WO2024117276A1

WO2024117276A1 - Specially-structured hot air blower for ultra-high speed blowing

Info

Publication number: WO2024117276A1
Application number: PCT/KR2022/018973
Authority: WO
Inventors: 이권익; 김나영; 김예은; 김종규; 김동욱
Original assignee: 아르고 마린토탈 (주); 재단법인 중소조선연구원
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2024-06-06

Abstract

A specially-structured hot air blower for ultra-high speed blowing, according to the present invention, is provided with: a housing in which is formed a heating chamber having an outlet formed; a baffle unit which comprises baffles which have at least one air flow hole and are installed at predetermined intervals in the heating chamber; electric heating coils which are respectively installed between the baffles; a main blower which is installed in the housing in order to blow air to the heating chamber; and at least one auxiliary blower which is for inhibiting the generation of a vortex of the air blown by the main blower.

Description

Specially structured heater for ultra-high-speed blowing

The present invention relates to a hot air blower, and more specifically, to a hot air blower with a special structure for ultra-high-speed blowing that can prevent damage to the heater due to overheating and improves the fluidity of air by reducing the generation of vortices when air flows. .

In general, an electric heater generates heat in an electric heating coil using electricity as an energy source, and has a structure for heating the air sucked by the blower by supplying it to the electric heating coil.

These electric heaters are widely used on ships transporting steel coils, industrial sites, heating facility houses, drying agricultural products, etc. Electric heaters have a simple structure compared to fossil fuel heaters, and are relatively superior in stability, economic efficiency, and convenience of use, so they are used.

Republic of Korea Patent No. 10-2408963 discloses an industrial heater, and Republic of Korea Patent No. 10-2349177 discloses a heater with improved thermal efficiency using pipes.

And in Republic of Korea Patent No. 10-0531517, an electric high-pressure heater is published. The posted hot air blower is provided with an air flow path between the outer case and the inner case, and at least one reduction member with a plurality of air holes is installed in the air flow path so that the air flowing into the inner case flows to the upper part along the air flow path. It has a structure in which it is heated in multiple stages by electric heaters as it moves.

Since the electric heater located on the outlet side of this type of heater exchanges heat with air at a relatively high temperature, there is a problem in that the electric heater is easily damaged, and the air flow path is relatively long, so the flow rate cannot be increased.

The present invention is intended to improve the problems described above, and is a special structure for ultra-high-speed blowing that prevents the heat transfer coil from overheating and being damaged by ensuring smooth heat exchange between the heat transfer coil and the air supplied by the blower. The purpose is to provide a hot air blower.

Another object of the present invention is to provide a special structure for ultra-high-speed blowing that can suppress the generation of vortices when air blown by a blower passes through an air flow hole formed in the baffle, and can reduce loss in fluid flow by forming an auxiliary air flow. To provide a hot air blower.

The specially structured heater for ultra-high-speed blowing of the present invention to achieve the above object includes a housing in which a heating chamber with a discharge port is formed, and baffles having at least one air flow hole in the heating chamber and installed at predetermined intervals. A baffle unit,

Electric heating coils installed between the baffles, respectively. It is installed in the housing and is characterized by having a main blower for blowing air into the heating chamber and at least one auxiliary blower to suppress the generation of vortices in the air blown by the main blower.

In the present invention, the baffles constituting the baffle unit are composed of first, second, third, and fourth baffles, and a square first air flow hole is formed in the center at the upper side of the first baffle, and on both sides of the first baffle. Circular second and third air flow holes are formed on the lower side, and a fourth air flow hole is formed on the lower side, which corresponds to the outlet of the main blower and is smaller than the second and third air flow holes,

The second baffle is formed larger than the first air flow hole and has a third air flow hole slanted from the center toward the bottom,

Curved incisions are formed on both sides of the third baffle to form sixth and seventh air flow holes on both sides of the heating chamber, and an eighth air flow hole is formed on the side corresponding to the first air flow hole,

A ninth ventilation hole formed in the vertical direction is formed in the fourth baffle.

And the heating chamber further includes an induction inclined portion formed by gradually decreasing the cross section of the air blown from the outlet of the main blower toward the outlet,

It further includes a supporter installed on the frame on which the housing is supported, and a magnet unit installed on the supporter.

As described above, the specially structured heater for ultra-high-speed blowing according to the present invention installs outlets with air flow holes formed at predetermined intervals inside the heating chamber, and installs a heating coil between them, thereby forming a heating coil between the baffles. It is possible to ensure smooth heat exchange with the heat exchanger, and furthermore, it is possible to prevent the heating coil from overheating and being damaged. In addition, ventilation resistance due to flow can be reduced by suppressing the generation of vortices in the air as it passes through each air flow hole between the baffles.

In addition, the specially structured heater for ultra-high-speed blowing according to the present invention is equipped with an auxiliary blower to prevent the pressure distribution of the air discharged from the outlet of the main blower from being generated unevenly within the space formed by the heating chamber and the first baffle. You can.

1 is a perspective view of a special structure heater for ultra-high-speed blowing according to the present invention;

Figure 2 is a partially cut perspective view of a special structure heater for ultra-high-speed blowing according to the present invention;

Figure 3 is a flat cross-sectional view of the special structure heater for ultra-high-speed blowing shown in Figure 1;

Figure 4 is a cross-sectional view of the special structure heater for ultra-high-speed blowing shown in Figure 1;

Figure 5 is an exploded perspective view showing the baffle unit, main blower, and auxiliary blower according to the present invention;

Figures 6 and 7 are views showing the results of heat flow analysis of a special structure heater for ultra-high-speed blowing according to the present invention.

Examples of a specially structured heater for ultra-high-speed blowing according to the present invention are shown in Figures 1 to 5. Figure 2 is a perspective view of a partially cut away heater, and Figure 5 is a perspective view showing a baffle unit, a main blower, and an auxiliary blower.

Referring to the drawings, the specially structured heater 10 for ultra-high-speed blowing according to the present invention is installed on the frame 11 and includes a housing 20 with a heating chamber 25 having a discharge port 21. , the inside of the heating chamber 25 formed in the housing 20 is provided with a baffle unit 30 including baffles in which at least one air flow hole is formed. And electric heating coils 100 are installed in the space partitioned by the baffles constituting the baffle units 30.

And the frame 11 includes a main blower 50 for blowing air into the heating chamber 25, and at least one auxiliary device for suppressing the generation of vortices in the air blown by the main blower 50 and equalizing the pressure. A blower 55 is installed.

The specially structured heater 10 for ultra-high-speed blowing according to the present invention configured as described above will be described in more detail for each component as follows.

A discharge guide 22 having a discharge port 21 is formed on the front side of the heating chamber 25 formed in the housing 20, which is installed on one side of the housing 20 installed on the frame 11. The discharge guide 22 is provided with a discharge port 21. (22) has a structure tapered toward the side where the discharge port 21 is formed.

A first air supply port 26 connected to the blower port of the main blower 50 is installed on the rear side of the discharge chamber 25 corresponding to the discharge port 21, and at least one second air supply port ( 27) is formed. Two second air supply ports 27 may be formed on both sides of the upper side of the first air supply port 26. The first air supply port 26 is preferably formed to have a relatively smaller diameter than the diameter of the second air supply port 27.

And, in the lower part of the front side of the heating chamber 25, an inductive inclined portion 28 is formed by gradually decreasing the cross-section, and the inductive inclined portion 28 increases in cross-sectional area from the central side of the heating chamber 25 to the front side. By reducing it, the flow pressure can be increased.

The housing 20 installed on the frame 11 may be surrounded by the main cover 29, and a space for installing the main blower 50 of the housing is formed.

And the baffle unit 30 includes plate-shaped baffles that are installed at predetermined intervals inside the heating chamber 20 to partition the internal space of the heating chamber 20. These baffles are connected to the first air supply port 26. It consists of first, second, third, and

fourth baffles

31, 32, 33, and 34 arranged from the discharge port 21 side.

In the first baffle 31, a square air flow hole 41 is formed on the upper side of the central portion, circular second and third

air flow holes

42 and 43 are formed on both sides of the first baffle, and the above-mentioned

air flow holes

42 and 43 are formed on the lower side. It corresponds to the first air supply port 26 where the blower of the main blower 50 is installed, and a fourth air flow hole 44 with a smaller diameter than the first air supply port 26 is formed.

The second baffle 32 is larger than the first air flow hole 41 and has a rectangular fifth air flow hole 45 deviated from the center toward the bottom. The second air flow hole 45 is not limited to the above-described embodiment and may be formed in a rectangular shape.

And the plate-shaped third baffle 33 has curved portions 33a formed on both sides to form substantially semi-elliptical sixth and seventh

air flow holes

46 and 47 on the inside of both sides of the heating chamber 20. do. Additionally, a relatively small circular eighth air flow hole 48 is formed on the lower side of the third baffle 33.

In addition, the fourth baffle 44 has a rectangular ninth air flow hole 49 formed in the vertical direction at the center, and the ninth air flow hole 49 may be formed in an oval shape.

Meanwhile, on the lower side of the space partitioned by the first baffle 31 inside the heating chamber 20, the air flowing in from the first air supply port 26 is supplied to the second and third air flow holes 42. ) A guiding blade (35) is further provided to guide it to the (43) side.

In addition, a pair of vertically installed heating coils 100 are installed in the internal space partitioned by the first, second, third, and

fourth baffles

31, 32, 33, and 34. The heating coils ( 100), a heating element may be installed inside the tube, and heat dissipation fins may be installed on the outer circumferential surface of the tube. The heating coil 100 is not limited to the above-described embodiment and can be any structure capable of heating air. For example, a heat exchanger using a heat medium, a ceramic induction heating element, etc. may be used.

The main blower 50 may use a relatively high pressure blower. The blower is coupled to the first air supply port 26, and the auxiliary blower 55 is installed at the second air supply port 27. do. The auxiliary blower 55 is installed when two second air supply ports 27 are formed. The main blower 50 preferably uses a sirocco fan, and the auxiliary blower 55 preferably uses an axial fan.

The frame 11 may further be provided with a magnet unit 60 installed on the support 61 so that it can be attached to the steel coil by magnetic force when installed at a site where the steel coil is loaded. The magnet unit 60 is preferably equipped with a mag switch magnet to turn the magnetic force on and off.

The operation of the specially structured heater for ultra-high-speed blowing according to the invention configured as described above will be explained as follows.

In order to generate hot air using a specially structured hot air blower for ultra-high-speed blowing, the main blower 50 and the auxiliary blower 55 are driven, as well as the first, second, third, and fourth baffles (31) (32) (33). ) Power is applied to the electric heating coil 100 installed in the space partitioned by (34) to generate heat.

In this way, the air flowing into the first air supply port (26) through the outlet of the main blower (50) is guided upward through the guide blade (35), partitioned by the first baffle (31). Deviations in pressure distribution occur within the space. This deviation is caused by the air supplied at a predetermined pressure from the auxiliary blower 55 installed to be connected to the second air supply port 27 on the upper side, thereby activating the vortex inside the space and maintaining the equilibrium state of pressure. Accordingly, the fluidity of air within the space partitioned by the first baffle 31 is activated, thereby improving heat exchange efficiency with the heat transfer coil 100.

The air heat exchanged in this way is divided into the upper and lower sides by the first and second baffles (31) (32) through the first, second, third and fourth air flow holes (41) (42) (43) (44). flows into the space defined by the second and

third baffles

42 and 43 through the fifth air flow hole 45 formed in the longitudinal direction of the second baffle 32.

And the air flowing into the space formed in the second and third baffles (42) and (43) branches to both sides through the sixth and seventh air flow holes (46 and 47) formed on both sides of the third baffle (43). After that, it flows into the space divided by the 3rd and 4th baffles, and is discharged to the discharge port 21 through the 9th air flow hole 49 formed in the 4th baffle 44.

In this process, the air is heated by a pair of electric heating coils 100 installed in each space, and the air flowing into the space formed by each baffle promotes turbulence within the space, thereby heating the electric heating coil 100 and the electric heating coil 100. Heat exchange is activated, and turbulence is reduced as the air passes through each flow hole.

In particular, the air discharged through the fourth air induction hole (44) promotes turbulence in the space formed by the first and second baffles (41) and (42), and the eighth air formed in the third baffle (33) The air passing through the flow hole 48 promotes turbulence in the space formed by the third and fourth baffles, thereby activating heat exchange with the heat transfer coils 100.

And since the 9th air flow hole 49 formed in the 4th baffle 34 is formed smaller than the area of the space formed in the 3rd and

4th baffles

33 and 34, the angle of the 9th air flow hole 49 The static pressure of the air discharged from the area can be maintained relatively uniform. And in this way, the air that has passed through the ninth air flow hole (49) is discharged while being constricted toward the discharge port (21) by the discharge guide (22).

As explained above, the specially structured heater for ultra-high-speed blowing activates heat exchange with the heat coil through the generation of eddy currents in the space formed by the baffles, and the air flow holes formed in each baffle This can reduce the generation of vortices and activate the air flow.

According to flow analysis by CFD (Computational Fluid Dynamics) of a specially structured heater for ultra-high-speed blowing according to the present invention, vortices are activated in the space formed by the baffles, as shown in Figures 6 and 7, and the discharge port It can be seen that the generation of vortices on the side is significantly reduced. In addition, it can be seen that the heating of air by the heating coil 100 is also relatively uniform.

The present invention described above has been described with reference to an example shown in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. will be. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

The specially structured heater for ultra-high-speed blowing according to the present invention can be widely applied to various industrial sites, drying agricultural products, heating facility cultivation complexes, and heating spaces to protect against moisture when exporting steel coils.

Claims

A baffle unit including a housing in which a heating chamber with an outlet is formed, and baffles having at least one air flow hole in the heating chamber and installed at predetermined intervals;

Electric heating coils installed between the baffles, respectively. It is installed in the housing and includes a main blower for blowing air into the heating chamber and at least one auxiliary blower for suppressing eddy currents in the air blown by the main blower. The hot air blower of the structure.
According to clause 1,

The baffles forming the baffle unit are composed of first, second, third, and fourth baffles, and the first baffle has a square first air flow hole formed on the upper side of the central portion, and circular second and third baffles on both sides of the first baffle. An air flow hole is formed, and a fourth air flow hole is formed on the lower side, which corresponds to the outlet of the main blower and is smaller than the second and third air flow holes,

The second baffle is formed larger than the first air flow hole and has a third air flow hole slanted from the center toward the bottom,

Curved incisions are formed on both sides of the third baffle to form sixth and seventh air flow holes on both sides of the heating chamber, and an eighth air flow hole is formed on the side corresponding to the first air flow hole,

A specially structured heater for ultra-high-speed blowing, characterized in that the fourth baffle is formed with a ninth ventilation hole formed in the vertical direction.
According to clause 2,

The heating chamber is a specially structured heater for ultra-high-speed blowing, characterized in that the heating chamber is provided with an inductive inclined portion formed by gradually reducing the cross-section of the air blown from the blower of the main blower toward the discharge port.
According to clause 1,

A specially structured heater for ultra-high-speed blowing, comprising a supporter installed on a frame on which the housing is supported, and a magnet unit installed on the supporter.
According to clause 1,

A specially structured heater for ultra-high-speed blowing, characterized in that at least one pair of heating coils is installed between the baffles.
According to clause 1,

A specially structured heater for ultra-high-speed blowing, characterized in that a discharge guide is installed on the outlet side of the heating chamber and a discharge port is formed at the end of the discharge guide.