KR101730890B1 - Plastic Heat Exchanger for Heat Recovery - Google Patents

Abstract

The present invention relates to a plastic heat exchanger for heat recovery including: multiple electric plates (10) formed of a plastic panel wherein multiple internal holes (11) are formed to be parallel to each other and vertically stacked up to arrange the holes (11) in the same direction at constant intervals; first spacers (20) forming internal holes (21) by being installed in left and right ends of spaces formed between the multiple plastic electric plates (10) vertically stacked up and arranged to form a right angle between the holes (21) formed in each of the first spacers (20) and the holes (11) formed in the electric plates (10); second spacers (30) installed in both vertical ends of the spaces formed between the multiple plastic electric plates (10) vertically stacked up while forming a right angle with the first spacers (20), having internal holes (31), and arranged to form a right angle between the holes (31) formed in each of the second spacers (30) and the holes (11) formed in the electric plates (10); multiple heat transmission promoting members (40) installed in spaces formed by the first spacers (20) and the second spacers (30) and promoting heat transmission by increasing a distance of an air flow and forming eddy currents. With the configuration, the plastic heat exchanger for heat recovery is capable of obtaining high heat transmission performance and structural durability. Accordingly, the economical plastic heat exchanger can be provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a plastic heat exchanger for heat recovery,

The present invention relates to a plastic heat exchanger for heat recovery, and more particularly to a plastic heat exchanger for heat recovery, and more particularly, to a plastic heat exchanger using a plastic panel for manufacturing a packaging container in which a plurality of holes are formed in parallel with each other, And a plastic heat exchanger for heat recovery which can maintain its structural integrity even when used for a long period of time.

Inside buildings such as buildings, schools, hospitals, theaters, etc., which are used by many people, an air conditioner or a thermo-hygrostat is installed to keep indoor air always pleasant and clean. Such an air conditioner or thermo-hygrostat . At this time, the air conditioner or the thermo-hygrostatemperature circulates inside the building, and some of the returned air is discharged to the outside of the building while introducing fresh outside air. In this process, the heated or cooled air is discharged to the outside in order to maintain a comfortable indoor temperature Therefore, the amount of heat discharged to the outside must be supplied again to the outside air or the outside air must be cooled again, so that the energy can not be used rationally.

In addition, when the indoor air is cooled by using an air conditioner or a thermo-hygrostat, air is passed through the cooling coil and the heating coil to cool, dehumidify and reheat the circulating air. At this time, Lowering the temperature of the cooled / dehumidified air, reheating the cooled / dehumidified air to raise the temperature, and then supplying the air to the room, so that a lot of heat energy is wasted.

In order to solve these problems, various schemes have been proposed for recovering and reusing the heat contained in the air (exhaust) discharged from a building and the air cooled / dehumidified. As an example thereof, Japanese Patent No. 10-0783616 And an exhaust heat recovery heat exchanger.

In the heat exchanger of the above patent, a plurality of heat transfer plates having different inlet / outlet directions are vertically stacked, and the indoor / outdoor air flows between the respective layers formed thereby to perform heat exchange between indoor and outdoor air in the process.

However, in the heat exchanger having the above-described structure, since the surface of the heat transfer plate forming the different layers is flat, the surface area of the heat transfer plate with which the outside air is in contact is small and the heat exchange efficiency is reduced. Further, the air flowing between the upper and lower heat transfer plates There is a problem that the heat exchange efficiency is further lowered.

In order to solve the problems of the conventional heat exchanger as described above, the present inventors have proposed a heat exchanger for exhaust heat recovery made of plastic through a patent No. 10-0991946. The heat exchanger has an inlet and an outlet A guide protrusion and an auxiliary protrusion are formed on the upstream side of the downstream side of the inlet and the outlet of the outlet, respectively, and upper and lower protrusions are formed on the upstream and downstream sides of the inlet and the outlet, respectively. Shaped air induction portions are formed in the middle inner side surfaces of the first and second heat transfer plates located at the first and second heat transfer plates and the assembly grooves are formed at the edges of the first and second heat transfer plates, The air flowing between the upper and lower heat transfer plates due to the structure flows countercurrently to each other so that the effective heat exchange efficiency is greatly improved The.

However, the plastic heat exchanger proposed in the above patent has an advantage of high thermal efficiency and low manufacturing cost compared with a heat exchanger made of aluminum, but it is difficult to form an assembly groove and is formed at the inlet side and the outlet side There is a problem in that not only the pressure loss in the assembly groove is large but also leakage occurs in the assembly portion and the pressure loss in the wavy air induction portion formed on the heat transfer surface is large and the flow rate in the inlet and outlet flow paths is not uniform, have.

Furthermore, in order to manufacture the heat exchanger having the above-described structure, a number of molding dies are required depending on the shape of the first and second heat transfer plates, the shape and size of the heat transfer promotion protrusions formed on the first and second heat transfer plates, The shape of the first and second heat transfer plates is distorted and the original manufacturing form of the heat exchanger can not be maintained.

KR 10-0991946 B1 KR 10-0783616 B1 JP 1997-511565 A JP 1996-121986 A

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems associated with the conventional heat recovery plastic heat exchanger, and it is an object of the present invention to provide a plastic heat exchanger for heat recovery which is low in manufacturing cost and promotes heat transfer, And to provide a heat recovery plastic heat exchanger capable of minimizing the deformation of the plastic heat exchanger.

It is an object of the present invention to provide a plastic heat exchanger having a plurality of heat transfer plates formed of a plastic panel in which a plurality of holes are formed in parallel with each other, A first spacing member arranged at each of left and right ends of a space formed between a plurality of plastic heat transfer plates stacked in an upper and a lower position and having holes formed therein and arranged so that the holes formed in the holes are perpendicular to the holes formed in the heat transfer plate; A plurality of plastic heat transfer plates stacked vertically at right angles to the first gap holding member and provided at both upper and lower ends of a space formed between the upper and lower ends of the space, A second gap retaining member provided on the second gap retaining member; And a plurality of heat transfer promotion members provided in the space formed by the first gap holding member and the second gap holding member to increase the flow length of the air and to form a vortex to promote heat transfer.

It is an object of the present invention to provide a plastic heat exchanger which comprises a plastic panel in which a plurality of holes are formed parallel to one another and a plurality of plastic panels are stacked one above the other, A plurality of heat transfer plates stacked to form a plurality of heat transfer plates; A first spacing member having an opening formed therein and having an inlet port and an outlet port formed at a lower right end and a left upper end, respectively, of a space formed between the upper and lower plastic heat transfer plates; A plurality of second spacing members provided in a horizontal direction at predetermined intervals so as to be able to connect the first spacing members arranged in parallel at left and right ends thereof and having holes formed therein; And a plurality of heat transfer promoting members provided in a space between adjacent second spacing members, the second spacing members being arranged such that the holes formed in the second spacing members and the holes formed in the heat transfer plate are parallel to each other ≪ / RTI >

Further, in the present invention, the plurality of heat transfer promoting members are arranged in the same manner for each of a plurality of spaces formed between the plurality of second space holding members, and the heat transfer promoting members arranged in the respective spaces are arranged parallel to each other .

Further, in the present invention, the plurality of heat transfer promotion members are arranged in the same manner for each of a plurality of spaces formed between the plurality of second space holding members, and the heat transfer promotion members arranged in the respective spaces form a plurality of rows, And the end portions of the heat transfer promoting members are arranged in a zigzag manner so as to face each other to form a continuous "V" shape.

In addition, the present invention is further characterized in that a plurality of heat transfer promotion members are arranged so that air does not flow through the interior.

The present invention is further characterized in that a plurality of heat transfer promoting members are arranged so that air flows inward through a plurality of holes each having air formed therein.

Further, in the present invention, the plurality of heat transfer promoting members are alternately arranged in a plurality of rows along the air flow direction, and the width of the heat transfer promoting member is formed to be smaller than the interval between the adjacent heat transfer promoting members, And the intervals between the rows of the promoting members are arranged to be larger than the intervals between the adjacent heat transfer promoting members, respectively.

The plastic heat exchanger according to the present invention can easily produce a heat exchanger having various structures because a heat exchanger is manufactured using a lightweight, easy-to-manufacture plastic panel commercially available in the market, and a heat exchanger It is possible to manufacture a heat exchanger having excellent heat exchange performance.

Further, according to the present invention, a heat exchanger having various sizes and shapes can be easily manufactured by changing the shape and size of the heat transfer plate and the first and second gap holding members.

Further, since the heat transfer plates stacked one above the other are firmly supported by the first gap holding member and / or the plurality of heat transfer promoting members, the shape of the first and second heat transfer plates is deformed even when the heat exchanger is used for a long period of time And thus the original shape of the heat exchanger is maintained.

In addition, the present invention is characterized in that a plurality of heat transfer promoting members are arranged alternately in plural rows along the flow direction of air to increase the flow length of the air, vortex and turbulence are generated at the front surface of the heat transfer promoting member, The heat is accelerated by flowing through the narrow gaps formed between the members, thereby promoting the heat transfer and greatly improving the heat exchange efficiency.

1 is a perspective view showing an example of a conventional plastic heat exchanger for heat recovery,
2 is a perspective view showing an example of a plastic heat exchanger for heat recovery according to the present invention,
3 is a perspective view showing an example of a first interval holding member, a second interval holding member, and a heat transfer promoting member provided between upper and lower heat transfer plates;
4 is a side view showing a hole formed in the heat transfer plate according to the present invention,
5 is a plan view showing an installation example of the heat transfer promoting member according to the present invention,
6 is a plan view showing another example of installation of the heat transfer promoting member according to the present invention,
7 is a plan view showing another embodiment of the plastic heat exchanger for heat recovery according to the present invention.

Hereinafter, the structure and operation of the present invention will be described in more detail with reference to the accompanying drawings, which show preferred embodiments.

The present invention provides a plastic heat exchanger for heat recovery which is capable of minimizing distortion such as distortion even when it is used for a long period of time while having a low manufacturing cost and is excellent in heat exchange performance. The first spacing members 20 and 20 'and the second spacing members 30 and 30' and the heat transfer promoting members 40 and 40 'as shown in FIG.

The heat conductive plates 10 and 10 'are made by cutting a plastic panel having a small thickness to an appropriate size. The heat conductive plates used in the present invention are formed by extruding a polypropylene coplymer resin into a corrugated paper The produced plastic panel (usually referred to as "danpla") is lightweight, has excellent chemical resistance, is excellent in elasticity maintenance and sound insulation effect, and is used mainly in the production of boxes for use in packaging containers or packaging. A plurality of holes 11 having a quadrangular cross section are formed in parallel with each other. In the present invention, a plastic panel (short plate) having such functions and structures is cut according to the size of a heat exchanger to be manufactured, The heat transfer plates 10 and 10 'are stacked up and down at regular intervals, and the heat transfer plates 10 and 10' When the preheating is arranged to form each of the heat transfer plate inside the same direction as the hole 11 formed in the (10, 10 ').

As described above, by using a plastic panel made of the same material and structure as the first gap holding members 20 and 20 ', the interval between the heat conductive plates 10 and 10' Not only the manufacturing is simplified but also the adhesion between the first and second spacing members 20 and 20 'and the heat transfer plates 10 and 10' is improved by applying an adhesive or the like between the first and second spacing members 20 and 20 ' It is possible to manufacture a more robust and robust heat exchanger.

The first spacing members 20 and 20 'are respectively provided on the left and right ends of the interval formed by the upper and lower heat transfer plates 10 and 10' Has a strip shape by cutting a plastic panel having the same structure as that of the heat conductive plates 10 and 10 'described above by a thin width in a direction perpendicular to the forming direction of the holes 21 formed therein.

The second spacing members 30 and 30 'are provided at both ends of the space formed between the heat transfer plates 10 and 10' stacked in the same vertical direction. The plastic panel having the same structure as that of the heat transfer plates 10 and 10 'is cut in the shape of a strip like the first gap holding members 20 and 20' except that the second gap holding members 30 and 30 ' Is formed by cutting a thin width in a direction perpendicular to the forming direction of the hole (31) formed therein.

A plurality of heat transfer promotion members 40 and 40 'are provided between the first gap holding members 20 and 20' and the second gap holding members 30 and 30 'provided in the space between the upper and lower heat transfer plates 10 and 10' The heat transfer facilitating members 40 and 40 'guide air flow when the air flows into the space formed between the upper and lower heat transfer plates 10 and 10' The heat transfer facilitating members 40 and 40 'are also used to promote the heat exchange between the heat transfer plates 10 and 10' and the air introduced into the heat transfer plates 10 and 10 ' When arranging them in the space between the first gap holding members 20 and 20 'and the second gap holding members 30 and 30', the plastic panels having the same structure as the first gap holding members 20 and 20 ' (40, 40 ') are arranged so as to be perpendicular to the air flow, and each of the heat transfer promotion members (40, 40' Are arranged alternately in plural rows along the air flow direction as shown in Fig. 5, so that the air flows in the sagittal direction.

As shown in FIG. 5, when the heat transfer promoting members 40 are arranged in a plurality of rows along the air flow direction so as to be staggered from each other, the flow length of the air increases, the horseshoe vortex is generated to accelerate the heat transfer and the air is accelerated while flowing through the narrow gaps formed between the heat transfer promoting members 40 to promote the heat transfer and as a result the heat exchange efficiency is greatly improved.

When arranging the plurality of heat transfer promoting members 40, the width w of the plurality of heat transfer promoting members 40 is controlled so that the flow resistance of air is not excessively increased by the heat transfer promoting member 40 as shown in FIG. The interval h between the rows of the plurality of heat transfer promoting members 40 is set to be smaller than the interval d between the adjacent heat transfer promoting members 40, (D).

In arranging the heat promoting members 40 and 40 'in the space between the first gap retaining members 20 and 20' and the second gap retaining members 30 and 30 ', as shown in FIG. 6 The end portions of the adjacent heat transfer promoting members 40 and 40 'may be arranged so as to face each other in a zigzag manner so as to form a continuous "V" -shaped shape, The plurality of heat transfer promotion members 40 and 40 'are arranged so that air can pass through the holes 41 formed in the plurality of heat transfer promotion members 40 and 40', respectively.

As shown in FIG. 6, when the heat transfer promoting members 40 are arranged in a plurality of rows in a continuous V shape, a uniform flow of air is formed and the boundary layer is periodically destroyed by the plurality of heat transfer promoting members 40 The heat transfer is promoted and the heat exchange efficiency is improved as a result.

The plastic heat exchanger for heat recovery according to the present invention having the above-described structure is constructed by arranging a first gap holding member (20, 20 ') and a second gap holding member (30, 30') on a space formed between upper and lower heat transfer plates And has two embodiments according to the arrangement thereof. Hereinafter, these will be described as one embodiment.

≪ Example 1 >

In the first embodiment, as shown in FIGS. 2 and 3, a plurality of quadrangular heat transfer plates 10 are stacked vertically at regular intervals, and a space formed between the upper and lower heat transfer plates 10 is provided at both left and right ends thereof When the first spacing members 20 are disposed at both ends of the interval formed between the heat transfer plates 10, the heat transfer plates 10 And the hole 21 formed in the first gap holding member 20 are perpendicular to each other.

As shown in FIG. 3, the second interval holding members 30 are arranged so as to be connected to both the front and rear ends of the spaces formed between the first interval holding members 20, that is, between the upper and lower heat transfer plates 10 The holes 21 of the second interval holding member 30 are perpendicular to the holes 11 formed in the heat transfer plate 10 and thus the holes 11 of the heat transfer plate 10 are spaced apart from the holes 11 of the heat transfer plate 10 The air flowing through the holes 21 and 31 of the members 20 and 30 flows in a cross flow.

In order to improve the heat exchange performance by forming a flow of air introduced through the holes 31 of the second interval holding member 30 on the space formed by the first and second spacing members 20 and 30, A heat transfer promotion member 40 is arranged and installed.

The air introduced by the structure and arrangement of the heat transfer plate 10, the first spacing member 20, the second spacing member 30 and the heat transfer promoting member 40 is introduced into the first gap holding member 20, The flow of the air is blocked by the side surface of the heat transfer plate 10 while the flow of the air is blocked by the second gap holding member 30 So that the air flowing along the inside and the outside of the heat transfer plate 10 are orthogonal to each other to form a cross flow.

In the above description, the second spacing members 30 are arranged at the front and rear ends of the space formed between the heat transfer plates 10 by stacking the second spacing members 30 at regular intervals. However, It is possible to connect the first gap holding members 20 on both the left and right ends by providing another second gap holding member 30 in the middle of the second gap holding members 30. In this case, The intermediate portion of the heat transfer plate 10 is supported more firmly, and the heat exchanger becomes structurally more robust.

≪ Example 2 >

In the second embodiment, as shown in FIG. 7, a plurality of rectangular heat conductive plates 10 'are stacked at predetermined intervals, and the space between the right lower and left upper ends of spaces formed between the heat conductive plates 10' The first gap holding member 20 'is formed so that the inlet A and the outlet B are formed at positions shifted from each other And a plurality of second spacing members 30 'are provided horizontally at predetermined intervals so as to be able to connect the first spacing members 20' arranged in parallel at left and right ends of the second spacing member 30 ' And a plurality of heat transfer promotion members 40 'are arranged in parallel with the second gap holding member 30' in a space between the first gap holding members 30 'and the second gap holding members 30' When the second gap holding member 30 'and the heat transfer promoting member 40' are arranged in the space formed between the second gap holding member 30 'and the second gap holding member 30' The hole 31 formed in the heat transfer plate 10 and the hole 11 formed in the heat transfer plate 10 'are arranged so as to be parallel to each other. The heat transfer facilitating member 40''Are arranged at right angles to each other, so that the air introduced into the heat exchanger through the inlet A Passes through the hole 31 formed in the second gap retaining member 30 'and then flows through the heat promoting member 40' and thereafter passes through the hole 31 formed in the second gap retaining member 30 ' After passing through the heat exchanger, the process of bypassing the heat promoting member 40 'is repeated and then discharged to the outside of the heat exchanger through the outlet B. In this heat exchanger, The heat exchange efficiency is significantly improved as compared with the cross flow type heat exchanger.

7, if the heat transfer promoting member 40 'is arranged so as to bypass the plurality of heat transfer promoting members 40' as shown in FIG. 7, the flow length of air is increased and the heat transfer promoting member Vortex and turbulence are generated at the front surface of the heat transfer member 40 'and the air is accelerated through the narrow gap formed between the heat transfer promoting members 40' to promote the heat transfer, thereby greatly improving the heat exchange efficiency.

The heat exchanger may be manufactured by joining the heat transfer plates 10 and 10 ', the first spacing members 20 and 20', the second spacing members 30 and 30 ', and the heat transfer promoting members 40 and 40' They are bonded to each other by applying an adhesive to their surfaces or by thermally welding them to each other.

INDUSTRIAL APPLICABILITY As described above, the present invention provides a heat exchanger using a plastic panel that is lightweight and has excellent chemical resistance, which is sold in the market, so that it is easy to manufacture, the manufacturing cost can be greatly reduced, And arranging various types of heat transfer promoting members in the space between the heat transfer plates to manufacture a heat exchanger having excellent heat exchange performance.

1: Heat exchanger 10, 10 ': Heat transfer plate
11: hole 20, 20 ': first interval holding member
21: hole 10, 30 ': second interval holding member
31: hole 40, 40 ': heat transfer promoting member
41: hole A: inlet
B: Outlet w: Width of promoting member
d: spacing between adjacent heat transfer promoting members
h: spacing between rows of heat transfer promoting members

Claims (7)

The plastic heat exchanger for heat recovery according to (1), wherein a plurality of plastic panels are stacked on top and bottom,
The heat exchanger (1) comprises a plastic panel in which a plurality of holes (11) are formed in parallel with each other, and a plurality of holes (11) A heating plate (10);
Holes 21 are formed in the left and right ends of a gap formed between the upper and lower plastic heat transfer plates 10 so that the holes 21 formed in the holes are formed in the holes formed in the heat transfer plate 10 A first spacing member 20 arranged to be perpendicular to the first spacing member 11;
A plurality of plastic heat transfer plates (10) stacked vertically at right angles to the first gap holding member (20), and provided at both upper and lower ends of an interval formed between the upper and lower plastic heat transfer plates A second spacing member (30) arranged such that the hole (31) is perpendicular to the hole (11) formed in the heat transfer plate (10);
A plurality of heat transfer promotion members (40) installed on the space formed by the first gap holding member (20) and the second gap holding member (30) to increase the flow length of air and to promote heat transfer by forming a vortex; Lt; / RTI >
The plurality of heat transfer promotion members (40) are arranged in the same manner for each of a plurality of spaces formed between the plurality of second interval holding members (30), and the heat transfer promotion member (40) And the end portions of the heat transfer promoting members (40) adjacent to each other are arranged in a zigzag manner so as to face each other to form a continuous "V" shape.
The plastic heat exchanger for heat recovery according to (1), wherein a plurality of plastic panels are stacked on top and bottom,
The heat exchanger (1) comprises a plastic panel in which a plurality of holes (11) are formed in parallel with each other, and a plurality of holes (11) A heat transfer plate 10 ';
The first space (A) and the second space (B) are formed at the lower right and upper left ends of the space formed between the upper and lower plastic heat transfer plates 10 ' A holding member 20 ';
A plurality of second spacing members 30 'are provided in the horizontal direction at predetermined intervals so as to connect the first spacing members 20' parallel to each other at left and right ends thereof, )Wow;
And a plurality of heat transfer promotion members (40 ') installed in a space between the adjacent second gap holding members (30'),
The second interval holding member 30 'is arranged such that the hole 31 formed in the second interval holding member 30' and the hole 11 formed in the heat transfer plate 10 'are parallel to each other Plastic heat exchanger for heat recovery.
The method of claim 2,
The plurality of heat transfer promotion members 40 'are arranged in the same manner for each of a plurality of spaces formed between the plurality of second interval holding members 30', and the heat transfer promotion member 40 'arranged in each space Wherein the heat exchanger is installed parallel to each other in a plurality of rows.
The method of claim 2,
The plurality of heat transfer promotion members 40 'are arranged in the same manner for each of a plurality of spaces formed between the plurality of second interval holding members 30', and the heat transfer promotion member 40 'arranged in each space Wherein the heat transfer facilitating members (40 ') are arranged in a zigzag manner so that the ends of the heat transfer facilitating members (40') adjacent to each other are arranged in rows so as to form a continuous "V" shape.
The method of claim 3,
Wherein the plurality of heat transfer promotion members (40 ') are arranged so that air does not flow through the inside thereof.
The method according to claim 1 or 4,
Wherein the plurality of heat transfer promotion members (40, 40 ') are arranged to flow inward through a plurality of holes (41) in which air is formed, respectively.
The method according to claim 1,
The plurality of heat transfer promoting members 40 are alternately arranged in a plurality of rows along the flow direction of the air and the width w of the heat transfer promoting member 40 is set such that the widths w of the heat transfer facilitating members 40 And the interval h between the rows of the plurality of heat transfer promoting members 40 is arranged to be larger than the interval d between the adjacent heat transfer promoting members 40 Wherein the heat exchanger is a heat exchanger.

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