阅读说明：本技术 一种超低耗电磁感应蒸发工业蒸汽系统 (Ultralow-consumption electromagnetic induction evaporation industrial steam system ) 是由 祝学忠 刘福海 吴超 祝嘉兴 于 2021-10-15 设计创作，主要内容包括：本发明公开了一种超低耗电磁感应蒸发工业蒸汽系统,包括：电磁感应加热蒸汽发生器,其输出端与用户端相连,以便向所述用户端提供高温高压蒸汽；至少两个蓄热加热设备,所述蓄热加热设备的输入端与纯净水供给设备相连,所述蓄热加热设备的输出端能够为所述电磁感应加热蒸汽发生器提供汽水混合物,且,其中一个蓄热加热设备为主蓄热加热设备,其余蓄热加热设备为备用切换蓄热加热设备；风电光电系统,其能够利用风力发电和太阳能发电；以及电力分配调节器,用于将所述风电光电系统所提供电力进行分配,其中部分电力用于供给电磁感应加热蒸汽发生器,另一部分电力用于供给蓄热加热设备。(The invention discloses an ultra-low consumption electromagnetic induction evaporation industrial steam system, which comprises: the output end of the electromagnetic induction heating steam generator is connected with a user side so as to provide high-temperature and high-pressure steam for the user side; the input end of the heat storage heating equipment is connected with the purified water supply equipment, the output end of the heat storage heating equipment can provide a steam-water mixture for the electromagnetic induction heating steam generator, one of the heat storage heating equipment is a main heat storage heating equipment, and the rest of the heat storage heating equipment is standby switching heat storage heating equipment; a wind power photovoltaic system capable of utilizing wind power generation and solar power generation; and the power distribution regulator is used for distributing the power provided by the wind power photoelectric system, wherein part of the power is used for supplying the electromagnetic induction heating steam generator, and the other part of the power is used for supplying the heat storage heating equipment.)

1. An ultra-low consumption electromagnetic induction evaporation industrial steam system is characterized in that: the method comprises the following steps:

the output end of the electromagnetic induction heating steam generator (3) is connected with a user end (4) so as to provide high-temperature and high-pressure steam for the user end (4);

the input end of the heat storage heating equipment (6) is connected with purified water supply equipment, the output end of the heat storage heating equipment (6) can provide a steam-water mixture for the electromagnetic induction heating steam generator (3), one of the heat storage heating equipment is a main heat storage heating equipment, and the other heat storage heating equipment is standby switching heat storage heating equipment;

a wind power photovoltaic system (1) capable of generating electricity by wind power and solar power; and

the power distribution regulator (2) is used for distributing the power provided by the wind power photoelectric system (1), wherein part of the power is used for supplying the electromagnetic induction heating steam generator (3), and the other part of the power is used for supplying the heat storage heating equipment (6).

2. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 1, wherein: the heat storage heating equipment (6) comprises a heat insulation structure and a heat exchange structure, wherein the heat exchange structure is arranged in the heat insulation structure, and the heat insulation structure is arranged below a foundation;

the heat exchange structure can heat the heat storage medium inside the heat exchange structure and heat purified water through the heat storage medium.

3. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 1, wherein: the system is characterized by further comprising a power grid security power supply system (5), wherein the power grid security power supply system (5) is used for supplying power to the heat storage heating equipment (6) and the electromagnetic induction heating steam generator (3) in a supplementing mode.

4. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 1, wherein: the temperature of steam heated by the electromagnetic induction heating steam generator is 165-1000 ℃, and the steam pressure is 0.7-10 MPa;

and the electromagnetic induction heating steam generator is provided with an automatic control system, and the automatic control system can be adjusted according to the temperature and pressure requirements of steam used by a user side.

5. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 2, wherein: the insulation construction includes:

an outer wall (61);

an inner wall (62) fixedly fitted to the inner side of the outer wall (61);

the lifting bottom plate (63) is connected to the inner side of the inner wall (62), and a plurality of lifting seats (64) are uniformly fixed at the bottom of the lifting bottom plate (63) and used as supports; and

the first partition plate (65) is annular and is vertically fixed on the lifting bottom plate (63), and a sealing plate is arranged between the first partition plate (65) and the top of the inner wall (62), so that a sealing space is formed among the sealing plate, the inner wall (62), the first partition plate (65) and the lifting bottom plate (63).

6. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 5, wherein: be provided with vacuum adjustment mechanism in the confined space, vacuum adjustment mechanism includes:

the two separating rings (612) are arranged in a vertically symmetrical and fixed mode, and the two separating rings (612) are respectively connected with the inner wall (62) and the first separating plate (65);

a valve body configured in two vertically symmetrical arrangements, and both embedded in the inner wall (62); and

the exhaust ring (613) is arranged between the inner wall (62) and the first partition plate (65) in a sealing and sliding manner, and a plurality of first magnetic blocks are embedded in the exhaust ring (613) in a circumferential array;

the inner wall is provided with a plurality of height regulators (615) in a circumferential array, and the output ends of the height regulators (615) are provided with magnetic blocks II corresponding to the magnetic blocks I.

7. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 5, wherein: the heat exchange structure comprises:

a second partition plate (66) fixed to the inside of the first partition plate (65);

a heating tank (67), the bottom of which is provided with a heater (68), and the heater (68) is fixed on the lifting bottom plate (63);

the outer temperature control pipe (69) is arranged between the second partition plate (66) and the heating tank (67) and is used for heating temperature control liquid;

a heating pipe (610) disposed inside the heating tank (67) for heating the heat storage medium inside the heating tank (67); and

and the spiral heat exchange tube (620) is used for receiving the purified water and heating the water body to form a steam-water mixture through heat exchange.

8. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 7, wherein: the top of the heating tank (67) is communicated with a water inlet pipe (616), the bottom of the water inlet pipe (616) is fixedly communicated with an outer cylinder (618), the inner wall of the outer cylinder (618) is provided with a stator, and a rotor (617) is rotatably arranged in the stator so as to drive the rotor (617) to rotate when purified water flows from top to bottom; the water outlet end of the outer barrel (618) is also connected with a spiral heat exchange tube (620) by a connecting tube (619).

9. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 8, wherein: the heating pipe is configured into the multiunit that coaxial array arranged, and every group heating pipe is a plurality of that the circumference array arranged, and the outside of each heating pipe all overlaps and is equipped with spiral heat exchange tube (620) along its axial extension, and is a plurality of spiral heat exchange tube (620) establish ties in proper order, and terminal spiral heat exchange tube (620) adopt outlet pipe (621) and electromagnetic induction heating steam generator's input to be linked together.

10. The ultra-low consumption electromagnetic induction evaporation industrial steam system of claim 8, wherein: the bottom of urceolus (618) is provided with reduction gears (622), reduction gears's input links to each other with rotor (617), reduction gears's output links to each other with promotion helical blade (624), the outside cover of promoting helical blade (624) is equipped with and is connected to riser (623) below reduction gears (622), the top radial connection of riser (623) has a plurality of row material section of thick bamboos (626), the below of promoting helical blade (624) is connected with disturbing vane (625).

Technical Field

The invention relates to the technical field of industrial steam, in particular to an ultra-low-consumption electromagnetic induction evaporation industrial steam system.

Background

With the rapid development of economic and social production, the energy consumption is continuously increased, and the traditional fossil energy development mode is difficult to continue the development of the current society;

the industrial steam system is a system capable of generating high-temperature and high-pressure steam to provide heat energy required by the industrial field, and the heat energy can realize heating, humidification, cleaning, sterilization, disinfection, drying, power generation, driving and the like;

the existing industrial steam system often utilizes traditional fossil energy to provide electric power so as to drive the heating device to directly heat and generate steam, and when the electromagnetic induction steam evaporator is adopted as a heating power source, the instant energy consumption of gas-liquid conversion is huge, so that the continuous supply of the steam is not facilitated.

Therefore, it is necessary to provide an ultra-low consumption electromagnetic induction evaporation industrial steam system to solve the above problems.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme: an ultra-low consumption electromagnetic induction evaporative industrial steam system, comprising:

the output end of the electromagnetic induction heating steam generator is connected with a user side so as to provide high-temperature and high-pressure steam for the user side;

the input end of the heat storage heating equipment is connected with the purified water supply equipment, the output end of the heat storage heating equipment can provide a steam-water mixture for the electromagnetic induction heating steam generator, one of the heat storage heating equipment is a main heat storage heating equipment, and the rest of the heat storage heating equipment is standby switching heat storage heating equipment;

a wind power photovoltaic system capable of utilizing wind power generation and solar power generation; and

and the power distribution regulator is used for distributing the power provided by the wind power photoelectric system, wherein part of the power is used for supplying power to the electromagnetic induction heating steam generator, and the other part of the power is used for supplying power to the heat storage heating equipment.

Further, preferably, the heat storage heating device comprises a heat preservation structure and a heat exchange structure, wherein the heat exchange structure is arranged in the heat preservation structure, and the heat preservation structure is arranged below a foundation;

the heat exchange structure can heat the heat storage medium inside the heat exchange structure and heat purified water through the heat storage medium.

Further, as preferred, the system also comprises a power grid security power supply system, wherein the power grid security power supply system is used for supplying power for the heat storage heating equipment and the electromagnetic induction heating steam generator in a supplementing manner.

Further, preferably, the temperature of the steam heated by the electromagnetic induction heating steam generator is 165-1000 ℃, and the steam pressure is 0.7-10 MPa;

and the electromagnetic induction heating steam generator is provided with an automatic control system, and the automatic control system can be adjusted according to the temperature and pressure requirements of steam used by a user side.

Further, preferably, the heat insulating structure includes:

an outer wall;

the inner wall is fixedly embedded at the inner side of the outer wall;

the lifting bottom plate is connected to the inner side of the inner wall, and a plurality of lifting seats are uniformly fixed at the bottom of the lifting bottom plate to be used as supports; and

the first partition plate is annular and is vertically fixed on the lifting bottom plate, and a sealing plate is arranged between the first partition plate and the top of the inner wall, so that a sealing space is formed among the sealing plate, the inner wall, the first partition plate and the lifting bottom plate.

Further, as a preferable mode, a vacuum adjusting mechanism is provided in the sealed space, and the vacuum adjusting mechanism includes:

the two separating rings are arranged in a vertically symmetrical and fixed mode and are respectively connected with the inner wall and the first separating plate;

the valve bodies are configured into two vertically symmetrically arranged and embedded in the inner wall; and

the exhaust ring is arranged between the inner wall and the first partition plate in a sealing and sliding mode, and a plurality of first magnetic blocks are embedded in the circumferential array of the exhaust ring;

the inner wall is provided with a plurality of height regulators in a circumferential array, and the output ends of the height regulators are provided with second magnetic blocks corresponding to the first magnetic blocks.

Further, as a preferred option, the heat exchange structure includes:

the second partition plate is fixed on the inner side of the first partition plate;

the bottom of the heating tank is provided with a heater, and the heater is fixed on the lifting bottom plate;

the outer temperature control tube is arranged between the second partition plate and the heating tank and is used for heating temperature control liquid;

the heating pipe is arranged in the heating tank and used for heating the heat storage medium in the heating tank; and

the spiral heat exchange tube is used for receiving the purified water and forming a heating water body through heat exchange to form a steam-water mixture.

Further, preferably, the top of the heating tank is communicated with a water inlet pipe, the bottom of the water inlet pipe is fixedly communicated with an outer cylinder, the inner wall of the outer cylinder is provided with a stator, and a rotor is rotatably arranged in the stator so as to drive the rotor to rotate when purified water flows from top to bottom;

the water outlet end of the outer barrel is also connected with the spiral heat exchange tube by a connecting tube.

Further, as preferred, the heating pipe is configured as the multiunit of coaxial array arrangement, and every group heating pipe is a plurality of that the circumference array was arranged, and the outside of each heating pipe all overlaps and is equipped with along its axial extension's spiral heat exchange tube, and is a plurality of spiral heat exchange tube establishes ties in proper order, and terminal spiral heat exchange tube adopts outlet pipe and electromagnetic induction heating steam generator's input to be linked together.

Further, as preferred, the bottom of urceolus is provided with reduction gears, reduction gears's input links to each other with the rotor, reduction gears's output links to each other with the promotion spiral leaf, the outside cover that promotes the spiral leaf is equipped with and is connected to the riser of reduction gears below, the top radial connection of riser has a plurality of row material section of thick bamboos, the below of promoting the spiral leaf is connected with disturbing vane.

Compared with the prior art, the invention provides an ultra-low consumption electromagnetic induction evaporation industrial steam system, which has the following beneficial effects:

1. the energy used by the electromagnetic induction heating steam generator can be generated by wind and light with near zero cost for most of time;

2. the residual electric heating heat storage carrier is from wind-solar power generation with near-zero cost;

3. the residual electric heating solves the nearly zero cost process that normal temperature water climbs from low temperature to high temperature and then evaporates in the totally-enclosed heat storage pool, and liquid-vapor conversion is completed before entering the electromagnetic induction heating steam generator, so that huge energy is saved;

4. the configured power grid guaranteed power supply system can guarantee continuous production to avoid instability existing in rainy days, nights and wind power generation, so that ultralow consumption, ultralow carbonization, and ultrahigh stability and reliability of production under various working conditions of industrial steam can be realized;

5. in the embodiment of the invention, through the continuous injection of the purified water, the purified water drives the rotor to rotate, so that the lifting spiral blades are driven to rotate, the middle heat storage medium is lifted from bottom to top and is dispersed through the discharge cylinder at the top, the uniformity of the whole heat is improved, and the uniformity of the distribution of the heat storage medium is improved;

6. in the embodiment of the invention, on one hand, the heating pipes are configured into a plurality of groups which are coaxially arranged in an array manner, each group of heating pipes is provided with a plurality of heating pipes which are arranged in a circumferential array manner, so that the distribution uniformity of the heating pipes can be improved, and the uniform heating of a heat storage medium is facilitated, and the spiral heat exchange pipes which extend along the axial direction of each heating pipe are sleeved outside each heating pipe, so that each spiral heat exchange pipe can exchange heat to the maximum extent, and the spiral heat exchange pipes are sequentially connected in series, so that the flowing distance and the flowing time of purified water in each spiral heat exchange pipe are facilitated to be prolonged, and the gas-liquid conversion effect is improved.

Drawings

FIG. 1 is a schematic diagram of an overall system of an ultra-low consumption electromagnetic induction evaporative industrial steam system;

FIG. 2 is a schematic diagram of a heat storage and heating apparatus in an ultra-low consumption electromagnetic induction evaporation industrial steam system;

FIG. 3 is a schematic diagram of a heating tank in an ultra low loss electromagnetic induction evaporative industrial steam system;

in the figure: 1. a wind power photoelectric system; 2. a power distribution regulator; 3. heating the steam generator by electromagnetic induction; 4. a user side; 5. a grid security power supply system; 6. a thermal storage heating device; 61. an outer wall; 62. an inner wall; 63. lifting the bottom plate; 64. lifting the seat; 65. a first partition plate; 66. a second partition plate; 67. a heating tank; 68. a heater; 69. an outer temperature control tube; 610. heating a tube; 611. a top plate; 612. a spacer ring; 613. an exhaust ring; 614. a driving magnetic block; 615. a height adjuster; 616. a water inlet pipe; 617. a rotor; 618. an outer cylinder; 619. a connecting pipe; 620. a spiral heat exchange tube; 621. a water outlet pipe; 622. a speed reduction mechanism; 623. a riser tube; 624. lifting the spiral blade; 625. disturbing the movable blade; 626. a discharge cylinder.

Detailed Description

Referring to fig. 1 to 3, the present invention provides an ultra-low consumption electromagnetic induction evaporation industrial steam system, including:

the output end of the electromagnetic induction heating steam generator 3 is connected with a user end 4 so as to provide high-temperature and high-pressure steam for the user end 4;

the input end of the heat storage heating device 6 is connected with a purified water supply device, the output end of the heat storage heating device 6 can provide a steam-water mixture for the electromagnetic induction heating steam generator 3, one of the heat storage heating devices is a main heat storage heating device, and the other heat storage heating devices are standby switching heat storage heating devices;

a wind power photovoltaic system 1 capable of utilizing wind power generation and solar power generation; and

the power distribution regulator 2 is used for distributing the power provided by the wind power photoelectric system 1, wherein part of the power is used for supplying the electromagnetic induction heating steam generator 3, and the other part of the power is used for supplying the heat storage heating equipment 6;

preferably, the system further comprises a power grid security power supply system 5, wherein the power grid security power supply system 5 is used for supplying power to the heat storage heating device 6 and the electromagnetic induction heating steam generator 3 in a complementary manner.

It is to be explained that, on the one hand, the energy used for the electromagnetic induction heating steam generator is mostly from near-zero cost wind-solar power generation; the heat carrier of the residual electric heating heat storage heating equipment is from wind-solar power generation with near zero cost; on the other hand, the problem of nearly zero cost process that normal temperature water climbs from low temperature to high temperature and then evaporates in the totally-enclosed heat storage pool is solved by residual electric heating, and liquid-vapor conversion is completed before the water enters the electromagnetic induction heating steam generator, so that huge energy is saved;

in addition, the configured power grid guaranteed power supply system can guarantee continuous production to avoid uncertainty existing in rainy days, nights and wind power generation, so that ultralow consumption, ultralow carbonization, and ultrastable reliability of production under various working conditions of industrial steam can be realized.

In this embodiment, the thermal storage heating device 6 includes a thermal insulation structure and a heat exchange structure, wherein the heat exchange structure is disposed in the thermal insulation structure, and the thermal insulation structure is disposed under a foundation;

the heat exchange structure can heat the heat storage medium inside the heat exchange structure and heat purified water through the heat storage medium.

In the embodiment, the temperature of steam heated by the electromagnetic induction heating steam generator is 165-1000 ℃, and the steam pressure is 0.7-10 MPa;

and, electromagnetic induction heating steam generator disposes autonomous system, autonomous system can adjust according to user's end with steam temperature, pressure requirement, and autonomous system is current controlgear, and it is no longer repeated here.

In this embodiment, as shown in fig. 2, the heat insulating structure includes:

an outer wall 61;

an inner wall 62 fixedly embedded in the inner side of the outer wall 61;

a lifting bottom plate 63 connected to the inner side of the inner wall 62, and a plurality of lifting seats 64 are uniformly fixed at the bottom of the lifting bottom plate 63 for supporting; and

the first partition plate 65 is annular and is vertically fixed on the lifting bottom plate 63, a sealing plate is arranged between the first partition plate 65 and the top of the inner wall 62, so that a sealed space is formed among the sealing plate, the inner wall 62, the first partition plate 65 and the lifting bottom plate 63, and a top plate 611 is further arranged on the outer wall body;

that is to say, in this embodiment, the thermal insulation wall body is constructed with interior wall and lifting bottom plate to the outside of interior wall is provided with the outer wall as the protection, and the lifting bottom plate is as supporting by the lifting seat, thereby has improved the heat preservation effect.

As a preferred embodiment, a vacuum adjusting mechanism is disposed in the sealed space, and the vacuum adjusting mechanism includes:

two separating rings 612 are arranged and fixed symmetrically up and down, and the two separating rings 612 are respectively connected with the inner wall 62 and the first separating plate 65;

a valve body configured as two disposed vertically symmetrically, and both embedded in the inner wall 62; and

the exhaust ring 613 is hermetically and slidably arranged between the inner wall 62 and the first partition plate 65, and a plurality of first magnetic blocks are embedded in a circumferential array in the exhaust ring 613;

the inner wall is provided with a plurality of height adjusters 615 in a circumferential array, and the output ends of the height adjusters 615 are provided with second magnetic blocks corresponding to the first magnetic blocks.

Wherein, altitude controller can be telescopic link, screw nut substructure etc. when implementing, for example, when the output of drive altitude controller moved down, the exhaust ring moved down thereupon under the magnetic force effect to compress the residual gas in the lower part space, when the exhaust ring moved to the valve body that is close the lower part, the valve body of lower part was opened this moment, and exhaust residual gas can, thereby guaranteed the vacuum in the confined space.

In this embodiment, as shown in fig. 2 and 3, the heat exchange structure includes:

a second partition plate 66 fixed to the inside of the first partition plate 65;

a heating tank 67, the bottom of which is provided with a heater 68, the heater 68 being fixed on the lifting bottom plate 63;

the outer temperature control pipe 69 is arranged between the second partition plate 66 and the heating tank 67 and is used for heating temperature control liquid;

a heating pipe 610 disposed inside the heating tank 67 for heating the heat storage medium inside the heating tank 67; and

and the spiral heat exchange tube 620 is used for receiving the purified water and forming a heating water body through heat exchange to form a steam-water mixture, and the outer temperature control tube and the heating tube are controlled by the heater to heat.

As a preferred embodiment, the top of the heating tank 67 is communicated with a water inlet pipe 616, the bottom of the water inlet pipe 616 is fixedly communicated with an outer cylinder 618, the inner wall of the outer cylinder 618 is provided with a stator, and a rotor 617 is rotatably arranged in the stator, so that when purified water flows from top to bottom, the rotor 617 can be driven to rotate;

the water outlet end of the outer cylinder 618 is also connected with a spiral heat exchange tube 620 by a connecting tube 619;

the bottom of urceolus 618 is provided with reduction gears 622, reduction gears's input links to each other with rotor 617, reduction gears's output links to each other with promoting helical blade 624, the outside cover of promoting helical blade 624 is equipped with and is connected to the riser 623 below reduction gears 622, the top of riser 623 radially is connected with a plurality of row material section of thick bamboo 626, the below of promoting helical blade 624 is connected with disturbing vane 625.

Consequently, when implementing, through the continuous injection of pure water, it can drive the rotor and rotate to drive promotion helical blade 624 rotates, realizes promoting from bottom to top to middle part heat accumulation medium, and disperses through the row's section of thick bamboo at top, has improved whole thermal homogeneity, has improved the homogeneity of heat accumulation medium distribution.

In this embodiment, the heating pipes are configured into a plurality of groups arranged in a coaxial array, each group of heating pipes is a plurality of heating pipes arranged in a circumferential array, the outside of each heating pipe is sleeved with a spiral heat exchange pipe 620 extending along the axial direction of the heating pipe, the spiral heat exchange pipes 620 are sequentially connected in series, and the spiral heat exchange pipe 620 at the tail end is communicated with the input end of the electromagnetic induction heating steam generator by adopting a water outlet pipe 621, on one hand, the heating pipes are configured into a plurality of groups arranged in a coaxial array, and each group of heating pipes is a plurality of heating pipes arranged in a circumferential array, so that the uniformity of the distribution of the heating pipes can be improved, and the uniform heating of a heat storage medium is facilitated, and the spiral heat exchange pipes 620 extending along the axial direction of the heating pipes are sleeved outside each heating pipe, so that each spiral heat exchange pipe can exchange heat to the maximum extent, and the spiral heat exchange pipes 620 are sequentially connected in series, which is beneficial to prolonging the flow distance and the flow time of purified water in the spiral heat exchange pipes, the gas-liquid conversion effect is improved.

In specific implementation, the output end of the electromagnetic induction heating steam generator 3 is connected with a user end 4 so as to provide high-temperature and high-pressure steam for the user end 4; then three heat storage heating devices 6 are configured, wherein the input end of each heat storage heating device 6 is connected with a purified water supply device, the output end of each heat storage heating device 6 is provided with a valve and is communicated to the input end of the electromagnetic induction heating steam generator, one heat storage heating device can be selected as a main heat storage heating device during working, and the rest heat storage heating devices are in a standby state; then, the wind power photoelectric system 1 is used for generating power, wherein the power provided by the wind power photoelectric system 1 is distributed through a power distribution regulator 2, part of the power is used for supplying power to the electromagnetic induction heating steam generator 3, and the other part of the power is used for supplying power to the heat storage heating equipment 6; and finally, a power grid guaranteed power supply system 5 is configured, wherein the power grid guaranteed power supply system 5 is used for supplementing power to the heat storage heating equipment 6 and the electromagnetic induction heating steam generator 3, so that continuous production is guaranteed, and uncertainty existing in rainy days, nights and wind power generation is avoided.

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 are equivalent to or changed within the technical scope of the present invention.