JP2002005583A - Heat-exchanging segments and heat-exchanging element for gas to gas stacking the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-exchanging element which is suitable for use in the case where the inflow resistance of one gas and the discharge resistance of the other gas are in unbalanced relation, concerning a heat-exchanging element where heat-exchanging segments equipped with flat and elliptic hollow resinous spacers are stacked. SOLUTION: A heat-exchanging element 1a is made into such structure that the same type of heat-exchanging segments are stacked, and one gas passage 3a is supplied with gas A (for example, outside air), and the other gas passage 4a is supplied with gas B (for example, inside air) so as to exchange heat. What is more, the heat-exchanging segment is equipped with flat elliptic first and second hollow resinous spacers 5a and 7a, and besides the dimension (dimension in direction Z) between the flat faces of the second hollow resinous spacer 7a is larger than the dimension between the flat faces of the first hollow resinous spacer 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange segment and a gas-to-gas heat exchange element in which the heat exchange segments are stacked.

[0002]

2. Description of the Related Art Conventionally, as is well known, air-conditioning ventilation fans used in houses and offices are equipped with a heat exchange element for outdoor air to indoor air. As an example of the heat exchange element described above, an element according to a prior application (for example, Japanese Patent Application No. 11-361479) can be mentioned.

That is, in FIG. 1, a heat exchange element 1 according to the prior application is configured by laminating the heat exchange segments 2 shown in FIG.
A first hollow resin spacer 5 between a plurality of oblate first hollow resin spacers 5 arranged at a predetermined interval;
The first hollow resin spacer 5 is formed so as to form the gas flow path 3 opened in one direction only in the entire length direction (X direction) of the first hollow resin.
The heat exchange sheets 6a and 6b are fixed to the first hollow resin spacer 5 and a plurality of flat elliptical second hollows are arranged so that both ends in the full length direction (Y direction) are arranged in a direction orthogonal to the full length direction of the first hollow resin spacer 5. A resin spacer 7 is fixed on the heat exchange sheet 6b at a predetermined interval.

Therefore, according to the heat exchange element 1, gas A can be supplied to one gas flow path 3 and gas B can be supplied to the other gas flow path 4 to perform heat exchange. Between the pressure loss ΔPx in the X direction, which is the flow direction of the gas A, and the pressure loss ΔPy in the Y direction, which is the flow direction of the gas B, for example, {Px ≦ Py, ie, the pressure loss difference}
P = △ Px- △ Py ≦ 0 occurs.

[0005] In such a case, irregularities causing various problems such as a decrease in heat transfer property and moisture transfer property are easily formed on the heat exchange sheets 6a and 6b. Therefore, the emboss 8 is formed on the heat exchange sheets 6a and 6b as a preventive means.

[0006]

However, the pressure loss difference △
Since P is generally based on a low value of 3 Pa or less, if it is higher, that is, for example, when the gas A is outdoor air and the gas B is room air, the air is blocked outside the room at atmospheric pressure. Since there is nothing in the free state, the inflow resistance of the outdoor air is small, while the indoor room has a large indoor air discharge resistance due to the size of the room, the gap with the adjacent room, the airtight state, the open / closed state of the door, etc. Accordingly, the pressure becomes positive in the X direction, and becomes negative in the Y direction.
In such a case, in the heat exchange element 1 described above, the first and second hollow resin spacers 5 provided in the heat exchange segment 2 are used.
7 have the same size, that is, the R-to-R dimension La and the flat-to-flat dimension Lb shown in FIG. , Etc.), and there were cases where it was difficult to deal with them, and the versatility was insufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and has as its object to provide a heat exchange element comprising heat exchange segments each having a flat elliptical hollow resin spacer. A heat exchange element suitable for use when the inflow resistance of one gas (for example, gas A) and the discharge resistance of the other gas (for example, gas B) are unbalanced, and heat exchange therefor Trying to provide a segment.

[0008]

In order to achieve the above object, in a heat exchange segment according to the present invention, a plurality of flat elliptical first and second elliptical ellipses are arranged at predetermined intervals. A heat exchange sheet is fixed to the first hollow resin spacer so that a gas flow path opened in one direction only in the entire length direction of the first hollow resin spacer is formed between the hollow resin spacers. Heat exchange wherein a plurality of flat elliptical second hollow resin spacers are fixed at predetermined intervals on the heat exchange sheet so that both ends of the first hollow resin spacer in the direction intersecting the full length direction are arranged. In the segment, the dimension between the flat surfaces of the first hollow resin spacer is different from the dimension between the flat surfaces of the second hollow resin spacer. Further, in the heat exchange element according to the present invention, as described in claim 3, such heat exchange segments are laminated.

[0009]

In FIG. 2, a heat exchange segment 2a has a lower heat exchange sheet 6a and an upper heat exchange sheet 6b fixed to three first hollow resin spacers 5a and an upper heat exchange sheet 6b. Three second hollow resin spacers 7a are fixed on the heat exchange sheet 6b.

[0010] The first hollow resin spacer 5a includes:
The second hollow resin spacers 7a are arranged at equal intervals, and the second hollow resin spacers 7a are also arranged at equal intervals, and the arrangement pitch of the first and second hollow resin spacers 5a, 7a is the same. In addition, the first hollow resin spacer 5a and the heat exchange sheets 6a and 6b, and the heat exchange sheet 6b and the second hollow resin spacer 7a are fixed with an appropriate adhesive.

Therefore, as shown in the figure, the gas passage 3a is formed in one direction only in the entire length direction (X direction) of the first hollow resin spacer 5a, but the second hollow resin spacer 7a is The first hollow resin spacer 5a is provided so that both ends in the full length direction are arranged in a direction (Y direction) orthogonal to the full length direction (X direction). The first and second hollow resin spacers 5a and 7a are both provided in a flat elliptical shape, as shown in FIG. In the drawing, La indicates the dimension between the R planes, and Lb indicates the dimension between the flat planes.
Lb is provided in 2 to 5.

The first hollow resin spacer 5a has an L
a is provided equal to that of the second hollow resin spacer 7a (La).
Lb of the first hollow resin spacer 5a (Lb)
It is 1.2 times to 1.3 times larger than b).

The flat and elliptical first and second hollow resin spacers 5a and 7a can be obtained by extruding or deforming a commercially available circular straw made of PP or a straw made of PET.

As an example of the second hollow resin spacer 7a, the dimension La between the R faces is 5.0 mm, and the dimension L between the flat faces is L.
b is 2.0mm, wall thickness is 0.1mm, total length is 171mm
And as an example of the first hollow resin spacer 5a, the dimension La between R faces is 5.0 mm, the dimension Lb between flat faces is 1.6 mm, the thickness is 0.1 mm, and the total length is 171.
mm.

As described above, the heat exchange segment 2a according to the present invention is provided with the first and second hollow resin spacers 5a and 7a having a flat elliptical shape. For this reason, for example, the heat exchange sheets 6a and 6b made of a paper material provided with heat transfer, moisture permeability, flame retardancy, etc., such as calcium chloride impregnated paper, are used as the first heat exchange sheets.
In the case of bonding to the hollow resin spacer 5a, the bonding area between them can be increased, and sufficient bonding strength can be obtained. That is, since the heat exchange sheets 6a and 6b can be adhered to the flat surface of the first hollow resin spacer 5a, they can be firmly adhered.

In addition, since the number of the first and second hollow resin spacers 5a and 7a required for producing one heat exchange segment can be reduced based on this, FIG. As shown, when a plurality of heat exchange segments 2 are stacked, relatively large gas flow paths 3a and 4a can be formed, and low pressure loss can be achieved.

The first and second hollow resin spacers 5a and 7a cannot be rolled, so that they are easy to handle during the production of the heat exchange segment and have a flat elliptical shape. Therefore, it is possible to stabilize the maintenance of the shape of the heat exchange element 1a formed by laminating the heat exchange segments 2a, and thus to obtain the heat exchange element 1a which is hardly deformed and has excellent shape stability. be able to.

The first and second hollow resin spacers 5
Since the gas tightness at both ends of the a and 7a can be improved and gas leakage can be prevented, gas mixing between the one gas passage 3a and the other gas passage 4a can be completely prevented.

The flat and elliptical first and second hollow resin spacers 5a and 7a are arranged in the width direction (La direction in FIG. 3).
Since it has a large bending resistance, it has characteristics like a rigid spacer, and has a flat face-to-face dimension (L in FIG. 3).
b dimension) is smaller, so more heat exchange segments 2
a can be laminated to form the heat exchange element 1a, and the first hollow resin spacer 5a and the second hollow resin spacer 7a are provided in such a relationship as to be orthogonal to each other, and therefore have appropriate rigidity. The heat exchange segment 2a that is hardly deformed can be obtained.

The lower heat exchange sheet 6a has embosses 8 formed in a predetermined pattern, and the upper heat exchange sheet 6b has embosses 8 formed in a predetermined pattern.

As a result, the rigidity of the heat exchange sheets 6a and 6b is further enhanced and the heat exchange sheets 6a and 6b are hardly deformed.
When heat is exchanged by supplying gas to the heat exchanger, the occurrence of a situation in which the lower heat exchange sheet 6a and the upper heat exchange sheet 6b are deformed and brought into contact with each other is almost completely prevented. can do.

Further, the surface area of the heat exchange sheets 6a and 6b brought into contact with the gas to be exchanged with heat can be increased, and the gas can be branched or meandered in the gas flow paths 3a and 4a to flow. Therefore, the heat transfer property and the moisture transfer property can be improved as a synergistic effect. When laminating the heat exchange segments 2a, the heat exchange segments 2a are fixed to each other by using an appropriate adhesive. However, the stacking may be performed by another method, for example, using an appropriate holding jig or the like.

Thus, the heat exchange element 1a having a laminated structure can be easily obtained as shown in a perspective view in FIG. 1, but at this time, no emboss is formed in the uppermost heat exchange segment 2a. The heat exchange sheet 6c is bonded. Such a heat exchange element 1a forms a gas passage 3a having a smaller opening area and a gas passage 4a having a larger opening area.

That is, the gas flow path 4a and the gas flow path 3a have the same horizontal dimension, but as shown in FIG. 4, the dimension in the height direction (Z direction) of the gas flow path 4a. Ga is a dimension Gb in the height direction (Z direction) of the gas flow path 3a.
Greater than. Therefore, one gas (for example, gas A)
In the case where the inflow resistance of the other gas and the discharge resistance of the other gas (for example, the gas B) are in an unbalanced relationship, heat exchange can be performed well.

More specifically, as shown in FIG. 5, gas A (outdoor air) flows into the room from the outside partitioned by the wall 10 and gas B (room air) flows from the room to the outside. In the case of heat exchange when discharging, the outside air at atmospheric pressure has no obstruction and is in a free state, so the inflow resistance of outdoor air is small, whereas the size of the room, the gap between adjacent rooms, and airtightness Although the discharge resistance of the indoor air is large depending on the state, the open / closed state of the door, etc., the opening area of the gas flow path 4a of the heat exchange element 1a through which the gas B (the indoor air) flows is the gas flow path through which the gas A (the outdoor air) flows. 4b, the pressure loss difference ΔP is set to 3 Pa
Heat exchange can be performed while maintaining the following.

The air-conditioning ventilation fan device shown in FIG. 1 is constructed by mounting an exhaust fan 11, an intake fan 12, a filter 13 and a heat exchange element 1a in a casing 14, and the heat exchange element 1a , Casing 14
It is exchangeably mounted by a support 15 mounted on the support.

At this time, the gas passages 4a, 3a are compressed in the Z direction by predetermined means (not shown), and the height dimensions Ga, Gb of the gas flow passages 4a, 3a are adjusted to a predetermined value. Therefore, Ga, G
Although b becomes smaller than Lb, such adjustment can be performed because the first and second hollow resin spacers 5a and 7a have elasticity.

The distance Lb between the flat surfaces of the first hollow resin spacer 5a and the second hollow resin spacer 7a
Of the gas passages 4a, 3a in the height direction Ga, Gb are the same (Ga) even if the heat exchange element 1a is compressed in the Z direction.
= Gb) and the dimensional difference between the two is kept constant.

In the above description, the relationship of Ga> Gb is provided. However, if necessary, the relationship of Ga <Gb, that is, the first space distance Lb of the second hollow resin spacer 7a may be smaller than the first distance Lb. The flat-to-flat dimension Lb of the hollow resin spacer 5a may be made larger. With such provision, heat exchange can be performed well when the inflow resistance of one gas and the discharge resistance of the other gas are unbalanced.

The first and second hollow resin spacers 5a and 7a having a flat elliptical shape are not R-dimensional distances La, but are not equal to each other.
The difference between the flat face dimensions Lb is formed because the difference between the R face dimensions La is formed so that the difference between the flat face dimensions Lb and the width of the adhesive for fixing the heat exchange sheets 6a and 6b is reduced. This is because a difference is formed, and the sheet sticking becomes unbalanced, causing deterioration in heat transfer and moisture permeability.

In the present invention, the number of the first and second hollow resin spacers 5a and 7a is two or more, that is, a predetermined number can be selected as needed.

Further, the second hollow resin spacer 7a is
In addition to being provided so as to be arranged in a direction (Y direction) orthogonal to the entire length direction (X direction) of the first hollow resin spacer 5a, for example, as in the case of a rhombic heat exchange segment,
They may be provided so as to be arranged in a non-orthogonal direction. In short, the first heat exchange segments correspond to the planar shape of the heat exchange segments.
What is necessary is just to provide so that it may be arrange | positioned in the direction which intersects with the full length direction of the hollow resin spacer 5a.

The heat exchange segment 2a may have any shape such as a square, a rectangle, a rhombus or the like in plan view, and the heat exchange sheets 6a and 6b may be other than the calcium chloride impregnated paper. The dimensions of each part of the flat ellipse may also be appropriately set to predetermined dimensions.

Although it is preferable to provide the embossing 8, it can be omitted when it is not necessary, and its vertical cross-section may be any shape such as a circle or a truncated cone. , Its planar shape is also point-like,
Any shape such as a linear shape, an intermittent linear shape, and a cross shape may be used. The pattern to be formed may be any pattern.

[0035]

As described above, according to the present invention, there is provided a heat exchange element in which heat exchange segments each having a flat elliptical hollow resin spacer are laminated, and the inflow resistance of one gas and the other gas It is possible to obtain a heat exchange element suitable for use in a case where the discharge resistance is unbalanced. Further, a heat exchange segment suitable for forming the heat exchange element by laminating a plurality of the heat exchange elements can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat exchange element.

FIG. 2 is a perspective view of a heat exchange segment.

FIG. 3 is a cross-sectional view of first and second hollow resin spacers.

FIG. 4 is a view showing a stacked state of first and second hollow resin spacers.

FIG. 5 is a plan view of the air-conditioning ventilation fan device.

[Description of Signs] 1, 1a: heat exchange element 2, 2a: heat exchange segment 3, 3a: gas flow path 4, 4a: gas flow path 5, 5a: first hollow resin spacer 6a, 6b: heat exchange sheet 7, 7a: Second hollow resin spacer 8: Emboss

Claims (3)

[Claims] 1. A gas flow path which is opened in one direction only in the entire length direction of the first hollow resin spacer is formed between a plurality of oblong first hollow resin spacers arranged at predetermined intervals. The heat exchange sheet is fixed to the first hollow resin spacer as described above, and a plurality of flat elliptical second ends are arranged such that both ends in the full length direction are arranged in a direction intersecting the full length direction of the first hollow resin spacer. In a heat exchange segment in which hollow resin spacers are fixed at predetermined intervals on the heat exchange sheet, the dimension between the flat faces of the first hollow resin spacer and the dimension between the flat faces of the second hollow resin spacer are different. A heat exchange segment, wherein the heat exchange segment is provided. 2. The heat exchange segment according to claim 1, wherein an emboss pattern is formed on the heat exchange sheet. 3. A gas-to-gas heat exchange element wherein the heat exchange segments according to claim 1 or 2 are laminated.