WO2001018474A1 - Air-to-air heat-exchange element - Google Patents

Abstract

An air-to-air heat-exchange element (5) formed in such a structure that the same type of heat exchanging segments are stacked and heat exchanging gas is fed to one gas flow passages (4a) and the other gas flow passages (4b) formed in a direction perpendicular to the gas flow passages (4a), wherein the heat exchanging segments form the gas flow passages (4a) by sticking a heat exchange sheet on the upper and lower surfaces of flat elliptic first hollow resin spacers (2a) disposed at equal intervals and also sticking flat elliptic second hollow resin spacers (2b) on the upper surface side heat exchange sheet at equal intervals.

Description

 Specification

Technical field of gas-to-gas heat exchange element

 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. Background art

 Conventionally, as is widely known, an air-to-air heat exchanger is installed in an air-conditioning ventilation fan device used in a house or an office.

 For this reason, various types of heat exchange elements for it are already known. For example, as a representative example, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-110988 and Japanese Patent Application Laid-Open No. 5-288488, A plurality of heat exchange segments, each having a hollow resin spacer attached to one surface of a heat exchange sheet at a predetermined interval, are alternately shifted by 90 degrees in the entire length direction of the hollow resin spacer. One example is a stacked heat exchange element.

However, in this known heat exchange element, the hollow resin spacer of the heat exchange segment is formed of a commercially available circular straw made of polypropylene (hereinafter simply referred to as PP). Therefore, it is troublesome to handle the heat exchange segment at the time of production, etc., and the bonding area is insufficient when bonding the hollow resin spacer to the heat exchange sheet. It is difficult to secure enough strength and therefore, to increase the strength of the segment, more hollow resin spacers must be attached, which increases the material cost and used Heat exchange element There was a drawback when the amount of waste was increased when discarding waste.

 It is also known that the hollow resin spacer is provided in a shape other than a circle, for example, a square such as a square or a triangle, or an ellipse. However, such square hollow resin spacers are custom-made specifications and are expensive. An elliptical hollow resin spacer can be obtained by subjecting a commercially available circular straw such as pp to a predetermined deformation process, but suffers from the above-mentioned drawback of insufficient bonding area.

 Two

Could not be resolved. Three

 Four

 The present invention has been made in view of such circumstances, and by using a flat elliptical hollow resin spacer, the heat exchange segment can be easily handled at the time of production and the like. , It into a heat exchange sheet

 9

When bonding, it is possible to increase the bonding area

 11

The purpose is to provide a heat exchange element that can obtain adhesive strength.

 Fifteen

 16

DISCLOSURE OF THE INVENTION ₁₇

 The present invention employs the following configuration in order to achieve such an object. That is, the present invention is a gas-to-gas heat exchange element comprising a plurality of hollow resin spacers laminated on one side of a heat exchange sheet at predetermined intervals to form a heat exchange segment. The spacer is flat elliptical, and the flat portion (flat portion) is disposed so as to be in contact with the heat exchange sheet.

According to the gas-to-gas heat exchange element of the present invention, since the hollow resin spacer has a flat elliptical shape, it cannot roll, and it is difficult to produce the heat exchange element. Handling becomes easier. In addition, the bonding area between the hollow resin spacer and the heat exchange sheet can be increased, and sufficient bonding strength can be obtained. Based on this, the number of fixed hollow resin spacers can be reduced. In addition, a flat elliptical hollow resin spacer can be obtained by deforming a commercially available straw.

 Further, in the gas-to-gas heat exchange element of the present invention, a gas flow path is formed between the first hollow resin spacers so as to open in one direction only in the full length direction of the first hollow resin spacer. A plurality of the first hollow resin spacers are fixed to the heat exchange sheet at predetermined intervals so that the plurality of second hollow resin spacers extend in a direction intersecting the full length direction of the first hollow resin spacer. By fixing the spacer at predetermined intervals on the heat exchange sheet, the following functions and effects can be obtained. That is, a gas flow path formed between the first hollow resin spacers and a gas flow path formed between the second hollow resin spacers intersecting in the entire length direction of the first hollow resin spacer. The gas can be supplied to each of them to perform heat exchange.

 Further, by providing the flat surface dimension of the flat ellipse of the first hollow resin spacer and the flat surface dimension of the flat ellipse of the second hollow resin spacer to different dimensions, Good heat exchange can be achieved when the inflow resistance of the gas and the discharge resistance of the other gas are unbalanced.

Further, in the gas-to-gas heat exchange element of the present invention, by forming the embossed pattern on the heat exchange sheet, the rigidity of the heat exchange sheet is further strengthened and the heat exchange sheet is hardly deformed. When heat is exchanged by supplying gas to the gas passages formed between the heat exchange sheets, it is possible to prevent the lower heat exchange sheet and the heat exchange sheet from coming into contact with each other. In addition to increasing the surface area of the heat exchange sheet, Since the gas can flow in a branched or meandering manner, the flow path can be lengthened, and as a result, the heat transfer property and the moisture transfer property can be improved.

 Preferably, one end of the heat exchange sheet is fixed to only the flat portion of the hollow resin spacer, or is fixed to the flat portion and the curved portion (r portion) of the hollow resin spacer. I have. The former is more advantageous in terms of reducing the amount of heat exchange sheets used, and the latter is more advantageous in terms of fixing strength and heat exchange performance. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a perspective view of a heat exchange segment according to a first embodiment, and FIG. 2 is a cross-sectional view of a hollow resin spacer.

 FIG. 3 is a perspective view of the heat exchange element according to the first embodiment, FIG. 4 is a cross-sectional view of the air-conditioning ventilation fan device,

 FIG. 5 is a view showing a manner of fixing the heat exchange sheet to the flat elliptical first hollow resin spacer.

 FIG. 6 is a view showing another manner of fixing the heat exchange sheet to the flat oval-shaped first hollow resin-made shazer,

 FIG. 7 is a perspective view of a heat exchange segment according to the second and third embodiments,

 FIG. 8 is a perspective view of the heat exchange element according to the second and third embodiments, and FIG. 9 is a plan view showing an emboss pattern provided on the upper heat exchange sheet.

 FIG. 10 is a plan view showing an emboss pattern provided on the lower heat exchange sheet,

Fig. 11 shows the height of the emboss provided on the lower heat exchange sheet. FIG.

 FIG. 12 is a diagram showing a gas flow state,

 FIG. 13 is a plan view showing another emboss pattern provided on the lower heat exchange sheet,

 FIG. 14 is a plan view showing another emboss pattern provided on the lower heat exchange sheet,

 FIG. 15 is a view showing a state of contact between the embosses,

 FIG. 16 is a diagram showing a state of a gas flow in a portion where no emboss is provided,

 FIG. 17 is a diagram showing a state of a gas flow at a location where an emboss is provided;

 FIG. 18 is a view showing a stacked configuration of the first and second hollow resin spacers according to the third embodiment.

 FIG. 19 is a plan view of the air-conditioning ventilation fan device according to the third embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

 First embodiment

In FIG. 1, a heat exchange segment 1 has a lower heat exchange sheet 3 a and an upper heat exchange sheet 3 b fixed to three first hollow resin spacers 2 a, the upper side of the heat exchange sheet 3 on b, is configured by fixing the second hollow resin spacers _{2 b} of the three.

The first hollow resin spacers 2a are arranged at equal intervals, the second hollow resin spacers 2b are also arranged at equal intervals, and the first hollow resin spacers 2a and the first hollow resin spacers 2a are arranged at equal intervals. The exchange sheets 3a and 3b, the heat exchange sheet 3b, and the second hollow resin spacer 2b are fixed with an appropriate adhesive. Therefore, as shown in the figure, a gas flow path 4a that is opened in one direction only in the full length direction (Y direction in the drawing) of the first hollow resin spacer 2a is formed, but the second hollow resin spacer is formed. The circuit 2b is provided so that both ends of the first hollow resin spacer 2a in the full length direction are arranged in a direction (X direction shown) orthogonal to the full length direction (Y direction shown).

 As shown in FIG. 2, the first and second hollow resin spacers 2a and 2b have, for example, an r-plane dimension La of 6 mm and a flat plane dimension L b is a 2 mm flat ellipse.

 In general, the force in which LaZLb is provided in 2 to 5; the first and second hollow resin-made sliders 2a and 2b of such a flat elliptical shape are made of commercially available circular PP. It can be obtained by deforming a straw or polyethylene terephthalate (hereinafter simply referred to as PET) straw or the like.

 As described above, the heat exchange segment 1 according to the present invention is provided with the first and second flat resin elliptical spacers 2a and 2b. Therefore, for example, the heat exchange sheets 3a and 3b made of paper material imparted with heat conductivity, moisture permeability, flame retardancy, etc., such as calcium chloride impregnated paper, are used as the first hollow resin spacer. -In the case of bonding to 2a, the bonding area between the two can be increased and sufficient bonding strength can be obtained.

 On the basis of this, the number of fixed first and second hollow resin spacers 2a and 2b required to produce one heat exchange segment can be reduced. As shown in FIG. 3, when a plurality of heat exchange segments 1 are stacked, relatively large gas flow paths 4a and 4b can be formed, and low pressure loss can be achieved. .

In addition, since the flat elliptical first and second hollow resin spacers 2a and 2b cannot be rolled, they are easy to handle during the production of the heat exchange segment 1, and Heat exchange segment 1 is laminated because of flat elliptical shape When the heat exchange element 5 is formed by performing the heat exchange element 5, it is possible to stabilize the maintenance of the shape of the heat exchange element 5, thereby obtaining the heat exchange element 5 which is hardly deformed and has excellent shape stability. be able to.

 In addition, since the airtightness at both ends of the first hollow resin spacer 2a and the second hollow resin spacer 2b can be improved and gas leakage can be prevented, one of the gas flow paths It is possible to completely prevent gas mixing between the other gas flow paths.

 In addition, the flat elliptical first and second hollow resin spacers 2a and 2b have a large bending resistance in the width direction (La direction in FIG. 2), and therefore have a rigid It has such characteristics and the thickness (Lb dimension in FIG. 2) force; since it is small, it is possible to form the heat exchange element 1 by stacking more heat exchange segments 1 (1) Since the hollow resin spacer 2a and the second hollow resin spacer 2b are provided so as to be orthogonal to each other, it is possible to obtain a heat exchange segment 1 having appropriate rigidity and being hard to deform. it can.

 When laminating the heat exchange segments 1, the heat exchange segments 1 are fixed to each other by using an appropriate adhesive. Therefore, it is possible to easily obtain the heat exchange element 5 having a laminated structure whose perspective view is shown in FIG. The heat exchange sheet 3c is attached to the uppermost heat exchange segment 1.

 Then, according to the heat exchange element 5, the gas for heat exchange is supplied to one of the gas passages 4b and the other gas passage 4a formed in a direction orthogonal to the gas passage 4b. Heat can be exchanged by supplying air (dirty air) from the room to the gas passage 4b and supplying air (fresh air) from the outside to the other gas passage 4a.

This situation is shown in FIG. In the figure, an air-conditioning ventilation fan device 1 2 attached to an outer wall 11 of an office, etc., has a casing 1 The heat exchanger 14 and the ventilator 15 are installed in 3, and the heat exchange element 5 is installed in the heat exchanger 14.

 Then, a passage 16 for supplying air from the room to one of the gas passages 4b and a passage 17 for exhausting the gas passage 4b, and a passage 17 from the outside to the other gas passage 4a. Partition plates 20 to 23 and the like are provided so as to form a passage 18 for supplying air and a passage 19 for supplying air to the room.

 Since the heat exchange element 5 is a consumable item, it can be replaced with a new one as needed. The old heat exchange element 5 that has been replaced and removed can be easily discarded.

 Although one embodiment has been described above, in the present invention, the first and second hollow resin spacers 2a and 2b of the heat exchange segment 1 are two or more, that is, if necessary. A predetermined number can be selected.

Also, except that the second hollow resin spacer 2b is arranged in a direction (X direction in the drawing) orthogonal to the entire length direction (Y direction in the drawing) of the first hollow resin spacer 2a. In addition, for example, they may be provided so as to be arranged in a non-orthogonal direction as in a rhombic heat exchange segment. In short, the first hollow resin spacer 2 may be arranged in accordance with the plan view shape of the heat exchange segment. 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 a (Y direction shown). In addition, the first and second hollow resin spacers 2a and 2b are formed by deforming a commercially available circular PP mouthpiece or PET straw into a flat elliptical shape. the first flat oval by other methods, 2 hollow resin Seisupe Sa _{2 a,} 2 b may be molded, and, this time, C A_〇 powder in the molding material or C a _{CO: ) It is possible} to improve the fire resistance, adhesion and strength by mixing powder. Adhesion can be improved by mixing C a〇 powder or C a C 0 _{: 1} powder, etc. Because you can.

 The heat exchange segment 1 may have any shape such as a square, a rectangle, and a rhombus in plan view, and the heat exchange sheets 3a, 3b, and 3c may be made of any material other than the calcium chloride impregnated paper. Other dimensions may be used, and the dimensions of the respective parts of the flat ellipse may be appropriately set to predetermined dimensions.

 Further, the heat exchange sheets 3a and 3b are fixed (generally, bonded) to the flat hollow elliptical first hollow resin spacer 2a as shown in FIGS. 5 and 6. Is preferred.

 In FIG. 5, one end of each of the heat exchange sheets 3a and 3b is fixed only to the flat portion of the oblate first hollow resin spacer 2a (the other end not shown is also fixed). In FIG. 6, it is fixed to the flat portion and the r portion of the flat hollow elliptical first hollow resin-made spacer 12a (the other end (not shown) is also fixed). Is shown. Note that one heat exchange sheet may be wound and adhered to the first hollow resin spacer 2a group without being divided into the heat exchange sheets 3a and 3b.

Thus, by completely fixing both ends of the heat exchange sheets 3a and 3b to the first hollow resin spacer 2a, both ends of the heat exchange sheets 3a and 3b The disadvantage in the case where it is not completely fixed (for example, in FIG. 5, when the ends of the heat exchange sheets 3a and 3b are fixed only to the flat part and not fixed to the part r), When stacking the heat exchange segments, the free ends of the unfixed sheets obstruct the flow of gas and reduce the heat exchange performance, or the free ends of the sheets swing and discomfort sounds. It is preferable to completely fix both ends of the heat exchange sheets 3a and 3b, since the disadvantages that occur when (noise) occurs can be eliminated. The former (Fig. 5) is advantageous in terms of reducing the amount of heat exchange sheets 3a and 3b used, but in terms of adhesion (generally adhesion) strength. The latter (Figure 6) is advantageous. Second embodiment

 Similarly to the first embodiment, the heat exchange element 5 of the second embodiment is configured by a laminate of the heat exchange segments 1. Further, in the second embodiment, an emboss pattern is formed on the heat exchange sheets 3a and 3b constituting the heat exchange segment 1 as shown in FIG. That is, the lower heat exchange sheet 3a has the embossment 25a formed in a predetermined pattern (see FIG. 10), and the upper heat exchange sheet 3b also has the embossment 25b. Are formed in a predetermined pattern (see Fig. 9).

 As a result, the rigidity of the heat exchange sheets 3a and 3b is further strengthened and the heat exchange sheets 3a and 3b are hardly deformed. Therefore, when the gas is supplied to the gas flow paths 4a and 4b shown in FIG. In this case, it is possible to almost completely prevent the lower heat exchange sheet 3a and the heat exchange sheet 3b from being deformed so as to approach each other and coming into contact with each other. .

 In addition, the surface area of the heat exchange sheets 3a and 3b, which are brought into contact with the gas to be exchanged with heat, can be increased, and such gas can be supplied as shown by arrows in FIGS. 9, 10 and 12. The flow path can be lengthened because the gas flow can be branched or meandered in the gas flow paths 4a and 4b, so that the heat transfer property and the moisture transfer property can be improved as a synergistic effect. Can be.

The embossments 25a and 25b have a height H of 0, where G is the distance between the lower heat exchange sheet 3a and the upper heat exchange sheet 3b in FIG. The range is from 3 G or more to ◦. 7 G or less. However, if necessary, it may be provided in a range from 0.3 G or more to less than 1.0 G. Therefore, the channel 內 air flow is branched or meandered by embossing 25 a, 25. (See Fig. 12), the flow velocity and flow direction are disturbed in the flow path, causing turbulence, which is caused by laminar flow in the case of flat paper. Can break the boundary layer.

 As a result, an efficient counterflow is generated in the flow path by various combinations of the cross flow and the branch flow along the gas flow paths 4a and 4b, or the bent flow and the up-down flow. And the ability to transfer moisture can be further improved.

 As in the first embodiment, the heat exchange segments 1 are adhered to each other using an appropriate adhesive or an adhesive tape, and the heat exchange segments 1 are stacked.

 Therefore, it is possible to easily obtain a heat exchange element 5 having a laminated structure whose perspective view is shown in FIG. The uppermost heat exchange segment 1 is bonded to a heat exchange sheet 3c having no emboss. As in the first embodiment, the heat exchange element 5 on which the emboss pattern is formed is used for an air-conditioning ventilation fan device 12 attached to an outer wall 11 of an office or the like. Further, other embodiments relating to the shape of the heat exchange segment 1, the attachment of the heat exchange sheets 3a, 3b to the first hollow resin spacer 2a, and the like are the same as those in the first embodiment. Further, in the second example, in addition to the above-described embodiment, the following forms can be given with respect to the emboss pattern shape and the emboss arrangement.

 The embossment 25a provided on the lower heat exchange sheet 3a and the embossment 25b provided on the upper heat exchange sheet 3b are provided in predetermined patterns as necessary. Figs. 13 and 14 show other patterns of embossment 25a. Embossment 25b has the same pattern as that of embossment 25a, but the phase is shifted or the pattern direction is changed. Can be varied.

The vertical cross section of the embossed 25a, 25b is circular, frustoconical, etc. Such a shape may be used, and its planar shape may be any shape such as a dot shape, a linear shape, a broken line shape, a cross shape, and the like. Also, the heat exchange sheets 3a, 3b, 3c may be formed with irregularities by creasing creep (gather).

 Also, if necessary, embossings 25a and 25b may be provided on both or both of the lower heat exchange sheet 3a and the upper heat exchange sheet 3b. In the case where the embossment 25a is provided on both surfaces of the lower heat exchange sheet 3a, the provision of the embossment on the upper heat exchange sheet 3b can be omitted if not necessary.

 In short, regarding the pattern shape and the arrangement of the emboss, it is sufficient to provide the same pattern shape so as to maintain a relationship such that they do not overlap with each other in the stacking direction of the segments. It is sufficient to prevent the situation as shown in Fig. 15 from being changed.

 FIG. 16 shows the state of the gas flow at the place where the embosses 25a and 25b are not provided, and FIG. 17 shows the state where the embosses 25a and 25b are provided. (The embossed portion 25b is not shown in FIG. 17 but is the same as the gas flow condition at the point of the embossed portion 25a.) However, it can be understood that the latter is more advantageous than the former because turbulence can destroy the boundary layer, which degrades the performance of heat transfer and mass transfer. Third embodiment

As in the first and second embodiments, the heat exchange element 5 of the third embodiment is composed of a laminate of the heat exchange segments 1, and as in the second embodiment, as shown in FIG. The heat exchange that constitutes heat exchange segment 1 as shown Embossed patterns are formed on sheets 3a and 3b.

 Further, although the distance L between the r surfaces of the first hollow resin spacer 2a and that (L a) of the second hollow resin spacer 2b are provided equal to each other, the third embodiment Then, the distance Lb between the flat surfaces of the second hollow resin spacer 2b is 1.2 to 1.3 times that of the first hollow resin spacer 2a (Lb). Largely provided.

 As an example of the second hollow resin spacer 2b, r dimension L a is 5.0 mm, flat dimension L b is 2.0 mm, wall thickness is 0.1 mm, and total length is 1 7 1 mm, and as an example of the first hollow resin spacer 2a, r dimension L a is 5.0 mm, flat dimension L b force 1.6 mm, wall thickness is 0.1 mm, total length of 17 1 mm.

 As in the first embodiment, the heat exchange segments 1 are fixed to each other by using an appropriate adhesive or an adhesive tape.

 Therefore, as shown in a perspective view in FIG. 8, the heat exchange element 5 having a laminated structure can be easily obtained. At this time, the emboss is formed in the uppermost heat exchange segment 1. No heat exchange sheet 3c is glued. The heat exchange element 5 forms a gas passage 4a having a smaller opening area and a gas passage 4b having a larger opening area.

 That is, the gas flow path 4a and the gas flow path 4b have the same horizontal dimension, but as shown in FIG. 18, the height direction of the gas flow path 4b (Z direction) ) Is larger than the dimension Gb in the height direction (Z direction) of the gas flow path 4a. Therefore, when the inflow resistance of one gas (for example, gas A) and the discharge resistance of the other gas (for example, gas B) are in an unbalanced relationship, heat can be exchanged well.

More specifically, as shown in FIG. 19, gas A (outdoor air) flows into the room from the outside partitioned by the outer wall 11 and gas B from the room. In the case of heat exchange when discharging (indoor air) outside the room, the outside air at atmospheric pressure has no obstruction and is in a free state, so the resistance to inflow of outdoor air is small. Positive air discharge resistance due to the gap between the pod and the next room, the airtight state, the open / closed state of the door, etc., but the opening area of the gas passage 4 b of the heat exchange element 5 through which the gas B (room air) flows Since the gas flow path 4a through which the (outdoor air) flows is provided with a larger opening area, heat exchange can be performed while maintaining the pressure loss difference ΔΡ at 3 Pa or less. The air-conditioning ventilation fan device shown in the figure is configured by mounting an exhaust fan 15a, an intake fan 15b, a filter 26, and a heat exchange element 5 in a casing 13, and The element 5 is exchangeably mounted on a support 27 mounted on a casing 13.

 At this time, the gas flow paths 4a, 4b are compressed in the Z direction by predetermined means (not shown), and the height dimensions G a, G b of the gas flow paths 4a, 4b are adjusted to a predetermined value. Therefore, although G a and G b are smaller than L b, such adjustment is performed because the first and second hollow resin spacers 2 a and 2 b have a property. be able to.

 Since the distance Lb between the flat surfaces of the first hollow resin spacer 2a and the distance Lb between the flat surfaces of the second hollow resin spacer 2b are provided in different sizes, the heat exchange element Even when 5 is compressed in the Z direction, the height dimensions G a and G b of the gas flow paths 4 a and 4 b do not become the same (G a = G b), and the dimensional difference between the two is kept constant. Dripping.

In the above description, the relation of G a> G b is provided. However, the relation of G a and G b, if necessary, that is, the distance between the flat surfaces of the second hollow resin spacer 2 b The dimension Lb between the flat surfaces of the first hollow resin spacer 1a may be larger than the dimension L. This arrangement also reduces the inflow resistance of one gas and the discharge resistance of the other gas. Good heat exchange can be achieved in a balanced relationship. Also, a difference is formed between the flat surface dimensions Lb of the flat elliptical first and second hollow resin spacers 2a and 2b, instead of the flat dimensions Lb between them. The reason is that, if a difference is formed between the inter-plane dimensions L a, a difference is formed in the application width of the adhesive for fixing the heat exchange sheets 3 a and 3 b, and the sheet fixing becomes imbalanced. This causes deterioration of heat transfer and moisture permeability.

 Also, it is preferable to provide the embossments 25a and 25b, but they can be omitted when not necessary, and the vertical cross-sectional shape can be any shape such as a circle or a truncated cone. The planar shape may be any shape such as a point shape, a linear shape, a broken line shape, a cross shape, and the like. The pattern to be formed may be any pattern. In addition, the heat exchange sheets 3a, 3b, 3c may be formed with unevenness by crepe (gather) in the form of wrinkles.

 In addition, the other examples relating to the shape of the heat exchange segment 1, the attachment of the heat exchange sheets 3a and 3b to the first hollow resin spacer 2a, and the like, are also described in the first embodiment and the second embodiment. Same as the example. Industrial applicability

 As described above, the gas-to-gas heat exchange element according to the present invention is suitable for being mounted on an air-conditioning ventilation fan device used in a house or office.

Claims

The scope of the claims 1. A gas-to-gas heat exchange element comprising a heat exchange segment in which a plurality of hollow resin spacers are fixedly attached to one surface of a heat exchange sheet at predetermined intervals,  The hollow resin-made spacer has a flat elliptical shape, and is disposed so that a flat portion thereof is in contact with the heat exchange sheet. 2. The gas-to-gas heat exchange element according to claim 1,  The hollow resin spacer includes a first hollow resin spacer and a second hollow resin spacer. The first hollow resin spacer is disposed between the first hollow resin spacers. A plurality of the first hollow resin spacers are fixed at predetermined intervals to a heat exchange sheet so as to form a gas flow path opened in one direction only in the entire length direction of the first hollow resin. A plurality of the second hollow resin spacers are fixed on the heat exchange sheet at predetermined intervals in a direction intersecting the full length direction of the spacer. 3. The gas-to-gas heat exchange element according to claim 2,  The flat surface dimension of the flat ellipse of the first hollow resin spacer is different from the flat surface size of the flat ellipse of the second hollow resin spacer.  4. The gas-to-gas heat exchange element according to claim 1, The hollow resin spacer includes a first hollow resin spacer and a second hollow resin spacer, and the first hollow resin spacer is disposed between the first hollow resin spacers. A plurality of the first hollow resin spacers are fixed at predetermined intervals to a heat exchange sheet so as to form a gas flow path that is opened in only one direction only in the entire length direction of the spacers. A plurality of the second hollow resin spacers are fixed on the heat exchange sheet at predetermined intervals in a direction orthogonal to the first hollow resin spacers. 5. The gas-to-gas heat exchange element according to claim 4, wherein a flat inter-planar dimension of the flat ellipse of the first hollow resin spacer and a flat ellipse of the second hollow resin spacer. The dimension between the flat surfaces is set differently. 6. The gas-to-gas heat exchange element according to claim 1,  An embossed pattern is formed on the heat exchange sheet. 7. The gas-to-gas heat exchange element of claim 6, wherein  Assuming that the distance between the lower heat exchange sheet and the upper heat exchange sheet is G, the height H of the emboss is in the range of 0.3 G or more to less than 1.0 G. 8. The gas-to-gas heat exchange element according to claim 1,  One end of the heat exchange sheet is fixed only to the flat portion of the hollow resin spacer.  9. The gas-to-gas heat exchange element of claim 1,  One end of the heat exchange sheet is fixed to a flat portion and a curved portion of the hollow resin spacer.  10. The gas-to-gas heat exchange element of claim 1,  The heat exchange sheet is formed of a paper material having heat conductivity, moisture permeability, and flame retardancy.  1 1. The gas-to-gas heat exchange element according to claim 1,  The heat exchange sheet is formed of calcium chloride impregnated paper.  12. The gas-to-gas heat exchange element according to claim 1,  The heat exchange element for gas-to-gas is constituted by inserting the laminated body of the heat exchange segments between the support members composed of the lower claws and the upper claws. 13. The gas-to-gas heat exchange element of claim 1, A powder of Ca〇 or a powder of Ca CO: is mixed into the hollow resin-made spacer and molded. Claims of amendment  [February 6, 2001 (06.02.01) Accepted by the International Bureau: Claims 5'11 and 12 at the time of filing were withdrawn; Claims at the time of filing were 1, 4, 6, 8 — 10 and 13 have been amended; other claims remain unchanged. (2 pages)] 1. (After correction) A gas-to-gas heat exchange element comprising a heat exchange segment in which a plurality of hollow resin spacers are fixed at predetermined intervals on one side of a heat exchange sheet,  The hollow resin spacer is provided in a flat elliptical shape.  2. (After Correction) A gas-to-gas heat exchange element comprising a stack of heat exchange segments composed of a plurality of flat elliptical hollow resin spacers and a heat exchange sheet,  The hollow resin spacer includes a plurality of first hollow resin spacers and a plurality of second hollow resin spacers, and the heat exchange sheets are arranged at predetermined intervals. (1) The first hollow resin spacer is formed so as to form a gas flow path opened in one direction only in the entire length direction of the first hollow resin spacer between the hollow resin spacers. The second hollow resin spacer is fixed and arranged on the heat exchange sheet at a predetermined interval in a direction intersecting the full length direction of the first hollow resin spacer.  3. (After correction) In the gas-to-gas heat exchange element according to claim 2,  The first hollow resin spacer and the second hollow resin spacer are disposed in directions orthogonal to each other.  4. (After correction) In the gas-to-gas heat exchange element according to claim 2 or 3,  The flat surface dimension of the flat ellipse of the first hollow resin spacer is different from the flat surface size of the flat ellipse of the second hollow resin spacer.  5. (Delete) 6. (After correction) The gas-to-gas heat exchange element according to claim 2, 3, or 4, 18 Amended paper (Article 19 of the Convention) An emboss pattern is formed on the heat exchange sheet.  7. The gas-to-gas heat exchange element according to claim 6,  Assuming that the distance between the lower heat exchange sheet and the upper heat exchange sheet is G, the height H of the emboss is in the range of 0.3 G or more to less than 1.0 G. 8. (After correction) In the gas-to-gas heat exchange element according to claim 2, 3, or 4,  One end and the other end of the heat exchange sheet are fixed only to the flat portion of the first hollow resin spacer.  9. (After correction) In the gas-to-gas heat exchange element according to claim 2, 3, or 4,  One end and the other end of the heat exchange sheet are fixed to a flat portion and a curved portion of the first hollow resin spacer.  10 (after correction) The gas-to-gas heat exchange element according to claim 1, 2, 3, or 4,  The heat exchange sheet is formed of a paper material having heat conductivity, moisture permeability, and flame retardancy.  1 1. (Delete) 1 2. (Delete)  1 3. (After correction) In the gas-to-gas heat exchange element according to claim 1, 2, 3, or 4, Wherein the hollow resin spacers one is C a O flour or C a C_〇 ₃ powder are mixed. 19  Paper captured (Article 19 of the Convention)