JPH09184693A - Heat exchanging element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable some heat exchanging elements to be assembled and constructed in a relative easy manner, increase a sealing performance and enable a mixing of air to be positively prevented. SOLUTION: Both side edges opposing against each other at one surface of a rectangular flat-plate like heat exchanging plate 12 are provided with end plates 15 and the other surface of it is provided with each of a plurality of ribs 13 crossing at right angles with the end plates 15, respectively, and at the same time some heat exchanging elements 11 having seal ribs 14 engaged with the end plates 15 are integrally molded by resin. The heat exchanging elements 11 are overlapped in an up-and-down relation while the end plates 15 and the sealing ribs 14 are being engaged from each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reduces the load on an air conditioner to obtain an energy saving effect by performing ventilation while exchanging heat between the supply of outside air and the exhaust of indoor air. The present invention relates to a heat exchange element used in an exchange unit.

[0002]

2. Description of the Related Art FIG. 15 is a perspective view showing a conventional general heat exchange element for performing heat exchange without mixing the outside air with the indoor air, and FIG. 16 is a partially enlarged front view thereof. FIG. 17 is a sectional view taken along the line DD of FIG.

As shown in FIG. 1, a conventional general heat exchange element 1 has, for example, flame-retardant paper on the surface of a rectangular flat plate heat exchange plate 2 having a moisture permeability for the purpose of total heat exchange. Corrugated corrugated fins 3 made of plastic or the like are bonded together to form a corrugated cardboard-shaped heat exchange element 5 having a plurality of channels 4 each having a triangular cross section. Then, the heat exchange elements 5 are laminated in multiple layers while being offset from each other by 90 degrees while sealing the corners at the four corners and arranging metal shape supporting columns 6 which are fitted to the rails when the unit is assembled. It was composed of

This type of heat exchange element 1 is formed into a predetermined shape by cutting, for example, a plurality of heat exchange elements 5 which are laminated in a plurality of layers, and in order to prevent air mixing,
It was necessary to firmly bond the heat exchange plate 2 and the corrugated fins 3 together.

Then, the heat exchange element 1 is incorporated in the heat exchange unit, the air flowing into the heat exchange unit from one flow path is supplied to the indoor side, and the air flowing into the heat exchange unit from the other flow path. When discharging the
The air flowing into the indoor side and the air flowing out to the outdoor are further placed in the multi-layer flow passages 4 inside the heat exchange element 1, that is, flow alternately in a plow shape, and heat exchange is performed here. ing.

Here, for example, as disclosed in JP-A-5-79784, a plurality of ribs provided on the surface of the heat exchange plate and a plurality of ribs provided on the back surface of the heat exchange plate orthogonal to the ribs are provided. A heat exchange element is formed by sandwiching it with resin to form a heat exchange element, and by constructing the heat exchange element by alternately stacking this heat exchange element and partition plates, it is possible to reduce ventilation resistance loss and manufacturing cost. A plan is proposed.

[0007]

However, in the former case shown in FIGS. 15 to 17 of the above-mentioned conventional example, not only a pillar or a screw for holding the shape is necessary, but also a cutout into a predetermined shape is required. Since it is necessary to firmly bond the corrugated fins to the heat exchange plate, this not only leads to an increase in the number of parts and the number of manufacturing steps, but also tends to cause variations in product quality.

Moreover, not only is the flow passage cross-sectional area of the large number of triangular flow passages formed by the corrugated fins small and the pressure loss large, but the corrugated fins having poor heat exchange efficiency and the heat exchange plate have a large number of bonded portions. Therefore, the heat exchange plate cannot be effectively used. Further, since the inner wall of the flow passage is smooth, there is a problem that the temperature boundary layer is easily developed and the heat exchange efficiency is reduced.

Further, in the latter (the invention described in Japanese Patent Laid-Open No. 5-79784), it is necessary to firmly bond the heat exchange element and the partition plate in order to enhance the sealing effect, as in the former case. It is considered that this not only leads to an increase in the number of parts and manufacturing man-hours, but also cannot prevent a decrease in heat exchange efficiency due to the development of the temperature boundary layer.

The present invention has been made in view of the above circumstances, and is a heat exchange element that can be relatively easily assembled and configured, has high sealing performance, and reliably prevents air mixing, and a positive element. Another object of the present invention is to provide a heat exchange element in which the temperature boundary layer is destroyed and the heat exchange efficiency is improved.

[0011]

In a heat exchange element according to the present invention, end plates are provided on both side edges of one surface of a rectangular flat plate heat exchange plate that face each other, and the other surface is orthogonal to the end plate. A plurality of ribs are provided respectively, and a heat exchanging element, which is provided with sealing ribs on the same plane as the ribs and on both side edges parallel to the ribs, which engages with the end plates, is integrally molded with a resin, It is characterized in that the end plate and the sealing rib are vertically overlapped with each other while being engaged with each other. Further, the end plate is formed so as to be located outside when the end plate and the sealing rib are engaged with each other, and the outer surface of the end plate is formed in an arc shape.

Another heat exchange element according to the present invention is a heat exchange element in which a plurality of ribs are provided on at least one surface of a rectangular flat plate-shaped heat exchange plate, and a protruding piece protruding laterally on the side surface of the rib. Is provided, and the heat exchange elements are vertically stacked while being shifted by 90 degrees.

Still another heat exchange element according to the present invention is a heat exchange element in which a plurality of ribs are provided on at least one surface of a rectangular flat plate-shaped heat exchange plate, and the inside of at least one surface of the heat exchange plate. The unevenness is provided on the
It is characterized in that it is constructed by stacking vertically while staggering.

Further, in the heat exchange element, both ends of the rib are formed in a pointed shape.

[0015]

According to the present invention as set forth in claim 1, which is configured as described above, a plurality of one type of heat exchange elements integrally molded of resin are prepared, and the ends of the heat exchange elements located above and below are prepared. By sequentially stacking the plates and the sealing ribs while engaging them with each other, it is possible to form a heat exchange element having flow paths in the directions orthogonal to each other every other layer, and further, to form the end plates and the sealing ribs. By the engagement, it is possible to secure a sufficient sealing property here without using an adhesive or the like.

Further, by arranging the end plate outside the sealing rib and forming the outer surface of the end plate in an arc shape, it is possible to reduce the pressure loss due to this surface.

According to the third aspect of the present invention, when the fluid flows in the flow passage defined by the ribs adjacent to each other and the heat exchange plates of the upper and lower heat exchange elements, the ribs of the fluid are provided. It is possible to improve the heat exchange efficiency by positively disturbing the flow along the side surface by the projecting piece projecting to the side of the side surface.

Further, according to the present invention as set forth in claim 4, when the fluid flows in the flow passage defined by the ribs adjacent to each other and the heat exchange plates of the heat exchange elements located above and below, the heat of the fluid is reduced. The flow along the upper surface or the lower surface of the exchange plate can be positively disturbed by the unevenness provided inside at least one surface of the heat exchange plate to improve the heat exchange efficiency.

Further, by forming the both ends of the rib into a smooth pointed shape, it is possible to reduce the pressure loss due to the end of the rib.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an embodiment of a heat exchange element of the present invention, FIG. 2 is a perspective view of the same after assembly, FIG. 3 is a partially enlarged front view of FIG. 2, and FIG.
The sectional view on the AA line of FIG. 3 is shown, respectively.

As shown in the figure, in the heat exchange element 10 of this embodiment, heat exchange elements 11 formed by integral molding of resin such as molding are sequentially laminated in the vertical direction while being shifted by 90 degrees. It is composed by.

The heat exchange element 11 is provided with a heat exchange plate 12 formed in the shape of a rectangular flat plate, and one surface of the heat exchange plate 12, that is, the back surface in the figure, projects downward. A plurality of ribs 13 are provided at equal pitches in parallel with one side, and further, a rib 14 for sealing is provided in parallel with each rib 13 on the side edge of the heat exchange plate 12 on the back surface side.

These ribs 13 and sealing ribs 14
Has a constant height of 2 mm, for example, and extends linearly over substantially the entire length of one side of the heat exchange plate 12.

On the other surface of the heat exchange plate 12, that is, on the side edge of the front surface in the figure, which is orthogonal to the ribs 13, an end extending at the same height as the ribs 13 and extending along the entire length in the longitudinal direction thereof. A plate 15 is provided. On the back surface side of the end plate 15, there is provided an engaging concave portion 15b located between the corner block portions 15a provided at the corners of the heat exchange plate 12 and having the same length as the length of the sealing rib 14. Has been.

Furthermore, a notch 14a is provided in the lower portion of the sealing rib 14 on the front surface side, and the cross-sectional shape of the engaging recess 15b is the same as the sealing rib 14 described above.
Is formed so as to match the cross-sectional shape of the.

As a result, when the heat exchange elements 11 are vertically stacked while being shifted by 90 degrees, the sealing ribs 14 of the heat exchange element 11 located above the inside of the engaging recess 15b of the heat exchange element 11 located below. Are fitted and are in close contact with each other over the entire length in the height direction, so that sufficient sealing performance here is ensured.

As described above, a plurality of one type of heat exchange elements 11 integrally molded of resin are prepared, and the end plates 15 and the sealing ribs 14 of the heat exchange elements 11 located above and below are engaged with each other in sequence. By stacking the layers, the heat exchange element 10 having the flow paths 16 in the directions orthogonal to each other is formed every other layer. At this time, the end plate 15 and the sealing rib 1 are formed.
By engaging with 4, it is possible to secure the sealing property here and simplify the assembly.

Further, a cylindrical projection 15c is formed on the upper surface of the corner block portion 15a, and a concave portion (not shown) into which the projection 15c is fitted is formed on the lower surface of the corner block portion 15a corresponding to the projection 15c. The heat exchange elements 11 are respectively provided to position each other and ensure airtightness at the corners.

Here, each of the flow passages 16 has a pair of ribs 13 adjacent to each other and a heat exchange plate 12 of the heat exchange element 11 positioned above and below, so that the inlet and the outlet of each flow passage 16 are adjacent to each other. 13 and the end plates 15 of the heat exchange element 11 located above and below, are partitioned and formed.
In this embodiment, the following configuration is provided.

That is, as shown in FIG. 4, the surface of the end plate 15 located on the inflow side (inlet) of the flow path 16 is a slightly curved arc-shaped surface 15d of a cubic function, and the outflow side. The surface of the end plate 15 located at the (outlet) is a slightly tapered arc-shaped surface 15e of a cubic function. Furthermore, as shown in FIG. 5, the end of the rib 13 located on the inflow side of the flow path 16 is a smooth and slightly pointed pointed part 13a, and the end of the rib 13 located on the outflow side. The portion is a smooth and slightly tapered pointed portion 13b. Pointed part 13
The shapes of a and 13b are cubic functions that minimize pressure loss.

By configuring in this way, each flow path 1
The inlet and the outlet of 6 are formed in a groove shape in the vertical and horizontal directions to reduce the pressure loss here and allow the air to smoothly flow into each flow passage 16 and to generate heat when passing through this flow passage 16. After the replacement, it can be drained smoothly.

Further, on both side surfaces of the rib 13 along the length direction, at positions opposite to each other, for example, 2-4.
A plurality of arrow-shaped protruding pieces 17 protruding outward by about 1 mm are integrally provided with the rib 13 at a predetermined pitch of 0 mm. Furthermore, inside the heat exchange plate 11,
As shown in FIGS. 6 and 7, at the staggered position of the heat exchange plate 11 itself, for example, at a predetermined pitch of 2-40 mm,
For example, a circular convex protrusion 18 protruding upward by about 0.1 to 1.5 mm is provided. The convex protrusions 18 can be formed by pressing the heat exchange plate 11 while using, for example, a die having protrusions, but it is provided when the heat exchange element 11 is integrally molded. You can also

By configuring in this way, each flow path 1
The flow of the fluid in 6 is positively disturbed by the projecting piece 17 in the left-right direction and by the convex projection 18 in the vertical direction to generate a turbulent flow, as shown in FIG. The heat exchange efficiency here can be increased.

As shown in FIG. 9, by providing projecting pieces 17 in a zigzag pattern on both side surfaces of the rib 13 at a predetermined pitch, it is possible to suppress the occurrence of turbulence and to reduce the pressure. The loss can be reduced. The protruding piece 1
It is needless to say that, for example, a semicircle, a triangle, a quadrangle, a cylinder, a cone, a triangular prism, a triangular pyramid, a quadrangular prism, a quadrangular pyramid, a wing shape, or the like can be used as 7.

Further, as shown in FIG. 10, the convex projections 18 are provided at the grid-like positions, or as shown in FIGS. 11 and 12, the convex projections 18 and the concave projections 19 are alternately arranged in each row. By arranging them, as shown in FIG. 13, turbulent flow can be positively generated on both upper and lower sides of the flow path 16.
Further, as shown in FIG. 14 (a), a resin 20 such as hot melt is dropped at a predetermined position on the upper surface of the heat exchange plate 11 to form a convex projection 18, or as shown in FIG. 14 (b). In a predetermined position on the upper surface of the heat exchange plate 11,
Can be adhered to form the convex protrusion 18.
In addition, the protrusions having an arbitrary shape may be formed in an arbitrary array by an arbitrary method.

As described above, the pressure loss of the heat exchange element is changed by arbitrarily changing the height, arrangement, combination, and shape of the projections provided on the sides of the ribs and ribs provided on the heat exchange plate. The heat exchange efficiency can be changed arbitrarily.

[0037]

As described above, according to the present invention,
A plurality of one type of heat exchange element integrally molded with resin was prepared, and the end plates of the heat exchange elements located above and below and the sealing ribs were sequentially laminated while engaging with each other to prevent air mixing. The heat exchange element having a sufficient sealing performance can be configured, which can simplify the assembling work and enhance the work efficiency. Here, the end plate is located outside the sealing rib, and the outer surface of the end plate is formed in an arc shape such as a cubic function, so that the pressure loss due to this surface can be reduced.

Further, by providing a protruding piece protruding laterally on the side surface of the rib or providing unevenness inside at least one surface of the heat exchange plate, the protruding piece or unevenness positively influences the flow of the flow path. The heat exchange efficiency can be improved. By forming both ends of the rib into a pointed shape such as a smooth cubic function, the pressure loss due to the end surface of the rib can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is likewise a perspective view after assembly.

FIG. 3 is a front view showing a part of FIG. 2 in an enlarged manner.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

5 is an enlarged perspective view showing a rib included in the embodiment shown in FIG. 1. FIG.

FIG. 6 is a plan view of the heat exchange plate.

FIG. 7 is a sectional view taken along line BB of FIG. 6;

FIG. 8 is a sectional view for explaining the operation of the heat exchange plate shown in FIGS. 6 and 7.

FIG. 9 is a perspective view showing a modified example of the rib.

FIG. 10 is a plan view showing a modified example of the heat exchange plate.

FIG. 11 is a plan view showing another modification of the heat exchange plate.

12 is a sectional view taken along line CC of FIG.

FIG. 13 is a sectional view for explaining the operation of the heat exchange plate shown in FIGS. 11 and 12.

FIG. 14 is a sectional view showing still another modification of the heat exchange plate.

FIG. 15 is a perspective view showing a conventional example.

FIG. 16 is a front view showing a part of the same in an enlarged manner.

17 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat exchange element 11 Heat exchange element 12 Heat exchange plate 13 Rib 14 Sealing rib 15 End plate 15b Engaging recess 16 Flow path 17 Projecting piece 18 Convex projection

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Taku Kawanishi 4-2-1 Honfujisawa, Fujisawa City, Kanagawa Prefecture EBARA Research Institute

Claims (5)

[Claims] 1. A rectangular flat plate-shaped heat exchange plate is provided with end plates on opposite side edges of one surface and a plurality of ribs orthogonal to the end plate on the other surface, and is flush with the ribs. A heat exchange element having sealing ribs engaging with the end plate on both side edges parallel to the rib is integrally molded with resin, and the heat exchange element is engaged with the end plate and the sealing rib with each other. A heat exchange element, which is characterized by being vertically stacked. 2. The end plate is formed so as to be located outside when the end plate and the sealing rib are engaged with each other, and the outer surface of the end plate is formed in an arc shape. The heat exchange element according to claim 1. 3. A heat exchange element in which a plurality of ribs are provided on at least one surface of a rectangular flat plate-shaped heat exchange plate, and a protruding piece that laterally protrudes is provided on a side surface of the rib, and the heat exchange element comprises 9
A heat exchange element characterized by being vertically stacked while being shifted by 0 degree. 4. A heat exchange element in which a plurality of ribs are provided on at least one surface of a rectangular flat plate-shaped heat exchange plate, wherein unevenness is provided inside at least one surface of the heat exchange plate. A heat exchange element, which is constructed by vertically stacking them while shifting them by 90 degrees. 5. The heat exchange element according to claim 1, wherein both ends of the rib are formed in a smooth pointed shape.