阅读说明：本技术 一种低噪音冶金用pp风机 (Metallurgical PP fan of using of low noise ) 是由 成雄志 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种低噪音冶金用PP风机,包括电动机,所述电动机一侧设有叶轮,且电动机外部罩接有外壳,所述外壳底部外壁固定连接有基座,且外壳一侧设有控制器,所述外壳两端外壁均设有散热箱,且散热箱内部均设有散热风扇,所述外壳顶部内壁设有吸热箱,且外壳顶部外壁固定连接有冷凝箱和抽气箱,所述抽气箱底部内壁设有气囊,且抽气箱内壁固定连接有固定板,所述冷凝箱一侧设有连接管,且连接管另一端与气囊相连,所述连接管内部设有压力阀,所述吸热箱顶部设有蒸发罩,且蒸发罩顶端与气囊底部相连。本发明能够根据外壳内电动机产生的热量自主调调节两个散热箱内散热风扇的运行功率,无需人工操作调控,大大节约时间并节能环保。(The invention discloses a low-noise PP (polypropylene) fan for metallurgy, which comprises a motor, wherein an impeller is arranged on one side of the motor, a shell covers the outside of the motor, a base is fixedly connected to the outer wall of the bottom of the shell, a controller is arranged on one side of the shell, heat dissipation boxes are respectively arranged on the outer walls of two ends of the shell, heat dissipation fans are respectively arranged in the heat dissipation boxes, a heat absorption box is arranged on the inner wall of the top of the shell, a condensation box and an air exhaust box are fixedly connected to the outer wall of the top of the shell, an air bag is arranged on the inner wall of the bottom of the air exhaust box, a fixing plate is fixedly connected to the inner wall of the air exhaust box, a connecting pipe is arranged on one side of the condensation box, the other end of the connecting pipe is connected with the air bag, a pressure valve is arranged in the connecting pipe, an evaporation cover is arranged on the top of the heat absorption box, and the top end of the evaporation cover is connected with the bottom of the air bag. The invention can automatically adjust the operating power of the heat dissipation fans in the two heat dissipation boxes according to the heat generated by the motor in the shell, does not need manual operation adjustment and control, and greatly saves time, saves energy and is environment-friendly.)

1. A low-noise PP fan for metallurgy comprises a motor (7), wherein an impeller (4) is arranged on one side of the motor (7), a shell (2) is covered outside the motor (7), a base (1) is fixedly connected to the outer wall of the bottom of the shell (2), a controller is arranged on one side of the shell (2), heat dissipation boxes (6) are arranged on the outer walls of two ends of the shell (2), and heat dissipation fans are arranged inside the heat dissipation boxes (6), and the low-noise PP fan is characterized in that a heat absorption box (13) is arranged on the inner wall of the top of the shell (2), a condensation box (8) and an air exhaust box (11) are fixedly connected to the outer wall of the top of the shell (2), an air bag (14) is arranged on the inner wall of the bottom of the air exhaust box (11), a fixing plate (18) is fixedly connected to the inner wall of the air exhaust box (11), a connecting pipe (9) is arranged on one side of the condensation box (8), and the other end of the connecting pipe (9) is connected with the air bag (14), the pressure valve is arranged inside the connecting pipe (9), the evaporation cover (21) is arranged at the top of the heat absorption box (13), the top end of the evaporation cover (21) is connected with the bottom of the air bag (14), the T-shaped plate (15) is connected to the top of the fixing plate (18) in a sliding mode, the vibration frequency detector (17) is arranged in the fixing plate (18), a first connecting spring (16) is arranged between the T-shaped plate (15) and the fixing plate (18), the impact block is arranged on the outer wall of one side of the top of the T-shaped plate (15), the controller is electrically connected with the heat dissipation fan and the vibration frequency detector (17) respectively, and heated volatile liquid media (20) are contained inside the heat absorption box (13).

2. The metallurgical PP fan with the good heat dissipation effect according to claim 1, wherein an air exhaust pipe (10) is arranged on the outer wall of one side of the air exhaust box (11), the air exhaust pipe (10) penetrates through the shell (2) and is connected with an air suction cover (12), exhaust pipes (3) are arranged on the outer walls of two ends of the air exhaust box (11), one-way valves are arranged inside the exhaust pipes (3) and the air exhaust pipe (10), and a piston plate (19) is fixedly connected to the outer wall of the top of the T-shaped plate (15).

3. The metallurgical PP fan with the good heat dissipation effect according to claim 1, wherein the outer wall of one side of the heat dissipation box (6) is provided with a protective screen (5), the inner wall of the top of the heat dissipation box (6) is provided with a sliding groove (24), and the inner wall of the sliding groove (24) is connected with a filter screen (26) in a sliding manner.

4. The metallurgical PP fan with good heat dissipation effect according to claim 3, wherein an installation box (22) is fixedly connected to the inner wall of one side of the top of the heat dissipation box (6), the outer wall of one end of the installation box (22) is connected with one end of the exhaust pipe (3), a wind gathering arc-shaped plate (29) is connected to the inner wall of the installation box (22) in a sliding mode, and an elastic rope (28) is arranged between the wind gathering arc-shaped plate (29) and the inner wall of the installation box (22).

5. The metallurgical PP fan with the good heat dissipation effect according to claim 4, wherein a telescopic column (31) is connected to one side of the installation box (22) in a sliding mode, a second connecting spring (32) is arranged between the telescopic column (31) and the inner wall of the installation box (22), a sliding plate (30) is fixedly connected to the outer wall of one side of the telescopic column (31), and a plurality of vent holes (33) are formed in the outer wall of the bottom of the installation box (22).

6. The PP blower with the good heat dissipation effect for metallurgy according to claim 5, wherein one end of the telescopic column (31) is hinged to the outer wall of one side of the top of the filter screen (26), the bottom end of the filter screen (26) is hinged to the inner wall of the bottom of the heat dissipation box (6), a garbage can (27) is arranged below the filter screen (26), and the garbage can (27) is fixedly connected to the outer wall of the bottom of the heat dissipation box (6).

7. The PP blower with good heat dissipation effect for metallurgy according to claim 5, wherein the same gas collection box (23) is covered outside the plurality of vent holes (33), a telescopic pipe (25) is arranged on the outer wall of one side of the gas collection box (23), and one end of the telescopic pipe (25) penetrates through the filter screen (26) and is connected with the injection box (36).

8. The PP blower with the good heat dissipation effect for metallurgy according to claim 7, wherein the outer wall of the bottom of the injection box (36) is provided with a plurality of injection holes (35), a guide plate (34) is arranged below the injection holes (35), and the guide plate (34) is hinged with the injection box (36).

9. The metallurgical PP fan with the good heat dissipation effect according to claim 8, wherein two arc-shaped columns (37) are fixedly connected to the outer wall of one side of the injection box (36), an installation groove (41) is formed in the arc-shaped column (37), an electromagnet (40) is arranged on the inner wall of the top of the installation groove (41), an arc-shaped column II (38) is slidably connected to the inner wall of the bottom of the installation groove (41), a magnetic plate (42) is fixedly connected to the outer wall of the top of the arc-shaped column II (38), and a connecting spring III (39) is arranged between the electromagnet (40) and the magnetic plate (42).

Technical Field

The invention relates to the technical field of metallurgy, in particular to a low-noise PP fan for metallurgy.

Background

The environmental noise pollution is the phenomenon that the generated environmental noise exceeds the national environmental noise emission standard and interferes with normal life, work and study of other people. Environmental noise pollution is an energy pollution, and like other industrial pollution, is a nuisance that harms the human environment.

In the metallurgical industry, various types of fans are widely applied to the ferrous metallurgy industry by people, are key equipment in main production process processes of coking, sintering, iron making, steel rolling and the like, and are used in large quantities. The use of fan can produce a large amount of noises, promotes the noise that radiating efficiency helps reducing the fan and produce, but at the heat dissipation in-process, needs staff's manual adjustment radiator fan's operating power, complex operation, and the radiating efficiency is low.

In view of the above, the present invention provides a low-noise metallurgical PP blower to solve the above problems in the prior art.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a low-noise PP fan for metallurgy.

In order to achieve the purpose, the invention adopts the following technical scheme:

a low-noise PP draught fan for metallurgy comprises a motor, wherein an impeller is arranged on one side of the motor, a shell is covered outside the motor, a base is fixedly connected to the outer wall of the bottom of the shell, a controller is arranged on one side of the shell, heat dissipation boxes are arranged on the outer walls of two ends of the shell, heat dissipation fans are arranged inside the heat dissipation boxes, a heat absorption box is arranged on the inner wall of the top of the shell, a condensation box and an air extraction box are fixedly connected to the outer wall of the top of the shell, an air bag is arranged on the inner wall of the bottom of the air extraction box, a fixing plate is fixedly connected to the inner wall of the air extraction box, a connecting pipe is arranged on one side of the condensation box, the other end of the connecting pipe is connected with the air bag, a pressure valve is arranged inside the connecting pipe, an evaporation cover is arranged on the top of the heat absorption box, the top end of the evaporation cover is connected with the bottom of the air bag, a T-shaped plate is slidably connected to the top of the fixing plate, and a vibration frequency detector is arranged in the fixing plate, be equipped with connecting spring one between T template and the fixed plate, and T template top one side outer wall is equipped with the striking piece, the controller links to each other with radiator fan, vibration frequency detector electrical property respectively, the inside volatile liquid medium that is heated that holds of heat absorption incasement portion.

Further, the outer wall of one side of the air exhaust box is provided with an air exhaust pipe, the air exhaust pipe penetrates through the shell and is connected with an air suction cover, the outer walls of the two ends of the air exhaust box are provided with exhaust pipes, one-way valves are arranged inside the exhaust pipes and the air exhaust pipe, and the outer wall of the top of the T-shaped plate is fixedly connected with a piston plate.

Further, the outer wall of one side of the heat dissipation box is provided with a protective net, the inner wall of the top of the heat dissipation box is provided with a sliding groove, and the inner wall of the sliding groove is connected with a filter screen in a sliding mode.

Further, the inner wall fixedly connected with install bin of heat dissipation roof portion one side, and install bin one end outer wall is connected with blast pipe one end, install bin inner wall sliding connection has the wind-gathering arc, and gathers and be equipped with the elasticity rope between wind-gathering arc and the install bin inner wall.

Furthermore, one side of the installation box is slidably connected with a telescopic column, a second connecting spring is arranged between the telescopic column and the inner wall of the installation box, a sliding plate is fixedly connected to the outer wall of one side of the telescopic column, and a plurality of air holes are formed in the outer wall of the bottom of the installation box.

Further, flexible post one end articulates in filter screen top one side outer wall, and the filter screen bottom articulates in heat dissipation bottom of the case portion inner wall, the filter screen below is equipped with the dustbin, and dustbin fixed connection is in heat dissipation bottom of the case portion outer wall.

Furthermore, the outer part of the plurality of air holes is covered with the same gas collecting box, the outer wall of one side of the gas collecting box is provided with a telescopic pipe, and one end of the telescopic pipe penetrates through the filter screen and is connected with an injection box.

Furthermore, a plurality of jet holes are formed in the outer wall of the bottom of the jet box, a guide plate is arranged below the jet holes, and the guide plate is hinged with the jet box.

Further, two arc post I of injection case one side outer wall fixedly connected with, an inside mounting groove that is equipped with of arc post, and mounting groove top inner wall is equipped with the electro-magnet, mounting groove bottom inner wall sliding connection has arc post two, and two top outer wall fixedly connected with magnetic sheet of arc post, be equipped with connecting spring three between electro-magnet and the magnetic sheet.

Compared with the prior art, the invention has the beneficial effects that:

in the invention, when the PP fan operates and works, the motor in the shell emits heat, at the same time, the heat-radiating fan in the heat-radiating box operates and works to radiate the heat, the heated volatile liquid medium in the heat-absorbing box is heated, gasified and volatilized to enter the air bag through the evaporation cover, so that the air bag expands, the T-shaped plate is pushed to move upwards in the expansion process of the air bag, the impact block impacts the fixed plate, when the air pressure in the air bag reaches the threshold value of the pressure valve in the connecting pipe, the pressure valve is opened, so that the gas in the air bag enters the condensing box through the connecting pipe, finally the condensed liquid flows into the heat-absorbing box, the circulation is repeated, if the heat in the shell is not timely removed, the volatilization speed of the liquid medium is increased, so that the speed of the impact block on the T-shaped plate impacting the fixed plate is increased by the expansion of the air bag, and the vibration frequency detector detects the impact frequency, and the detected data signals are transmitted to the controller, so that the controller adjusts the operating power of the cooling fan according to the received impact frequency, manual operation regulation and control are not needed, the cooling efficiency is greatly improved, and the noise is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a low-noise PP blower for metallurgy according to the present invention;

FIG. 2 is a schematic cross-sectional view of a casing of a low-noise PP fan for metallurgy according to the present invention;

FIG. 3 is a schematic cross-sectional view of an exhaust box of a low-noise PP blower for metallurgy according to the present invention;

FIG. 4 is a schematic cross-sectional view of a heat absorption box of a low-noise PP fan for metallurgy according to the present invention;

FIG. 5 is a schematic cross-sectional view of a part of a heat dissipation box of a low-noise PP fan for metallurgy according to the present invention;

FIG. 6 is a schematic structural view of a low-noise mounting box of a PP fan for metallurgy according to the present invention;

FIG. 7 is an enlarged schematic view of the structure at the position A of the low-noise metallurgical PP fan provided by the invention;

fig. 8 is a schematic cross-sectional structure view of an arc-shaped plate of a low-noise metallurgical PP blower according to the present invention.

In the figure: 1-base, 2-shell, 3-exhaust pipe, 4-impeller, 5-protective screen, 6-heat dissipation box, 7-motor, 8-condensation box, 9-connecting pipe, 10-exhaust pipe, 11-exhaust box, 12-suction hood, 13-heat absorption box, 14-air bag, 15-T type plate, 16-connecting spring I, 17-vibration frequency tester, 18-fixing plate, 19-piston plate, 20-liquid medium, 21-evaporation hood, 22-installation box, 23-air collection box, 24-arc groove, 25-telescopic pipe, 26-filter screen, 27-garbage box, 28-elastic rope, 29-wind-gathering arc plate, 30-sliding plate, 31-telescopic column, 32-connecting spring II, 33-vent hole, 34-guide plate, 35-jet hole, 36-jet box, 37-arc plate I, 38-arc plate II, 39-connecting spring III, 40-electromagnet, 41-mounting groove and 42-magnetic plate.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Example 1

Referring to fig. 1 to 4, a low-noise PP blower for metallurgy, comprising a motor 7, wherein an impeller 4 is arranged on one side of the motor 7, a housing 2 is covered on the outside of the motor 7, a base 1 is fixedly connected to the outer wall of the bottom of the housing 2, a controller is arranged on one side of the housing 2, heat dissipation boxes 6 are arranged on the outer walls of the two ends of the housing 2, heat dissipation fans are arranged inside the heat dissipation boxes 6, a heat absorption box 13 is arranged on the inner wall of the top of the housing 2, a condensation box 8 and an air suction box 11 are fixedly connected to the outer wall of the top of the housing 2, an air bag 14 is arranged on the inner wall of the bottom of the air suction box 11, a fixing plate 18 is fixedly connected to the inner wall of the air suction box 11, a connecting pipe 9 is arranged on one side of the condensation box 8, the other end of the connecting pipe 9 is connected with the air bag 14, a pressure valve is arranged inside the connecting pipe 9, an evaporation cover 21 is arranged on the top of the heat absorption box 13, the top of the evaporation cover 21 is connected with the bottom of the air bag 14, a T-shaped plate 15 is slidably connected to the top of the fixing plate 18, and be equipped with vibration frequency detector 17 in the fixed plate 18, be equipped with connecting spring 16 between T template 15 and the fixed plate 18, and the outer wall of one side of T template 15 top is equipped with the striking piece, the controller respectively with radiator fan, vibration frequency detector 17 electrical property links to each other, the inside volatile liquid medium 20 that is heated that holds of heat absorption case 13, the event can be according to the heat that motor 7 produced in shell 2 in the running power of radiator fan in two radiator cases 6 of automatic regulation, need not manual operation regulation and control, save time greatly and energy-concerving and environment-protective.

Wherein, exhaust box 11 one side outer wall is equipped with exhaust tube 10, and exhaust tube 10 runs through shell 2 and is connected with suction hood 12, exhaust box 11 both ends outer wall all is equipped with blast pipe 3, and blast pipe 3 and exhaust tube 10 inside all is equipped with the check valve, T type 15 top outer wall fixedly connected with piston plate 19, so can adjust the frequency of T type 15 striking through the heat, thereby reciprocate in exhaust box 11 through driving piston plate 19, when piston plate 19 upwards moves in exhaust box 11, can pass through blast pipe 3 exhaust with the heat in the 18 top seal spaces of fixed plate, when piston plate 19 moves down, take out the heat in shell 2 through exhaust tube 10 and suction hood 12, so the radiating efficiency in the shell 2 can be promoted greatly to the circulation is reciprocal, guarantee that motor 7 is in suitable environment operation, promote its life.

The working principle is as follows: when the PP fan operates and works, the motor 7 in the shell 2 emits heat, at the moment, a heat-radiating fan in the heat-radiating box 6 operates to radiate the heat, the heated volatile liquid medium 20 in the heat-absorbing box 13 is heated, gasified and volatilized to enter the air bag 14 through the evaporation cover 21, the air bag 14 is expanded, the T-shaped plate 15 is pushed to move upwards in the expansion process of the air bag 14, the impact block impacts the fixed plate 18, when the air pressure in the air bag 14 reaches the threshold value of the pressure valve in the connecting pipe 9, the pressure valve is opened, so that the gas in the air bag 14 enters the condensing box 8 through the connecting pipe 9, finally the gas is condensed and liquefied to flow into the heat-absorbing box 13, and the circulation is repeated, if too much heat generated by the motor 7 in the shell 2 is not timely removed, the volatilization speed of the liquid medium 20 is increased, and the speed of the impact block on the T-shaped plate 15 is pushed to impact the fixed plate 18 by the expansion 14 of the air bag is increased, the vibration frequency detector 17 can detect the frequency of impact and transmit the detected data signal to the controller, so that the controller can adjust the operating power of the cooling fan according to the received impact frequency, manual operation regulation and control are not needed, time is greatly saved, energy is saved, environment is protected, in the process that the T-shaped plate 15 moves in a reciprocating mode under the action of the air bag 14, the piston plate 19 in the closed space above the fixed plate 18 can be driven to move back and forth, when the piston plate 19 moves upwards in the air suction box 11, heat in the closed space above the fixed plate 18 can be discharged through the exhaust pipe 3, when the piston plate 19 moves downwards, heat in the shell 2 is extracted through the exhaust pipe 10 and the air suction hood 12, the heat in the shell 2 can be extracted quickly through the cyclic reciprocating mode and can be matched with the cooling fan in the cooling box 6, and the cooling efficiency in the shell 2 is greatly improved, the motor 7 is ensured to be operated in a proper environment, and the service life of the motor is prolonged.

Example 2

Referring to fig. 1-6, compared with embodiment 1, in embodiment 1, on the basis of embodiment 1, the protective net 5 is disposed on the outer wall of one side of the heat dissipation box 6, the inner wall of the top of the heat dissipation box 6 is provided with the sliding groove 24, and the inner wall of the sliding groove 24 is connected with the filter screen 26 in a sliding manner, so that when the heat dissipation fan dissipates heat to the motor 7, metal particles, garbage, impurities and the like in the air flow can be filtered, and the influence on the motor 7 caused by the entering of the heat dissipation fan into the housing 2 is avoided.

Wherein, 6 top one side inner wall fixedly connected with install bin 22 of heat dissipation case, and install bin 22 one end outer wall is connected with 3 one ends of blast pipe, install bin 22 inner wall sliding connection has wind-gathering arc 29, and be equipped with elasticity rope 28 between wind-gathering arc 29 and the install bin 22 inner wall, so when piston plate 19 upwards moves in exhaust box 11 and gets into the install bin 22 with the heat through blast pipe 3 discharge in, can promote to gather wind-gathering arc 29 and slide in install bin 22, elasticity rope 28 is in the state of tightening straight this moment, and when piston plate 19 moved down, through no gas blowout, wind-gathering arc 29 resets under the effect of elasticity rope 28.

Wherein, install bin 22 one side sliding connection has flexible post 31, and be equipped with two 32 of coupling spring between flexible post 31 and the install bin 22 inner wall, flexible post 31 one side outer wall fixedly connected with slide 30, install bin 22 bottom outer wall is equipped with a plurality of air vents 33, the event glides and gathers wind arc 29 and can promote flexible post 31 through slide 30 and stretch out in install bin 22, and after slide 30 slided to a section distance, the exhaust heat of blast pipe 3 discharges through air vent 33, when gathering wind arc 29 and reseing, flexible post 31 resets through two 32 of coupling spring equally, so the circulation is reciprocal, flexible post 31 makes a round trip to slide in install bin 22.

Wherein, flexible post 31 one end articulates in filter screen 26 top one side outer wall, and the filter screen 26 bottom articulates in 6 bottom inner walls of heat dissipation case, and the filter screen 26 below is equipped with dustbin 27, and dustbin 27 fixed connection is in 6 bottom outer walls of heat dissipation case, so when flexible post 31 makes a round trip gliding in-process, flexible post 31 can promote filter screen 26 constantly to shake off and get rid of to the dustbin 27 with its surperficial filterable metal particle, rubbish impurity.

Example 3

Referring to fig. 1-8, compared with embodiment 2, in embodiment 2, a plurality of vent holes 33 are externally covered with the same gas collection box 23, and the outer wall of one side of the gas collection box 23 is provided with a telescopic pipe 25, one end of the telescopic pipe 25 penetrates through the filter screen 26 and is connected with the injection box 36, so that when heat flow is discharged through the vent holes 33, the heat flow enters the gas collection box 36 and then enters the injection box 36 through the telescopic pipe 25.

Wherein, the outer wall of the bottom of the injection box 36 is provided with a plurality of injection holes 35, a deflector 34 is arranged below the injection holes 35, and the deflector 34 and the injection box 36 are hinged with each other, so that the heat flow entering the injection box 36 is sprayed out through the injection holes 35 and is sprayed on the surface of the filter screen 26 under the action of the deflector 34.

Wherein, the outer wall of one side of the injection box 36 is fixedly connected with two arc-shaped columns 37, the inside of the arc-shaped column 37 is provided with a mounting groove 41, the inner wall of the top of the mounting groove 41 is provided with an electromagnet 40, the inner wall of the bottom of the mounting groove 41 is connected with an arc-shaped column II 38 in a sliding manner, the outer wall of the top of the arc-shaped column II 38 is fixedly connected with a magnetic plate 42, a connecting spring III 39 is arranged between the electromagnet 40 and the magnetic plate 42, by electrifying the electromagnet 40, the magnetic force generated by the electromagnet 40 and the magnetic force of the magnetic plate 42 are mutually attracted, so that the arc-shaped column II 38 can be pulled to retract into the mounting groove 41 in the arc-shaped column I37, at the moment, the connecting spring III 39 is compressed, when the electromagnet 40 is powered off, the generated magnetic force disappears, the guide plate 34 is reset under the effect of the resilience force of the connecting spring III 39, so that the circulation is repeated, the inclination angle of the guide plate 34 can be continuously changed, so that the heat injected through the injection hole 35 can be completely injected on the surface of the filter screen 26, and metal particles and garbage impurities on the surface are blown off, so that the cleaning effect is further improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.