KR102119042B1 - Compressed air filter unit - Google Patents

Abstract

The present invention relates to a filter unit. The present invention is an embodiment, a housing in which an inlet through which air is introduced and an outlet through which filtered air is discharged are provided, and a mounting hole through which a filter is coupled is formed, an insertion hole coupled to the mounting hole of the housing is formed, and the housing is formed. It is coupled to the mounting hole of the filter cartridge which is located inside the housing and filters the air introduced from the inlet of the housing and discharges it to the outlet of the housing, and between the mounting hole and the insertion hole when the housing and the filter cartridge are combined. A filter unit including an airtight member interposed therebetween is provided.

Description

Compressed air filter unit

The present invention relates to a filter unit that filters foreign substances from a fluid such as air or oil, and more particularly, to a compressed air filter unit that filters foreign substances from compressed air.

Various mechanical devices that use air are configured to filter out foreign substances contained in the air and then suck them into the device, rather than inhaling and using the outside air.

To this end, a filter unit is used to filter out foreign substances in the air. The filter unit is constructed by combining the filter cartridge to filter air inside the detachable housing into two parts so that they can be exchanged.

As the filter unit is used, various foreign matters are attached to the filter, so that the function is deteriorated, and when the function is deteriorated, it is necessary to replace it. In the case of the conventional filter unit, it was common to replace the filter cartridge by separating the filter cartridge in a state where the filter cartridge is screwed into the housing and fastened.

Such a screw-type filter cartridge is firmly coupled, but has a hassle of removal. In addition, there was a lot of difficulty in replacing the filter due to rust or debris attached to the screw part gradually.

Republic of Korea Registered Patent No. 10-1800405 (Nov. 16, 2017) Republic of Korea Registered Patent No. 10-1747961 (2017.06.09)

The present invention, in the filter unit, is intended to improve the ease of attachment and detachment of the filter cartridge. In addition, it is intended to effectively prevent foreign substances from penetrating the filter cartridge.

Other detailed objects of the present invention will be clearly understood and understood by experts or researchers in this technical field through specific contents described below.

In order to solve the above problems, the present invention is an embodiment, a housing in which an inlet through which air is introduced and an outlet through which filtered air is discharged are provided, and a mounting hole through which a filter is coupled is formed, coupled to a mounting hole of the housing An insertion hole is formed, coupled to the mounting hole of the housing, located inside the housing, and filters the air introduced from the inlet of the housing and discharges it to the outlet of the housing. A filter unit including an airtight member interposed between a mounting hole and the insertion hole is provided.

Here, the mounting hole of the housing includes a mounting rib formed protrudingly and a stepped jaw formed at the base of the mounting rib, and the insertion hole of the filter cartridge includes an insertion rib coupled to the mounting rib and a flange contacting the surface of the stepped jaw. Included, the hermetic member may be interposed between the mounting rib and the insertion rib and between the face of the stepped and the flange, respectively.

In addition, the face of the stepped side and the flange may be formed to be inclined to have an oval entrance.

The filter unit may be formed with a protrusion having an inclined surface at the lower portion of the housing and pressing the end of the filter cartridge at the inclined surface to fix the position.

On the other hand, the filter unit further includes a coupling member coupled to the mounting hole of the housing, the coupling member and the insertion rib of the filter cartridge are formed with a plurality of fitting portions and coupling portions at equal intervals, and the fitting portion of the coupling member It is a projection of a parallelogram section with a long bottom side along the circumferential direction of the outer circumferential surface or the inner circumferential surface of the insert rib, and the engaging portion is formed along the circumferential direction of the inner circumferential surface of the insertion rib or the outer circumferential surface of the coupling member so as to correspond to the fitting portion. , An inclined surface that meets an end portion of the fitting portion may be formed at the front end portion and the rear end portion.

According to an embodiment of the present invention, the filter cartridge can be easily replaced by being easily detachable. In addition, it is possible to easily detach and detach even after a long time by blocking foreign matter from entering the filter cartridge.

Other effects of the present invention will be clearly understood and understood by experts or researchers in this technical field through specific contents described below or during the process of carrying out the present invention.

1 is a perspective view showing a use case of a compressed air filter unit according to an embodiment of the present invention.
2 is a sectional view of a filter unit according to a first embodiment of the present invention.
3 is a cross-sectional view of a filter unit according to a second embodiment of the present invention.
4 is a sectional view of a filter unit according to a third embodiment of the present invention.
5 is a perspective view showing a one-touch mounting structure of a filter unit according to a third embodiment of the present invention.
Fig. 6 is a plan view showing the main part of the third embodiment in a plan view;
7 and 8 are views sequentially showing the assembly process of the third embodiment deployed in a plane.

The above-described features and effects of the present invention will become more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. Will be able to. The present invention can be applied to various changes and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, it is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention. Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention.

Hereinafter, a compressed air filter unit according to an embodiment of the present invention will be described in detail with reference to the drawings. In the present specification, the same similar reference numerals are assigned to the similar configurations in different embodiments, and the description is replaced with the first description.

The compressed air filter unit 100 according to an embodiment of the present invention includes a housing 1, a filter cartridge 2 and an airtight member 3.

The housing 1 is provided with an inlet through which air flows in and an outlet through which filtered air flows out, and a mounting hole 13 into which the filter cartridge 2 is coupled is formed. The air introduced through the inlet port is introduced into the filter cartridge 2 through the mounting port 13.

The filter cartridge 2 is provided with an insertion hole 24 that is coupled to the mounting hole 13 of the housing 1. The filter cartridge 2 is coupled to the mounting hole 13 of the housing 1 and is located inside the housing 1 and filters the air introduced from the mounting hole 13 to discharge it to the outlet of the housing 1.

At this time, the airtight member 3 is interposed between the mounting hole 13 and the insertion hole 24 to which the housing 1 and the filter cartridge 2 are coupled. The airtight member 3 serves to prevent foreign matter from penetrating between the mounting hole 13 and the insertion hole 24 and at the same time, assist in maintaining the bonding state between the mounting hole 13 and the insertion hole 24.

The compressed air filter unit 100 having such a configuration can easily mount the filter cartridge 2 to the mounting hole 13 of the housing 1, and the housing 1 and the filter by the airtight member 3 It prevents foreign matter from penetrating into the coupling portion of the cartridge 2, and thus it is easy to detach and attach even after a long time.

Hereinafter, the configuration of each part will be described in detail with reference to the drawings.

1 is a perspective view showing a use case of a compressed air filter unit according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the filter unit according to the first embodiment of the present invention.

The housing 1 can be mounted as a part of any mechanical device, and is provided with an inlet and an outlet to be connected to the compressed air inlet and outlet lines, respectively. The cartridge housing 1 is made of two parts up and down, and both are assembled detachably. The upper part 11 is provided with a mounting hole 13 to which the filter cartridge 2 is detachably coupled.

Referring to the drawing, the mounting hole 13 of the housing 1 is formed to protrude and a stepped step formed on the base of the mounting rib 131 and the mounting rib 131 to flow the compressed air flowing into the filter cartridge 2 132). A groove 133 for coupling the hermetic member 3 may be formed on the mounting rib 131 and the stepped 132.

Meanwhile, a protrusion 14 having an inclined surface 141 may be formed on the lower part 12 of the housing 1. The protrusion 14 is configured to press the filter cartridge 2 in an upward direction to securely fix the filter cartridge 2.

After separating the upper part 11 and the lower part 12 of the housing 1, mounting the filter cartridge 2, and assembling the lower part 12, the filter cartridge 2 is placed on the inclined surface 141 of the protrusion 14 ) Is pressed so that the filter cartridge 2 is not separated from the mounting port 13.

At this time, as the shape of the lower part 12 of the housing 1 extends downward, the cross-sectional area is reduced, and the lower end of the filter cartridge 2 may be pressed from the inner wall surface of the lower part 12.

The housing of this configuration can be made of a metal material and can be made by a die casting method.

The filter cartridge 2 is provided with a filter means 23 for filtering foreign matter such as dust or oil, and an insertion hole 24 that is detachably coupled to the mounting hole 13.

As the insertion hole 24 of the filter cartridge 2 is engaged with the mounting hole 13 of the cartridge housing 1, the mounting of the filter cartridge 2 is made. In this embodiment, the filter cartridge 2 can be simply combined by pressing it into the mounting hole 13 of the housing 1. Accordingly, inside the housing 1, a flow path is formed in which compressed air entering the inflow line moves through the filter means 23 to the outflow line.

Referring to the drawing, the filter cartridge 2 closes one side of the filter cartridge 2 and includes a first cap 21 in which an insertion port 24 is formed, an insertion port 24 formed in the first cap 21, and a filter It comprises a means (23) and a second cap (22) closing the other side.

The insertion hole 24 of the filter cartridge 2 includes an insertion rib 241 coupled to the mounting rib 131 and a flange 242 contacting the surface of the stepped 132 of the mounting hole 13. Here, a groove 243 to which the hermetic member 3 is coupled may be formed at the insertion rib 241 and the flange 242.

In the filter cartridge 2, the first cap 21 and the second cap 22 may be made of synthetic resin material, and specifically, plastic injection molding. The filter means 23 comprises a filter member such as a non-woven fabric.

The airtight member (3) is interposed between the mounting hole (13) and the insertion hole (24) when the mounting hole (13) of the housing (1) and the insertion hole (24) of the filter cartridge (2) are engaged, so that foreign matter is present in the bonding portion. Block penetration.

In the present embodiment, the airtight member 3 is formed of a circular O-ring, and is interposed between the mounting rib 131 and the insertion rib 241 and between the face of the stepped 132 and the flange 242, respectively. ) To block the space between the outside and the outside. Here, the space between the two airtight members 3 is a part where the housing 1 and the filter cartridge 2 are combined, so that foreign matter does not penetrate into this part, so that the foreign matter accumulates in the bonding part, so that the filter cartridge 2 is detachable. It is possible to prevent the phenomenon from becoming difficult.

When the grooves 133 and 243 are formed in the mounting rib 131, the insertion rib 241, the stepped 132, and the flange 242, the airtight member 3 is seated inside the grooves 133 and 243. The airtight member 3 may be made of a material having elasticity such as rubber and difficult to penetrate foreign substances.

Hereinafter, a filter unit according to a second embodiment of the present invention will be described in detail with reference to the drawings. The filter unit according to the second embodiment of the present invention can be applied to the description of the filter unit according to the first embodiment within a range that does not interfere.

3 is a cross-sectional view of a filter unit according to a second embodiment of the present invention.

In the filter unit according to the second embodiment of the present invention, the surface of the stepped 132 of the housing 1 and the flange 242 of the filter cartridge 2 are formed at an inclined shape, and the two inclined surfaces are in contact with each other, so that the coupling is achieved. Is done.

Accordingly, the hole formed in the insertion hole 24 of the filter cartridge 2 has an elliptical inlet, and the shape of the airtight member 3 interposed between the face of the stepped 132 and the flange 242 is also elliptical. Meanwhile, an elliptical groove may be formed between the mounting rib 131 and the insertion rib 241, and an oval airtight member 3 may be interposed.

Referring to the drawings, the surface of the stepped 132 in this embodiment has a shape in which the right side with the outlet is in a higher position and the flange 242 is also inclined down to the left in a higher right state.

Thus, by inclining the surface of the stepped 132 and the flange 242, the area where the mounting ribs 131 and the insertion ribs 241 abut increases, thereby increasing the coupling force and forming the protrusions 14 in the housing 1 It can be expected that the bond is maintained without being performed. On the other hand, by making the position of the stepped 132 on the outlet side higher, the material for manufacturing the housing 1 can be reduced, and the passage to the outlet is enlarged, so that the filtered compressed air can flow out smoothly.

On the other hand, the horizontal cross-sectional shape of the mounting rib 131 and the insertion rib 241 may be elliptical, or by increasing the eccentricity of the ellipse to increase the area where the mounting rib 131 and the insertion rib 241 abut, the protrusion 14 Without binding.

Hereinafter, a filter unit according to a third embodiment of the present invention will be described in detail with reference to the drawings. The filter unit according to the third embodiment of the present invention may be applied to the description of the filter unit according to the first embodiment within a range that does not interfere.

4 is a cross-sectional view of a filter unit according to a third embodiment of the present invention.

The filter unit according to the third embodiment of the present invention further includes a coupling member 4 coupled to the mounting hole 13 of the housing 1.

The coupling member 4 is coupled to the mounting rib 131 of the housing 1. Accordingly, a difference in thickness occurs between a portion where the coupling member 4 is coupled in the mounting rib 131 and other portions. Therefore, in consideration of this, the insertion rib 241 of the filter cartridge 2 is preferably a stepped shape.

At this time, the airtight member 3 is preferably formed to form grooves 133 and 243 in the mounting rib 131 where the coupling member 4 is not located and the stepped portion from the insertion rib 241 to intervene. Do.

The coupling member 4 functions to more firmly couple the housing 1 and the filter cartridge 2. The coupling member 4 is a synthetic resin material and can be manufactured through plastic injection. In addition, the bonding member 4 may be bonded to the mounting rib 131 of the housing 1 by using an adhesive and heat-sealing method, or by using a separate fastening member. At this time, by forming a projection 44 on the outer circumference of the coupling member 4 to be coupled to the groove of the mounting hole 13, the coupling member 4 is prevented from rotating and the coupling member 4 is attached to the mounting hole 13 It can be combined more firmly.

On the other hand, it is possible to form the configuration of the coupling member 4 directly on the mounting rib 131 without using the coupling member 4, but it is better to use a synthetic resin coupling member 4 than the metallic mounting rib 131. The advantages of easy molding and economical cost.

In addition, when the coupling member 4 is used, the filter cartridge 2 can be firmly fixed without forming the protrusion 14 in the housing 1. In this embodiment, the filter cartridge 2 can be simply coupled in a one-touch manner by pressing and rotating it into the mounting hole 13 of the housing 1.

The specific structure of the coupling member and the structure in which the filter cartridge is coupled are as follows.

The fitting member 25 and the insertion rib 241 of the filter cartridge 2 are formed with a plurality of fitting portions 25 and engaging portions 41 at equal intervals. Here, the fitting portion 25 is a projection of a parallelogram section in which the long base 251 is disposed along the circumferential direction of the outer circumferential surface of the coupling member 4 or the inner circumferential surface of the insertion rib 241, and the coupling portion 41 is a fitting portion It is formed along the circumferential direction of the inner circumferential surface of the insertion rib 241 or the outer circumferential surface of the coupling member 4 so as to correspond to (25), and the front end and rear end are inclined surfaces 412 that meet the ends of the fitting portion 25. .

Hereinafter, a structure in which the filter cartridge 2 is coupled by the coupling member 4 will be described in detail with reference to the drawings.

5 to 6 are associated with the mounting hole 13 of the filter cartridge housing 1 and the insertion hole 24 of the filter cartridge 2. In this drawing, the fitting portion 25 is formed in the insertion hole 24, and the engaging portion 41 is formed in the engaging member 4.

The insertion hole 24 has a cylindrical end portion, and a plurality of fitting portions 25 protrude radially on the inner circumferential surface. The fitting portion 25 is provided with three in the circumferential direction on the inner circumferential surface, and these fitting portions 25 are formed at equal intervals.

Referring to (a) of FIG. 6, the fitting portion 25 is formed at a distance from the end of the insertion hole 24. The fitting portion 25 has a parallelogram cross section in which the base 251 is placed in the circumferential direction of the insertion hole 24.

Both sides of the fitting portion 25 are formed with a bevel, and the inclined direction of the bevel is a downward slope with respect to the direction in which the filter cartridge 2 is inserted (shown by a block arrow).

On the other hand, the coupling member 4 is provided with a coupling portion 41 to be detachably coupled to the insertion hole 24. The coupling member 4 has a cylindrical shape, and its outer diameter is smaller than the inner diameter of the insertion hole 24.

On the outer circumferential surface of the coupling member 4, a coupling portion 41 mounted on the fitting portion 25 protrudes. A plurality of coupling parts 41 are formed at equal intervals, and in the illustrated embodiment, three are provided in the circumferential direction of the coupling member 4.

Referring to (b) of FIG. 6, the coupling portion 41 is a substantially parallelogram cross-section, and the upper side 411 is flush with the front end of the coupling member 4. The outer diameter of the engaging member 4 is widened by the thickness of the engaging portion 41, which is substantially the same as or slightly smaller than the inner diameter of the insertion hole 24.

The front end and the rear end of the engaging portion 41 are formed with an inclined surface 412 that meets the inclined surface of the end of the fitting portion 25. At this time, the inclined direction of the inclined surface 412 is the same as the inclined direction of the inclined surface of the inclined surface of the fitting portion 25 described above, with respect to the direction in which the coupling member 4 enters the mounting hole 13 (shown by a block arrow). .

On the other hand, the engaging member 4 is spaced apart from the engaging portion 41 at intervals corresponding to the width of the fitting portion 25, and a locking jaw 43 is formed to form an engaging space for receiving the fitting portion 25. It is.

The locking jaw 43 is in contact with the base 251 of the fitting portion 25, thereby determining the insertion position of the insertion hole 24. At this time, the insertion position is preferably such that the stepped 132 and the flange 242 come into contact with the airtight member 3. In addition, the upper and lower sides of the fitting portion 25 are brought into contact and received in the coupling space S, thereby preventing separation of the fitting portion 25 due to friction.

As an additional configuration of the engaging portion 41, an extended portion 42 extending from the rear end of the engaging portion 41 to the engaging jaw 43 is formed. The extension portion 42 has a shape extending along the inclined surface 412 of the rear end portion of the coupling portion 41, and makes a part of the coupling space S a closed space. That is, when the fitting portion 25 moves in the circumferential direction of the coupling member 4 in the coupling space (in the left and right directions in the drawing in FIG. 6), the fitting portion 25 does not go over the coupling space, so that the fitting portion ( 25) will limit the mounting position.

In addition, as the extension portion 42 is formed obliquely along the inclined surface 412 of the rear end portion of the coupling portion 41, the shape in the coupling space also corresponds to the angled shape of the fitting portion 25.

7 to 8 relate to the use state of the embodiment of the present invention. In the drawings, the two-dot chain line is the distal end of the engaging member 4, and the dotted line is the distal end of the insertion hole 24.

Fig. 7(a) shows the situation where the filter cartridge 2 is brought to the mounting hole 13 of the filter housing 1. The distal end of the engaging member 4 of the filter cartridge 2 enters the insertion hole 24, and the distal end 251 of the fitting portion 25 is engaged with the distal end of the engaging portion 41. The operator rotates the filter cartridge 2 while pushing it toward the mounting hole 13, and is in the direction of the arrow in the drawing.

FIG. 7B shows a situation in which the fitting portion 25 enters between the coupling portions 41 as the insertion hole 24 is rotated (moved to the right in the drawing, hereinafter the same). The hypotenuse 252 of the fitting portion 25 slides on the inclined surface 412 of the rear end of the engaging portion 41 and the inclined extension portion 42, and the insertion hole 24 further enters the engaging member 4 (drawings) Is moved in the downward direction, hereinafter the same).

FIG. 7( c) shows a state in which the rearward hypotenuse 252 of the fitting portion 25 contacts the front end portion of the adjacent engaging portion 41 by the operator further rotating the filter cartridge 2. Specifically, the rear hypotenuse 252 of the fitting portion 25 comes into contact with the inclined surface 412 of the tip of the adjacent coupling portion 41, so that the insertion hole 24 can further enter the coupling member 4 inside.

During this process, the fitting portion 25 gradually enters the engaging space S between the engaging portion 41 and the locking jaw 43.

8D and 8E sequentially show the process in which the fitting portion 25 is accommodated into the coupling space S of the coupling member 4 by further rotating the filter cartridge 2. The fitting portion 25 enters the coupling space S until it contacts the extension portion 42, so that the filter cartridge 2 is fastened to the cartridge housing 1.

The separation process of the filter cartridge 2 consists of proceeding from (a) to (b) of FIGS. 7 to 8 in reverse order, and detailed description is omitted.

When such a one-touch mounting structure is added, it is easy to mount or remove the filter cartridge 2, and at the same time, it is possible to prevent foreign matter from entering the portion where the filter cartridge 2 is coupled, and the filter cartridge 2 without a protrusion 14 Can maintain a tightly coupled state.

In addition, the hypotenuse 252 of the fitting portion 25 and the inclined surface 412 of the engaging portion 41 help the filter cartridge 2 to move in a certain direction while being interviewed, thereby reducing the possibility of mis-assembly of the filter cartridge 2, It makes it easier to attach and detach.

The compressed air filter unit as described above is not limited to the configuration and method of the above-described embodiments, the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made It might be. Also, in addition to compressed air, the present invention can be applied to a filter unit that filters foreign substances from a fluid such as air or oil.

In the detailed description of the present invention described above, the present invention has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those skilled in the art will appreciate the spirit of the present invention as set forth in the claims below. And it will be understood that various modifications and changes can be made to the present invention without departing from the technical scope.

1: Housing
11: Upper part 12: Lower part
13: mounting hole 131: mounting rib 132: step 133: groove
14: protrusion 141: slope
2: Filter cartridge
21: first cap 22: second cap 23: filter means
24: insertion hole 241: insertion rib 242: flange 243: groove
25: fitting portion 251: base 252: hypotenuse
3: Airtight member
4: Coupling member
41: engaging portion 411: upper side 412: slope
42: extension 43: a locking jaw
S: Combined space
100: compressed air filter unit

Claims (4)

The housing is provided with an inlet through which air is introduced and an outlet through which filtered air is discharged, and a mounting hole through which a filter is coupled is formed.
A filter cartridge is formed in which an insertion hole coupled to the mounting hole of the housing is formed, is coupled to the mounting hole of the housing, is located inside the housing, and filters the air introduced from the inlet of the housing to discharge it to the outlet of the housing.
An airtight member disposed between the mounting hole and the insertion hole when the housing and the filter cartridge are engaged.
Including,
The mounting hole of the housing includes a mounting rib formed by protruding and a stepped bend extending from the mounting rib and formed at the base of the mounting rib,
The insertion hole of the filter cartridge includes an insertion rib coupled to the mounting rib and a flange that is bent and extended from the insertion rib to contact the surface of the stepped shoulder,
The hermetic member is interposed between the end of the mounting rib and the insertion rib, and between the face of the step and the flange,
The horizontal cross-sectional shape of the mounting rib and the insertion rib is made of oval.
Filter unit. delete delete According to claim 1,
A filter unit is formed at a lower portion of the housing to form a protrusion having an inclined surface, and pressing the end of the filter cartridge at the inclined surface to fix a position.

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