KR102156747B1 - Filter holder - Google Patents

Abstract

The present invention relates to a filter holder device for fine particle collection. As an inflow port and an inflow hole are formed on an upper side and a lateral side of a holder case, respectively, a connection pipe can be selectively connected to one of the inflow port and the inflow hole in accordance with an installation environment, which can lead to more convenient installation work. Also, as test target gas flows in through the inflow hole on the lateral side, fine particles can be collected evenly throughout the entire area of a filter, which can facilitate analysis of the fine particles and improve analysis accuracy. Also, processes of inserting and fixing a filter into an internal space and separating and withdrawing the filter can be conveniently performed without close attention through a filter fixing module. When the filter needs to be separated and withdrawn, the filter can be prevented from falling. Thus, the filter can be more stably separated and withdrawn. In particular, as the filter is made to be separated and withdrawn by tweezers, the filter can be more conveniently and stably separated and withdrawn.

Description

Filter holder device for collecting fine particles{FILTER HOLDER}

The present invention relates to a filter holder device for collecting fine particles. In more detail, by forming an inlet port and an inlet hole on the top and side of the holder case, you can selectively connect the connection pipe to either the inlet port or the inlet hole depending on the installation environment, making the installation more convenient. Through the inflow of the gas to be tested through the side inlet hole, the fine particles are evenly collected over the entire area of the filter, making it easy to analyze the fine particles and improve the analysis accuracy. The operation of inserting and fixing the filter and the operation of separating and drawing out the filter can also be performed conveniently without careful attention, and the filter can be removed more stably because it can prevent the filter from falling when the filter is separated and withdrawn. The present invention relates to a filter holder device for collecting fine particles capable of separating and withdrawing the filter more conveniently and stably by allowing the filter to be separated and withdrawn using tweezers.

Particulate floating in the air can be defined as liquid particles or solid particles, and particulate matter can be subdivided into dust, mist, fume, etc. depending on the physical state. These particulate matters have numerous emission sources such as automobile exhaust gas, factory exhaust gas, road ash scattering dust, and Chinese yellow dust, and are classified into fine particles (PM10) or ultrafine particles (PM25) according to their size.

When these fine particles are discharged into the atmosphere, they generate ultra-fine particles through atmospheric chemical reactions, and ozone, which is the cause of secondary pollutants, is generated. In addition, the fine particles contain a large amount of carcinogens, and they are not filtered into the airways or mucous membranes when breathing, and they accumulate well in the body, such as being able to penetrate deep into the alveoli or move to the brain, thereby threatening human health in various forms.

In order to accurately assess the risk of particulate matter, it is very important to collect fine particles discharged from automobiles or suspended in the air, and analyze the mass concentration and chemical composition of the collected fine particles, and it is very important to collect fine particles for this analysis. Various collection devices are used.

As a collection device for fine particles, a membrane filter, a sizeselective sampling device (Cyclone), a horizontal elutriator, a cascade impactor, and an impinger Collecting devices of various structures such as (Impinger) are used.

Filters are most commonly used to collect and analyze fine particles.The fine particles are filtered through the filter, and the fine particles filtered through the filter are analyzed in a separate laboratory to determine the chemical composition and concentration of the fine particles. .

The filter used for collecting fine particles is fixedly constrained by a separate filter holder device and connected to the piping line through which air flows.The filter holder device according to the prior art works to fix the filter and collect the fine particles. There is a problem that the operation is inconvenient because it is very difficult to remove the filter.In addition, if the horizontal state of the filter is not maintained during the process of removing the filter by the operator, the filter may accidentally fall from the filter holder device and be caused by surrounding substances. It is easy to be contaminated, and accordingly, there is a problem that very close attention must be paid to the filter separation operation.

Domestic registered patent No. 10-1483602

The present invention was invented to solve the problems of the prior art, and an object of the present invention is to form an inlet port and an inlet hole on the upper and side surfaces of the holder case, respectively, so that the connecting pipe is inserted among the inlet port and the inlet hole according to the installation environment. Since it can be selectively connected to any one, installation can be performed more conveniently, and the gas to be tested diffuses throughout the internal space through inflow through the side inlet hole, so that fine particles are evenly collected over the entire area of the filter. It is to provide a filter holder device for collecting fine particles that can easily analyze particles and improve analysis accuracy.

Another object of the present invention is not only to facilitate the operation of inserting and fixing the filter into the internal space through the filter fixing module, but also the operation of separating and withdrawing the filter after the collection of fine particles is completed. It is to provide a filter holder device for collecting particles.

Another object of the present invention is to prevent the filter from falling even if the filter fixing module is not horizontally arranged, so that the filter can be prevented from dropping when the filter is separated and withdrawn, so that the filter can be separated and withdrawn more stably. In particular, it is to provide a filter holder device for collecting fine particles capable of separating and drawing out the filter more conveniently and stably by allowing the filter to be separated and withdrawn using tweezers.

In the present invention, in the filter holder device formed so that the filter can be fixed in the internal space to collect fine particles, and the filter can be separated and withdrawn from the internal space after collecting the fine particles, the gas to be tested can be introduced. A holder case in which the upper case is formed with an inlet port on the upper surface so that the test target gas is discharged, and the lower case is formed with an exhaust port on the lower surface so that the gas to be tested can be discharged. ; And a filter fixing module mounted inside the holder case such that the filter for collecting fine particles is formed to be mounted and fixed, and the filter is disposed in a direction orthogonal to the flow direction of the gas to be tested in the inner space of the holder case, A separate inlet hole is formed on the side of the upper case, and one of the inlet port and the inlet hole is selectively opened to allow the gas to be tested to flow into the filter holder device for collecting fine particles. .

In this case, as the upper case is coupled to the lower case, the filter fixing module may be formed to be pressed in the holder case to be fixed in position.

In addition, the upper case is formed in a hollow cylindrical shape with an open bottom surface, the lower case is formed in a hollow cylindrical shape with an open top surface, and the upper case has a lower inner surface of the lower case. Combined with the lower case in a form in contact with the outer surface of the upper end, the filter fixing module is seated and supported on the upper end of the lower case, and the upper case downwards the upper end of the filter fixing module in a state coupled to the lower case A pressing protrusion that can be pressed and fixed in position may be formed inside.

In addition, a coupling stepped portion is formed at the upper end of the lower case in a form that protrudes in an inward direction so that the diameter decreases, and the upper case is coupled to the lower case in a form in which the inner side contacts the outer surface of the coupling stepped portion. And, the filter fixing module may be seated and supported on an upper end of the coupling stepped portion.

In addition, threads corresponding to each other are formed on an inner surface of the lower end portion of the upper case and an outer surface of the coupling stepped portion, so that the upper case and the lower case may be screwed together.

In addition, the filter fixing module includes a disk-shaped seating portion in which a plurality of gas flow holes are formed so that the filter is seated, a side extension extending upwardly along an edge of the seating portion, and an outer side from an upper end of the side extension portion. A filter support including a support wing that extends horizontally in the direction and is seated and supported on an upper end of the lower case; And a filter pressurizing portion having an outer surface formed in a hollow cylindrical shape in contact with the inner surface of the side extension and inserted into the filter support so as to press the filter seated in the seating portion downward, from the top of the filter pressurizing portion to the outside. And a centering pressing member including a support wing portion which is horizontally extended and seated and supported on an upper surface of the support wing portion, and the pressing protrusion of the upper case may press the upper surface of the support wing portion of the centering pressing member.

In addition, a tweezer insertion hole may be formed in the filter support in an up-down direction from a lower end to an upper end, and the tweezer insertion hole may be formed in a shape in which the upper end is open to the outside.

In addition, the centering pressing member may have a long insertion protrusion protruding from the outer circumferential surface of the filter pressing unit in the vertical direction so as to slide into the tweezer insertion hole during insertion into the filter support.

In addition, in the lower case, a separate lower guide plate may be disposed below the filter support so as to guide the flow of the test target gas that has passed through the filter and the filter support toward the center toward the discharge port.

In addition, a central flow hole is formed in the center of the lower guide plate to pass the gas to be tested, and a plurality of radial flow paths formed in a radial direction so as to be connected to the center flow hole on the upper surface of the lower guide plate, and a plurality of the A plurality of connection passages formed in a circumferential direction to connect the radiation passages may be formed in a concave shape.

According to the present invention, by forming an inlet port and an inlet hole on the upper and side surfaces of the holder case, respectively, the connection pipe can be selectively connected to one of the inlet port and the inlet hole according to the installation environment, thereby performing the installation more conveniently. Through the inflow through the side inlet hole, the gas to be tested diffuses entirely in the internal space, so that the fine particles are evenly collected over the entire area of the filter, making it easy to analyze the fine particles and improve the analysis accuracy. have.

In addition, the filter fixing module facilitates the operation of inserting and fixing the filter into the internal space, as well as the operation of separating and withdrawing the filter after the collection of fine particles is completed, there is an effect that it can be conveniently performed without careful attention.

In addition, even if the filter fixing module for fixing the filter is not in a horizontal arrangement, the filter can be prevented from falling, so that the filter can be prevented from dropping when the filter is separated and withdrawn, so that the filter can be separated and withdrawn more stably. By allowing the filter to be separated and extracted using tweezers, there is an effect that the filter can be separated and extracted more conveniently and stably.

1 is a perspective view schematically showing the outer appearance of a filter holder device according to an embodiment of the present invention,
2 and 3 are views exemplarily showing an air flow state according to an operating method of a filter holder device according to an embodiment of the present invention;
4 is an enlarged view of a portion "A" of FIG.
5 is a plan view schematically showing the shape of a flow path formed on a lower guide plate of a holder case according to an embodiment of the present invention;
6 is an exploded perspective view schematically showing the configuration of a filter fixing module according to an embodiment of the present invention,
7 is a view for explaining a process of separating and withdrawing a filter from a filter fixing module according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to elements of each drawing, it should be noted that the same elements have the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a perspective view schematically showing an external appearance of a filter holder device according to an embodiment of the present invention, and FIGS. 2 and 3 are air flow states according to an operating method of the filter holder device according to an embodiment of the present invention. This is an exemplary diagram.

The filter holder device according to an embodiment of the present invention is a device formed to fix a filter in an inner space to collect fine particles, and to separate and extract the filter from the inner space after collecting the fine particles, and a holder case It is configured to include (100) and a filter fixing module (300).

The holder case 100 has a hollow cylindrical shape in which an accommodation space is formed, and is formed separately into an upper case 110 and a lower case 120, so that the upper case 110 and the lower case 120 can be separated from each other. It is configured in a form that is combined up and down. The upper case 110 is formed in a hollow cylindrical shape with an open bottom surface, and an inlet port 111 is formed to protrude upward so that the gas to be tested can flow into the upper surface. The lower case 120 is formed in a hollow cylindrical shape with an open top surface, and a discharge port 121 protrudes downward so that the gas to be tested can be discharged on the lower surface thereof. The gas to be tested is introduced into the inner space of the holder case 100 through the inlet port 111, passes through the inner space of the holder case 100, and discharged to the outside through the discharge port 121.

The filter fixing module 300 is formed so that the filter 200 for collecting fine particles is seated and fixed, and the seated and fixed filter 200 is disposed in a direction perpendicular to the flow direction of the test target gas in the inner space of the holder case 100 It is fixedly mounted inside the holder case 100 as possible. At this time, the filter fixing module 300 is configured to be pressed by the upper case 110 and fixed in position as the upper case 110 is coupled to the lower case 120 while being seated and supported on the lower case 120.

Therefore, the filter fixing module 300 is seated and supported on the upper end of the lower case 120 in a state where the upper case 110 and the lower case 120 are separated, and in this state, the upper case 110 is attached to the lower case 120. ), the filter fixing module 300 is pressed and fixed to the inner space of the holder case 100. In this state, as the test target gas passes through the inner space of the holder case 100, fine particles contained in the test target gas are collected by the filter 200 of the filter fixing module 300, and after the collection is completed, the upper case After separating 110 from the lower case 120 and separating the filter fixing module 300 from the lower case 120, the filter 200 is separated and withdrawn from the filter fixing module 300. After storing the separated and drawn filter 200 in this way in a separate case, the fine particles collected in the filter 200 in a laboratory or the like are analyzed.

At this time, a separate inlet hole 112 is formed in the upper side of the upper case 110 so that the gas to be tested can be introduced. The inlet hole 112 is configured to be opened and closed through a separate stopper 101. Of course, the inlet port 111 may also be opened and closed through a separate stopper 101.

According to this structure, the filter holder device according to an embodiment of the present invention is configured to selectively open one of the inlet port 111 and the inlet hole 112 so that the gas to be tested is introduced.

That is, the filter holder device according to an embodiment of the present invention opens the inlet port 111 formed on the upper surface of the holder case 100 and closes the inlet hole 112 formed on the side as shown in FIG. By opening the inlet hole 112 formed on the side of the holder case 100 and closing the inlet port 111 formed on the upper surface, unlike the gas to be tested can be introduced through the inlet port 111 on the upper surface, The gas to be tested may be introduced through the inlet hole 112 on the side. When the gas to be tested is introduced through the inlet hole 112 on the side, a separate connecting tube 102 may be inserted into the inlet hole 112 so that the gas to be tested is introduced.

In order to collect fine particles, a filter holder device is connected to a connection pipe that can induce the gas to be tested, so that the gas to be tested passes through the inner space of the holder case 100. At this time, the connection pipe line leading the gas to be tested is In many cases, it is not possible to change the arrangement direction due to restrictions of the installation space, and accordingly, if the inlet port 111 is formed only in one position, connect the connection pipe to the inlet port 111 due to the restriction of the installation space. It becomes difficult. In the filter holder device according to an embodiment of the present invention, by forming an inlet port 111 and an inlet hole 112 on the upper and side surfaces of the holder case 100, respectively, the connecting pipe is connected to the inlet port 111 according to the installation environment. And since it can be selectively connected to any one of the inlet hole 112, it is possible to perform the installation work more conveniently.

In addition, as shown in FIG. 2, when the gas to be tested is introduced through the inlet port 111 formed on the upper surface of the holder case 100, the gas to be tested is transferred to the holder case 100 by the flow rate of the gas to be tested. It does not diffuse into the internal space as a whole, but flows downward toward the discharge port 121 through the filter 200 along the central region. In this case, the collecting performance of the filter may be deteriorated, and the fine particles may be concentrated in the central region of the filter 200, making it difficult to analyze the fine particles and reducing the analysis accuracy.

In contrast, when the gas to be tested flows through the inlet hole 112 formed on the side of the holder case 100 as shown in FIG. 3, the gas to be tested is the internal space of the holder case 100 according to the side flow direction. It diffuses as a whole, and is discharged through the discharge port 121 after passing through the filter 200 in such a diffused state. In this case, the fine particles are evenly collected over the entire area of the filter 200, so that the analysis of the fine particles is easy and the analysis accuracy is improved.

Next, a more detailed look at the coupling structure of the filter fixing module 300 and the holder case 100.

As described above, the filter fixing module 300 is pressure-fixed as the upper case 110 is coupled in a state seated and supported on the lower case 120 as described above. In this case, the upper case 110 has a lower inner surface of the lower case ( It is combined with the lower case 120 in a form in contact with the outer surface of the upper end of 120).

More specifically, a coupling stepped portion 122 is formed at the upper end of the lower case 120 to protrude in the inward direction so that the diameter decreases, and the upper case 110 has an inner side of the coupling stepped portion 122 ) Is coupled to the lower case 120 in contact with the outer surface. The filter fixing module 300 is seated and supported on the upper end of the coupling stepped part 122.

At this time, in the interior of the upper case 110, a pressing protrusion 130 is formed to press the upper end of the filter fixing module 300 downward and fix the position while the upper case 110 is coupled to the lower case 120 do.

According to this configuration, when the upper case 110 is coupled while the filter fixing module 300 is seated and supported on the coupling step 122 of the lower case 120, the pressing protrusion 130 is the filter fixing module 300 Is pressed downward, and accordingly, the filter fixing module 300 is positioned in the inner space of the holder case 100.

On the other hand, the upper case 110 may be coupled to the lower case 120 by a simple fit and insert method, but may be coupled by a screw connection method for sealing coupling and a stable pressurizing function to the filter fixing module 300 . To this end, threads corresponding to each other are formed on the inner surface of the lower end portion of the upper case 110 and the outer surface of the coupling stepped portion 122, and may be screwed to each other through the threads.

Next, the configuration of the filter fixing module 300 will be described in more detail with reference to FIGS. 4 to 7.

FIG. 4 is an enlarged view of a portion “A” of FIG. 2, and FIG. 5 is a plan view schematically showing the shape of a flow path formed on a lower guide plate of a holder case according to an embodiment of the present invention, and FIG. An exploded perspective view schematically showing the configuration of a filter fixing module according to an embodiment of the present invention, and FIG. 7 is a view for explaining a process of separating and withdrawing a filter from the filter fixing module according to an embodiment of the present invention.

The filter fixing module 300 according to an embodiment of the present invention includes a filter support 310 and a centering pressing member 320.

The filter support 310 includes a disk-shaped seating portion 311 in which a plurality of gas flow holes 314 are formed so that the filter 200 is seated, and a side extension extending upwardly along the edge of the seating portion 311 It is configured to include a portion 312 and a support wing portion 313 that extends horizontally from an upper end of the side extension portion 312 in an outward direction to be seated and supported on an upper end of the coupling stepped portion 122 of the lower case 120.

The centering pressing member 320 is formed in a hollow cylindrical shape in which the outer surface is in contact with the inner surface of the side extension 312 and the filter support 310 presses downward the filter 200 seated on the seating portion 311 It is configured to include a filter pressing portion 321 inserted into the, and a support wing portion 322 horizontally extending outward from the upper end of the filter pressing portion 321 to be seated and supported on the upper surface of the support wing portion 313.

At this time, the pressing protrusion 130 of the upper case 110 is formed to press the upper surface of the support wing portion 322 of the centering pressing member 320.

According to this configuration, when the centering pressing member 320 is inserted into the filter support 310 while the filter 200 is seated on the seating portion 311 of the filter support 310, the filter 200 is It is pressed by 321 and fixed in position. At this time, since the edge portion of the filter 200 is uniformly pressed by the filter pressing unit 321, the filter 200 is aligned in position within the seating unit 311 and is pressed and fixed in a fixed position. As described above, when the filter 200 is pressed and fixed, the filter fixing module 300 is seated on the coupling step 122 of the lower case 120, and when the upper case 110 is coupled in this state, the pressing protrusion ( Since 130 presses the upper surface of the support wing portion 322 of the centering pressing member 320 downward, the filter fixing module 300 is not only fixed in position, but also the filter 200 is further pressed by the centering pressing member 320. Pressurized. Accordingly, the filter 200 is positioned inside the holder case 100 together with the filter fixing module 300.

Since a plurality of gas flow holes 314 are formed in the seating portion 311 of the filter support 310 on which the filter 200 is seated, as shown in FIG. 4, the inlet port 111 or the inlet hole 112 The test target gas introduced through the filter 200 passes through the filter 200 and then passes through the gas flow hole 314 and flows toward the discharge port 121. At this time, the gas flow hole 314 is formed to be uniformly distributed over the entire area of the seating part 311, and accordingly, the gas to be tested passes evenly through the entire area of the filter 200, so that the fine particles It is uniformly collected over the entire area of 200.

In this way, the lower case 120 has a separate lower part of the filter support 310 so that the flow of the test target gas that has passed through the filter 200 and the filter support 310 can be guided toward the center side toward the discharge port 121. The lower guide plate 140 may be disposed.

The lower guide plate 140 may be manufactured integrally with the lower case 120, but may be manufactured in a form that is separately coupled to the lower case 120. The lower guide plate 140 has a central flow hole 141 formed in the center to pass the test target gas, and a plurality of radial flow paths 142 formed in the radial direction so as to be connected to the center flow hole 141 on the upper surface of the lower guide plate 140 , A plurality of connection passages 143 formed in a circumferential direction to connect the plurality of radiation passages 141 may be formed in a concave recessed form.

Therefore, the gas to be tested passing through the filter 200 and the filter support 310 is guided toward the central flow hole 141 along the radiation flow path 142 and the connection flow path 143 of the lower guide plate 140, and It passes through the flow hole 141 and flows toward the discharge port 121. The flow of the gas to be tested is made more smoothly through the central flow hole 141 and the flow paths 142 and 143 formed in the lower guide plate 140.

Meanwhile, in the filter support 310, a tweezer insertion hole 315 is formed in an up-down direction from a lower end to an upper end, and the tweezer insertion hole 315 is formed in a shape in which the upper end is opened to the outside. That is, the tweezers insertion hole 315 is formed to be elongated in the vertical direction in the side extension 312 and the support wing 313 of the filter support 310, and the upper end penetrates the support wing part 313 to be opened to the outside. Is formed.

According to this configuration, the tweezers 10 are inserted into the tweezers insertion hole 315 while the centering pressing member 320 is separated from the filter support 310 as shown in FIG. 7(b), and the filter 200 Holding the filter 200 can be stably separated and withdrawn to the outside.

Looking in more detail at the separation and withdrawal process of the filter 200 performed after collecting fine particles, first, the upper case 110 is separated from the lower case 120 and the filter fixing module 300 is separated from the lower case 120 do. When the filter fixing module 300 is separated, the filter 200 is seated and fixed to the seating portion 311 of the filter support 310 as shown in FIG. 7A. At this time, in the process of separating the filter fixing module 300 from the lower case 120, even if the arrangement angle of the filter fixing module 300 is not horizontally but in an inclined state, the filter 200 is the centering pressing member 320 Since the pressurized state is maintained by the filter support 310, it is stably positioned within the filter support 310 without falling to the ground. In addition, since the side extension 312 extends upward along the edge of the seating portion 311 on which the filter 200 is seated, even if the centering pressing member 320 is separated as shown in FIG. 7B, The filter 200 does not easily fall from the filter support 310 and maintains a stable position. In this state, it may not be easy to separate and withdraw the filter 200 from the filter support 310 without contamination, but tweezers on the filter support 310 as described above for the convenience of the separation and withdrawal operation of the filter 200 An insertion hole 315 is formed. Through this, as shown in (b) of FIG. 7, by inserting the tweezers 10 into the tweezers insertion hole 315 to hold the filter 200, the filter 200 can be conveniently and stably separated and withdrawn.

On the other hand, when the tweezers insertion hole 315 is formed in the filter support 310, the gas to be tested does not pass through the filter 200 in the flow of the tweezers insertion hole 315 to flow to the discharge port 121. Therefore, in order to prevent this, the centering pressing member 320 is inserted protrusion long in the vertical direction on the outer circumferential surface of the filter pressing unit 321 so as to slide into the tweezer insertion hole 315 in the process of being inserted into the filter support 310 ( 323) is formed protruding.

In the process of inserting the centering pressure member 320 into the filter support 310 according to this structure, the insertion protrusion 323 blocks the tweezers insertion hole 315, as shown in FIG. 7A, so that the test Since the target gas does not pass through the tweezers insertion hole 315 but passes through the filter 200 and flows to the discharge port 121, it is possible to prevent deterioration of the fine particle collection performance and collection accuracy through the filter 200. I can.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

100: holder case
110: upper case
111: inlet port
112: inlet hole
120: lower case
121: discharge port
122: coupling stepped portion
130: pressure protrusion
140: lower guide plate
200: filter
300: filter fixing module
310: filter support
311: seat
312: side extension
313: support wing
314: gas flow hole
315: tweezers insertion hole
320: centering pressing member
321: filter pressurization part
322: support wing portion
323: insertion protrusion

Claims (10)

delete delete In the filter holder device formed so that the filter can be fixed in the inner space to collect fine particles, and the filter can be separated and withdrawn from the inner space after collecting the fine particles,
Separately formed into an upper case with an inlet port formed on the upper surface to allow the test target gas to flow in, and a lower case with an exhaust port formed on the lower surface to allow the test target gas to be discharged, and the upper case and the lower case are separated A holder case that is vertically coupled to each other; And
A filter fixing module mounted inside the holder case so that the filter for collecting fine particles is mounted and fixed, and the filter is disposed in a direction orthogonal to the flow direction of the gas to be tested in the internal space of the holder case
A separate inlet hole is formed on the side of the upper case, and one of the inlet port and the inlet hole is selectively opened to allow the gas to be tested to flow,
As the upper case is coupled to the lower case, the filter fixing module is formed to be pressed and fixed in position inside the holder case,
The upper case is formed in a hollow cylindrical shape with an open bottom surface,
The lower case is formed in a hollow cylindrical shape with an open top surface,
The upper case is coupled with the lower case in a form in which the inner surface of the lower part contacts the outer surface of the upper part of the lower case,
The filter fixing module is seated and supported on an upper end of the lower case, and the upper case has a pressing protrusion formed therein to fix the position by pressing the upper end of the filter fixing module downward while being coupled to the lower case,
The filter fixing module is
A disk-shaped seating portion in which a plurality of gas flow holes are formed so that the filter is seated, a side extension portion extending upward along an edge circumference of the seating portion, and the lower case horizontally extending outward from an upper end of the side extension portion. A filter support including a support wing portion seated and supported on an upper end of the filter; And
A filter pressurizing unit having an outer surface formed in a hollow cylindrical shape in contact with the inner surface of the side extension unit and inserted into the filter support to press the filter seated in the seating unit downward, and horizontally from the top of the filter pressurizing unit in an outward direction. Centering pressing member including a support wing portion extended and seated and supported on the upper surface of the support wing portion
Including, the pressing protrusion of the upper case presses the upper surface of the support wing portion of the centering pressing member,
In the filter support, a tweezer insertion hole is formed in a vertical direction from a lower end to an upper end, and the tweezer insertion hole is formed in a shape in which the upper end is open to the outside,
The centering pressing member is a filter holder device for collecting fine particles, characterized in that the insertion protrusion is formed to protrude in the vertical direction on the outer circumferential surface of the filter pressing unit so as to slide into the tweezers insertion hole while being inserted into the filter support.
The method of claim 3,
A coupling stepped part is formed at the upper end of the lower case in a form that is stepped so as to protrude in the inward direction to reduce the diameter,
The upper case is coupled to the lower case in a form in which the inner surface is in contact with the outer surface of the coupling stepped portion, and the filter fixing module is seated and supported on an upper end of the coupling stepped portion. .
The method of claim 4,
A filter holder device for collecting fine particles, characterized in that threads corresponding to each other are formed on an inner surface of the lower end of the upper case and an outer surface of the coupling stepped portion so that the upper case and the lower case are screwed to each other.
delete delete delete The method of claim 3,
In the lower case, a separate lower guide plate is disposed below the filter support so that the flow of the test target gas passing through the filter and the filter support can be guided toward the center toward the discharge port. Filter holder device for collection.
The method of claim 9,
A central flow hole is formed in the center of the lower guide plate to pass the gas to be tested, and a plurality of radiation flow paths formed in a radial direction so as to be connected to the center flow hole, and a plurality of the radiation flow paths on the upper surface of the lower guide plate A filter holder device for collecting fine particles, characterized in that a plurality of connection flow paths formed in a circumferential direction to connect the particles are formed in a concave recessed form.

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