阅读说明：本技术 一种fsc赛车进气系统的排水装置 (Drainage device of FSC racing car air intake system ) 是由 梁毅 闻港 于 2021-01-07 设计创作，主要内容包括：本发明公开一种FSC赛车进气系统的排水装置,其包括防护壳体、导流扇、空气离心组件、干燥组件以及排水阀,其中,所述防护壳体的右端安装有导流扇,所述空气离心组件转动设置在防护壳体的中部,所述防护壳体内部位于较外侧圆周上均匀设置有多个干燥组件,用于对潮湿空气进行干燥处理,所述空气离心组件的右端与导流扇相固定连接,且,由导流扇驱动转动；所述防护壳体的右端中部设有出气管,用于与空气滤清器进气口相连通；多个所述空气离心组件所在圆周的最下方为蓄水空间,所述蓄水空间与分重空间相连通,以便空气离心组件中的水分落入蓄水空间内,且,所述蓄水空间与固定在防护壳体下方的排水阀相连通,用于对车辆进气系统的储水与排水。(The invention discloses a drainage device of an FSC racing car air inlet system, which comprises a protective shell, a flow guide fan, an air centrifugal assembly, drying assemblies and a drainage valve, wherein the flow guide fan is installed at the right end of the protective shell; the middle part of the right end of the protective shell is provided with an air outlet pipe which is communicated with an air inlet of an air filter; it is a plurality of the below of air centrifugation subassembly place circumference is the retaining space, the retaining space is linked together with dividing the heavy space to moisture in the air centrifugation subassembly falls into in the retaining space, just, the retaining space is linked together with the drain valve of fixing in the protective housing below, is used for the water storage and the drainage to vehicle air intake system.)

1. The utility model provides a FSC cycle racing air intake system's drainage device, its includes protecting casing (1), water conservancy diversion fan (2), air centrifugation subassembly (3), drying assembly (4) and drain valve (6), wherein, water conservancy diversion fan (2) are installed to the right-hand member of protecting casing (1), air centrifugation subassembly (3) are rotated and are set up the middle part in protecting casing (1) to get into drying assembly (4) with humid air separation, protecting casing (1) inside is located evenly to be provided with a plurality of drying assembly (4) on the circumference outside for carry out drying process, its characterized in that to humid air: the right end of the air centrifugal component (3) is fixedly connected with the flow guide fan (2) and is driven to rotate by the flow guide fan (2);

the middle part of the right end of the protective shell (1) is provided with an air outlet pipe (5) which is communicated with an air inlet of an air filter;

it is a plurality of the below of air centrifugation subassembly (3) place circumference is the retaining space, the retaining space is linked together with weight-sharing space (13) to moisture in air centrifugation subassembly (3) falls into in the retaining space, just, the retaining space is linked together with drain valve (6) of fixing in protective housing (1) below for water storage and drainage to vehicle air intake system.

2. The drain assembly of an air induction system for an FSC racing car of claim 1, wherein: the protection shell (1) is internally provided with a pressure stabilizing cavity (11), a drying space (12) and a weight dividing space (13), the weight dividing space (13) is communicated with the right end of the drying space (12) so that moist air separated by the weight dividing space (13) enters the drying space, the pressure stabilizing cavity (11) is communicated with the drying space (12), and the pressure stabilizing cavity (11) is communicated with the air centrifugal assembly (3).

3. The drain assembly of an air induction system for an FSC racing car of claim 1, wherein: the air centrifugal assembly (3) comprises a weight-dividing jacket (31) and one-way ventilation assemblies (32), the one-way ventilation assemblies (32) are uniformly and circumferentially distributed on the outer surface of the weight-dividing jacket (31), and the one-way ventilation assemblies (32) are communicated with the weight-dividing jacket.

4. The drain assembly of an air induction system for an FSC racing car according to claim 3, wherein: the cross section of the weight-dividing casing (31) is of a step structure, the inner diameters of the weight-dividing casing (31) are sequentially reduced from right to left, and the difference values of two adjacent unequal inner diameters are equal.

5. The drain assembly of an air induction system for an FSC racing car according to claim 3, wherein: the one-way ventilation assembly (32) comprises a limiting shell (321), a bearing supporting plate (322), a spring (323) and a sealing block (324), the upper end face of the bearing supporting plate (322) is connected with the sealing block (324) through the spring (323), and the sealing block (324) is located inside the limiting shell (321);

the lower end of the sealing block (324) is of an arc surface structure and is just tightly attached to the arc surface of the lower end of the limiting shell (321);

the spring (323) is always in a stretching state;

the bearing supporting plate (322) is provided with a plurality of through holes.

6. The drain assembly of an air induction system for an FSC racing car according to claim 5, wherein: a plurality of air outlet holes are formed in the circumference of the side face of the limiting shell (321), and the top end of the limiting shell is of an open structure;

the maximum inner diameter of the limiting shell (321) is larger than the maximum transverse width of the sealing block (324), and the air outlet holes are located in the area occupied by the maximum inner diameter of the limiting shell (321).

7. The drain assembly of an air induction system for an FSC racing car of claim 1, wherein: the drying assembly (4) comprises a micro telescopic rod (41), a pressing plate (42), absorbent cotton (43), a supporting plate (44), an anti-splash casing (45) and a sealing plate (46), the left end and the right end of the pressing plate (42) are respectively arranged on the sealing plate (46) fixed on the protective shell (1) in a sliding mode, the telescopic end of the micro telescopic rod (41) is fixedly connected with the upper end face of the pressing plate (42), the absorbent cotton (43) is laid on the upper end face of the supporting plate (44), and the anti-splash casing (45) is sleeved outside the absorbent cotton (43) and the supporting plate (44);

a plurality of flow guide ports are formed in the supporting plate (44) in a penetrating mode, and a certain distance is reserved between the supporting plate (44) and the inner side wall of the drying space (12);

the cross section of one side of the pressing plate (42), which is close to the absorbent cotton (43), is of an arc structure, and the radian of the cross section is matched with the radian of the outer surface of the absorbent cotton (43) so that the pressing plate and the absorbent cotton are tightly attached to each other;

the sealing plates (46) are all provided with communicating grooves so that the drying space (12) is communicated with the pressure stabilizing cavity (11).

8. The drain assembly of an air induction system for an FSC racing car according to claim 7, wherein: the splash-proof casing (45) is sleeved outside the water-absorbing cotton (43) and the supporting plate (44), one end of the splash-proof casing close to the inner circumference is fixed on the inner side wall of the drying space (12), and the upper end face of the splash-proof casing (45) is higher than the upper end face of the water-absorbing cotton (43);

a plurality of strip-shaped through grooves are formed in the circumference of the splash-proof casing (45), and the occupied range and the occupied position of the strip-shaped through grooves are matched with the drying assemblies (4);

both ends of the splash-proof casing (45) close to the drain valve (6) are communicated with the water storage space.

9. The drain assembly of an air induction system for an FSC racing car of claim 1, wherein: the drain valve (6) is including sealed fill up (61), sealed swivel nut (62) and coupling (64), the terminal surface cloth that protective housing (1) was kept away from in coupling (64) has the external screw thread, the external screw thread part of sealed swivel nut (62) and coupling (64) is to the meshing, the lower terminal surface embedding of coupling has sealed fill up (61) to closely laminate mutually with sealed swivel nut (62) and form sealed space.

10. The drain assembly of an air induction system for an FSC racing car of claim 9, wherein: the pipe joint (64) is provided with a plurality of water drainage holes (63) at the periphery of the part where the external thread is distributed.

Technical Field

The invention belongs to the technical field of automobile drainage devices, and particularly relates to a drainage device of an air intake system of an FSC racing car.

Background

The formula automobile competition for college students in China (abbreviated as 'China FSC') is a car design and manufacture competition participated in by college automobile engineering or related major of cars in school student teams, which requires each team of college students to design and manufacture a small-sized single seat leisure racing car with excellent performances in the aspects of acceleration, braking, controllability and the like within one year according to the competition rules and the racing car manufacturing standards, and can successfully complete the competition of all or part of the competition links, wherein an extremely important external factor for determining whether the racing car engine can run stably is the aridity of air entering the engine, the normal running of the engine can be seriously influenced after the humid air enters, meanwhile, the integral performance of the racing car can be influenced by the accumulated water in the air inlet system, therefore, a water drainage device is often required to be installed in the air inlet system of the racing car, to prevent moist air from entering the engine interior, however, it has been found that the water drains of the air induction systems of the currently available FSC racing cars tend to have the following problems:

1. only the one-way drain valve is arranged, so that accumulated water in a pipeline of the air inlet system can be cleaned, moist air cannot be dried, and the overall performance of the racing car can be affected;

2. the drainage device is arranged on the air inlet pipeline behind the air filter of the air inlet system, so that the moisture in the humid air is absorbed by the filter element in the air filter to reduce the filtering effect of the filter element, and the air filter which is in the humid environment for a long time is more easily corroded and damaged, so that the service life is reduced;

3. the drainage device with fixed pressure limiting is adopted, namely, when the pressure of accumulated water reaches a pressure limiting critical point, the accumulated water can be automatically drained, however, the automatic drainage of the accumulated water in the process of high-speed running of the racing car can seriously affect the shape and the use of a rear vehicle, and even cause accidents.

Accordingly, one skilled in the art provides a drainage arrangement for an air induction system of an FSC racing car to solve the problems set forth in the background above.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme: a drainage device of an air inlet system of an FSC racing car comprises a protective shell, a flow guide fan, an air centrifugal assembly, a drying assembly and a drainage valve, wherein the flow guide fan is installed at the right end of the protective shell, the air centrifugal assembly is rotatably arranged in the middle of the protective shell so as to separate damp air into the drying assembly, a plurality of drying assemblies are uniformly arranged on the periphery of the outer side in the protective shell and used for drying the damp air, and the right end of the air centrifugal assembly is fixedly connected with the flow guide fan and driven to rotate by the flow guide fan;

the middle part of the right end of the protective shell is provided with an air outlet pipe which is communicated with an air inlet of an air filter;

it is a plurality of the below of air centrifugation subassembly place circumference is the retaining space, the retaining space is linked together with dividing the heavy space to moisture in the air centrifugation subassembly falls into in the retaining space, just, the retaining space is linked together with the drain valve of fixing in the protective housing below, is used for the water storage and the drainage to vehicle air intake system.

Further, as a preferred option, the protective shell internally comprises a pressure stabilizing cavity, a drying space and a weight dividing space, the weight dividing space is communicated with the right end of the drying space so that the wet air separated by the weight dividing space can enter the drying space, the pressure stabilizing cavity is communicated with the drying space, and the pressure stabilizing cavity is communicated with the air centrifugal assembly.

Further, as preferred, the air centrifugation subassembly includes the partial weight cover shell and one-way ventilation subassembly, the even circumference of one-way ventilation subassembly distributes in the surface of partial weight cover shell, and, a plurality of one-way ventilation subassembly all is linked together with the partial weight cover shell.

Further, as preferred, the cross section of dividing the heavy cover shell is the notch cuttype structure, and from right to left the internal diameter of dividing the heavy cover shell reduces in proper order, and the difference of two adjacent internal diameters that are not equal equals.

Further, preferably, the one-way ventilation assembly comprises a limiting shell, a bearing supporting plate, a spring and a sealing block, the upper end surface of the bearing supporting plate is connected with the sealing block through the spring, and the sealing block is located inside the limiting shell;

the lower end of the sealing block is of an arc surface structure and is just tightly attached to the arc surface of the lower end of the limiting shell;

the spring is always in a stretching state;

the bearing supporting plate is provided with a plurality of through holes.

Further, preferably, a plurality of air outlet holes are formed in the circumference of the side face of the limiting shell, and the top end of the limiting shell is of an open structure;

the maximum inner diameter of the limiting shell is larger than the maximum transverse width of the sealing block, and the air outlet holes are located in the area occupied by the maximum inner diameter of the limiting shell.

Further, preferably, the drying assembly comprises a micro telescopic rod, a pressing plate, absorbent cotton, a supporting plate, an anti-splash casing and a sealing plate, the left end and the right end of the pressing plate are respectively arranged on the sealing plate fixed on the protective shell in a sliding mode, the telescopic end of the micro telescopic rod is fixedly connected with the upper end face of the pressing plate, the absorbent cotton is paved on the upper end face of the supporting plate, and the anti-splash casing is sleeved outside the absorbent cotton and the supporting plate;

a plurality of flow guide ports are formed in the supporting plate in a penetrating mode, and a certain distance is reserved between the supporting plate and the inner side wall of the drying space;

the cross section of one side of the pressing plate, which is close to the absorbent cotton, is of an arc structure, and the radian of the pressing plate is matched with the radian direction of the outer surface of the absorbent cotton so that the pressing plate and the absorbent cotton are tightly attached to each other;

and the sealing plates are provided with communicating grooves so as to facilitate the communication between the drying space and the pressure stabilizing cavity.

Preferably, the splash-proof casing is sleeved outside the water-absorbing cotton and the support plate, one end of the splash-proof casing close to the circumference of the inner side is fixed on the inner side wall of the drying space, and the upper end face of the splash-proof casing is higher than the upper end face of the water-absorbing cotton;

a plurality of strip-shaped through grooves are formed in the circumference of the splash-proof casing, and the occupied range and the occupied position of the strip-shaped through grooves are matched with those of the drying assemblies;

both ends of the splash-proof casing close to the drain valve are communicated with the water storage space.

Further, as preferred, the drain valve is including sealed the pad, sealed swivel nut and coupling, the coupling is kept away from the one end surface cloth of protective housing and is had the external screw thread, the external screw thread part of sealed swivel nut and coupling is to the meshing, the lower terminal surface embedding of coupling has sealed the pad to closely laminate mutually with sealed swivel nut and form sealed space.

Preferably, the pipe joint is provided with a plurality of drainage holes at the circumference of the part provided with the external thread.

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

1. the device is provided with an air centrifugal component, the rotating speed of the air centrifugal component is increased along with the increase of the vehicle speed under the drive of a flow guide fan, the air quality is higher when the humidity is higher, therefore, the air with higher humidity is thrown out of the air centrifugal component under the action of the centrifugal force, then the air enters a drying component, the water-absorbing cotton in the drying component absorbs water and is dried, then the air enters an air filter from a left air outlet pipe, the wet air is dried, meanwhile, the water-absorbing cotton is adopted to effectively prevent water accumulation, and finally, the water in the water-absorbing cotton is extruded out by a pressure plate driven by a miniature compression rod and is temporarily stored in a water storage space, so that the dryness of the air entering an air inlet system is fully ensured, and the engine can stably run;

2. the device is arranged at the front part of the air filter, namely, the outside air is dried by the device and then enters the air filter through the air outlet pipe at the left end, so that the dryness of the air entering the air filter is realized, the service life of the filter element is prolonged, and the filtering effect is improved;

3. the bottom of this device is provided with the drain valve, treats the vehicle and stops the back, through loosening sealed swivel nut soon for ponding in the retaining space freely discharges, and, is provided with sealed the pad between sealed swivel nut and the coupling, has better sealing performance, prevents that the high-speed in-process ponding of traveling of cycle racing from leaking, thereby has improved the security of match in-process.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of the present invention;

FIG. 3 is a left side view of the drying assembly of the present invention;

FIG. 4 is a schematic view of a one-way vent assembly of the present invention;

FIG. 5 is a schematic view showing the structure of a drain valve according to the present invention;

in the figure: 1. a protective housing; 11. a voltage stabilizing cavity; 12. a drying space; 13. dividing weight space; 2. a flow guiding fan; 3. an air centrifuge assembly; 31. a weight-dividing jacket; 32. a one-way vent assembly; 321. a limiting shell; 322. carrying a supporting plate; 323. a spring, 324, a sealing block; 4. a drying assembly; 41. a miniature telescopic rod; 42. pressing a plate; 43. absorbent cotton; 44. a support plate; 45. a splash guard housing; 46. a sealing plate; 5. an air outlet pipe; 6. a drain valve; 61. a gasket; 62. sealing the threaded sleeve; 63. a drain hole; 64. a pipe joint.

Detailed Description

Referring to fig. 1, in an embodiment of the present invention, a drainage apparatus for an air intake system of an FSC racing car includes a protective housing 1, a flow guiding fan 2, an air centrifugal component 3, a drying component 4, and a drainage valve 6, where the flow guiding fan 2 is installed at a right end of the protective housing 1, the air centrifugal component 3 is rotatably disposed in a middle of the protective housing 1 so as to separate moist air into the drying component 4, a plurality of drying components 4 are uniformly disposed on a circumference of an outer side inside the protective housing 1 and are used for drying the moist air, and a right end of the air centrifugal component 3 is fixedly connected to the flow guiding fan 2 and is driven by the flow guiding fan 2 to rotate;

the middle part of the right end of the protective shell 1 is provided with an air outlet pipe 5 which is communicated with an air inlet of an air filter;

it is a plurality of the below of the circumference that air centrifugation subassembly 3 is located is the retaining space, the retaining space is linked together with dividing heavy space 13 to moisture in the air centrifugation subassembly 3 falls into the retaining space, just, the retaining space is linked together with the drain valve 6 of fixing in protection casing 1 below for water storage and drainage to vehicle air intake system.

In this embodiment, the protective casing 1 includes a pressure stabilizing cavity 11, a drying space 12 and a weight dividing space 13 inside, the weight dividing space 13 is communicated with the right end of the drying space 12, so that the moist air separated from the weight dividing space 13 enters the drying space, the pressure stabilizing cavity 11 is communicated with the drying space 12, and the pressure stabilizing cavity 11 is communicated with the air centrifugal assembly 3, wherein, because the air flow rates in the drying space 12 and the air centrifugal assembly 3 are different, the pressure stabilizing cavity 11 enables the air with different flow rates of the two parts to converge, on one hand, the air with different humidity is neutralized, on the other hand, the air flow rate flowing out from the air outlet pipe 6 is uniform, the pressure is stable, and the stability is improved.

In a preferred embodiment, the air centrifugal assembly 3 includes a sub-weight casing 31 and one-way ventilation assemblies 32, the one-way ventilation assemblies 32 are uniformly and circumferentially distributed on the outer surface of the sub-weight casing 31, and a plurality of the one-way ventilation assemblies 32 are communicated with the sub-weight casing, the one-way ventilation assemblies 32 enable air and moisture in the air centrifugal assembly 3 to be thrown into the sub-weight space 13 under the action of centrifugal force, so as to prevent the moisture and air in the sub-weight space 13 from flowing back into the air centrifugal assembly 3, thereby ensuring the dryness of the sub-weight casing 31 and further enabling the air directly entering the pressure stabilizing cavity 11 from the air centrifugal assembly 3 to be dried.

In this embodiment, the cross section of the partial weight casing 31 is of a step structure, and the inner diameters of the partial weight casing 31 are sequentially reduced from right to left, the difference values of two adjacent unequal inner diameters are equal, the inner diameter of the partial weight casing 31 is gradually reduced along the flowing direction of air in the device, and the air in the partial weight casing 31 is continuously graded, that is, only the air with small air specific gravity (the air humidity is lower than the air inlet standard) can directly flow into the pressure stabilizing cavity 11 through the partial weight casing 31.

Referring to fig. 4, in the present embodiment, the one-way ventilation assembly 32 includes a limiting shell 321, a receiving supporting plate 322, a spring 323, and a sealing block 324, the upper end surface of the receiving supporting plate 322 is connected to the sealing block 324 through the spring 323, and the sealing block 324 is located inside the limiting shell 321, wherein under the action of the spring 323, as the rotating speed of the weight-sharing casing 31 increases, the opening degree of the sealing block 324 also increases within a certain range, so as to increase the centrifugal rate of gas and moisture;

the lower end of the sealing block 324 is of an arc-shaped structure and is just tightly attached to the arc surface of the lower end of the limiting shell 321;

the spring 323 is always in tension to ensure that the one-way vent assembly 32 is initially in a closed state;

the receiving support plate 322 is provided with a plurality of through holes so that air and moisture in the weight-dividing casing 31 can be thrown out under the action of centrifugal force.

In this embodiment, the side circumference of the limiting shell 321 is provided with a plurality of air outlets, and the top end of the limiting shell is an open structure;

the maximum inner diameter of the limiting shell 321 is greater than the maximum transverse width of the sealing block 324, that is, the sealing block 324 does not contact with the inner wall of the limiting shell 321, so that the smoothness of opening and closing of the sealing block 324 along with the weight distributing casing 31 at different rotating speeds is ensured, and the air outlet holes are located in the area occupied by the maximum inner diameter of the limiting shell 321.

Referring to fig. 2, as a preferred embodiment, the drying assembly 4 includes a micro telescopic rod 41, a pressing plate 42, absorbent cotton 43, a supporting plate 44, an anti-splash casing 45 and a sealing plate 46, wherein the left and right ends of the pressing plate 42 are respectively slidably disposed on the sealing plate 46 fixed on the protective housing 1, the telescopic end of the micro telescopic rod 41 is fixedly connected with the upper end surface of the pressing plate 42, the absorbent cotton 43 is laid on the upper end surface of the supporting plate 44, and the anti-splash casing 45 is sleeved outside the absorbent cotton 43 and the supporting plate 44;

a plurality of flow guide ports are formed in the supporting plate 44 in a penetrating manner, and a certain distance is reserved between the supporting plate 44 and the inner side wall of the drying space 12 so as to reserve a flowing space for the water extruded by the absorbent cotton 43;

the cross section of one side of the pressure plate 42, which is close to the absorbent cotton 43, is of an arc structure, and the radian of the cross section is matched with the radian direction of the outer surface of the absorbent cotton 43, so that the pressure plate and the absorbent cotton are tightly attached to each other;

the sealing plates 46 are all provided with communication grooves so that the drying space 12 is communicated with the pressure stabilizing cavity 11.

Referring to fig. 3, in this embodiment, the splash-proof housing 45 is sleeved on the absorbent cotton 43 and the outer portion of the supporting plate 44, and is fixed on the inner sidewall of the drying space 12 near one end of the inner circumference, and the upper end surface of the splash-proof housing 45 is higher than the upper end surface of the absorbent cotton 43, wherein the splash-proof housing 45 and the inner sidewall of the drying space 12 form an annular flow channel, and after the pressing plate 42 contacts the absorbent cotton 43, a closed annular tube is formed between the pressing plate 42 and the annular flow channel to prevent water from splashing during pressing the absorbent cotton 43, so that water pressed on the absorbent cotton 43 can flow into the water storage space along the annular flow channel, and drainage of accumulated water is facilitated;

a plurality of strip-shaped through grooves are formed in the circumference of the splash-proof casing 45, and the occupied ranges and positions of the strip-shaped through grooves are matched with those of the drying assemblies 4;

both ends of the splash-proof casing 45 close to the drain valve 6 are communicated with the water storage space.

Referring to fig. 5, in this embodiment, drain valve 6 includes sealed pad 61, sealed swivel nut 62 and coupling 64, the one end surface cloth that protective housing 1 was kept away from to coupling 64 has the external screw thread, sealed swivel nut 62 and coupling 64's external screw thread part is to the meshing, the lower terminal surface embedding of coupling has sealed pad 61 to form sealed space with sealed swivel nut 62 closely laminating mutually, thereby prevent the condition emergence of ponding hourglass in the racing car driving process, and then improved the security of contesting in-process.

In this embodiment, the pipe joint 64 is provided with a plurality of drainage holes 63 at the periphery of the external thread portion.

Specifically, when the racing car runs, the air outlet pipe is in a negative pressure state due to the operation of an engine, simultaneously, the guide fan starts to rotate due to wind resistance generated by the forward movement of the car, at the same time, the air centrifugal assembly also rotates along with the guide fan at the same speed, air with higher humidity is thrown out of the outer part of the weight-sharing casing under the action of centrifugal force, drier air directly enters the pressure stabilizing cavity from the left end of the weight-sharing casing, the air pressure in the weight-sharing space is gradually increased due to the continuous entering of the air, part of the air enters the drying assembly along with the trend, and enters the pressure stabilizing cavity from the left end of the sealing plate after being dried by the water absorption cotton, and finally flows into the air filter through the air outlet pipe, when the water absorption amount in the water absorption cotton reaches 2/3 of the maximum water absorption amount, the pressure plate is driven by the micro telescopic rod to slowly approach the water absorption cotton and gradually extrude the water in the water absorption cotton, the water that extrudes flows out through a plurality of water conservancy diversion mouths on the backup pad and flows in the retaining space through the splashproof cover shell, treats that the vehicle stops the back, and the sealed swivel nut of unscrewing makes ponding freely discharge, and the moisture will seal the swivel nut after discharging completely and screw can.

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 equivalent substitutions or changes according to the technical solution and the inventive concept of the present invention should be covered by the scope of the present invention.