KR102438981B1 - Pre-filter holder for air dryer cartridge in commercial vehicle and air dryer cartridge including the same - Google Patents

Abstract

The present invention relates to a pre-filter holder, which can be applied to an air dryer cartridge for a commercial vehicle, wherein the cartridge is capable of multi-stage filtering, and an air dryer cartridge using the pre-filter holder. More specifically, the pre-filter holder capable of providing predetermined compression force while restraining a housing between the housing and a pre-filter is disclosed, thereby improving durability and a filtering effect of the air dryer cartridge.

Description

Pre-filter holder of air dryer cartridge for commercial vehicle and air dryer cartridge including same

The present invention is used for a dryer cartridge applied to a compressed air treatment system, and more particularly, to an apparatus for supporting a pre-filter of a filter cartridge applied to an air dryer of a compressed air treatment system for commercial vehicles.

In a commercial vehicle, various actuation systems using pneumatic pressure are provided to control the operation of a large and heavy commercial vehicle. Examples of such pneumatic systems include a service brake system, a pneumatic suspension system, a parking brake system, and the like. To drive these pneumatic systems, high-pressure compressed air is required, which is generated through a compressor driven by an engine or drive motor and then delivered to the reservoirs of the respective compressed air-consuming systems.

On the other hand, the compressed air supplied through the compressor contains foreign substances including oil and moisture. Foreign substances such as oil and moisture in the compressed air may cause a malfunction of the pneumatic system or adversely affect the system, such as lowering durability. do.

Accordingly, in a system for generating and supplying compressed air, a dryer unit including a filter cartridge is provided to filter out foreign substances such as oil in the generated compressed air and to absorb moisture to make dry air.

1 shows an example of a compressed air treatment system in which a conventional dryer unit is installed.

As shown in FIG. 1 , the high-pressure compressed air generated by the compressor 10 passes through the dryer unit 20 to remove oil and moisture. In particular, the compressed air introduced into the dryer unit 20 is processed while passing through the filter cartridge 21 , and the processed compressed air is supplied to each consumption circuit through the valve assembly 22 .

On the other hand, when the desiccant in the dryer unit does not exhibit sufficient dehumidification performance, such as reaching a saturated state, a regeneration process for returning the dry compressed air to the dryer unit to recover the dehumidifying agent performance may be performed, in this case, the compressed air flow Silver tends to flow in the opposite direction to that of supply.

In a compressed air treatment system, oil and carbon black particles introduced into the compressed air from the compressor during the compression process as well as contaminant particles already contained in the intake air are removed from the compressed air, and moisture present in the compressed air is removed. For this purpose, compressed air treatment systems for commercial vehicles are generally provided with air dryer cartridges that can dehumidify compressed air and preferably also absorb oil and contaminant particles.

In this regard, Korean Patent Laid-Open No. 10-2018-0118715 shows an example of a conventional filter cartridge.

In the conventional dryer unit, the desiccant is accommodated in the cartridge to secure the dehumidifying performance, and an oil adsorption filter is installed near the inlet of the compressed air to remove oil. The oil adsorption filter is installed in the housing of the filter cartridge, and may be installed upstream before compressed air is introduced into the desiccant inside the housing. Therefore, since the purified air, which has been previously filtered out oil and the like by the oil adsorption filter, passes through the desiccant, it is possible to prevent oil contamination of the desiccant.

When manufacturing the oil absorption filter, a wrapping material formed of a porous material, a nonwoven material, etc. may be used, and an oil absorption filter of a certain thickness may be manufactured while the wrapping material is wound on the inner wall of the housing.

On the other hand, in the case of the oil adsorption filter fixed inside the housing by a method such as wrapping, there is a risk of being separated by an impact as the compressed air treatment process is repeatedly performed. In particular, in the case of a compressed air processing apparatus for a commercial vehicle, high-pressure compressed air flows through the filter cartridge, and in this process, a problem in which the oil absorption filter is damaged may occur due to the separation of the wrapped oil absorption paper. In addition, due to the separation of the sorbent paper, cracks may occur in the internal structure of the sorbent filter, which may cause a problem in that the filtering performance of the sorbent filter is deteriorated.

Korea Patent Publication No. 10-2018-0118715 (2018. 10. 31.)

The present invention has been devised to solve the above problems, and in the present invention, it is possible to effectively fix and support the pre-filter to prevent separation or damage of the pre-filter that primarily filters oil and foreign substances contained in compressed air. An object of the present invention is to provide a filter holder for an air dryer cartridge for commercial vehicles.

In particular, in the present invention, when the high-pressure compressed air is discharged through the desiccant during regeneration, the air dryer cartridge with improved durability is configured to effectively prevent the oil sorbent from leaving the housing inner side by the high-pressure compressed air. Its purpose is to provide

In addition, another object of the present invention is to prevent the flow path inside the housing from being blocked due to an impact, and to prevent the housing from being damaged by an external force.

In addition, another object of the present invention is to improve the filtering effect of the pre-filter by minimizing the reduction in the supply and regeneration efficiency of compressed air, and by applying a constant initial pressure to the pre-filter.

In addition, it is another object of the present invention to provide a filter holder for an air dryer cartridge that is easy to manufacture with a structure that is easy to assemble.

In order to achieve the above object, in a preferred embodiment of the present invention, as a pre-filter holder for supporting a pre-filter installed in a commercial vehicle air dryer cartridge, the pre-filter holder is made by assembling two or more filter holding elements, The filter holding element may include: an arc-shaped frame formed to support while enclosing a portion of an outer circumferential surface of the pre-filter; a pressure socket formed at one end of the arc-shaped frame; and a fastening ring capable of being fastened to the pressure socket; provides a pre-filter holder comprising a.

The pressing socket may include a pressing piece and a fastening groove.

The pressing piece may have a plate shape bent outward to form a contact surface with the housing on the outermost portion, and the fastening groove may be a groove formed by a reinforcing member supporting the pressing piece while vertically extending vertically of the pressing piece.

The fastening ring may include a clasp having an inclined surface to be introduced into the fastening groove to be fixed.

A fastening ring of each filter holding element may be coupled to a fastening groove of an adjacent filter holding element, and the pre-filter holder to which each filter holding element is coupled may have a ring shape.

The two or more filter holding elements may all have the same structure, and each filter holding element may be configured to support the pre-filter in the same area.

The pre-filter holder has an annular structure in which the first filter holding element and the second filter holding element are fastened to each other, and the arc-shaped frame of the first filter holding element covers a larger area than the arc-shaped frame of the second filter holding element can be configured to do so.

Each of the filter holding elements may further include one or more pressing members formed to protrude between the fastening rings formed at both ends of each filter holding element and the pressing socket.

The arc-shaped frame includes: a pair of main horizontal frames arranged vertically; and a pair of main vertical frames connecting the main horizontal frames.

The main horizontal frames may be connected by a plurality of first auxiliary supports formed perpendicular to the main horizontal frames, and a plurality of openings may be formed between the first auxiliary supports.

One or more second auxiliary supports extending in a horizontal direction may be formed between the main vertical frames extending in the vertical direction and at least some of the first auxiliary supports.

The pressing member may be formed between the first auxiliary supports not connected by the second auxiliary support.

In addition, according to a preferred embodiment of the present invention, there is provided an air dryer cartridge in which the pre-filter installed on the cartridge container in which the desiccant is accommodated is supported by the pre-filter holder.

The pre-filter holder is inserted into the housing in a state of being temporarily assembled on the outside of the pre-filter to fix the pre-filter, and the pre-filter can be fixed as the pre-filter holder is pressed by the inner wall of the housing.

A gap for moving compressed air is formed between the outer circumferential surface of the cartridge container and the inner wall of the housing, and a collision member is installed in the gap, so that air moving through the gap collides with the collision member to filter oil. have.

According to the present invention, by the pre-filter fixed and supported by the filter holder, it is possible to prevent separation or damage to the oil adsorption paper constituting the pre-filter, so that the oil removal performance of the pre-filter can be continuously maintained. There is an effect that the durability of the filter cartridge is improved by effectively preventing oil and the like from flowing into the desiccant.

In addition, according to the present invention, there is an effect of improving the filtering effect of the pre-filter by minimizing the reduction in the supply and regeneration efficiency of the compressed air, and by applying a predetermined initial pressure to the pre-filter.

In particular, according to the present invention, it is possible to prevent the flow path inside the housing from being blocked as the pre-filter is damaged and separated due to the impact of compressed air, and it is possible to prevent the housing from being damaged by the external force acting on the housing. .

In addition, the pre-filter holder according to a preferred embodiment of the present invention has a structure in which a plurality of holder parts are inserted and assembled while seated around the pre-filter. There are advantages.

1 shows an example of a compressed air treatment system in which a conventional dryer unit is installed.
2 is a cross-sectional view of a cartridge for a dryer in which a pre-filter holder according to a preferred embodiment of the present invention is installed.
3 is a conceptual view illustrating a structure in which the pre-filter holder fixes and supports the pre-filter inside the housing in the cartridge for the dryer of FIG. 2 .
4 is a pre-filter holder according to a preferred embodiment of the present invention, showing an example of the pre-filter holder assembled by two holding members,
5 illustrates a holding member constituting the pre-filter holder of FIG. 4 .

The embodiments described below are only for explaining in detail enough that those of ordinary skill in the art to which the present invention pertains can easily carry out the invention, which does not mean that the protection scope of the present invention is limited. does not Accordingly, substitutions or changes may be made to some components without departing from the essential scope of the present invention.

In the following description, when a part is 'connected' to another part, it includes not only a case in which it is directly connected, but also a case in which another element or device is interposed therebetween. In addition, when a part 'includes' a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

The air dryer cartridge described in this specification, like the cartridge for a conventional dryer, is configured to remove oil in the compressed air, dry the compressed air and supply it in one direction, on the other hand, compressed air for cartridge regeneration under certain conditions. It means that it is configured so that it can carry out the process of flowing in the opposite direction and then venting it to the atmosphere.

To this end, the air dryer cartridge according to the present invention is also configured to include an inlet port through which the compressed air is introduced and an outlet port through which the compressed air is discharged. It is a concept that is relatively determined according to the operating state, and is related to the flow direction of compressed air. However, in this specification, for convenience of explanation, 'inflow' and 'outflow' are defined based on the state in which compressed air is supplied, that is, the air generated by the compressor flows into the air dryer cartridge and then flows out to the valve assembly side. Explain. For reference, since the air flow in the opposite direction is shown inside the cartridge during regeneration, those of ordinary skill in the art know that 'inflow' and 'outflow' are opposite to those of compressed air supply. If so, you will be able to understand.

In addition, in the present specification, compressed air being 'treated' means that the compressed air passes through the filter cartridge, while oil, moisture, and foreign substances in the compressed air are filtered. In addition, in this specification, compressed air being 'regenerated' means that the moisture in the desiccant inside the cartridge is removed by the purified compressed air flowing into the filter cartridge through a compressed air storage means such as an internal storage for the main brake. It refers to the process of venting air to the outside.

Hereinafter, a pre-filter holder and an air dryer cartridge including the same according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional view of a cartridge for a dryer in which a pre-filter holder according to a preferred embodiment of the present invention is installed.

3 is a conceptual view illustrating a structure in which the pre-filter holder fixes and supports the pre-filter inside the housing in the cartridge for the dryer of FIG. 2 .

The air dryer cartridge 100 according to a preferred embodiment of the present invention is formed substantially rotationally symmetrical with respect to a central axis in the vertical direction, and the cartridge container unit 120 in which the desiccant 170 is filled in the generally cylindrical housing 110 . ) has a stored form. As shown in FIG. 2 , the cylindrical housing 110 has a structure having an open surface with one open end, and the opposite end has a closed shape. For example, the housing 110 may have a cup shape manufactured by deep drawing a thin metal plate.

A cartridge container unit 120 filled with a desiccant 170 is positioned inside the housing 110 . The desiccant 170 filled in the cartridge container unit 120 may be a desiccant of powder having a dehumidifying function, such as zeolite, or a structure impregnated with the desiccant. The desiccant is filled in the inner space of the cartridge container unit 120, and the density of the desiccant can be sufficiently increased as the cartridge container unit 120 is pressed by the spring member 150 at the top.

In the case of the example of Figure 2, the spring member 150 is located at the upper end of the housing 110, it is an example of a top-down structure for pressing the cartridge container unit 120 downward. On the other hand, the spring member may be in the form of a bottom-up structure located on the lower side of the housing, and in the present invention, the pre-filter holder 180 may be installed regardless of the position of the spring member.

The cartridge container unit 120 means the entire container for accommodating the desiccant, and the cartridge container unit 120 includes a cartridge cover 122 covering the opening of the cartridge body 121 and the cartridge body 121 having a generally cylindrical shape. can do. The cartridge cover 122 functions as a lid that prevents the desiccant from being discharged to the outside, and in the center has an outlet port functioning as an outlet port 172 so that the compressed air that has passed through the desiccant inside the cartridge container unit 120 can be discharged. is formed

At the lower end of the cartridge container part 120, the base part 130 for fixing the cartridge container part 120 therein while being coupled with the housing 110 is installed. Accordingly, the base portion 130 is positioned on the open surface side of the housing 110 , and the base portion 130 functions as a cover for the open surface of the housing 110 . The base part 130 partially closes the open surface of the housing 110 while restricting the movement of fluid in the remaining area of the base part 130 except for the inlet port 171 and the outlet port 172 in the housing. can be sealed.

The specific structure of the base unit 130 is not limited to that illustrated in FIG. 2 , and any structure capable of inflow and outflow of compressed air capable of processing and regeneration may be applied without limitation.

In addition, since the air dryer cartridge 100 is generally mounted directly on the valve assembly of the air treatment system, the air dryer cartridge 100 may have a fastening structure for mounting in the air treatment system. In this example, the base portion 130 may include a fastening structure for mounting directly to a valve assembly of a compressed air treatment system.

Meanwhile, a pre-filter 140 for primarily filtering foreign substances such as oil may be installed inside the air dryer cartridge. The pre-filter in the present invention means a filter member installed upstream of the cartridge container unit 120 in which the desiccant is accommodated, that is, at a position before the compressed air passes through the desiccant (based on the step of supplying (processing) compressed air). can The pre-filter 140 is for adsorbing and removing oil contained in the compressed air, and may be, for example, an oil absorbent paper made of a porous material or a nonwoven material. However, the pre-filter 140 is not limited to the one illustrated above, and during the compressed air treatment process, if the compressed air can be pre-filtered before the compressed air is introduced into the desiccant, it may be used without limitation. However, in the present invention, since it is possible to effectively prevent the oil sorbent paper attached and fixed by the lapping method from being separated, the pre-filter holder 180 according to the preferred embodiment of the present invention is a pre-filter fixed to the cartridge container portion in particular in a lapping method. more suitable for

The cartridge body 121 of the cartridge container unit 120 may have a cylindrical structure concentric with the cylindrical housing 110, thus forming a gap 145 between the cylindrical housing and the cylindrical housing.

The gap 145 between the housing and the cartridge container 120 is a passage through which the compressed air introduced into the cartridge moves. Accordingly, the compressed air introduced into the cartridge when the compressed air is processed passes through the gap 145 and moves toward the desiccant in the cartridge container. On the other hand, when the compressed air is regenerated, the compressed air introduced into the cartridge may pass through the desiccant and be discharged to the outside through the gap 145 .

A filter seat 123 is formed in the cartridge container so that the pre-filter 140 can be installed. The filter seat 123 may be formed on the small diameter portion of the cartridge container formed to facilitate wrapping of the sorbent paper constituting the pre-filter 140 . The cartridge container part accommodates the desiccant therein, and it is preferable to maximize the desiccant storage volume in the cartridge container part in order to maximize the dehumidifying effect by the desiccant. To this end, the cartridge container portion may have a structure including a large-diameter portion having an outer diameter sufficient to approximate the housing and a small-diameter portion for mounting the pre-filter 140 .

A plurality of inlet holes may be formed in the small-diameter portion to allow compressed air to flow toward the desiccant, and the filter seat 123 may be formed on the small-diameter side to support the pre-filter 140 . The filter seat 123 may include a seat surface so that the filter is seated and supported on the cartridge container unit. In addition, the filter mounting unit 123 may include a pair of upper and lower guide units 123a for guiding the pre-filter to be wrapped and limiting the vertical movement of the pre-filter 140 . Accordingly, the filter seat 123 in the filter cartridge according to a preferred embodiment of the present invention includes a seat surface on which the filter can be seated along the circumference of the small-diameter portion and a pair of annular guide portions extending outwardly from the seat surface. (123a) may be included.

In addition, one or more ribs 123b protruding in an outer radial direction may be formed around the inlet holes of the small-diameter portion. The rib 123b supports the pre-filter 140 together with the seating surface, and prevents the pre-filter 140 from retreating by the compressed air flowing in from the housing inner gap 145 during the compressed air treatment step. can do.

According to a preferred embodiment of the present invention, the pre-filter holder 180 may be installed between the housing and the outer surface of the pre-filter 140 installed on the filter seat 123 , and the pre-filter holder 180 is mounted on the pre-filter holder 180 . The pre-filter may be supported and fixed.

As shown in FIG. 2 , the pre-filter holder 180 may be in close contact with the inner surface of the housing at the outer end in the outer circumferential direction, and may be in close contact with the outer circumferential surface of the pre-filter 140 at the inner end.

As shown in FIG. 2 , the pre-filter holder 180 is fixed by a pressure socket 210 and a fastening ring 220 to be described later, and can be in close contact with the inner wall of the housing by the outermost surface of the pressure socket 210 . have. 3 shows an example in which the pre-filter holder 180 is inserted between the housing and the pre-filter in the air dryer cartridge of FIG. 2, and in the example of FIG. An example is shown. For reference, the example of FIG. 3 shows the pre-filter holder 180 to which two filter holding elements 200 and 300 are assembled, and in the example of FIG. It is in close contact with the housing. In addition, in the remaining two places, an example of being in close contact with the housing by the pressing member 240 additionally formed in addition to the pressing socket 210 of the filter holding element 200 is described. In this regard, the position of the pressing socket 210 and the pressing member 240 in close contact with each other and the number of each may be appropriately changed. However, in order to fix the pre-filter and effectively apply a pressing force to the filter, the pressing socket and the pressing member may be arranged at regular intervals to form a circle between the housing and the cartridge container unit. In addition, it is preferable that at least four of the pressing socket and the pressing member are included, and while forming a symmetrical structure, the pressing socket (or pressing member) and the opposite side on the cross-section may be arranged on a position connected by a central axis.

On the other hand, according to a preferred embodiment of the present invention, the compressed air flowing in from the compressor may further include a filtering element of the cartridge container for primary filtering before passing through the pre-filter and the desiccant. Such a filtering element may be a collision member 160 protruding from the outer peripheral surface of the cartridge container.

The collision member 160 is formed to protrude from the outer circumferential surface of the cartridge container unit 120, and the air moving through the gap 145 collides with the collision member 160. It can be configured to primarily filter oil and foreign substances. have.

Each of the collision members 160 is disposed in the gap 145 between the housing 110 and the cartridge container unit 120 , and may be integrally formed with the cartridge container unit 120 by injection molding.

Looking at the supply of compressed air, the air introduced through the compressor is introduced through the inlet port 171 , and then through the gap 145 between the housing 110 and the cartridge container unit 120 , the lower housing 110 . will move upwards from At this time, while the air passing through the gap 145 collides with the collision member 160 in the gap 145 , oil is separated and remains on the collision member 160 . For reference, the separated oil remains on the collision member 160 or falls to the oil sump side of the bottom of the housing 110 on the outer wall of the housing 110 due to gravity. After regeneration is performed, the oils collected in the oil sump or the like may be discharged to the atmosphere together with the regeneration air.

The collision member 160 may be a helical blade type protrusion as shown in FIG. 2 , and since the collision member 160 may be formed as close to the housing 110 as possible, the cartridge internal configuration while the housing is crushed by an external force to prevent them from being damaged. In particular, in the air dryer cartridge according to the preferred embodiment of the present invention, such a collision member and the pre-filter holder 180 can be applied at the same time. When it is deformed, the applied force can be dispersed, so that damage to the housing and the internal components of the cartridge can be effectively prevented.

Hereinafter, an example of the pre-filter holder 180 of the air dryer cartridge for a commercial vehicle according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5 .

4 shows an example of a pre-filter holder 180 assembled by two filter holding elements 200 and 300 as a pre-filter holder 180 according to a preferred embodiment of the present invention, and in FIG. 4 shows the filter holding element 200 constituting the pre-filter holder 180 .

As shown in FIGS. 4 and 5 , the pre-filter holder 180 may be formed by assembling two or more filter holding elements, and the filter holding element 200 is formed to surround and support a portion of the outer peripheral surface of the pre-filter. It may include an arc-shaped frame 230 , a pressure socket 210 formed at one end of the arc-shaped frame 230 , and a fastening ring 220 capable of being fastened to the pressure socket 210 . It means members to which mechanical fastening elements for fastening the filter holding elements adjacent to the pressure socket 210 and the fastening ring 220 are applied, for example, in such a way that the fastening ring 220 is fitted in the pressure socket 210 . can be contracted. Preferably, the pressure socket 210 is for providing a pressing force to the pre-filter side while in contact with the inner wall of the housing, and refers to a configuration for substantially fixing the pre-filter by the pressing force provided toward the pre-filter.

In particular, the pressing socket 210 may include a pressing piece 211 and a fastening groove 212 , and the pressing piece 211 may form a contact surface with the housing in an outermost portion of the arc-shaped frame in an outward direction. It may have a plate shape bent up and down toward. The pressing piece 211 may have a curved shape toward the outside of the arc-shaped frame 230 , and may preferably have a bent plate shape with a constant curvature. Through the structure of the pressing piece 211 as described above, only the outermost end can support the pre-filter while contacting the housing, and as the curved shape of the pressing piece 211 is appropriately deformed, the pressing force by the housing is appropriately distributed toward the arc-shaped frame. It is possible to provide structural stability of the filter holding element and the pre-filter holder as a whole. In addition, the pressing force by the housing is distributed and pressurized to the entire outer periphery of the pre-filter through the pressing piece and the arc-shaped frame, and it is possible to support and press the entire region of the pre-filter.

In addition, the fastening groove 212 may be a groove formed by the reinforcing member 213 supporting the pressing piece 211 while extending vertically in the vertical direction of the pressing piece 211 .

The fastening ring 220 is for coupling with the pressing piece 211, for example, as shown in FIG. 5, may include a latch portion 221 having an inclined surface to be introduced into the fastening groove to be fixed. However, this example is only one example, and may be changed to another form capable of being fastened to the pressing piece 211 .

Further, according to a preferred embodiment of the present invention, the pre-filter holder 180 includes two or more filter holding elements 200 , and the fastening of each filter holding element 200 is connected to the adjacent filter holding element 200 . ) may be coupled to the fastening groove 212 of the. In addition, since the pre-filter is a ring-shaped filter member installed on the cylindrical cartridge body, the pre-filter holder 180 to which each filter holding element is coupled may also have a ring shape corresponding to the shape of the filter member. .

In the example of FIG. 4, two filter holding elements as in FIG. 5 are combined to form the pre-filter holder 180, and the two filter holding elements 200 and 300 have substantially the same shape. That is, each filter holding element includes one pressing socket 210 and one fastening ring 220 , through which the two filter holding elements can be coupled to each other.

On the other hand, unlike the example of FIG. 4 , it may be divided into three or more filter holding elements. In this case, all three or more filter holding elements have the same structure, and each filter holding element has a pre-filter in the same area. It may be configured to be supported.

On the other hand, in the case of configuring the pre-filter holder 180 with two filter holding elements 200 and 300 , unlike the examples of FIGS. 4 and 5 , the first filter holding element constituting the pre-filter holder 180 . 200 and the second filter holding element 300 may be configured to have different sizes. In this example, the two filter holding elements are fastened to each other and assembled to form the pre-filter holder 180 of an annular structure, and the arc-shaped frame 230 of the first filter holding element 200 is the second filter. It is possible to cover a larger area compared to the arc-shaped frame 230 of the holding element 300 .

In the case of configuring the pre-filter holder 180 with two filter holding elements having different cover areas as described above, when assembling, the first filter holding element 200 covering the pre-filter area of 180 degrees or more is first placed on the pre-filter side. After being seated on the , the second filter holding element 300 may be assembled, and in this case, assembling property and filter pressing performance may be improved.

In addition, each of the filter holding elements 200 may further include one or more pressing members 240 formed to protrude between the fastening rings 220 formed at both ends of each filter holding element 200 and the pressing socket 210 . can Such a pressing member 240 may be configured in the same or similar shape to that of the pressing piece 211 described above. Accordingly, the pressing member 240 may have a curved shape toward the outside of the arc-shaped frame 230 , and preferably, may have a bent plate shape with a constant curvature. Unlike the pressing socket 210 , the pressing member 240 does not have a separate fastening groove 212 , and may have a form including only the pressing piece 211 .

In addition, the arc-shaped frame 230 constituting the filter holding element 200 is a pair of main horizontal frames 231 arranged vertically and a pair of main vertical frames connecting between the main horizontal frames 231 . (232) may be included. As shown in FIG. 5 , the main horizontal frames 231 are arc-shaped frames extending in the horizontal direction, and a pair of upper and lower sides may be provided. In addition, these main horizontal frames 231 may be formed to be fitted between a pair of guide parts 123a of the filter seating part 123 formed on the cartridge container part, and through this, the pre-filter holder 180 . can be regulated to move up and down.

In addition, the main horizontal frames 231 are connected by a plurality of first auxiliary supports 233 formed perpendicular to the main horizontal frames 231 , and a plurality of openings between the first auxiliary supports 233 . Fields 235 and 236 may be formed. As shown in FIG. 5 , various types of openings may be applied to the plurality of openings 235 and 236 .

One or more second auxiliary supports 234 extending in a horizontal direction may be formed between at least some of the main vertical frames 232 and the first auxiliary supports 233 extending in the vertical direction. The first and second auxiliary supports 233 and 234 serve to provide structural rigidity of the arc-shaped frame 230 and function to prevent the pre-filter holder 180 from being damaged by the force of compressed air. However, since the first and second auxiliary supports 233 and 234 block the flow of compressed air, the optimal arrangement of these first and second auxiliary supports 233 and 234 is required for system efficiency and structural robustness. do.

Meanwhile, the aforementioned pressing members 240 may be formed between the first auxiliary supports 233 that are not connected by the second auxiliary supports 234 . In this regard, since the pressing member 240 may function as an additional reinforcing material in the portion where the pressing member 240 is additionally formed, the second auxiliary support 234 is not added in the region where the pressing member 240 is formed, It can be designed to secure the maximum area of the opening through which the compressed air can move.

4 shows an example in which the pre-filter is supported by the pre-filter holder 180 to which the filter holding element 200 having such a configuration is assembled. 123), the pre-filter can be supported by the pre-filter holder 180 during regeneration. can be effectively prevented. In particular, according to the present invention, in fixing the pre-filter, the pre-filter holder is inserted into the housing in a state of being temporarily assembled on the outside of the pre-filter and assembled. Since it can be fixed, the pre-filter is characterized in that it can effectively fix the pre-filter in both compressed air supply and regeneration.

In addition, as shown in FIG. 2 , a constant level of pressing force can be continuously provided to the pre-filter by the pre-filter holder that is inserted into the housing and fixed the pre-filter, so that the porosity of the pre-filter can be continuously maintained at a constant level. Therefore, it is possible to improve filter durability and maintain continuous filter performance.

In the above, the present invention has been described in detail based on the embodiments and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the contents described in the following claims.

100: air dryer cartridge 110: housing
120: cartridge container 121: cartridge body
122: cartridge cover 123: filter seat
130: base 140: pre-filter
150: spring member 160: collision member
170: desiccant 180: pre-filter holder
200: first filter holding element 300: second filter holding element
210: press socket 211: press piece
212: fastening groove 213: reinforcing member
220: fastening hook 221: clasp
230: arc frame 231: main horizontal frame
232: main vertical frame 233: first auxiliary support
234: second auxiliary support 235, 236: opening
240: pressure member

Claims (15)

As a pre-filter holder to support the pre-filter installed in the commercial vehicle air dryer cartridge,
The pre-filter holder is made by assembling two or more filter holding elements,
The filter holding element comprises:
an arc-shaped frame formed to surround and support a portion of the outer circumferential surface of the pre-filter;
a pressure socket formed at one end of the arc-shaped frame; and
and a fastening ring capable of being fastened to the pressure socket;
The pressure socket pre-filter holder, characterized in that it comprises a pressing piece and a fastening groove.
delete The method according to claim 1,
The pressing piece has a plate shape bent up and down to form a contact surface with the housing on the outermost part,
The fastening groove is a pre-filter holder, characterized in that the groove is formed by a reinforcing member for supporting the pressing piece while vertically extending up and down of the pressing piece.
4. The method of claim 3,
The fastening ring is a pre-filter holder, characterized in that it includes a clasp having an inclined surface so that it can be fixed by being introduced into the fastening groove.
The method according to claim 1,
A fastening ring of each filter holding element is coupled to a fastening groove of an adjacent filter holding element,
The pre-filter holder to which each of the filter holding elements is coupled is a pre-filter holder, characterized in that it has a ring shape.
6. The method of claim 5,
All of the two or more filter holding elements have the same structure,
Each filter holding element is configured to support the pre-filter in the same area.
The method according to claim 1,
The pre-filter holder has an annular structure in which a first filter holding element and a second filter holding element are fastened to each other,
The pre-filter holder of claim 1, wherein the arc-shaped frame of the first filter holding element is configured to cover a larger area than the arc-shaped frame of the second filter holding element.
The method according to claim 1,
Each filter holding element is
The pre-filter holder further comprising one or more pressing members protruding between the fastening rings formed at both ends of each filter holding element and the pressing socket.
9. The method of claim 8,
The arc frame is
a pair of main horizontal frames arranged vertically;
A pre-filter holder comprising a; a pair of main vertical frames connecting the main horizontal frames.
10. The method of claim 9,
The main horizontal frames are
connected by a plurality of first auxiliary supports formed perpendicular to the main horizontal frames,
A pre-filter holder, characterized in that a plurality of openings are formed between the first auxiliary supports.
11. The method of claim 10,
One or more second auxiliary supports extending in a horizontal direction are formed between the main vertical frames extending in the vertical direction and at least some of the first auxiliary supports.
12. The method of claim 11,
The pre-filter holder, characterized in that the pressing member is formed between the first auxiliary support not connected by the second auxiliary support.
An air dryer cartridge in which a pre-filter installed on a cartridge container in which a desiccant is accommodated is supported by the pre-filter holder according to any one of claims 1 to 12.
14. The method of claim 13,
The pre-filter holder is inserted and assembled into the housing in a state of being temporarily assembled on the outside of the pre-filter to fix the pre-filter, and as the pre-filter holder is pressed by the inner wall of the housing, the pre-filter is fixed Air dryer cartridge featuring.
15. The method of claim 14,
A gap for moving compressed air is formed between the outer peripheral surface of the cartridge container and the inner wall of the housing,
The air dryer cartridge according to claim 1, wherein a collision member is installed in the gap, and the air moving through the gap is configured to filter oil while impinging on the collision member.

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