of the second housing 3 may in some embodiments correspond to the first housing 1.
In some embodiments, as shown in fig. 2A, the second housing 3 may include at least three support arms 31 similar to the support arms 11 of the first housing 1. The support arms 31 extend radially, for example from a central portion 37 of the second housing 3 to an outer edge 39 of the second housing. As shown in fig. 2A, at least three support arms 31 are angularly spaced apart from each other, and thereby a plurality of openings 34 are formed on the second housing 3. The support arms 31 of the second housing 3 may be arranged to be aligned or misaligned with the support arms 11 of the first housing 1 as required. In some embodiments, the second housing 3 is adapted to be traversed by a fluid (e.g., air) in the first direction 13 shown in fig. 1B through the openings 34 between the at least three support arms 31. It is noted that although an embodiment including three support arms 31 is shown in fig. 2A, the scope of the present disclosure is not limited thereto. In other alternative embodiments, the second housing 3 may comprise more than three support arms 31. For example, in some embodiments, the second housing 3 may include four, five, or more support arms 31. Further, the azimuthal interval angles between the respective support arms 31 of the second housing 3 do not have to be completely equal. For example, the azimuthal separation angle of the fluid inlet towards the fan may be greater than the other azimuthal separation angles.
As shown in fig. 2A and 2B, each support arm 31 of the second housing 3 is provided with a projection 33 at a position adjacent to an outer edge 39 of the second housing 3. The projection 33 extends in a second direction 32 towards the first housing 1, wherein the second direction 32 is opposite to the first direction 13.
In some embodiments, as shown in fig. 2A, the second housing 3 may further comprise an additional plurality of support arms 35 to provide additional mechanical strength to the second housing 3. The support arms 35 extend radially from a central portion 37 of the second housing 3 to an outer edge 39 of the second housing 3. In the embodiment shown in fig. 2A, no protrusions may be included on the support arms 35. In other embodiments, some of the support arms 35 may also include protrusions thereon. Embodiments of the present disclosure are not particularly limited in this regard.
In some embodiments, the second housing 3 mates with the central portion 17 of the first housing 1 through the central portion 37 and the diaphragm 5 is disposed between the first housing 1 and the second housing 3.
As described above, in some embodiments, the support arms 31 of the second housing 3 may not be equally spaced, i.e., the azimuthal spacing angles between the support arms 31 are not equal, which results in the projections 33 on the support arms 31 not being equally spaced. In this case, the azimuthal interval angle between the respective two adjacent protrusions 33 toward the fluid inlet of the mask fan may be advantageously set larger than the azimuthal interval angle between the other protrusions 33. Thus, when the diaphragm 5 is flexed in response to the flow of fluid in the first direction 13, the petals formed in the peripheral region 53 of the fluid inlet towards the fan may be larger than the other petals, thereby making the fluid more likely to flow towards the fan.
In some embodiments, the support arms, the central portion and the outer edge of the first and second housings 1, 3 may be arranged as small as possible (e.g. smaller than a predetermined threshold dimension), in particular a dimension in a plane perpendicular to the first direction 13 or the second direction 32. In this way, the resistance to the passage of fluid can be reduced as much as possible.
Fig. 3A to 3B illustrate a plan view and a sectional view of a diaphragm 5 for a check valve according to an embodiment of the present disclosure, respectively.
The diaphragm 5 is disposed in an inner space formed by the first case 1 and the second case 3. As shown in fig. 3A and 3B, the diaphragm 5 includes a central region 51 and a peripheral region 53. The diaphragm 5 is attached to the central portion 17 of the first housing 1 at a central region 51, and a peripheral region 53 of the diaphragm 5 is free to flex in response to the flow of fluid.
In some embodiments, the projections 33 of the at least three support arms 31 of the second housing 3 abut at least portions of the peripheral region 53 of the diaphragm 5 when the diaphragm 5 is bent. In other embodiments, the protrusion 33 may also abut at least a portion of the peripheral region 53 of the septum 5 when the septum 5 is not bent.
In some embodiments, the membrane 5 is used as an airtight membrane in a one-way valve when in the rest position, which prevents fluid (e.g. air) from passing through the one-way valve in the second direction 32 by covering the openings 15 between the support arms 11 of the first housing 1. When fluid flows in the one-way valve in the first direction 13, the peripheral region 53 of the diaphragm 5 is bent in the first direction 13 toward the second housing 3 in response to the flow of fluid (e.g., air) in the first direction 13, thereby allowing the fluid to smoothly pass through the one-way valve. Due to the presence of the protruding portion 33 of the second housing 3, the bending of the diaphragm 5 is restricted by the protruding portion 33. In other words, the degree of bending of the diaphragm 5 is small at the position abutted by the protruding portion 33. In a further embodiment, the diaphragm 5 may not be bent at the position abutted by the protrusion 33. Therefore, the height of the protrusion 33 extending from the support arm 31 in the second direction 32 can be flexibly adjusted as needed, thereby flexibly adjusting the degree of limitation of the bending of the diaphragm 5, thereby adapting the check valve to various use scenarios of different wearers.
In one or more embodiments, the bent septum 5 tends to form at least three petals with at least three protrusions 33 abutting the septum 5. In this case, by forming a plurality of smaller petals instead of two larger petals, the folded diaphragm 5 does not excessively fold while allowing the fluid to smoothly pass through the check valve, and thus does not affect the effective passage area of the fluid inlet of the fan.
In the embodiment shown in fig. 3A, the peripheral region 53 of the septum 5 may include a plurality (e.g., at least three) radially extending radial guides 55. As shown in fig. 3A, the plurality of radial guides 55 are angularly spaced apart from each other by an azimuthal interval.
As shown in fig. 3B, a radial guide 55 may be provided on at least one side of the septum 5 and protrude from the surface of the septum 5. In other words, the radial guide 55 is a radial thickening on at least one side of the diaphragm 5, at which position the area moment of inertia of the diaphragm 5 is increased. Thus, the radial guides 55 increase the bending resistance of the septum 5 at the respective positions of the septum 5, whereby the septum 5 is less likely to bend at the radial guides 55. When the septum 5 bends in response to the flow of fluid in the first direction 13, the septum 5 bends to a greater extent in the scalloped areas formed between adjacent radial guides 55 because the radial guides 55 of the septum 5 are less likely to bend. In other words, the degree of bending of the diaphragm 5 is small at the position where the radial guide 55 is provided. In a further embodiment, the septum 5 may also be unbent where the radial guide 55 is provided. Thus, providing at least three radial guides 55 on the septum 5 causes the crimped septum 5 to tend to form at least three petals. In this case, the diaphragm 5 does not excessively bend while allowing the fluid to smoothly pass through the check valve, and thus it is possible to avoid a wearer's wearing experience from being deteriorated due to a reduction in the effective passage area of the fluid inlet of the fan.
In some embodiments, the radial guides 55 may be aligned with the support arms 31 of the second housing 3. In this case, the projections 33 of the support arms 31 abut the radial guides 55 of the septum 5 in order to limit, by co-action with the radial guides 55, the bending of the septum 5 in the first direction 13 towards the second housing 3 at the location of the radial guides 55.
The radial guides 55 may be formed, for example, by depositing the same or different material on the septum 5 as the septum 5, integrally formed with the septum 5 when the septum 5 is manufactured, or by any of a variety of means known in the art. Further, the dimensions (e.g., width, height, length, cross-sectional shape, etc.) of the radial guides 55 can be flexibly adjusted as necessary, so that the local area moment of inertia of the peripheral region 53 of the diaphragm 5 can be adjusted as necessary. That is, in one or more embodiments, by flexibly adjusting the size and shape of the radial guide 55, the degree of bending and shape of the diaphragm can be controlled, thereby adjusting the fluid passage area for the fan formed by the bent diaphragm 5.
For example, in some embodiments, the septum 5 may include at least three radial guides 55. In some embodiments, the septum 5 may include four, five, or more radial guides 55. Thus, in one or more embodiments, the number of petals formed by the folded septum 5 can be controlled by flexibly adjusting the number of radial guides 55.
Still further, in one or more embodiments, the azimuthal spacing angle between adjacent radial guides 55 may be the same or different. For example, the azimuthal spacing angle between adjacent radial guides 55 towards the fluid inlet of the fan may be greater than the azimuthal spacing angle between other adjacent radial guides. It is thereby possible to provide a larger fluid passage area to the fluid inlet of the fan and at the same time prevent excessive bending of the diaphragm 5 by forming at least three petals.
Fig. 4A and 4B show a plan view and a cross-sectional view, respectively, of a diaphragm 5 for a one-way valve according to an alternative embodiment of the present disclosure. Features already described above in connection with fig. 3A and 3B will not be repeated and will only be discussed in detail below with respect to features different from those shown in fig. 3A and 3B.
The septum 5 shown in figures 4A and 4B differs from the septum 5 described above with respect to figures 3A and 3B in that the peripheral region 53 of the septum 5 shown in figures 4A and 4B includes a plurality of tangential guides 57 rather than a plurality of radial guides 55. By providing different forms of guide, the septum 5 can be adapted to different design requirements.
As shown in fig. 4A, in some embodiments, the peripheral region 53 of the septum 5 may include a plurality of tangential guides 57. As shown in fig. 4A, a plurality of tangential guides 57 are provided in the peripheral region 53 at positions adjacent to the central region 51, and are angularly spaced from each other by an azimuthal spacing angle. For example, in some embodiments, the septum 5 may include at least three tangential guides 57. In some embodiments, septum 5 may include four, five, or more tangential guides 57.
As shown in fig. 4B, in some embodiments, the tangential guide 57 is disposed on at least one side of the septum 5 and is recessed from the surface of the septum 5. In other words, the tangential guide 57 is a tangential thinning on at least one side of the septum 5 where the area moment of inertia of the septum 5 is reduced. Thus, the tangential guides 57 weaken the bending resistance of the septum 5 at the respective positions of the septum 5, whereby the septum 5 is more easily bent at the tangential guides 57. When the diaphragm 5 is bent in response to the flow of the fluid in the first direction 13, since the diaphragm 5 is easily bent at the tangential guide 57, the diaphragm 5 tends to be more bent with the tangential guide 57 as a bending line, and thus a plurality of petals are formed. In other words, since the septum 5 is more easily bent at the tangential guides 57, the bent septum 5 tends to form at least three petals by providing at least three tangential guides 57 on the septum 5. In this case, the diaphragm 5 does not excessively bend while allowing the fluid to smoothly pass through the check valve, and thus does not affect the effective passage area of the fluid inlet of the fan.
In some embodiments, the tangential guide 57 may be formed, for example, by making a cut in the septum 5, or by any of a variety of means known in the art.
Although the tangential guide 57 illustrated in fig. 4A is rectangular in shape, the scope of the present disclosure is not limited thereto. For example, the tangential guide 57 may also be curved or any other shape.
Further, while the tangential guides 57 shown in fig. 4B are recesses, in some embodiments, the tangential guides 57 may also be bumps. In this case, the tangential guide 57 may be formed in a manner similar to that discussed above with respect to the radial guide 55. Of course, it should be understood that the dimensions of the plurality of tangential guides 57 may be the same or different from one another, thereby allowing for flexible adjustment of the degree of bending of the sector of the peripheral region 53 to which each tangential guide 57 corresponds, so as to flexibly control the size of the respective flap formed. For example, the tangential guide 57 toward the fluid inlet that mates with the one-way valve may have a longer length than the other tangential guides 57. In this case, the sector facing the fluid inlet when the diaphragm 5 is bent may form a larger flap than the other sectors.
For example, in some embodiments, the septum 5 may include at least three tangential guides 57. In some embodiments, septum 5 may include four or more tangential guides 57. Thus, in one or more embodiments, the number of petals formed by the folded septum 5 can be controlled by flexibly adjusting the number of tangential guides 57.
Fig. 5A and 5B show a plan view and a cross-sectional view, respectively, of a diaphragm 5 for a one-way valve according to an alternative embodiment of the present disclosure. It can be seen that the septum 5 shown in figures 5A and 5B includes a radial guide 55 and a tangential guide 57 as shown in figures 3A-4B.
As described above, the septum 5 is not easily bent at the position of the radial guide 55, and the septum 5 is easily bent along the tangential guide 57. Thus, in response to the flow of fluid in the first direction 13, the septum 5 shown in FIG. 5A is adapted to bend along the tangential guides 57 between adjacent radial guides 55, thereby forming three petals. Of course, it will be understood that the septum 5 may also include more than three radial guides 55 and tangential guides 57. For example, the septum 5 may include four radial guides 55 and four tangential guides 57. In this case, the diaphragm 5 will form four corresponding petals when flexed in response to the flow of fluid in the first direction 13.
According to an embodiment of the present disclosure, a filter device is also provided. The filtering device may include a filtering portion, a fan, and a check valve.
In some embodiments, the fan may include a fluid inlet for the fan to direct the flow of the airflow. In some alternative embodiments, the fan may be a centrifugal fan. Of course any other type of fan may be used according to specific needs.
In some embodiments, the one-way valve may be a one-way valve as in any of the embodiments described above. The one-way valve is connected to the fan by a fan locating feature provided on the second housing 3 and to the filter part by the outer rim 19 of the first housing 1 and the outer rim 39 of the second housing 3, thereby forming a filter device according to one or more embodiments.
Without prejudice to the underlying principles, the details and the embodiments may vary, even significantly, with respect to what has been described above purely by way of example, without departing from the scope of protection.
The claims are an integral part of the technical teaching provided herein with reference to the examples.
The scope of protection is determined by the appended claims.

Claims (12)

1. A one-way valve, comprising:
a housing adapted for the passage of a fluid in a first direction (13); and
a membrane (5) disposed in a space in the housing, the membrane being attached to the housing;
the housing comprises a support arm extending in a radial direction, the support arm being provided with a protrusion (33), the protrusion (33) extending in a second direction (32) opposite to the first direction (13); and/or
The septum (5) is provided with a guide, wherein the guide is provided on at least one side of the septum (5).
2. The one-way valve of claim 1, wherein the housing comprises:
a first casing (1) suitable for the passage of a fluid along said first direction (13);
-a second casing (3) offset from the first casing (1) in the first direction (13) and connected to the first casing (1), the second casing (3) being adapted to be crossed by the fluid in the first direction (13) and comprising first support arms (31) extending in a radial direction; and
wherein the diaphragm (5) is arranged between the first housing (1) and the second housing (3).
3. A one-way valve according to claim 2, wherein the diaphragm (5) comprises a central region (51) and a peripheral region (53), the diaphragm (5) being attached to the first housing (1) by the central region (51).
4. A non-return valve according to claim 2, characterised in that the first support arm (31) comprises a projection (33) adjacent an outer edge (39) of the second housing (3), the projection (33) extending in a second direction (32) opposite the first direction (13).
5. A check valve as claimed in any one of claims 1 to 4, wherein the guides are radial guides (55), the diaphragm (5) comprising a central region (51) and a peripheral region (53), the peripheral region (53) comprising a plurality of radial guides (55); and/or
The guide is a tangential guide (57), the septum (5) comprises a central region (51) and a peripheral region (53), the peripheral region (53) comprising a plurality of tangential guides (57).
6. The non-return valve according to claim 4, characterized in that the projection (33) of the first support arm (31) abuts at least part of the diaphragm (5).
7. The non-return valve according to claim 5, characterized in that the tangential guide (57) comprises a tangential groove or a tangential projection, and/or in that the tangential guide (57) is rectilinear or curvilinear in shape;
alternatively, the radial guide (55) comprises a radial projection.
8. A check valve according to any of claims 2-4, wherein the number of the first support arms (31) is at least three and the azimuthal spacing angle between the support arms (31) is not equal;
wherein the azimuthal separation angle towards the fluid passage with which the one-way valve is mated is greater than the other azimuthal separation angles.
9. The non-return valve according to claim 4, characterized in that the second housing (3) further comprises a second support arm (35), the second support arm (35) extending in a radial direction from the center of the second housing (3) to the outer edge (39) of the second housing.
10. The non-return valve according to claim 5, characterized in that the azimuthal spacing angles between the plurality of radial guides (55) are not equal;
wherein the azimuthal separation angle towards the fluid passage with which the one-way valve is mated is greater than the other azimuthal separation angles.
11. The non-return valve according to claim 5, characterized in that the lengths of the plurality of tangential guides (57) are not equal to each other;
wherein the tangential guide (57) towards the fluid passage cooperating with the non-return valve is longer than the other tangential guides (57).
12. A filter device, comprising:
a fan comprising a fluid inlet; and
a one way valve according to any one of claims 1 to 11, having a housing connected to the fluid inlet;
wherein the one-way valve is configured to control bending of a diaphragm in the one-way valve when fluid flows between the fluid inlet and the one-way valve.
CN202222553572.5U 2022-09-26 2022-09-26 Check valve and filter device Active CN218552923U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI849876B (en) 2023-05-02 2024-07-21 陳忠勇 Sports Mask

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI849876B (en) 2023-05-02 2024-07-21 陳忠勇 Sports Mask

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