JPH07103681A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger in which adhesion of a protruding stripe for a spacer for holding a gap between laminated heat exchanging plates to a partition material made of paper material sheet have been improved, can be effectively adhered without making a gap to surfaces to be adhered, elongation and contraction of the material can be allowed by moisture absorption and drying and a heat exchanging efficiency can be preferably held. CONSTITUTION:Protruding stripes 3 for spacers formed by foaming and coating hot-melt resin on one side of a square partition material 2 made of paper material sheet having heat transferability and moisture absorption properties to be adhered and solidified are provided in an aligned state at a specific interval in parallel with the one of the two opposed sides. Simultaneously, end materials of a reduced width plate state formed of a synthetic resin material, etc., are attached to ends of both sides to form a heat exchanging plate 1 as a unit member. A plurality of the plates 1 are alternately laminated in a direction crossing the stripes 3, and a plurality of rows of channels 4 formed of the stripes 3 are alternately formed in a crossing direction in a gap between the plates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-flow type heat exchanger having a laminated structure which is a main component of an air conditioner.

[0002]

2. Description of the Related Art A heat exchanger of an air conditioner for indoor ventilation has a large heat transfer area per unit volume, is relatively small in size and has high efficiency. The vessel is widely used. In an air conditioner, a cross flow type (including orthogonal or oblique) as shown in FIG. 9 and a counter flow type (not shown) are often used depending on the flow of two fluids to be heat-exchanged.

In a conventional cross-flow type heat exchanger, heat exchanging partitioning materials for separating two fluids to be heat-exchanged are laminated with corrugated plate-shaped fins forming parallel flow passages in a plurality of rows. It was something that was done. Usually, a quadrangular unit member composed of a partition member and a corrugated plate-shaped fin is prepared in advance, and the unit members are laminated so that the flow passages alternately intersect each other. Heat is exchanged by alternately passing two fluids through the flow passages. The partition material for heat exchange in this unit member is made of a paper material based on Japanese paper that has both heat conductivity and hygroscopicity, and the fins are made of corrugated plate material similar to the partition material. Things were being used.

However, in the conventional heat exchanger using the corrugated plate-shaped fins as described above, the flow passages have narrow meshes, the flow resistance of fluid is large, and a large capacity fan is required. There were drawbacks such as noise.

Therefore, in recent years, as a plate fin type heat exchanger having a laminated structure of this type, it is disclosed in JP-B-3-7379.
As seen in Japanese Patent Publication No. 6, a unit member formed by arranging linear spacing members forming parallel flow passages at predetermined intervals in a row on one surface of a partition material for heat exchange made of paper material. Has been proposed, in which two fluids to be heat-exchanged are alternately passed through the flow passages between the plates by forming a heat-exchange plate as described above and stacking a plurality of the heat-exchange plates. There is.

[0006]

However, in the case of the heat exchanger using the above-mentioned heat exchange plate, the distance between the spacing members attached to the partition material of each heat exchange plate is large and the flow resistance is reduced. However, since a rod-shaped material formed of a synthetic resin material is used as the spacing member and is adhered to the surface of the partition member by an adhesive means such as hot melt, it is not easy to attach the spacing member to the partition member. Above, there were the following problems.

That is, as the partition material, in order to secure heat transfer and hygroscopicity and increase the contact area of air,
A wrinkle-processed (corrugated) sheet made of a paper material such as Japanese paper is often used. Therefore, the surface of the partitioning material has wrinkles and is slack, and it is not easy to bond the rod-shaped spacing member to the surface of this partitioning material, and a gap is created in the bonded portion, resulting in poor adhesion. Then, there was a problem of peeling during use.

Moreover, the partition material made of paper material is
Although it expands and contracts due to moisture absorption and drying, if the rod-shaped spacing member formed of a synthetic resin material or the like is adhered as described above, this becomes a resistance against the expansion and contraction of the partition member and restricts expansion and contraction. Therefore, there is a risk that the heat exchange efficiency may be reduced.

The present invention has been made in view of the above, and in order to maintain a gap between laminated heat exchange plates to form a flow path, a partition material made of a paper sheet is provided with a hot-melt resin on one side. By providing the spacer convex strips by coating formation, the adhesiveness between the spacer convex strips and the partitioning material is improved, and it is possible to securely bond without creating a gap on the bonding surface. It is intended to provide a heat exchanger capable of allowing expansion and contraction and maintaining good heat exchange efficiency.

[0010]

SUMMARY OF THE INVENTION According to the present invention for solving the above problems, a plurality of heat exchange plates are laminated so as to form a flow path between the plates, and two fluids to be heat-exchanged form one layer. It is a heat exchanger that is made to pass alternately one by one.The heat exchange plate is made by foaming a hot melt resin on one side of a rectangular partitioning material made of a paper sheet having heat conductivity and hygroscopicity, and solidifying by adhesion. A plurality of spacer ridges to be formed are provided in parallel at a predetermined interval substantially parallel to both opposite sides of one side, and a narrow plate formed of a synthetic resin material or the like at the ends of both sides parallel to the ridges. -Shaped end pieces are attached, and a plurality of the heat exchange plates are alternately laminated one by one in the direction in which the convex ridges for the spacers intersect with each other, and a double row of the convex ridges is provided in the gap between the heat exchange plates. It is characterized in that the flow passages of 1 are formed one by one in the intersecting direction.

In the above heat exchanger, on the other surface of the partition member constituting the heat exchange plate, a narrow plate-like member made of a synthetic resin material or the like is formed at the ends of both sides intersecting with the spacer protrusions. A scrap material is attached, and the scrap material and the scrap material on one side are made to have a thickness substantially corresponding to the height of the spacer ridges in the joined state of the scrap materials, and the heat exchange plates are alternately oriented one by one. It is preferable that the end material on one surface of the heat exchange plate and the end material on the other surface of the adjacent heat exchange plate are in contact with each other in the state of being converted and laminated.

[0012]

According to the above heat exchanger, the spacer ridges for forming the flow passage by holding the gaps between the laminated heat exchange plates are formed by foaming and applying the hot melt resin. Since it is attached to the surface of the partitioning material, it has good adhesion to the partitioning material, and whether the partitioning material is a paper sheet that has been wrinkled or has slack, its surface shape Can be flexibly dealt with and can be adhered without creating a gap.

Moreover, since the hot melt resin is foamed and applied, the height required for the spacer ridge can be maintained without increasing the spread of the application width so much. Further, the ridges for spacers have a certain elasticity due to foaming, and the resistance against expansion and contraction due to moisture absorption and drying of the partitioning material is also reduced.

Further, the heat exchange plate as a unit member has a narrow plate-like end material formed of a synthetic resin material or the like at the ends of both sides of the partition material made of a paper sheet which are parallel to the spacer projections. Since the heat exchanger plates are attached, by alternately changing the direction of the heat exchange plates one by one and stacking the heat exchanger plates, the end pieces are alternately present on each side of the heat exchanger having a laminated structure. As a result, it is possible to shield the lateral sides of the flow passages that are alternately formed for each layer and to secure the shape retention in the laminated state. In particular, at the four corners, since the heat exchange plates are directly stacked via the end material having rigidity, it is possible to hold the predetermined stacked state by pressing at the four corners.

Further, as in claim 2, when a narrow plate-shaped end material is attached to the other surface of both side ends intersecting with the spacer projection, the heat exchange plates are alternately oriented. When converted and laminated, the end material on one surface of the heat exchange plate will be in contact with the end material on the other surface of the heat exchange plate adjacent to it on the surface,
Even if they are not adhered, they can be laminated without creating a gap in the contact portion.

[0016]

Embodiments of the present invention will now be described with reference to the drawings.

The embodiment shown in FIG. 1 is a heat exchanger used in the field of air conditioning, and is a cross-flow type heat exchanger (A) in which two fluids to be heat-exchanged flow substantially at right angles. Shows,
The heat exchanger (A) will be described.

This heat exchanger (A) comprises a heat exchanging plate (1) shown in FIGS. 2 and 3 in which a spacer ridge (3) is provided on one surface of a rectangular partition member (2) made of a paper sheet. A plurality of sheets are laminated by a spacer ridge (3) so as to have a required gap, the gap between the plates is configured as a flow passage (4), and a flow passage (partitioned by the heat exchange plate (1) ( The two fluids to be heat-exchanged in 4) are alternately passed through one layer by one layer.

The heat exchange plate (1) as a unit member constituting the heat exchanger (A) is constructed as follows.

The partition material (2) is made of a paper material such as Japanese paper having heat conductivity and moisture permeability and has a thickness of 0.05 m.
The sheet is made of a paper sheet having a size of about m to 0.2 mm, and is usually used after being wrinkled in order to increase the contact area with the fluid, but there is no particular limitation as long as it is a hygroscopic paper sheet.

On one surface of the partition member (2), spacer ridges (3) are provided so as to have a gap as a flow passage between the heat exchange plates (1) so as to face each other at a predetermined interval. A plurality of them are provided in parallel in a direction substantially parallel to both sides.

The ridge (3) is formed by pouring out and foaming a hot-melt resin such as ethylene-vinyl acetate resin, applying it in a substantially straight line, and adhering and solidifying it. As shown in FIG. It is possible to flexibly deal with the uneven shape of the surface due to wrinkles and slack of (2), and it is possible to bond without a gap. In particular, when the hot melt resin is foamed several times (usually 1.1 to 4 times) and applied, the absolute amount of the resin is small and the cooling and solidification is quicker than in the case of non-foaming application. The installation work by means of becomes easy. This hot melt resin can be applied by using an existing applicator.

Further, since the hot melt resin is foamed and applied, it is possible to maintain a relatively high convex shape without increasing the spread of the application width.

For example, when hot-melt resin is applied in a non-foaming manner, as shown in FIG. 5B, the height (h) is 2 mm and the width (w) is wider than 4 mm. However, when foamed and applied as described above, even if the height (h) is 2 mm and the width (w) is 2.5 mm or less, as shown in FIG. In addition, since the solidification occurs with almost no variation in height, the height required for the spacer can be secured without making the coating width (or the foam diameter of the spouted foam) so large, and it can be easily implemented.

Further, at the ends of both sides parallel to the spacer protrusions (3) provided on one surface of the partition member (2), narrow plate-like end members made of non-foaming synthetic resin material or the like are provided. (6) is attached by an adhesive means such as a rubber adhesive or a hot melt adhesive.

Further, in the embodiment shown in the drawings, a narrow plate formed of a non-foaming synthetic resin material or the like is formed at the end portions of both sides of the other surface of the partition member (2) intersecting with the spacer protrusions (3). The end material (7) in the shape of a circle is attached by an adhesive means. The mill ends (7) and the one-side mill ends (6) are formed to have a thickness substantially corresponding to the height of the spacer protrusions (3) in the joined state. For example, the thickness of both end members (6) and (7) is formed to be approximately ½ of the height of the spacer ridge (3). As a result, when the heat exchange plates (1) are alternately turned by 90 ° and laminated, the end material (6) on one surface of the heat exchange plate (1) and the heat exchange plate adjacent thereto. The end material (7) on the other surface of (1) is in contact with the surface.

A heat exchanger (A) according to the present invention is constructed by laminating the heat exchange plates (1) having the above-mentioned structure. In particular, in this case, the spacers are alternately changed in direction by 90 °. By stacking the projecting ridges (3) in the intersecting direction, the double-row flow passages (4) formed by the ridges (3) are provided in the gap between the heat exchange plates (1) (1) one by one in the intersecting direction. To form. Accordingly, two fluids to be heat-exchanged are alternately passed through the flow passage (4) partitioned by the heat exchange plate (1), one layer by one layer, as shown in FIG. A) is obtained.

For stacking the heat exchange plates (1), a cage-shaped holding frame (10) having angle members (11) arranged at four corners is usually used as shown in FIG. 6, and this holding frame is used. (1
Using the angle member (11) of (0) as a guide, each heat exchange plate (1) is changed in direction one by one and fitted inside and laminated.

At this time, the partition material (2) constituting the heat exchange plate (1) is provided with narrow plate-shaped end material (6) at both ends parallel to the spacer projections (3). And ridge (3)
Since the end material (7) is attached to the other surface of the ends of both sides intersecting with, the end material with shape retention exists on the four circumferences, and the heat exchange plate (1) is kept square. Thus, the stacking work by incorporating the holding frame (10) can be easily performed.

Moreover, in the laminated state as described above,
Since the end material (6) of one side of the heat exchange plate (1) whose direction is alternately changed and the end material (7) of the adjacent heat exchange plate (1) are in face contact with each other, this contact portion is bonded. Even if it does not, it is possible to surely shield the side of the flow passage (4).

Moreover, the end pieces (6) and (7) are passed between the angle pieces (11) so that one layer is alternately present on each side of the heat exchanger. Especially, in the four corners, As described above, the end materials (6) (7) having the rigidity as described above and the partition material (2) are directly stacked without a gap. By pressing the four corners, each heat exchange plate (1) Can be reliably held at a constant interval.

Air on the supply side (primary side) is supplied to the flow passage (4) of one system in the same direction, and air on the exhaust side (secondary side) is supplied to the flow passage (4) of the other system. If it passes through, heat exchange will be performed between both air like a heat exchanger of this kind to date.

The wrinkle-made partition material (2) made of a paper sheet expands and contracts due to moisture absorption and drying accompanying air circulation, and the spacer ridges (3) attached thereto are expanded and contracted. Since the hot-melt resin is foamed and applied as described above, it has elasticity to some extent, and resistance against expansion and contraction of the partition member (2) is formed separately from a rigid member. It is smaller than the case where it is fixed by adhesion, and its expansion and contraction action can be sufficiently tolerated.

Therefore, the heat exchange efficiency through the partition member (2) made of the wrinkled paper sheet does not decrease.

The present invention can be carried out by omitting the end material (7) on the other surface of the heat exchange plate (1). In this case, as shown in FIG. The thickness of the end material (6) at both end portions parallel to 3) may be set to be substantially the same as the height of the ridge (3).

Also in this embodiment, each heat exchange plate (1)
By changing the direction of each layer by 90 ° and stacking the layers, the flow passages (4) can be alternately formed in the intersecting direction as shown in FIG. 8 and the sides of the flow passages (4) can be shielded. Further, the assembling and stacking work for the holding frame is easy to perform, and in particular, the four corners are stacked without gaps through the end pieces (6), and thus the stacked state is surely held.

Further, the present invention can also be implemented in a heat exchanger of oblique AC type. In this case, the partition material made of a paper sheet is formed into a substantially rhombic rectangular shape, and on one surface thereof, a heat exchange plate provided with spacer ridges and end materials parallel to both opposite sides of one of them on the other side, and the other side. By using a ridge for a spacer parallel to both sides facing each other and a heat exchange plate provided with a scrap material, and alternately stacking these two heat exchange plates, one layer of a flow passage is formed by the ridge between the heat exchange plates. It will be possible to configure in a diagonal direction.

[0038]

As described above, according to the heat exchanger of the present invention, the hot-melt resin is used as the ridges for the spacers of the heat exchange plates as the laminated unit members, and this is foamed and applied. Since it is attached to the partition surface by
Not only is the attachment work easy, but the adhesiveness with the partition material made of paper-based sheets is good, and it is possible to flexibly adapt to the surface shape of partition materials such as wrinkled paper-based sheets, and there are no wrinkles or slack. However, there is almost no effect, and reliable and strong adhesion can be achieved without creating a gap, and there is no risk of peeling during use.

Moreover, since the foamed ridges for spacers themselves have elasticity to some extent, resistance to expansion and contraction due to moisture absorption and drying of the partition material is small, and the expansion and contraction action can be allowed, and the paper-like sheet has The loss of heat exchange efficiency can be suppressed.

Further, by foaming and coating the hot-melt resin, the height required for the spacer can be secured without increasing the coating width so much, and the amount of resin used is also non-foamed. Compared with this, the number of heat exchangers can be reduced, and the weight of the heat exchange plate and thus the heat exchanger can be reduced.

Further, narrow plate-shaped end members made of a synthetic resin material or the like are attached to the ends of both sides of the partitioning member constituting the heat exchange plate, which are parallel to the protruding ridges for spacers. The shape-retaining properties of the heat exchange plates laminated by changing the direction can be secured by this, and in particular, at the four corners, since they can be stacked without gaps through the end materials having rigidity, the four corners can be angled, etc. The laminated state can be satisfactorily maintained by incorporating it in a holding frame made of and pressing it at these four corners.

In particular, as in the second aspect of the present invention, a narrow plate-like end material is attached to the other surface of both side ends intersecting with the spacer projections so that the adjacent heat exchange plates are When the end material on one surface is brought into contact with the end material, the end material can be stacked without forming a gap at the contact portion, and a stable heat exchanger can be configured.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of a heat exchanger showing one embodiment of the present invention is omitted.

FIG. 2 is a perspective view showing a heat exchange plate as a unit member of the heat exchanger.

FIG. 3 is a perspective view of a back surface of the heat exchange plate of the above.

FIG. 4 is a partial enlarged cross-sectional view showing a state of adhesion of a partition member and spacer ridges formed by applying a hot melt resin.

FIG. 5 is an enlarged cross-sectional view showing a solidified state (a) when a ridge made of hot-melt resin is applied by foaming and a solidified state (b) when applied by non-foaming.

FIG. 6 is a perspective view showing a state in which heat exchange plates are incorporated into a holding frame and stacked.

FIG. 7 is a partial enlarged perspective view showing a state in which heat exchange plates are incorporated into a holding frame and stacked.

FIG. 8 is a partial enlarged perspective view showing a state in which heat exchange plates of another embodiment are stacked.

FIG. 9 is a schematic view showing an example of use of a cross flow type heat exchanger.

[Explanation of symbols]

 (A) Heat exchanger (1) Heat exchange plate (2) Partition material (3) Spacer ridges (4) Flow path (6) End material (7) End material (10) Holding frame (11) Angle material

Claims (2)

[Claims] 1. A heat exchanger in which a plurality of heat exchange plates are laminated so as to form a flow path between the plates, and two fluids to be heat-exchanged are alternately passed through one layer at a time. The heat exchange plate is a square partition made of a paper sheet having heat conductivity and moisture absorption, and one side of which has spacer protrusions formed by applying hot-melt resin by foaming it and then solidifying the adhesive. A plurality of thin plate-shaped end pieces made of synthetic resin or the like are attached to the ends of both sides parallel to the ridges in parallel with each other at a predetermined interval substantially parallel to the heat exchange. A plurality of plates are alternately stacked one on top of the other so that the spacer projections intersect each other, and a plurality of rows of flow passages defined by the projections are formed in the gap between the heat exchange plates in the crossing direction. A heat exchanger characterized by being formed. 2. The other surface of the partition member constituting the heat exchange plate,
A narrow plate-shaped end material formed of a synthetic resin material or the like is attached to the ends of both sides intersecting with the spacer protrusions, and the end material and the one-sided end material are spacers when the two are joined. The heat exchange plate has a thickness substantially corresponding to the height of the projecting strip, and the other surface of the heat exchange plate adjacent to the end material on one side of the heat exchange plate in the state where the heat exchange plates are alternately changed in direction and laminated. The heat exchanger according to claim 1, wherein the heat exchanger is configured so as to be in contact with the end material.