KR20150144965A - Frame structure of air-to-air heat exchanger - Google Patents

Abstract

Disclosed are a frame structure of an air-to-air heat exchanger and a heat exchanger having the same. The frame structure of an air-to-air heat exchanger comprises: a pair of plates separated from each other, arranged in parallel with each other, and made of a synthetic resin material; a plurality of guide members which are arranged perpendicularly to the plates, connect corner portions of the plates corresponding to each other, and are made of a synthetic resin material; and a plurality of joints mounted on the corner portions of the plates to fixate the plates onto the guide members. A bent unit and an indented unit are formed on the plates to greatly increase hardness, and an air layer is formed between heat exchange elements to obtain a heat insulation effect. A plurality of grooves formed inside and outside the guide members improve hardness and increase thermal resistance to greatly reduce heat conducted through cross sections of the guide members.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to air-to-air heat exchangers,

The present invention relates to the construction of an air-to-air heat exchanger, and more particularly to an outer frame structure of an air-to-air heat exchanger.

Recently, the importance of heat exchanger has become more important as interest in energy saving has increased. Heat exchangers have been used in various industrial fields, and their use frequency has been greatly increased in the construction field.

Sufficient ventilation is required for a healthy indoor environment, but in modern architecture, the amount of ventilation due to natural ventilation is very small, and recently, the minimum ventilation amount has been legally set.

At this time, in order to minimize the loss of cooling energy and heating energy necessarily caused by the ventilation, a waste heat recovery type ventilation device is used, and the waste energy is recovered to contribute to energy saving.

A known air-to-air heat exchanger generally has a structure as shown in Fig. As shown in FIG. 1, the frame of the air-to-air heat exchanger surrounds the outside of the heat-exchanging element.

Except for the performance related to the heat exchange efficiency of the heat exchange element, the improvement in quality and function of the air-to-air heat exchanger can be derived from the frame in most cases, and therefore the frame is a very important factor in the overall performance and quality of the air- .

The frame of a known air-to-air heat exchanger is divided into several depending on its material.

When a metal frame is used, there is an advantage that a sufficient rigidity for protecting the heat exchanging element can be secured. However, there is a problem that the metal frame is corroded due to the condensation of water generated during the heat exchange process of air to air, and when the expansion or contraction due to heat or moisture of the heat exchanger due to the large rigidity, There is a problem that sealing damage is caused to maintain the airtightness.

In addition, since the heat transfer performance of the metal frame is superior to that of the polymer frame, there is a problem that condensation is generated on the surface of the frame separately from the condensation generated in the heat exchanging element due to heat transfer through the frame. Condensation is a factor promoting corrosion.

On the other hand, since the metal frame is heavier than the polymer, the metal frame is disadvantageous in weight reduction, and the cost is increased by using a metal having a higher price than the polymer material.

On the other hand, air-to-air heat exchangers having a frame made of a known polymer material can largely solve the problems of the metal frame, but have a problem that they are easily broken or deformed even with a small impact from the outside due to the relatively low rigidity.

In the case of such a polymer frame, in order to maintain the heat insulation performance and the airtightness, it is often the case that the upper and lower surfaces are assembled by attaching a nonwoven fabric (felt type) or by attaching paper. Or when it is finished with paper, there is a problem in that the overall stiffness is lowered, and there is a weak point in the water. In addition, there is a problem that a breakage occurs in a corresponding region in the process of desorption of the heat exchange element for maintenance.

The polymer frame can lower the material cost significantly compared to the metal frame, but it is disadvantageous to automation because all the processes are performed by the bonding method in the assembly process, and the final amount of the air-to-air heat exchanger finished product is considerably lower than that of the metal frame Do not.

Air-to-air heat exchangers, on the other hand, are designed to meet a number of requirements, such as sealing and physical protection of the edge of the element during frame design, suppression of heat transfer through the frame, and blockage of airflow through the inner or outer walls of the frame. .

FIG. 2 is a view showing an airflow direction of an air-to-air heat exchanger according to a general prior art, and FIG. 3 is an enlarged view of a heat exchange element inserted into a frame.

As shown in FIG. 2, it can be seen that the cold air flow and the warm air flow intersect at right angles with respect to the heat exchanging element. The heat exchange elements have an intake flow path and an exhaust flow path which are formed by stacking a plurality of heat exchange elements in directions orthogonal to each other.

However, as shown in Fig. 3, the corner portions of the intake and exhaust passages are not constantly blocked or opened in accordance with the stacked order.

Thus, the frame must be structurally sealed so that the corner portions of the heat exchange element are adequately sealed, but physically protected. Otherwise, the air-air mixture of the air supply air and the exhaust air may be mixed and the overall performance of the air-to-air heat exchanger may be deteriorated drastically.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems,

A frame structure of an air-to-air heat exchanger capable of solving the problem of condensation and corrosion of a metal frame and a heat exchanger having the same.

Another object of the present invention is to provide a frame structure of an air-to-air heat exchanger capable of improving the price competitiveness of a product by simplifying a product manufacturing process and a heat exchanger having the same.

It is still another object of the present invention to provide a frame structure of an air-to-air heat exchanger using a polymer material and capable of realizing sufficient stiffness for protecting an air-to-air heat exchanger and a heat exchanger having the same.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an air-to-air heat exchanger comprising: a pair of plate members made of a synthetic resin material,

A plurality of guide members provided in a direction orthogonal to the pair of plate members and connected to corresponding corner portions of the pair of plate members,

And a plurality of joints fastened to corner portions of the plate member to fix the guide member and the plate member.

At this time, a joint fastening hole is formed in a corner portion of the plate material,

The guide member is elongated in the longitudinal direction and has a shape in which the inner side is bent at a right angle, and a first groove recessed inward along the longitudinal direction is formed.

At least a part of the plurality of joints includes a joint body, a first coupling protrusion protruding from the joint body by a predetermined length, and a second coupling protrusion. The first coupling protrusion is inserted into the joint coupling hole and fixed And the second engaging projection is inserted and fixed in the first groove.

In order to achieve the above object, an air-to-air heat exchanger according to the present invention includes a frame structure as described above, and a heat exchange element mounted in the frame structure, the heat exchange element having a plurality of cross- do.

According to the present invention,

By using a polymer material, problems of condensation and corrosion of a known metal frame can be solved,

It is possible to solve the problem of the detachment of the known polymer frame, the problem of breakage at the time of replacement of the heat exchanging element, and the problem of insufficient rigidity by the optimized fastening structure of the joint, the plate member and the guide member.

In addition, there is an effect that the manufacturing cost can be greatly reduced by simplifying the manufacturing process of the polymer frame by the adhesion method.

On the other hand, with respect to the structure of each member,

It is possible to greatly reduce the contact area between the inner surface of the plate material and the heat exchanging element and to form an air layer inside the plate material.

In addition, by bending the plate member to form the outer bent portion and the depressed portion, it is possible to secure sufficient rigidity to withstand lateral pressure.

By forming a plurality of grooves on the inner side and the outer side of the guide member, the heat resistance is increased, and the amount of heat transferred through the end face of the guide member is greatly reduced.

The joint is designed so that the stress generated when the plate member and the guide member are coupled with each other by the shear stress has an effect of having a large bonding force even with the low stiffness of the polymer material.

1 is a reference view showing the outline of a known air-to-air heat exchanger,
Fig. 2 is a view showing the air flow direction of the intake air flow path and the exhaust air flow path of the known air-to-air heat exchanger,
3 is an enlarged view of a corner portion of the heat exchange element,
4 is a view for explaining a process of assembling a joint, a guide member and a plate material,
5 is a view for explaining the outline of the air-to-air heat exchanger frame structure according to an embodiment of the present invention,
6 is a view for explaining a structure of a joint,
7 is a view for explaining the structure of the guide member,
8 is a view for explaining the structure of the plate material,
9 is a view for explaining a modification example for reinforcing the rigidity of the plate material,
10 is a view showing a form in which a plate member and a guide member are joined by a joint,
11 is a view for explaining sealing by the frame structure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, the present invention will be described in detail with reference to preferred embodiments of the present invention and the accompanying drawings, wherein like reference numerals refer to like elements.

It is to be understood that when an element is referred to as being "comprising" another element in the description of the invention or in the claims, it is not to be construed as being limited to only that element, And the like.

Hereinafter, a frame structure of the air-to-air heat exchanger according to the present invention and an air-to-air heat exchanger having the same will be described with reference to the accompanying drawings.

FIG. 4 is a view for explaining a process of assembling a joint, a guide member and a plate material, and FIG. 5 is a view for explaining the outline of the frame structure of the air-to-air heat exchanger according to an embodiment of the present invention.

The air-to-air heat exchanger according to the present invention comprises a frame structure 100 as shown in FIG. 5, a heat exchange element (not shown) having a plurality of intake and exhaust flow paths, which are mounted in the frame structure 100, .

The frame structure 100 has a pair of upper and lower plates 110, as shown in Fig.

The plate 110 has the same planar surface as a single channel of the heat exchanger element and is designed to have sufficient stiffness to protect the air-to-air heat exchanger and to prevent damage to the heat exchanger upon removal.

For this purpose, as described later, the reinforcement is performed on the plane, and the structure in which the mixture of the exhaust air and the supply air is not generated is maintained as described later.

Preferably, the pair of plate members 110 have the same area and are arranged in parallel with each other. The pair of plate members 110 may have completely the same shape depending on the implementation. And may preferably have a rectangular shape as illustrated in Fig.

Meanwhile, the pair of plate members 110 are supported by a plurality of guide members 120.

The guide member 120 is preferably provided at each corner of the upper and lower plate members 100 in a direction perpendicular to the plate member 100 and fixed by being fastened by the joint 300.

The guide member 120 has a shape of an L beam extending long in the longitudinal direction. As shown in the example of FIG. 4, four guide members 120 may be provided to support the respective edges of the rectangular plate member 110.

The joint 130 is provided twice as many as the number of the vertexes of the plate 110 and twice as many as the number of the guide members 120. The joint 130 penetrates through the plate 110, And is fixed to one end of the guide member 120.

4, the guide member 120 is placed in an orthogonal direction below the corner of the plate 110, and the joint 130 is shrink-fitted to the plate member 110 and the guide member 120 120 are fixed in an orthogonal state.

The frame structure 100 as shown in FIG. 5 is assembled by assembling each corner of the pair of plate materials 110 in this manner.

Air-to-air heat exchanger is manufactured by assembling the frame structure 100 with the heat exchange element inserted therein.

As the heat exchanging element, a known one having a plurality of cross-laminated intake flow paths and exhaust flow paths can be used.

A feature of the present invention resides in the shape and fastening structure of the plate 110, the guide member 120, and the joint 130, and the structure and fastening structure of each member will be described in detail with reference to FIGS. .

Fig. 6 is a view for explaining a structure of a joint, Fig. 7 is a view for explaining a structure of a guide member, and Fig. 8 is a view for explaining the structure of a plate material.

6, the joint 130 includes a first coupling protrusion 132, a second coupling protrusion 133, and a third coupling protrusion (not shown) on a joint body 131 having three mutually orthogonal surfaces, 134 are protruded and formed.

The joint body 131 may have a shape in which three adjacent sides of the cube are opened, as illustrated in FIG. 6, and may be seated on a corner of the plate 110 as described later, And the height is kept constant up to the edge of the corner, thereby contributing to improvement of airtightness.

On the other hand, the joint body 131 has a shape capable of sufficiently securing the hermeticity according to the shape of the plate member 110 to be coupled. 6 (a), an upper surface depression 1311 may be formed on the upper surface of the joint body 131, for example, a portion corresponding to the joining direction of the plate 110 is partially cut to be inwardly recessed have.

The first coupling protrusions 132 protrude from one end of the inner surface of the joint body 131 by a predetermined length.

The first engaging projection 132 has a first engaging projection head 1321 tapered at an end thereof.

The first coupling protrusion 132 may have a cylindrical shape, and the first coupling protrusion head 1321 at the upper end of the first coupling protrusion 132 may have a conical shape.

Preferably, the diameter of the lower end of the first engaging projection head 1321 is larger than the diameter of the cross section of the first engaging projection 132, and the diameter of the upper end of the first engaging projection head 1321 is smaller than the diameter Sectional diameter of the outer circumferential surface 132. [

The first coupling protrusion head 1321 penetrates through the edge portion of the plate 110 as shown in FIG.

6, the second coupling protrusions 133 may have a shape extending downward from a point where both side surfaces of the joint body 131 meet, And its cross section may be a rectangular shape.

The second engaging projection 133 is inserted and inserted into the end of the guide member 120 as described later.

Meanwhile, the joint 130 may further include at least one third coupling protrusion 134, which is preferably parallel to the second coupling protrusion 133.

The third engaging projection 134 preferably extends from both end surfaces of the joint body 131 formed with the second engaging projection 133 to both sides of the second engaging projection 133 as shown in Fig. And protrude by a predetermined length along the direction of the second coupling protrusion 133, respectively.

The third engaging protrusion 134 supports the guide member 120 from the inside or the outside as described later so as to prevent the guide member 120 from coming off and follow it when the heat exchanging element contracts or expands, ).

The joint 130 having such a structure is made of a synthetic resin, preferably a polymer-based resin material, and integrally molded.

7, the guide member 120 is L-shaped in cross section, has an L beam structure that is elongated in the longitudinal direction, and has a plurality of grooves extending longitudinally on the inner or outer surface thereof. .

Fig. 7 (a) shows the sectional structure of the guide member 120, and Fig. 7 (b) shows the guide member 120 from the side.

The guide member 120 is designed to be sealed at the boundary of the flow path so that the air and air are not mixed with the air-to-air heat exchanger when the air-to-air heat exchanger is installed in the equipment.

In particular, since the guide member 120 is in contact with the two air currents, the heat transfer performance should not be lowered to cause condensation. It is necessary to have sufficient rigidity so that the shape of the heat exchanger can be maintained while mounting and detaching the equipment while satisfying these conditions.

In order to satisfy such a requirement, a polymer extruded shape as shown in Fig. 7 (a) was designed.

7A, the first groove 121 is formed to be long in the longitudinal direction along the tangent line between the inner side and the two sides of the joint member 120. As shown in Fig.

The second engaging projection 133 of the joint 130 is inserted into the first groove 121, as shown in Fig. 7 (b).

On the other hand, the second groove 122 is formed on the outer surface of the guide member 120 in the longitudinal direction with the first groove 121 as a center.

The second groove 123 may preferably be formed by recessing both outer side ends of the guide member 120 inwardly to reduce the thickness, as shown in Fig. 7 (a).

Preferably, the second groove 123 is provided in parallel with the first groove 121 at a position spaced from the first groove 121 by a predetermined distance.

4, the second groove 122 is provided at a position corresponding to the third coupling projection 134 of the joint 130, and when the joint 130 is fastened, the third coupling projection 134 , And is supported by the third engaging projection 134. [

The third engaging protrusion 134 of the joint 130 can move the second groove 122 from the outside and move finely in one direction or the opposite direction along the longitudinal direction of the guide member 120.

In addition to the first groove 121 and the second groove 122, the guide member 120 may have one or more recesses (not shown) on the inner or outer surface of the guide member 120 to enhance the rigidity of the guide member 120 and lengthen the heat transfer path. Can be formed longer.

The guide member 120 may be deformed due to repeated shrinkage or expansion of the guide member 120 about the region where the plurality of grooves are formed. However, by forming the grooves in this manner, the thickness of the guide member 120 can be kept constant. The deformation of the guide member 120 can be reduced.

Furthermore, by forming a plurality of grooves on the outer side and the inner side of the guide member 120 for sealing the heat exchanger, the amount of heat transferred through the end surface of the guide member 120 can be reduced by increasing the thermal resistance.

The guide member 120 is made of a synthetic resin, preferably a polymer-based resin.

8 shows the structure of the plate 110. Fig.

The plate member 110 can be manufactured by bending a resin plate, preferably a polymer plate, of a synthetic resin.

Such a plate 110 may have a rectangular planar surface, as shown in Fig.

The edge of the plate member 110 has a shape recessed by a predetermined distance inward from a line segment connecting the outline and a joint fastening hole 111 into which the first fastening protrusion 132 of the joint 130 is inserted Respectively.

On the other hand, the plate member 100 can be variously deformed in order to reinforce rigidity and enhance airtightness.

Fig. 9 is a view for explaining a modification for reinforcing the rigidity of the plate material. Fig.

9 (a) shows a modified example in which the outer bending portion 112 is formed by bending a section of the plate 110 excluding the corner portions thereof in one direction.

According to the modification shown in Fig. 9 (a), the outer bent portion 112 is preferably bent in a direction orthogonal to the plate member 110. As shown in Fig.

By continuously forming the outline bending portion 112 in which the side face of the plate member 110 is bent downward as described above, sufficient rigidity can be ensured even if the plate member is thin.

On the other hand, FIG. 9 (b) shows a modified example in which a depression 113 is further formed on the upper surface of the plate 110.

As shown in Fig. 9 (b), sufficient indentation can similarly be secured by forming depressions 113 of various patterns on the upper surface of the plate member 110. Fig.

Figure 10 shows the airtight performance visually by means of a frame structure.

In FIG. 10 (a), red portions are located on the same plane.

10A, the upper surface of the joint 130 is arranged on the same plane as the upper surface of the plate 110, and the other surface is coplanar with the outer surface of the guide member .

The shape of the outermost portion of the frame structure 100 should be such that it can be sealed by a generally used sealing material or that the top planes of the frame structure 100 have the same height so that the mixture of the exhaust gas and the air supply flowing into the heat exchanger is not mixed, This is designed as described above.

That is, in the state where the joint 130 is fastened, the frame structure 100 according to the present invention has a uniform height with respect to the upper surface and the side surface, and the airtightness can be sufficiently secured.

On the other hand, the portion indicated by green in FIG. 10 (b) is a surface directly contacting the heat exchanging element, and forms a section continuous along the outermost portion. Accordingly, the leakage occurring on the contact surface between the plate member 110 and the heat exchanging element can be minimized.

The plate member 110 and the guide member 120 are fixed by fastening the plate member 110 and the guide member 120 by means of the joint 130. However, The heat exchange element frame may be realized by removing the structure and bonding the mutual contact portions instead.

Although the case where the plate member 110 and the guide member 120 are fastened by the joint 130 has been described in the above embodiment, the joint 130 may be removed and the guide member 120 may be fixed to the edge of the heat- Or may be realized by joining to the respective corner portions of the plate member 110. [

For example, the contact portion between the plate member 110 and the guide member 120 and the contact portion with the heat exchange element can be bonded, ultrasonic welded, or heat welded.

The technical idea of the present invention has been described through several embodiments.

It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described above from the description of the present invention. Further, although not explicitly shown or described, those skilled in the art can make various modifications including the technical idea of the present invention from the description of the present invention Which is still within the scope of the present invention. The above-described embodiments described with reference to the accompanying drawings are for the purpose of illustrating the present invention, and the scope of the present invention is not limited to these embodiments.

100: Frame structure
110: plate
111: Joint fasteners
112: outer bend
113: depression
120: Guide member
121: first groove
1211: coupling projection head coupling portion
123: 2nd groove
130: Joint
131: joint body
1311:
132: first engaging projection
1321: first engaging projection head
133: second engaging projection
134: third engaging projection

Claims (3)

A pair of plate members 110 made of a synthetic resin material and spaced apart from each other by a predetermined distance;
And a plurality of guide members 120 made of a synthetic resin material and provided in a direction orthogonal to the pair of plate members 110 and connecting corresponding parts of the pair of plate members 110,
The guide member 120 is elongated in the longitudinal direction. The guide member 120 has a first groove 121 that is recessed inward along the longitudinal direction,
Wherein the plurality of guide members (120) are joined to the side surfaces of the plate member (110) or the corner portions of the heat exchange elements, respectively. The method according to claim 1,
The frame structure of an air-to-air heat exchanger according to claim 1, wherein the plate member (110) has an outer bent portion (112) formed by bending the plate member (110) in a direction orthogonal to one direction along an outline except for each corner portion. The method according to claim 1,
Wherein the plate member (110) has a depression (113) recessed by a predetermined distance from the top surface in the bottom surface direction.

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