KR101551820B1 - Manufacturing method of heat exchange unit using pre-coating treatment - Google Patents

Abstract

The present invention relates to a method of manufacturing a heat transfer element using pre-coating pretreatment having a remarkably improved productivity and process convenience and having excellent heat transfer efficiency. Preparing a spacer for forming the liner and the flow path for this purpose; Coating the bonding layer on the spacer, liner or spacer and the liner; And a step of pressing the spacer having the bonding layer formed thereon through a cologation process and bonding the spacer to the liner. The present invention also provides a method of manufacturing a heat transfer device using the pretreatment. According to the present invention, it is possible to simplify the complicated adhesive application process and laminating process, and dramatically improve the production efficiency, so that the heat transfer device having high quality can be produced with ensuring price competitiveness. Further, since the application process of the adhesive is simplified and the precise control of the detailed conditions of the process is not required comparatively, it is possible to add heat transfer means or moisture absorption means for improving the heat transfer efficiency of the heat transfer element, The efficiency of the heat transfer element can be improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a heat transfer element using a pre-

The present invention relates to a method of manufacturing a heat transfer element using pre-coating pretreatment, more specifically, to a method of manufacturing a heat transfer element using pre-coating pretreatment having a remarkably improved productivity and process convenience as well as excellent heat transfer efficiency .

The heat recovery ventilating type total enthalpy heat exchanger is a heat exchange device that ventilates indoor air and simultaneously performs heat exchange between exhaust and air supply. This conveys the heat of the air exhausted to the outside to the air supplied to the room while ventilating indoor and outdoor air, thereby enabling efficient use of energy, thereby preventing sudden temperature changes in the room.

1 and a partial sectional view of the heat transfer element used in this total heat exchanger are shown in Fig. FIG. 1 is a perspective view for explaining a structure of a heat transfer element, and FIG. 2 is a cross-sectional view illustrating a bonding state of a liner and a spacer in the heat transfer element of FIG.

1 and 2, the heat transfer element 13 includes a liner 24 provided in a flat plate shape and a corrugation spacer formed in a sinusoidal shape so as to be coupled to one surface of the liner 24 through an adhesive or the like. And a base unit 23 are stacked in this order. Each of the spacers 23 is disposed so as to be orthogonal to the adjacent spacers 23. One of the spacers 23 forms an exhaust layer 21 formed to communicate with the exhaust passage and the other has a supply layer 22 formed to communicate with the air- . Such a spacer also serves as a support for maintaining the shape of the heat transfer element.

Here, the heat exchange between the exhaust and the supply period is mainly performed through the liner 24. [ Therefore, the heat exchange performance of the heat recovery ventilating type heat exchanger depends on the properties of the selected liner, and attempts have been made to use various materials as liners.

In order to manufacture the spacer having the exhaust gas and the spacer having the supply air so as to be orthogonal to each other with respect to the manufacturing process of the heat transfer device, corrugation of the corrugated wrinkles, which are brought into contact with the liner using the adhesive, And the adhesive is applied to the acid portion of the spacer having cross-links by hand. 3 is a conceptual diagram for explaining a method of manufacturing a conventional heat transfer element.

3, the liner 24 is supplied by the pressure roller 30, and the spacer 23 is connected to the upper and the lower corrugators 40 and 42 in a corrugated form do. In order to bond the spacer 23 and the liner 24 to each other, an adhesive is applied to the spacer, which is applied to the corrugated spacer 23 by the adhesive coating drum 44 in a container containing the adhesive .

At this time, the adhesive is not applied to the entire surface of the spacer 23 but mechanically so as to be adhered only to the protruding acid portion of the spacer 23 to be bonded to the liner 24.

In this case, however, the position of the lower collet 42 and the adhesive coating drum 44 must be precisely adjusted so that the adhesive can be applied only to the projected mountain portion of the spacer, The physical properties of the adhesive, especially the viscosity, etc., should be optimized in order to prevent problems such as flow and consequently blocking the flow path.

However, since the materials of the fragile liner and the spacer are various, and thus the adhesive material capable of bonding them must be selected differently from one process to another, such optimization is very difficult, and accordingly, the process efficiency, productivity and convenience are considerably low to be.

And because the choice of adhesive is important, adding materials that can improve heat transfer to the adhesive is also difficult to do because of the rigorous testing procedures. In addition, if the above-mentioned process optimization is not performed, a large number of defective products are generated, which causes a great economic loss and waste of resources.

Therefore, it is required to develop a new manufacturing method that can improve the inefficiency of the process and the difficulty of manufacturing the thermoelectric element.

Korean Patent No. 10-1206150 (issued on November 22, 2012) Korean Patent No. 10-0737695 (published on Mar. 3, 2007) U.S. Published Patent Application No. 2006/0168813 (published Aug. 3, 2006)

It is an object of the present invention to improve the production efficiency of a heat transfer element composed of a liner and a spacer and to add an additional layer or material capable of promoting heat transfer to the bonding layer so as to improve productivity, And to provide a method of manufacturing a heat transfer element capable of improving heat transfer efficiency.

According to an aspect of the present invention, there is provided a method of manufacturing a heat transfer element by bonding a wavy spiral spacer forming a flow path to a liner in an embodiment of the present invention, ; Coating the bonding layer on the spacer, liner or spacer and the liner; And a step of pressing the spacer having the bonding layer formed thereon through a cologation process and bonding the spacer to the liner. The present invention also provides a method of manufacturing a heat transfer device using the pretreatment.

According to the present invention, it is possible to simplify the complicated adhesive application process and laminating process, and dramatically improve the production efficiency, so that the heat transfer device having high quality can be produced with ensuring price competitiveness.

Further, since the application process of the adhesive is simplified and the precise control of the detailed conditions of the process is not required comparatively, it is possible to add heat transfer means or moisture absorption means for improving the heat transfer efficiency of the heat transfer element, The efficiency of the heat transfer element can be improved.

Such a manufacturing method can be applied not only to the manufacture of heat transfer devices but also to the manufacture of structures in various fields in which a process similar to the process of bonding liner and spacer is used. As a result, it can contribute to the effective use and saving of energy.

1 is a perspective view illustrating a structure of a general heat transfer element.
FIG. 2 is a cross-sectional view illustrating a bonding state of a liner and a spacer in the heat transfer element of FIG. 1. FIG.
3 is a conceptual diagram for explaining a method of manufacturing a conventional heat transfer element.
4 is a flowchart illustrating a method of manufacturing a heat transfer element according to the present invention.
5 is a cross-sectional view illustrating a heat transfer device according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method of manufacturing a heat transfer device using a precoat according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view illustrating a structure of a heat transfer element.

Referring to FIG. 1, the heat transfer device according to the present invention includes a liner and a spacer formed to flow air in a direction crossing the liner. FIG. 1 shows a general heat transfer element shape. In the case of the present invention, a manufacturing method for manufacturing a general heat transfer element in a simple process is shown.

FIG. 4 is a flowchart illustrating a method of manufacturing a heat transfer device according to the present invention, and FIG. 5 is a cross-sectional view illustrating a heat transfer device according to the present invention.

Referring to FIG. 4, a method of fabricating a heat transfer element using pre-coating pretreatment according to an embodiment of the present invention includes preparing a liner and a spacer forming the flow path (step S100) After the bonding layer is pre-coated on the liner (step S200), the spacer having the bonding layer formed thereon is pressed through the cologation process and bonded to the liner (step S300).

First, in the method of manufacturing a heat transfer element according to an embodiment of the present invention, the liner and the spacer forming the flow path are prepared (step S100).

The liner and the spacer may be made of a metal such as aluminum, paper, or various polymeric synthetic resins. Here, the polymer synthetic resin may be a urethane, nylon, polyester, polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polysulfone (PS), polycarbonate (PC), polyimide Vinyl chloride (PVC), and the like.

These materials have advantages and disadvantages. When synthetic resin is used as a liner or a spacer, there is no fear that the heat transfer element will corrode when moisture is generated in the process of exchanging heat between the exhaust gas and the supply air at different temperatures. The durability is improved and the room air can be prevented from being contaminated by the corrosive substance generated in the air passage.

On the other hand, when the paper is used as a liner or a spacer, the weight of the heat transfer element is increased and the heat transfer coefficient of the paper is very low at 0.15 to 0.18 Kcal / mh 캜. Thus, there is a problem that heat transfer is not smooth. (About 0.24 Kcal / mhr ° C in the case of PP). At this time, when the synthetic resin is thinly processed to a film shape of about 5 to 20 μm or less and used as a liner, the heat stored in the liner layer itself can be minimized, thereby increasing heat transfer efficiency between the exhaust and the supply air, There is no problem in doing that.

However, even when synthetic resin is used instead of paper as a liner or a spacer, there is still a problem of lower heat transfer efficiency than a metal such as aluminum. Therefore, heat transfer to the synthetic resin liner or spacer can be promoted, The particles may be further included, or hygroscopic particles may be added to facilitate heat transfer by latent heat.

Examples of the heat transfer particles include high thermal conductive metal particles, SiC, carbon black, carbon nanotubes, or conductive polymers. Examples of the hygroscopic particles include lithium chloride (LiCl), phosphate, calcium carbonate, silica, zeolite, bentonite, Molecular sieves, talc, heavy carbon or cray.

Next, the bonding layer is pre-coated on the spacer, the liner or the spacer and the liner before the cologation process (step S200) before performing the bonding process through the colger to form the wrinkle shape on the spacer.

Here, the bonding layer 110, 210 is mainly performed by applying an adhesive to the entire surface of the spacer or liner. Heat can be applied or pressure can be applied through a roller for supplying a spacer or a liner for supplying a spacer in a collation process to be described later. Therefore, when a material used for the bonding layer is heated, adhesion performance is exhibited, When an adhesive that reacts with heat to thermally bond the spacer and the liner that is hardened is used, or when the pressure is applied, an adhesive that reacts to a pressure capable of pressure bonding the spacer and the liner .

Such bonding can be realized in various forms such as adhesion or adhesion, and is not limited as long as the spacer 200 and the liner 100 can be stably and reliably bonded.

Examples of the material of the bonding layer include polyethylene, polyvinyl butyral, ethylene vinyl acetate, epoxy, polyurethane, synthetic rubber, natural rubber Or a pressure sensitive adhesive may be selected and used. The material of the spacer and the liner is selected in consideration of variables such as pressure and temperature.

Here, the bonding layer may be formed solely on the liner and the spacer, but may be formed on the liner and the spacer at the same time, and is most preferably formed on the spacer. Heat transfer in the heat transfer element is made through the liner, so if the other conditions are the same, the liner should be thin. Thus, it is preferred that the bonding layer, which forms an additional thickness, is formed in the spacer 200 that is not directly related to heat transfer.

On the other hand, unlike the conventional process, the bonding layer is applied to the entire surface of the spacer or liner in the present invention. Therefore, in order to apply the adhesive only to the acid portion of the spacer in the conventional process, it is possible to prevent the production efficiency from being lowered and the process condition to be harder, and thus, the productivity can be remarkably contributed.

Conventionally, an adhesive is applied only to the mountain portion of the corrugation where the liner and the spacer contact each other, and the spacer is adhered in a direction perpendicular to both sides of the liner with the liner therebetween. In this case, a considerable amount of time is dependent on manual operation, so that it takes a long time and it is difficult to expect high productivity and economical efficiency.

In the present invention, an adhesive layer such as EVA may be formed on the entire surface of the liner to eliminate the inconvenience of applying the adhesive by selecting the adhesive precisely only at the portion where the liner and the spacer are in contact with each other.

The method of applying the adhesive to the entire surface of the liner can be implemented by various methods. For example, a liner having an adhesive layer formed by previously applying an adhesive or the like to the surface of the spacer or the liner can be produced. As another example, the cologation bonding process may be continued to the bonding process with the spacer while passing the adhesive to the surface of the liner in a container containing the adhesive beforehand.

At this time, the coating thickness is preferably about 3 to 10 mu m. When the coating thickness is less than 3 mu m, smooth and reliable bonding becomes difficult in consideration of the physical properties of a bonding layer to be described later. When the thickness exceeds 10 mu m, the flow path becomes narrow to cause a resistance unnecessary for air flow, May occur.

Here, the bonding layer may be provided with heat transfer means or moisture absorption means to improve the sensible heat transfer efficiency through the liner. In the case where the heat transfer means is a high thermal conductive metal particle, SiC, carbon black, a carbon nanotube, or a conductive polymer, and the heat transfer means is charged into the bonding layer in a particulate form, It is preferable that the heat transfer particles have a particle diameter of 150 mu m. If the particle diameter is less than 0.1 mu m, the particles are not uniformly coated over the entire bonding layer because of the phenomenon of aggregation of the particles. When the particle diameter exceeds 150 mu m, the particles protrude from the bonding layer to increase the friction of the flow path, Problems can arise.

On the other hand, in order to improve the overall heat transfer efficiency including the latent heat due to the phase change of water, the bonding layer may further include a moisture absorption means. The moisture absorbing means may be selected from lithium chloride (LiCl), phosphate, calcium carbonate, silica, zeolite, bentonite, molecular sieve, talc, heavy carbon or cray.

Next, a method of manufacturing a heat transfer element according to an embodiment of the present invention includes a step of pressing the spacer having the bonding layer formed thereon through a cologation process and bonding the spacer to the liner (step S300).

When the bonding layer is a thermally bonded layer capable of thermally bonding the spacer and the liner by applying heat, it is preferable that the thermal bonding is performed by applying a temperature of 50 to 250 ° C to the colgator or the roller. The PE or PET generally used in the liner or the spacer is not thermally deformed and only the bonding layer should be melted and flowed so as to have the adhesive property. Therefore, the material used for the liner or spacer and the bonding layer To adjust the temperature range.

Further, the bonding layer may be a pressure bonding layer capable of pressure bonding the spacer and the liner under pressure. In this case, the pressure bonding is performed by applying a pressure of 2 to 25 atm. If the pressure is less than 2 atmospheres, stable bonding is difficult. If the pressure exceeds 25 atm, the spacer or the liner may be damaged.

Materials that can be bonded by such heat or pressure include polyethylene, polyvinyl butyral, ethylene vinyl acetate, epoxy, polyurethane, Synthetic rubbers, natural rubbers, and pressure-sensitive adhesives.

In this step of the present invention, since the spacers and the liner in the state in which the bonding layer is already uniformly applied are used, the adjustment of the mounting position of the colgator and the roller becomes less sensitive and the bonding layer component flows from the mountain portion to the other portion And viscosity control to prevent problems such as the problem is not a big problem.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that it is possible.

13: heat transfer element 21: exhaust layer
22: supply layer 23: spacer
24: liner 30: pressure roller
40: upper cologator 42: lower cologator
44: Adhesive coating drum 100: Liner
110: liner bonding layer 200: spacer
210: spacer bonding layer

Claims (12)

A method of manufacturing a heat transfer element by bonding a wavy spiral spacer forming a flow path to a liner,
Preparing a liner and a spacer forming the flow path;
Applying a pressure to the spacer, the liner or the spacer and the liner to precoat the pressure bonding layer capable of pressure bonding the spacer and the liner; And
And pressing the spacers formed with the pressure bonding layer through a cologation process and bonding the spacers to the liner. The method according to claim 1, wherein the liner and the spacer are each formed of paper, metal, urethane, nylon, polyester, polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polysulfone (PS), polycarbonate PC), polyimide (PI), or polyvinyl chloride (PVC). The method of claim 1, wherein the pressure bonding layer comprises heat transfer means. 4. The method of claim 3, wherein the heat transfer means is high thermal conductive metal particles, SiC, carbon black, carbon nanotubes, or a conductive polymer. 4. The method of claim 3, wherein the heat transfer means comprises heat transfer particles having a particle size of 0.1 to 150 mu m. The method of claim 1, wherein the pressure bonding layer comprises a moisture absorption means. The heat transfer element according to claim 6, wherein the moisture absorbing means is lithium chloride (LiCl), phosphate, calcium carbonate, silica, zeolite, bentonite, molecular sieve, talc, Production method. delete delete delete The method of claim 1, wherein the pressure bonding is performed by applying a pressure of 2 to 25 atm. The method according to claim 1, wherein the bonding layer is selected from the group consisting of polyethylene, polyvinyl butyral, ethylene vinyl acetate, epoxy, polyurethane, Wherein the pretreatment is performed using a precoating pretreatment method.

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