KR20210033085A - Heating apparatus of air having fence for adjusting position - Google Patents

Abstract

The present invention provides an air heating apparatus having a position adjusting-type fence member, which reduces the temperature distribution difference within a heat collection space in which air flows and enhances the efficiency of heat transfer with the air flowing in the heat collection space to enhance heat collection performance. To this end, the present invention comprises: a duct body provided with an air flow path and having at least a part which is exposed to an external heat source; a blower providing transfer pressure of air passing the air flow path; a heat transfer plate disposed on the air flow path to be in contact with the air passing the air flow path, and heated by the heat transferred from the external heat source; a first fence member disposed to protrude from the surface of one side to an upper side based on a central line of the heat transfer plate; a second fence member disposed to protrude from the surface of the other side to an upper side based on the central line of the heat transfer plate; and a position adjustment unit changing the collision angle and the collision area of the air colliding against the first fence member and the second fence member while moving a first end of the first fence member and a second end of the second fence member which are neighboring each other.

Description

Air heating device with position-controlled fence member {HEATING APPARATUS OF AIR HAVING FENCE FOR ADJUSTING POSITION}

The present invention relates to an air heating device using sunlight, and more particularly, to an air heating device having a position-controlled fence member capable of improving heat transfer efficiency between a heat transfer plate that absorbs heat energy from sunlight and an air to be heated. About.

Due to the advancement of the industrial society and the increase of the population, a lot of energy is required, and the most used energy sources are fossil energy sources such as coal, petroleum and natural gas, but these energy sources are limited and are gradually depleted. However, the development of alternative energy sources is urgent because it has a great influence on global warming due to pollution. On the other hand, solar heat, unlike fossil energy sources, is a clean energy source that does not generate pollution and is supplied almost unlimitedly.Therefore, continuous research and commercialization to utilize solar energy as an energy source such as industrial or heating are being made.

A heating system using solar energy is a new renewable energy system that obtains hot water and heating energy by directly exchanging heat to a heat medium using solar heat, and is a new renewable energy system widely used because of its high efficiency and low initial investment cost.

However, the heating system using solar energy is limitedly used for hot water heaters that generate hot water using solar heat, and even that requires a professional installation, and has a disadvantage of high initial installation cost. Accordingly, recently, research on an air heating system that obtains energy by directly heating air using solar energy has been conducted.

The air heating system using solar energy has the advantage that the initial installation cost is low because it has a structure that simply introduces the collected outside air into the room under the influence of solar radiation heat, but it only aims to produce a heat source that is collected by solar radiation. However, there is a limit to insufficient energy production.

In addition, since the air heating system using solar energy has a structure in which air having fluidity is continuously transferred in the heat collection space, there is a problem that the heat transfer efficiency is low and the heat collection performance is very insufficient due to a large difference in temperature distribution inside the heat collection space. .

Accordingly, there is a need for an air heating device using solar heat having excellent heat collection performance, which can reduce the difference in temperature distribution inside the heat collection space and increase heat transfer efficiency.

Japanese Unexamined Patent Publication No. 2003-314901 (published on November 6, 2003)

An object of the present invention is to solve the conventional problem, the present invention is to reduce the difference in temperature distribution inside the heat collecting space through which air flows, and improve the heat transfer efficiency with the air flowing inside the heat collecting space, thereby improving heat collection performance. It is to provide an air heating device having a position-adjustable fence member.

In order to achieve the above-described object of the present invention, an air heating apparatus having a position-adjustable fence member according to an embodiment of the present invention includes: a duct body having an air passage and at least partially exposed to an external heat source; A blower for providing a conveying pressure of air passing through the air flow path; A heat transfer plate disposed on the air flow path, in contact with the air passing through the air flow path, and heated by heat transferred from the external heat source; A first fence member disposed to protrude from an upper side from one surface of the heat transfer plate based on a center line; A second fence member disposed to protrude from the upper side from the other side surface with respect to the center line of the heat transfer plate; And changing the collision angle and collision area of the air colliding with the first fence member and the second fence member while moving the first end of the adjacent first fence member and the second end of the second fence member. It characterized in that it comprises a; position control unit.

In addition, in the air heating apparatus having a position-adjustable fence member according to an embodiment of the present invention, the first fence member and the second fence member may maintain a V (V) shape.

In addition, in the air heating apparatus having a position-adjustable fence member according to an embodiment of the present invention, the position control unit, the supporter frame coupled to the central installation groove of the heat transfer plate; A screw member provided in a longitudinal direction of the heat transfer plate and rotatably coupled to the supporter frame; A driving unit that rotates the screw member; A moving block that is screwed with the screw member and moved on the screw member according to the rotation of the screw member; And a rotation connection part coupled to the movable block and rotatably connecting the first end and the second end.

In addition, in the air heating apparatus having a position-adjustable fence member according to an embodiment of the present invention, a first step portion having a first through hole may be provided at the first end, and the first step difference may be provided at the second end. A second stepped portion having a second through hole that is coupled with the first through hole may be provided, and the rotation connecting portion is the movable block while passing through the first through hole and the second through hole. It may include a connection pin coupled to.

In addition, in the air heating apparatus having a position-adjustable fence member according to an embodiment of the present invention, the first rotation support portion for rotatably supporting the other end of the first fence member while the first end is moved; And a second rotation support part rotatably supporting the other end of the second fence member while the second end is moved.

In addition, in the air heating apparatus having a position-adjustable fence member according to an embodiment of the present invention, one end of the first rotation support part is rotatably coupled to the heat transfer plate, and the other end is the other end of the first fence member slides. It may include a first guide holding member coupled to be possible, the second rotation support portion is rotatably coupled to the heat transfer plate at one end, and the other end is a second end portion of the second fence member slidably coupled It may include a guide holding member.

In addition, in the air heating apparatus having a position-adjustable fence member according to an embodiment of the present invention, it is preferable that the first fence member and the second fence member maintain an inclination angle of 60 degrees with respect to the center line of the heat transfer plate.

According to an embodiment of the present invention, it is possible to improve heat transfer efficiency by reducing the difference in temperature distribution inside the heat collecting space and forming a turbulent airflow of the flowing air through the fence member that controls the air flow inside the duct body as the heat collecting space. .

According to an embodiment of the present invention, the heat collecting performance can be further improved by varying the collision angle and the collision area with the air through the position-adjustable fence member for controlling the air flow.

1 is an exemplary view of an air heating apparatus according to an embodiment of the present invention.
FIG. 2 is an exemplary plan view of the heat transfer plate and fence member shown in FIG. 1.
3 is an exemplary cross-sectional view of the heat transfer plate and fence member shown in FIG. 1.
4 is a view for explaining heat transfer characteristics according to the presence or absence of a fence member according to the present invention.

Hereinafter, preferred embodiments of the present invention in which the above-described problem to be solved can be realized in detail will be described with reference to the accompanying drawings. In describing the present embodiments, the same name and the same reference numeral may be used for the same configuration, and additional description accordingly may be omitted.

1 is an exemplary view of an air heating device according to an embodiment of the present invention, FIG. 2 is a plan view of the heat transfer plate and fence member shown in FIG. 1, and FIG. 3 is a heat transfer plate and fence member shown in FIG. It is an exemplary cross-sectional view of.

1 to 3, the air heating apparatus according to the embodiment of the present invention includes a duct body 10, a blower 20, a heat transfer plate 30, a fence member 40, and a position control unit 50. Can include.

The duct body 10 provides a space for air heating, and is provided with an air inlet 14a and an air outlet 15a, and an air passage connecting the air inlet 14a and the air outlet 15a in the inner space (13) may be provided.

The duct body 10 allows air passing through the air passage 13 to be heated by the external heat source 1 and is disposed to be directly exposed to the external heat source 1.

The external heat source 1 may be applied to various industrial waste heat or renewable energy, preferably solar light.

When sunlight is used as the external heat source 1, the duct body 10 may maintain a state in which at least a portion of the duct body 10 is directly exposed to sunlight. For example, while forming a part of the duct body 10, the transparent wall part 11 through which sunlight is transmitted, and the other remaining part of the duct body 10 are formed to maintain heat insulation between the internal space and the external space. It may include an insulating wall portion 12.

Glass may be applied to the permeable wall portion 11, and the heat insulating wall portion 12 may be selectively applied from various types of insulating materials that are already known techniques.

When glass is applied as the permeable wall part 11, the use state of the heat transfer plate 30, which will be described later, can be easily checked from the outside, thereby providing convenience for maintenance of the heating device.

The blower 20 may be connected to the air inlet 14a or the air outlet 15a, and may provide a conveying pressure of air passing through the air oil of the duct body 10.

According to the embodiment, the blower 20 is connected to the air outlet 15a of the duct body 10 and the transfer pipe 21, and thus, the air inlet 14a to the inside of the duct body 10 Air may be introduced, and heated air discharged through the air outlet 15a may be provided to a place of use at a constant transfer pressure.

As shown, on the conveying pipe 21, a pressure gauge 22 for measuring the conveying pressure of air, and a flow valve 23 controlling the flow rate of air based on the conveying pressure of air measured by the pressure gauge 21 May be provided. Accordingly, it is possible to more effectively supply heated air to the place of use, and to efficiently operate the heating device according to the capacity of the heated air consumed at the place of use.

In addition, a bellows-shaped expansion joint 24 may be provided on the transport pipe 21, and according to an embodiment, the air outlet 15a of the duct body 10 and the transport pipe 21 are the expansion joint pipe 24. ). Accordingly, it is possible to supply heated air in various directions regardless of the installation position of the heating device, and it is possible to install and operate the heating device even in a narrow place.

The heat transfer plate 30 raises the temperature of air through direct heat transfer with the air passing through the air passage 13, and is disposed in the inner space of the duct body 10 so that it comes into contact with the air passing through the air passage 13. Can be installed.

The heat transfer plate 30 may be made of a material having excellent thermal conductivity, and may be made of a material having excellent heat absorption so that it can be heated by heat transferred from the external heat source 1. Alternatively, the heat transfer plate 30 may be formed by coating a material having excellent heat absorption and thermal conductivity on its surface.

When sunlight is used as the external heat source 1, the heat transfer plate 30 may be disposed under the transparent wall portion 11 so that the upper surface is exposed to sunlight passing through the transparent wall portion 11. Accordingly, the air flow passage 13 inside the duct body 10 has a lower inlet passage 14 connected to the air inlet 14a with the heat transfer plate 30 at the center, and the upper outlet connected to the air outlet 15a. It can be divided into a flow path (15).

That is, the duct body 10 may have an air passage 13 in which the lower inlet passage 14 and the upper outlet passage 15 are stacked and arranged based on the heat transfer plate 30. Accordingly, the air introduced into the air inlet 14a is transported along the lower inlet passage 14 formed by the lower surface of the heat transfer plate 30 and the insulating wall portion 12, and then transported to the upper side, and then heat transfer. The upper surface of the plate 30 and the permeable wall 11 may be transported along the upper outlet passage 15 formed by the permeable wall 11 and then discharged through the air outlet 15a.

The fence member 40 is for further promoting a temperature increase of the air passing through the air passage 13 and may be disposed to protrude upward from the surface of the heat transfer plate 30.

The fence member 40 may be provided to have the same cross-section in the width direction of the air passage 13. The cross section of the fence member 40 may be provided in various shapes, and may be formed in a polygonal shape including a triangle and a square, as well as a semicircle and a circular shape.

A plurality of fence members 40 may be disposed spaced apart at predetermined intervals along the air transport direction.

Like the heat transfer plate 30, the fence member 40 may be made of a material having excellent heat absorption and thermal conductivity.

The fence member 40 may be disposed over the entire surface of the heat transfer plate 30, that is, over all areas of the upper and lower surfaces, and may be disposed only in a partial area of the upper or lower surface.

According to the embodiment, the lower inlet passage 14 and the air outlet 15a connected to the air inlet 14a around the heat transfer plate 30 through the heat transfer plate 30 provided under the permeable wall 11 ), the fence member 40 may be disposed only on the upper surface of the heat transfer plate 30.

The fence member 40 may change the flow of air flowing along the surface of the heat transfer plate 30 to increase heat transfer between the heat transfer plate 30 and the air.

Specifically, air passing through the surface of the heat transfer plate 30 on which the fence member 40 is protruded may increase heat transfer by increasing the contact area with the heat transfer plate 30 including the fence member 40.

In addition, the air passing through the surface of the heat transfer plate 30 forms a turbulence in the process of passing through the fence member 40, and the heat transfer plate 30 and the fence member 40 ) And the heat transfer between the air can be increased. In addition, since convection is induced in the process of air passing through the fence member 40, a difference in temperature distribution of the air passing through the air passage 13 can be reduced. As a result, the temperature of the air discharged from the air outlet 15a can be further increased.

Meanwhile, the fence member 40 according to the embodiment may include a first fence member 41 and a second fence member 42.

The first fence member 41 may be provided in the width direction of the heat transfer plate 30, and may be disposed to protrude upward from one upper surface of the heat transfer plate 30 with respect to the center line of the heat transfer plate 30. A plurality of the first fence members 41 may be provided in the air transport direction, and the plurality of first fence members 41 may be disposed to be spaced apart at predetermined intervals.

The second fence member 42 may be provided in the width direction of the heat transfer plate 30, and may be disposed to protrude upward from the other upper surface based on the center line of the heat transfer plate 30. A plurality of the second fence members 42 may be provided in the air transport direction, and the plurality of second fence members 42 may be disposed to be spaced apart at predetermined intervals.

The first fence member 41 and the second fence member 42 may be arranged in a row with respect to the width direction of the heat transfer plate 30, and the position may be changed according to the operation of the position control unit 50.

The positioning unit 50 according to the embodiment may connect the first end 411 of the first fence member 41 and the second end 421 of the second fence member 42 to each other, and the first fence The collision of air colliding with the first fence member 41 and the second fence member 42 while moving the first end 411 of the member 41 and the second end 421 of the second fence member 42 You can change the angle and impact area.

First, the other end of the first fence member 41 and the heat transfer plate 30 may be connected to the first rotation support part 61, and the other end of the second fence member 42 and the heat transfer plate 30 are rotated for a second time. It may be connected to the support 62.

The first rotation support part 61 according to the embodiment has one end rotatably coupled to the heat transfer plate 30, and the other end is a first guide holding member 611 to which the other end of the first fence member 41 is slidably coupled. ) Can be included.

One end of the first guide holding member 611 may be coupled through the heat transfer plate 30 and the bearing member 612, and the other end has a through hole so that the other end of the first fence member 41 can be slid through. Can be formed. Accordingly, while the first end 411 of the first fence member 41 is linearly moved in conjunction with the moving block 54, the other end of the first fence member 41 is the first guide holding member 611 The slide can be moved in the longitudinal direction on the top. Indication number 613 is fixedly fastened to the lower surface of the heat transfer plate 30 to fix the first guide holding member 611 and the bearing member 612 to fix and support the first guide holding member 611 and the bearing member 612 It is an installation frame 613.

The second rotation support part 62 according to the embodiment includes a second guide holding member whose one end is rotatably coupled to the heat transfer plate 30 and the other end is slidably coupled to the other end of the second fence member 42 can do. The second guide holding member may have one end coupled to the heat transfer plate 30 and the bearing member as a medium, and the other end may have a through hole formed to allow the second fence member 42 to slide through the other end. The second rotation support part 62 may be configured in the same manner as the first rotation support part 61 described above, and a related redundant description will be omitted.

Accordingly, while the first end 411 of the first fence member 41 and the second end 421 of the second fence member 42 are moved through the position control unit 50, the first rotation support part ( The other end of the first fence member 41 connected to 61) and the other end of the second fence member 42 connected to the first rotation support part 61 are the first fence member 41 and the second fence member 42 Stable rotation motion can be guided while the position of the is adjusted.

Subsequently, the position control unit 50 may include a supporter frame 51, a screw member 52, a driving part 53, a moving block 54, and a rotation connection part 55.

The supporter frame 51 may be coupled to a central installation groove installed on the center line of the heat transfer plate 30, and may be provided in the length direction of the heat transfer plate 30.

The screw member 52 may be provided in the longitudinal direction of the heat transfer plate 30 and may be rotatably coupled to the supporter frame 51. A threaded portion may be formed on the outer circumferential surface of the screw member 52.

The driving part 53 may be coupled to one end of the screw member 52 to rotate the screw member 52. The driving unit 53 may be applied with a rotation motor.

The movable block 54 is provided with a through hole penetrating the screw member 52, and a threaded portion that is screwed with the threaded portion of the screw member 52 may be formed on the inner circumferential surface of the through hole. Accordingly, the movement block 54 may be moved in the longitudinal direction on the screw member 52 according to the rotation of the screw member 52.

The rotation connection part 55 is coupled to the movable block 54 and may rotatably connect the first fence member 41 and the second fence member 42 to each other. The rotation connection part 55 according to the embodiment may include a connection pin 551.

The first end portion 411 of the first fence member 41 may be provided with a first step portion in which a first through hole is formed, and a second through hole is formed at the second end 421 of the second fence member 42. The formed second step portion may be provided. Accordingly, the first end 411 of the first fence member 41 and the second end 421 of the second fence member 42 adjacent to each other are overlapped with each other by the first step portion and the second step portion. It may be connected, and the first through hole and the second through hole may be matched in the overlapping state.

At this time, the connection pin 551 may pass through the first through hole and the second through hole, and a tip of the through hole may be coupled to the moving block 54.

Accordingly, the first end 411 of the first fence member 41 and the second end 421 of the second fence member 42 are interlocked with the moving block 54 to move in a straight line. ) Can be rotated independently.

Supplementary description of the operation process of the position control unit 50 is as follows.

When the screw member 52 is rotated according to the operation of the driving unit 53, the moving block 54 screwed with the screw member 52 is moved on the screw member 52 in the longitudinal direction of the screw member 52 , The first end 411 of the first fence member 41 connected to the moving block 54 and the second end 421 of the second fence member 42 are also moved together.

At this time, the other ends of the first fence member 41 and the second fence member 42 are constrained to the first rotation support part 61 and the second rotation support part 62, respectively, so that the center line of the heat transfer plate 30 As a reference, the inclination angle corresponding to (-a) of the first fence member 41 may be adjusted, and the inclination angle corresponding to (+a) of the second fence member 42 may be adjusted.

The first fence member 41 and the second fence member 42 whose inclination angles are adjusted in this way may maintain a V (V) shape on the plane of the heat transfer plate 30.

In this way, the first fence member 41 and the second fence member 42 maintain the inclination angle (a) obliquely with respect to the air transport direction, the first fence member 41 and the second fence member 42 ) Are arranged in a row and the collision angle and the collision area of the air colliding with the first fence member 41 and the second fence member 42 are changed compared to a state that is orthogonal to the air transport direction.

That is, when the inclination angle (a) of the first fence member 41 and the second fence member 42 increases and the collision area with air increases, the contact area with the air flowing along the surface of the heat transfer plate 30 is increased. It is further increased, and heat transfer may be improved, and turbulence of air passing through the first fence member 41 and the second fence member 42 may be more activated. Accordingly, a difference in temperature distribution inside the air flow path 13 may be reduced, and heat transfer efficiency between the heat transfer plate 30 and the fence member 40 and air may be further improved.

Meanwhile, the position control unit 50 may allow the first fence member 41 and the second fence member 42 to continue to maintain a certain inclination angle (a) during the heating process of air, or during the heating process of air. The positions of the first fence member 41 and the second fence member 42 may be continuously varied. In other words, the first fence member 41 and the second fence member 42 while repeatedly reciprocating the first fence member 41 and the second fence member 42 with respect to the conveying direction of air during the heating process of air. The inclination angle (a) of can be continuously varied.

When the positions of the first fence member 41 and the second fence member 42 are continuously changed during the heating process of air, turbulence of the air flowing along the surface of the heat transfer plate 30 can be further activated. Accordingly, the difference in temperature distribution of the air passing through the air passage 13 may be reduced, and the temperature of the air discharged from the air outlet 15a may be further increased.

4 is a view for explaining the heat transfer characteristics according to the presence or absence of the fence member according to the present invention, in the case of the absence of the fence member and the presence of the fence member, the Reynolds number (horizontal axis) and Nusselt number ( This is a graph showing the relationship of the vertical axis).

First, referring to Figure 4 (a), compared to the case without the fence member 40 as a whole shows a high Nusselt number in the case of the V (V)-shaped fence member 40, it is confirmed that the heat transfer characteristics are improved. I can.

In addition, referring to Figure 4 (b), by varying the inclination angle (a) of the V-shaped fence member 40, the relationship between the Reynolds number and the Nusselt number of air passing through the air channel 13 As a result of the experiment, it can be seen that maximum heat transfer occurs when the inclination angle (a) of the fence member 40 is 60 degrees.

This means that when the inclination angle (a) of the fence member 40 is 60 degrees, the turbulence caused by the fence member 40 becomes most active, and accordingly, the thermal conductivity between the fence member 40 and the heat transfer plate 30 and the air is improved. Because it became.

At this time, the relative height (e/D) of the fence member 40 was set equal to 0.02m, and the relative height (e/D) of the fence member 40 was It means the height (e) of the fence member 40 with respect to the height (hydraulic diameter).

As described above, preferred embodiments of the present invention have been described with reference to the drawings, but those skilled in the art will variously modify the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. Can be modified or changed.

10: duct body 20: blower
30: heat transfer plate 40: fence member
41: first fence member 42: second fence member
50: positioning unit 55: rotation connection
61: first rotation support part 62: second rotation support part

Claims (7)

A duct body provided with an air passage and at least partially exposed to an external heat source;
A blower for providing a conveying pressure of air passing through the air flow path;
A heat transfer plate disposed on the air flow path, in contact with air passing through the air flow path, and heated by heat transferred from the external heat source;
A first fence member disposed to protrude from an upper side from one surface of the heat transfer plate based on a center line;
A second fence member disposed to protrude from an upper side from the other side surface with respect to the center line of the heat transfer plate; And
Position for changing the collision angle and collision area of the air colliding with the first fence member and the second fence member while moving the first end of the adjacent first fence member and the second end of the second fence member Air heating apparatus having a position-adjustable fence member comprising a; control unit. The method of claim 1,
The air heating apparatus having a position-adjustable fence member, characterized in that the first fence member and the second fence member maintain a V (V) shape. The method of claim 1,
The position control unit,
A supporter frame coupled to the central installation groove of the heat transfer plate;
A screw member provided in a longitudinal direction of the heat transfer plate and rotatably coupled to the supporter frame;
A driving unit that rotates the screw member;
A moving block that is screwed with the screw member and moved on the screw member according to the rotation of the screw member; And
And a rotation connection part coupled to the movable block and rotatably connecting the first end and the second end. The method of claim 3,
A first step portion having a first through hole is provided at the first end,
The second end portion is provided with a second step portion coupled to the first step portion and formed with a second through hole coinciding with the first through hole,
The air heating apparatus having a position-adjustable fence member, wherein the rotation connection part includes a connection pin that is connected to the moving block while passing through the first through hole and the second through hole. The method of claim 3,
A first rotation support part rotatably supporting the other end of the first fence member while the first end is moved; And
And a second rotation support part for rotatably supporting the other end of the second fence member while the second end is moved. The method of claim 5,
The first rotation support portion includes a first guide holding member having one end rotatably coupled to the heat transfer plate and the other end slidably coupled to the other end of the first fence member,
The second rotation support portion is a position-adjustable fence member, characterized in that one end is rotatably coupled to the heat transfer plate and the other end includes a second guide holding member to which the other end of the second fence member is slidably coupled Air heating device having a. The method of claim 1,
The air heating apparatus having a position-adjustable fence member, wherein the first fence member and the second fence member maintain an inclination angle of 60 degrees with respect to the center line of the heat transfer plate.

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