KR102446176B1 - Air filter for vehicles - Google Patents

Abstract

The present invention relates to an air filter for a vehicle. More particularly, the present invention relates to an air filter made of biodegradable polymer and copper fiber. In the present invention, the air filter itself contains antibacterial substances derived from copper and natural products, thereby exhibiting an excellent antibacterial effect, and at the same time, being environmentally friendly, harmless to the human body, and including a biodegradable resin, so that it is characterized by being able to minimize problems of environmental pollution, such as the emission of microplastics and the harmful effects of residual plastics, which have been pointed out as problems in the conventional melt blown filter.

Description

Air filter for vehicles

The present invention relates to an air filter for a vehicle.

The vehicle is equipped with an air conditioning system to keep the interior of the vehicle comfortable by controlling the interior of the vehicle to an appropriate temperature and humidity when the interior temperature is high, such as in summer.

An air conditioner system of a vehicle is a vapor compression refrigeration cycle, and consists of main parts of a condenser, a compressor, an expansion valve, an evaporator, and a dryer. The refrigeration cycle is provided with a refrigerant gas injection port for filling or replenishing the refrigerant gas during use.

In the case of summer when the air conditioner is driven, when the vehicle is turned off or the air conditioner is stopped, the residual condensate is discharged through the condensate drain of the evaporator case. Even after the residual condensate is discharged through the condensate drain of the evaporator case, it remains condensed on the surface of the evaporator due to the surface tension. Since various molds and bacteria are propagated in the residual condensate remaining on the surface of the evaporator, if the air conditioner is operated again after that, mold and bacteria will enter the interior of the vehicle along with the air, giving the interior of the vehicle an unpleasant odor or moldy smell. There was a problem that caused

Although the filter member is contaminated by various kinds of bacteria or bacteria attached during use, it does not have a device capable of sterilizing the filter member, so that the service life of the filter member is shortened, or the air filtered by the filter member is not provided. There was a problem that the quality deteriorated.

Registered Patent 10-0546050 Patent Publication 10-2005-0111691 Patent Publication 10-2019-0054953 Public utility model 20-2016-0000998

An object of the present invention is to provide an air filter for a vehicle with improved antibacterial performance against bacteria or bacteria.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention includes a filter case 510 having an upper opening surface 502 and a lower opening surface 501 formed thereon; a filter member 530 disposed inside the filter case 510 and exposed to an upper opening surface 502 and a lower opening surface 501; It provides an air filter for a vehicle including; a support member 540 disposed along the outer surface of the filter member 530 to maintain the shape of the filter member 530 .

Specifically, in the vehicle air filter, the filter member 530 may form the valleys 531 and 532 in the horizontal direction, and for this purpose, the filter member 530 may be formed by bending the filter member 530 in the vertical direction. have.

In addition, in an embodiment of the present invention, the filter member 530 may be formed by mixing a synthetic resin and a metal thread, and may form conductivity through the metal thread. Furthermore, the metal thread of the filter member 530 may contain copper, and may attract dust during charging, and the effect of antibacterial, deodorizing, electromagnetic wave shielding, antistatic, thermal storage and various viruses due to copper is eliminated. can indicate In particular, in the case of coronavirus, it has been reported that the activity is maintained for up to 48 hours on the surface of stainless steel, glass, or plastic, but it has been reported that it is inactivated within 4 hours on the surface of copper.

Specifically, the synthetic resin included in the filter member 530 is prepared by mixing PLA and PCL to prepare a base resin, and then an extract obtained from a natural antibacterial material and PLGA resin are mixed to form a nonwoven fabric in a melt blown method. can mean

In the present invention, "PLA (Poly Lactic Acid)" means a biodegradable resin mainly made from plants such as corn and sugar cane, and is produced the most among eco-friendly (biodegradable) polymer compounds worldwide. This material is being produced by several companies around the world, such as Cargill-Dow Polymer, Chronopol, and Mitsui Chemicals in the US, and more than 1.5 million tons are being supplied worldwide. Polylactic acid (PLA) resin is being studied a lot in material engineering by adding substances that are not harmful to the human body or by itself, and is medically used as a scaffold in tissue engineering (Biomaterials. 2004 May;25(10):1901-9., Avd Exp Med Biol, 2003;534: 191-9., Ann N Y Acad Sci. 2002 Oct;974:556-64) It is a biodegradable resin that possesses several characteristics even from a commercial point of view for general use, not for special fields.

In the present invention, PLA resin may be directly manufactured or pre-manufactured and sold, and may be used regardless of the production company (Cargill Dow Polymers, Mitsui Chemical, Chronopol or Dhimadzu, etc.).

In addition, according to the experimental examples of the present invention, PLA may have a molecular weight of 5,000 to 500,000 Da, preferably about 80,000 to 90,000 Da, but is not limited thereto.

In the present invention, "PCL (Polycaprolactone)" means a semi-crystalline biodegradable thermoplastic polyester having a melting point of about 60 ℃, the production of thermoplastic resin polyurethane, drug delivery in the healthcare industry, wound treatment, suture, wound covering It is used in tapes, tissue engineering, orthopedics, and dental implants.

The PCL induces a transesterification reaction by alcohol decomposition during melt blending for the production of PLA and base mixed resin to form a copolymer, thereby reducing the disadvantages related to the physical properties of PLA, for example, low thermal stability, mechanical properties, etc. can play a role in improving it.

In the present invention, the PCL resin may be directly manufactured or pre-manufactured and sold. In addition, according to the experimental examples of the present invention, PCL may have a molecular weight of about 1,500 to 3,000 Da, but is not limited thereto.

In the present invention, "base mixed resin" means a mixed resin of PLA and PCL that is pre-mixed before mixing the PLGA resin containing the natural complex extract during the manufacturing process of the master medium chip.

The temperature for preparing the base mixed resin in the present invention may be 200 to 250 °C, preferably 200 to 230 °C, but is not limited thereto.

If it is less than the above range, the transesterification reaction of PLA and PCL may not be sufficient, so the degree of improvement of the physical properties of PLA may be low.

PLA and PCL included in the base mixed resin in the present invention may be included in a weight ratio of 2:0.8 to 2:1.5, preferably 2:1 to 2:1.2.

In the present invention, when PCL to PLA is included less than the weight ratio, the durability of the yarn and the filter manufactured therefrom may be weakened, and when PCL to PLA is included more than the weight ratio, the yarn and the filter manufactured therefrom As the hardness increases, cracks may occur, which may reduce the effectiveness of the filter.

According to embodiments of the present invention, PLA and PCL included in the base mixed resin may be included in a weight ratio of 2:1.1, but is not limited thereto.

In the present invention, the base mixed resin may further contain a biodegradable polymer material to supplement physical properties, for example, aliphatic polyester (AP), cellulose acetate (CA) and cellulose di acetate (CDA), polybutylene succinate (PBS). ), Polyester urethane (PEU) and Ployglycolic acid (PGA), polyhydroxyalkanoic acid (PHA), poly(3-hydroxybutyrate) (PHB), poly(3-hydroxyvalerate) (PHV) and pullulan (Pullulan) It may be one or more selected from the group consisting of, but is not limited thereto.

In the present invention, "PLGA (polylactide-co-glycolide)" is a random copolymer of lactide (LA) and glycolide (GA). It refers to a bioplastic with characteristics such as biodegradability, biocompatibility, structural stability, and low toxicity. , are mainly used as medical polymers such as drug delivery systems and implants.

In the present invention, PLGA can form an outer wall for the natural complex extract, and can serve to minimize the denaturation of the natural complex extract during the time that PLGA is melted in the production of master batch chips.

In the present invention, the PLGA may have a molecular weight of 4,000 Da to 75,000 Da, preferably 50,000 to 75,000 Da, but is not limited thereto.

In the present invention, the PLGA may have a monomer molar ratio of lactide and glycolide of 90:10 to 50:50, preferably 80:20, but is not limited thereto.

In the present invention, in the PLGA, an end group may be an ester (neutral charge) or a carboxylic acid (negative charge).

In the present invention, PLGA can be directly manufactured or purchased commercially available products can be used. Examples of commercially available products include 10P001 (50:50) from PCAS' Expansorb ^® family; 10P002 (75:25); 10P003 (75:25); 10P007 (90:10); 10P008 (85:15); 10P009 (85:15E); 10P010(65:35E); 10P016(50:50E); 10P017 (50:50); 10P019(50:50E); 10P020 (85:15); 10P022(50:50); 10P023 (90:10); 10P024(50:50); 10P025 (90:10), RG 502 (50:50) from the Resomer ^® range from Aldrich ^® Evonik Rohm Pharma GmbH; RG 502H (50:50); RG503 (50:50); RG 503H (50:50); RG 504 (50:50); RG 504H (50:50); RG 505 (50:50); RG653H (65:35); RG 752H (75:25); There is the RG 756S (75:25). Also PDLG 7502 (75:25) from Purac Biomaterials' Purasorb ^® family; PDLG 7502A (75:25); PDLG7507 (75:25); PDLG 5002 (50:50); PDLG 5002A (50:50); PDLG 5004 (50:50); PDLG5004A (50:50); PDLG 5010 (50:50), PLGA-7505 (75:25) from Wako Pure Chemical Industries; PLGA-7510 (75:25); PLGA-7515 (75:25); PLGA-7520 (75:25); PLGA-5005 (50:50); PLGA-5010 (50:50); PLGA-5015 (50:50).

In addition, in the present invention, the extract obtained from the natural antibacterial material may mean an extract obtained from hwangchil tree, duchung tree, bongchil and frankincense tree.

In the present invention, "extract" means the result of extraction using an appropriate extraction solvent, and the extract is an extract obtained by extraction, a diluted or concentrated solution of the extract, a dried product obtained by drying the extract, a prepared or purified product thereof, or fractions.

In the present invention, "natural complex extract" refers to an extract extracted through a manufacturing process in a mixture state in which the natural raw materials of each extract are mixed at the same time.

In the present invention, the natural complex extract may include extracts from Hwangchil tree, Duchung tree, and Hobak tree.

In the present invention, "Hwangchil tree (Dendropanax morbifera)" is an evergreen tree belonging to the Araliaceae family, and it can be seen in some island regions of the southern coast of our country. .

In the present invention, "Eucommia ulmoides oliver" is a deciduous tree belonging to the Eucommia family, the leaves are alternately oval, and the fruit is cut into a flat long circle to produce a rubbery viscous thread, and the dried bark is used as herbal medicine. . The bark of the duchung tree is called duchung, and the young leaves are called cotton.

In the present invention, "Boswellia Carterii" is a tree of the olivine family, and the origin is Somalia, which is also a region pointing to the horns of Oman and Yemen and adjacent Africa in the southern tip of the Arabian Peninsula. Frankincense, the gin of the frankincense tree, is used for the purpose of making incense or perfume, and is also known to be very useful in treating arthritis.

In the present invention, "crushing" may mean crushing an object of a certain size, but is not limited thereto, and may mean any act of reducing the size of an object.

According to embodiments of the present invention, the extracts of hwangchil tree, cypress tree and frankincense tree extract for preparing the natural complex extract are pulverized and evenly mixed in a dried form and can be extracted through an extraction method under certain conditions, but , but not limited thereto.

The support member 540 is a synthetic resin and may form non-conductivity.

The support member 540 may insulate the filter case 510 and the filter member 530 made of synthetic resin.

The air filter according to the present invention has one or more of the following effects.

First, in the present invention, since the verb is disposed inside the filter assembly, there is an advantage in that the antibacterial performance against bacteria or bacteria is high.

Second, in the present invention, an antibacterial material derived from a natural product is contained in the filter member itself constituting the filter assembly, thereby exhibiting an excellent antibacterial effect, and at the same time being environmentally friendly and harmless to the human body.

Third, since the synthetic resin constituting the filter member contains the biodegradable resin, it is possible to minimize the problem of environmental pollution such as the discharge of microplastics due to their disposal and the harmful effects of the remaining plastics.

1 is an exploded perspective view of a vehicle blower according to a first embodiment of the present invention.
FIG. 2 is a side cross-sectional view of FIG. 1 .
FIG. 3 is an exemplary operation view of FIG. 2 .
FIG. 4 is a plan view of the filter assembly shown in FIG. 1 .
5 is a partial perspective view of the filter member shown in FIG.
FIG. 6 is a partial cross-sectional view taken along line AA shown in FIG. 4 .

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a vehicle blower according to a first embodiment of the present invention, FIG. 2 is a cross-sectional side view of FIG. 1, FIG. 3 is an exemplary operation view of FIG. 2, and FIG. 4 is the filter shown in FIG. It is a plan view of the assembly, FIG. 5 is a partial perspective view of the filter member shown in FIG. 4 , and FIG. 6 is a partial cross-sectional view taken along line A-A shown in FIG. 4 .

The vehicle blower 100 according to this embodiment is assembled to the blowing case 200, the filter assembly 500 detachably assembled to the blowing case 200, and the blowing case 200, and the It includes a blower 140 for flowing the air inside the blowing case 200.

The blower case 200 is installed in a vehicle.

The blower case 200 includes an outdoor air intake 110 through which outside air is introduced, an inside air intake 120 through which vehicle indoor air is introduced, an insertion port 150 into which the filter assembly 500 is inserted, and the blower ( 140), a discharge duct 160 through which the air inside the blower case 200 is discharged, and the blower case 200 are rotatably disposed inside the air inlet 110 and the inside suction port 120. It includes an inlet door 130 that selectively opens and closes.

The bet suction port 120 is disposed on the upper side of the insertion port 150 .

The insertion hole 150 is disposed toward the interior of the vehicle.

The insertion hole 150 may be disposed in a horizontal direction, and the filter assembly 500 may be detachably inserted into the insertion hole 150 .

The filter assembly 500 may be inserted from the inside of the vehicle.

The intake door 130 may be rotated about the door shaft 131 . At least a portion of the inlet inlet 120 or the outdoor air inlet 110 may be closed or opened by the rotation of the inlet door 130 .

The door shaft 131 connects the intake door 130 and the blower case 200 .

The inlet door 130 is disposed above the filter assembly 500 .

The outdoor air inlet 110 and the internal air inlet 120 are disposed on the upper side of the filter assembly 500 .

The blower 140 is disposed below the filter assembly 500 .

When the blower 140 is operated, the air of the outdoor air inlet 110 or the indoor air inlet 120 flows through the filter assembly 500 to the blower 140, and the blower 140 is the discharge Air may flow into the duct 160 .

The filter assembly 500 may filter and sterilize the air flowing into the blower 140 .

A filter support part 250 communicating with the insertion hole 150 and supporting the filter assembly 500 may be further disposed inside the blowing case 200 .

The filter support part 250 supports the inserted filter assembly 500 , and the filter assembly 500 may slide horizontally along the filter support part 250 .

The filter assembly 500 is disposed above the blower 140 . The filter assembly 500 may filter foreign substances from the air sucked through the outdoor air inlet 110 or the indoor air inlet 120 .

The filter assembly 500 covers the entire filter support part 250 , and the edge of the filter assembly 500 is in close contact with the blowing case 200 .

The filter assembly 500 is detachably assembled from the filter support unit 250 .

The inside of the blowing case 200 may be divided into upper and lower sides by the filter assembly 500 . The outdoor air intake 110 and the indoor air intake 120 are disposed on the upper side of the filter assembly 500, and the blower 140 is disposed on the lower side.

The discharge duct 160 may communicate with a lower side of the filter assembly 500 .

In this embodiment, the filter assembly 500 is disposed on the upper side of the blower 140 , slides in the horizontal direction, and is supported by the filter support unit 250 .

The filter assembly 500 includes a filter case 510 having an upper opening surface 502 and a lower opening surface 501 formed therein, and disposed inside the filter case 510, an upper opening surface 502 and a lower opening surface. It includes a filter member 530 exposed as 501 and a support member 540 disposed along the outer surface of the filter member 530 to maintain the shape of the filter member 530 .

The filter case 510 is formed in an area that can cover the entire filter support unit 250 .

The filter support part 250 includes a lower support part 252 for supporting a lower portion of the filter case 510 and an upper support part 254 for supporting an upper part of the filter case 510 .

The lower support part 252 is formed to protrude further inward from the inner surface of the blowing case 200 .

The lower support part 252 may be arranged to extend along the inner surface of the blowing case 200, and guide the flowing air to the filter assembly 500, thereby minimizing the leakage of the air flowing through it. can

The upper support part 254 is formed to protrude further inward from the inner surface of the blowing case 200 .

The upper support part 254 may be arranged to extend along the inner surface of the blowing case 200, and guide the flowing air to the filter assembly 500, thereby minimizing the leakage of the air flowing through it. can

The lower support part 252 and the upper support part 254 are vertically spaced apart from each other, and the insertion part 150 is disposed outside the lower support part 252 and the upper support part 254 , and the lower support part 252 . ) and the upper support part 254 , the filter assembly 500 may be inserted or withdrawn.

When viewed from the top view, the filter case 510 has a rectangular shape as a whole. Unlike the present embodiment, the shape of the filter case 510 may be formed in a circular or other shape.

The upper opening surface 502 is formed on most of the upper side surfaces of the filter case 510 , and the lower opening surface 501 is formed on most of the lower side surfaces of the filter case 510 .

A lower edge 513 is formed on the edge of the lower opening surface 501 , and an upper edge 511 is formed on the edge of the upper opening surface 502 .

The filter member 530 is formed of a material having a smaller void than the pre-filter 520 . The filter member 530 filters the air filtered by the pre-filter 520 again.

In this embodiment, the filter member 530 may be a HEPA filter. Unlike the present embodiment, a filter in which the filter member 530 is made of a nonwoven fabric may be used.

The filter member 530 forms a valley 531 and a mountain 532 in the horizontal direction.

In order to form the valleys 531 and the mountains 532 , the filter member 530 may be bent in the vertical direction.

The filter member 530 includes a first filter inclined part 533 that is inclined in the vertical direction, is connected to the first filter inclined part 533 , and is disposed to cross the first filter inclined part 533 . It includes a second filter inclined portion (534).

The mountain 532 is formed in the upper bent portion of the first filter inclined portion 533 and the second filter inclined portion 534 , and the valley 531 is formed in the lower bent portion.

A plurality of the first filter inclined portion 533 and the second filter inclined portion 534 may be respectively disposed. The first filter inclined portions 533 are generally inclined in the same direction, and the second filter inclined portions 534 are also inclined in substantially the same direction.

The support member 540 may be elongated along the upper side surface 530a and the lower side surface 530b of the filter member 530 . In the support member 540 , the first filter inclined portion 533 , the valley 531 , the second filter inclined portion 534 , and the mountain 532 connect the upper surface thereof.

When it is necessary to separate the support member 540 , the first support member 541 is called the first support member 541 that is disposed on the lower surface 530b of the filter member 530 , and is disposed on the upper surface 530a of the filter member 530 . This is referred to as a second support member 542 .

The first support member 541 may be in close contact with the lower surface of the upper edge 511 , and the second support member 542 may be in close contact with the upper surface of the lower edge 513 .

The filter member 530 may be formed by mixing synthetic resin and metal yarn.

The filter member 530 may form conductivity through a metal thread.

The metal thread of the filter member 530 may include copper, and may attract dust during charging.

The support member 540 is a synthetic resin and may form non-conductivity.

The support member 540 may insulate the filter case 510 and the filter member 530 made of synthetic resin.

Example 1. Preparation of natural complex extract

Hwangchil tree (stem), cypress tree (bark), and frankincense tree (bark) were washed cleanly, dried and pulverized to 1 to 3 cm through a grinder, and mixed in a weight ratio of 2:3:1. mixed evenly. 10 L of 80% (v/v) ethanol was added to 1 kg of the mixture, and the mixture was extracted at 60 to 80° C. for 8 hours. Thereafter, the obtained extract was filtered, the filtrate and the residue were separated, and the filtrate (the first filtrate) was separately stored. Then, purified water is added to the separated residue, and ultrasonication is performed while continuously stirring at 60 to 80° C. for 8 hours using an ultrasonic extractor, and the sonicated extract is filtered to obtain a filtrate (second filtrate) and It was isolated as a residue. Then, the first filtrate and the second filtrate were mixed, concentrated under reduced pressure, and then freeze-dried to prepare a natural complex extract.

Example 2. Preparation of PLGA resin containing natural complex extract

The prepared natural complex extract and PLGA (manufacturer: Purac Biomaterials, PLA:PGA=85:15, molecular weight: 50,000 to 75,000 Da) were mixed in a weight ratio of 1:8, and then dissolved in DCM (dichloromethane), and the resulting solution was added to 1% PVA aqueous solution, followed by stirring. Thereafter, DCM was evaporated with a magnetic stirrer and PLGA was solidified to prepare PLGA containing a natural complex extract.

Example 3. Manufacture of filter member

PLA resin (manufacturer: Shimadzu, molecular weight: 80,000-90,000 Da) and PCL resin (manufacturer: Union Carbide, molecular weight: 1,500 to 3,000 Da) in a weight ratio of 2:1.1 (PLA:PCL) into the extruder, 200 to 230 It was melted by heating to a temperature of °C. Then, after cooling the molten PLA and PCL mixed resin (referred to as "base resin" in this specification) to a temperature of 150 to 180° C. through a cooler, the PLGA resin containing the prepared natural extract is used as a base mixed resin 20 parts by weight of PLGA resin containing a natural complex extract was mixed with respect to 100 parts by weight, and stirred for about 2 minutes. Thereafter, the stirred mixture is extruded to produce a microfiber yarn, and 7 parts by weight of the fine copper fiber is pressed against 93 parts by weight of the microfiber yarn to prepare a melt blown type filter member of the present invention did.

Comparative Examples 1 and 2. Preparation of filters excluding copper fibers and natural products

It was prepared in the same manner as in Example 3, but Comparative Example 1 was prepared without copper fiber, and Comparative Example 2 was prepared without mixing a natural extract with PGLA.

Experimental Example 1. Antibacterial and deodorizing effect confirmation experiment

An experiment was conducted to compare the antibacterial, moisture absorption and deodorizing effects of the air filter including the filter member prepared in Example 3 and Comparative Examples 1 and 2.

Whether to maintain the antimicrobial properties of the present invention was compared by KSK-0693. Specifically, the filters of Example 1 and Comparative Examples 1 and 2 that were sterilized at 121° C. in a high-temperature autoclave were placed on the surface of the filter, and Staphylococcus aureus to be measured on the surface of the filter. 1 x 10 ⁷ pieces were inoculated and cultured for 18 hours, and the reduction rate of bacteriostatic bacteria was measured in % compared to standard comedones, and is shown in Table 1 below.

In addition, for comparison of the deodorizing power of the filters of the present invention, the filters of Example 1 and Comparative Example were put in a sealed container, and the same amount of manure collected from the same individual was put into each container, and the ammonia concentration after 60 minutes had elapsed. The degree of decrease and the amount of change in humidity were measured and shown in Table 1 below.

division Antibacterial (%) Deodorization rate (%) Example 1 99.9 96 Comparative Example 1 89.9 79 Comparative Example 2 76.5 75

As shown in Table 1, it was confirmed that the filter of Example 1 of the present invention exhibited excellent effects in all items. In particular, it was confirmed that the filter of the present invention exhibited remarkably excellent antibacterial properties and deodorization rate even though only eco-friendly and biodegradable materials derived from natural products were used.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments, but may be manufactured in various different forms, and those of ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

100: blower 110: outdoor air intake
120: bet inlet 130: door
140: blower 150: insertion hole
500: filter assembly 510: filter case
530: filter member 540: support member

Claims (5)

a filter case 510 having an upper opening surface 502 and a lower opening surface 501 formed thereon;
a filter member 530 disposed inside the filter case 510 and exposed to an upper opening surface 502 and a lower opening surface 501;
and a support member 540 disposed along the outer surface of the filter member 530 to maintain the shape of the filter member 530;
In the filter case 510, a lower edge 513 is formed on the edge of the lower opening surface 501, and an upper edge 511 is formed on the edge of the upper opening surface 502,
The filter member 530 is disposed between the upper edge 511 and the lower edge 513,
The filter member 530 may include: a first filter inclined portion 533 disposed to be inclined in the vertical direction; a second filter inclined part 534 connected to the first filter inclined part 533 and disposed to cross the first filter inclined part 533; a mountain 532 formed in the upper bent portion of the first filter inclined portion 533 and the second filter inclined portion 534; Containing;
The support member 540,
a first support member 541 disposed on the lower surface 530b of the filter member 530;
a second support member 542 disposed on the upper surface 530a of the filter member 530;
The first support member 541 connects the upper surface of the first filter inclined portion 533, the valley 531, the second filter inclined portion 534 and the mountain 532,
The second support member 542 connects the lower surface of the first filter inclined part 533, the valley 531, the second filter inclined part 534 and the mountain 532,
The filter member 530 is formed by mixing synthetic resin and metal yarn to form conductivity,
The support member 540 is formed of a non-conductive synthetic resin material, and insulates the filter case 510 and the filter member 530,
The synthetic resin included in the filter member 530 is mixed with PLA and PCL to prepare a base resin, and then an extract obtained from a natural antibacterial material and PLGA resin are mixed to form a nonwoven fabric in a melt blown method,
The natural antibacterial material is
Hwangchil tree (stem), cypress tree (bark), and frankincense tree (bark) were washed cleanly, dried and pulverized to 1 to 3 cm through a grinder, and mixed in a weight ratio of 2:3:1. Mix evenly to prepare a mixture, add 10 L of 80% (v/v) ethanol to 1 kg of the mixture and extract at 60 to 80° C. for 8 hours to prepare an extract,
After filtering the obtained extract and separating the filtrate and the residue, the filtrate (first filtrate) is separately stored, purified water is added to the separated residue, and 60 to 80 using an ultrasonic extractor Sonicated while continuously stirring at ℃ for 8 hours, the sonicated extract is filtered to separate into a filtrate (second filtrate) and a residue, and after mixing the first filtrate and the second filtrate, After concentration under reduced pressure, freeze-drying to prepare the natural complex extract,
The PLGA is
The prepared natural complex extract and PLGA were mixed in a weight ratio of 1:8, dissolved in DCM, and the obtained solution was added to a 1% PVA aqueous solution, stirred, and evaporated with a magnetic stirrer to evaporate DCM and solidify PLGA. To prepare the PLGA containing the natural complex extract,
The mixed resin of PLA and PCL, which is pre-mixed before mixing the PLGA resin containing the natural complex extract, is called the base mixed resin,
The filter member 530,
The PLA resin and the PCL resin are put into an extruder at a weight ratio of 2:1.1 (PLA:PCL), and melted by heating at a temperature of 200 to 230° C. to form the base resin,
After cooling the base resin to a temperature of 150 to 180° C. through a cooler, the PLGA resin containing the natural complex extract prepared above was added to 100 parts by weight of the base mixed resin compared to 100 parts by weight of the PLGA resin containing the natural complex extract. mix by part and stir for about 2 minutes,
Thereafter, the stirred mixture is extruded to produce a microfiber yarn, and 7 parts by weight of fine copper fibers are pressed against 93 parts by weight of the microfiber yarn to produce a melt blown type vehicle air filter.
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