JP2015021670A - Latent heat exchange element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a latent heat exchange element capable of making best use of absorbing/releasing properties, dispensing with size change, and facilitating attachment/detachment in an apparatus because of provision of a casing.SOLUTION: Provided is a latent heat exchange element configured so that a flat sheet 2 and a corrugated sheet 3 each formed out of a sheet material exhibiting absorbing/releasing properties are fitted into a frame-shaped casing 1 to constitute a layered structure, a surface of the corrugated sheet 3 on which a corrugated shape is visible is arranged on an opening surface of the casing 1, at least portions 5 out of contact portions between the sheets 2 and 3 in the layered structure are not adhesively bonded to each other, and at least portions 4 out of the contact portions in the layered structure are adhesively bonded to each other.

Description

The present invention relates to a material excellent in moisture absorption / release properties. More specifically, air such as dehumidifying and dehumidifying elements for commercial air conditioners, home air conditioners or automobile air conditioners, dehumidifying materials such as closets, closets and shoeboxes, and anti-condensation materials such as freezer car carriers, refrigerators and refrigerators. The present invention relates to a latent heat exchange element used for exchanging latent heat (moisture) between each other.

Main components of the hygroscopic element are a hygroscopic element comprising a base material coated with a resin in which a water-absorbing polymer is dispersed in a foamable resin (see Patent Document 1), or a highly hygroscopic polymer compound having a salt-type carboxyl group. A low temperature regenerative moisture absorption element (see Patent Document 2) is known. In addition, these documents disclose a pleated shape or a honeycomb structure as the shape of the hygroscopic element.

However, a hygroscopic element composed of a water-absorbing polymer or a high moisture-absorbing / releasing polymer compound has a problem that a dimensional change accompanying moisture absorption / release is large. In this regard, in Patent Document 1, in order to reduce the dimensional change, corrugated moisture absorption elements obtained by adhering a flat substrate and a corrugated substrate coated with a resin in which a water-absorbing polymer is dispersed to each other with an adhesive are used. Lamination bonding is disclosed. In such a method, although the dimensional stability is improved, the moisture absorbing / releasing material is covered with the adhesive, and therefore it is expected that the original performance of the moisture absorbing / releasing material cannot be sufficiently exhibited. For example, in a general corrugated laminated structure called B flute, there are about 50 core peaks in a length of 30 cm, and 16.7% of the substrate on the liner side if the adhesive is applied with a width of 1 mm. In addition, 11.8% of the base material on the core side is covered with the adhesive. Moreover, since the binder is used in Patent Document 2 in order to obtain a structure having a gas penetration path, it is expected that the moisture absorption and desorption performance cannot be sufficiently exhibited.

On the other hand, it is conceivable to construct a latent heat exchange element using silica gel or zeolite, which has little dimensional change due to moisture absorption and desorption. However, since high temperature is required for moisture desorption, the energy-saving performance is low, and the adsorbed odor component is all at once when dehumidifying. Since it is detached, it is regarded as a problem in commercial air conditioners, home air conditioners, and automotive air conditioners.

JP-A-8-281077 JP-A-9-103635

The present invention has been made to solve the above-described problems. The moisture absorption / release performance is utilized to the maximum, there is no dimensional change, and since the casing is provided, it is easy to attach and detach with the apparatus. An object of the present invention is to provide a latent heat exchange element.

As a result of intensive studies in order to solve the above problems, the present inventor constituted a moisture absorbing / releasing element by a casing, a moisture absorbing / releasing flat sheet, and a corrugated sheet, and by adhering only a part thereof. The inventors have found that the dimensional change can be eliminated, the performance of the moisture absorbing / releasing material can be exhibited more efficiently, and the durability can be improved, and the present invention has been achieved. That is, the object of the present invention is achieved by the following means.

(1) In a casing having a frame shape, a planar sheet and a corrugated sheet made of a sheet-like material having moisture absorption / release properties are fitted so as to have a laminated structure, and the corrugated sheet has a visible wave shape Is a latent heat exchange element arranged on the opening surface of the casing, and at least a part of the contact portion between the sheets is not bonded in the laminated structure, and the contact portion of the casing and the laminated structure A latent heat exchange element that is at least partially bonded.
(2) The latent heat exchange element according to (1), wherein the laminated structure is formed by laminating single-sided cardboard made of the flat sheet and the corrugated sheet.
(3) The latent heat exchange element according to (1), wherein the laminated structure is formed by laminating a double-sided cardboard made of the flat sheet and the corrugated sheet.
(4) The hygroscopic sheet-like material contains a hygroscopic polymer compound and absorbs 10 g or more of water per square meter in an environment of 20 ° C. and a relative humidity of 65%. The latent heat exchange element according to any one of (1) to (3).
(5) The latent heat exchange element according to any one of (1) to (4), wherein the sheet-like material having moisture absorption / release properties has a thickness of 0.5 mm or less.

The latent heat exchanging element of the present invention is one in which the amount of use is reduced by efficiently using an adhesive at a key point. For this reason, the moisture absorption / release performance is utilized to the maximum, and the deterioration of the performance due to the air leakage accompanying the dimensional change accompanying moisture absorption / release is prevented and the element is prevented from being deformed.

It is an example of the latent heat exchange element of this invention. It is an example of the latent heat exchange element of this invention. It is an example of the latent heat exchange element of this invention. It is an example of the latent heat exchange element of this invention. It is an example of the latent heat exchange element of this invention. It is an example of the latent heat exchange element of this invention. It is an example of the latent heat exchange element of this invention.

Hereinafter, the latent heat exchange element of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the heat exchange element of the present invention has a structure in which a flat sheet 2 and a corrugated sheet 3 made of a sheet-like material having moisture absorption / release properties are laminated in a casing 1 having a frame shape. It is.

As the shape of the casing having a frame shape, not only a polygonal shape, a circular shape, and an elliptical shape, but also an arbitrary shape according to the apparatus to which the latent heat exchange element is attached can be adopted. Moreover, as a material of the casing, various materials such as plastic, metal, and wood can be appropriately selected according to the temperature and humidity of the air to be processed, the wind speed, and the like.

The moisture-absorbing and releasing sheet-like material constituting the latent heat exchange element of the present invention is not particularly limited as long as it has moisture-absorbing / releasing properties. Examples thereof include a sheet containing an agent inside. Examples of the moisture absorbing / releasing agent include an inorganic moisture absorbing / releasing agent such as zeolite and silica gel, a water absorbing polymer, and a moisture absorbing / releasing property as disclosed in JP 2001-011320 A and JP 8-225610 A. A high molecular compound etc. can be mentioned. Moreover, as a kind of sheet | seat, fibrous sheets, such as a metal plate which consists of metals with high heat conductivity, such as aluminum and copper, a resin sheet, paper, and a nonwoven fabric can be mentioned.

Examples of the mode of incorporating the moisture absorbing / releasing agent into the sheet include those in which the moisture absorbing / releasing agent is fixed to the surface of the sheet with a binder, those in which the moisture absorbing / releasing agent is mixed with the resin raw material and formed into a sheet, Can be mentioned that is inserted into the paper. In the case of a dispersive liquid or solution-like moisture absorbent / release agent, a mixed solution of the moisture absorbent / release agent and a binder, a mode of applying on a sheet, a mode of impregnating paper or nonwoven fabric, and the like are also possible. Moreover, if it is a fibrous moisture absorbing / releasing agent, the aspect which makes moisture absorbing / releasing agent itself the constituent fiber of paper or a nonwoven fabric is also possible.

Examples of the time when the moisture absorbing / releasing agent is contained in the sheet include before or after processing into the shape of a flat sheet or corrugated sheet, after processing a single-sided cardboard or double-sided cardboard described later, or after laminating in a casing. It is done. Which one is selected can be determined in consideration of the processability of a sheet-like material having moisture absorption / release properties, the processability of attaching a moisture absorbent / release agent, and the like.

The hygroscopic performance of the sheet-like material having hygroscopic properties is preferably that absorbs 10 g or more of water per square meter in an environment of 20 ° C. and 65% relative humidity, and more than 20 g. Is more preferable. However, if the amount of water absorption is too high, it will be like a so-called water-absorbing polymer, and drying will be slow. Therefore, the moisture absorption is preferably 150 g or less per square meter. From the viewpoint of obtaining such moisture absorption performance, a polymer compound having moisture absorption / release properties as disclosed in the above-mentioned JP-A-2001-011320 and JP-A-8-225610 is employed as the moisture-absorbing / releasing agent. It is desirable.

In addition, the thickness of the sheet-like material having moisture absorption / release properties is preferably 0.5 mm or less, more preferably 0.2 mm or less, from the viewpoint of processing into a wave shape or pressure loss when an element is configured. It is. On the other hand, when the thickness is too thin, it becomes difficult to process into a wave shape or the like.

In the present invention, the sheet-like material having moisture absorbing / releasing properties has the shape of the flat sheet 2 and the corrugated sheet 3 and is fitted into the casing so as to have a laminated structure. Here, since it is necessary for air to pass through the latent heat exchange element, the surface of the corrugated sheet 3 in which the corrugated shape is visible is arranged on the opening surface of the casing as shown in FIG.

As a method of laminating, in addition to a method of laminating a flat sheet and a corrugated sheet one by one in order, it is also possible to adopt a method of laminating a flat sheet and a corrugated sheet after previously processing one side cardboard or double side cardboard. it can. As for the type of single-sided cardboard and / or double-sided cardboard, a sheet with a moisture absorption / release property can be used more when the number of flutes is larger, but the temperature / humidity of the air to be processed, the amount of air, Select appropriately considering pressure loss and the like. Specifically, B, E, F, and G flutes can be exemplified.

In the present invention, as shown in FIG. 1, at least a part of the contact portion between the sheets is not bonded in the laminated structure composed of the flat sheet 2 and the corrugated sheet 3, and the casing 1 and the laminated structure At least a part of the contact portion is bonded (the shaded portion indicated by reference numeral 4 is the bonded portion. In each drawing, it is originally visible on the drawings for easy understanding. (There are also parts that are not shown in the figure, and the parts that are bonded by single-sided cardboard processing or double-sided cardboard processing are not shown in a shaded manner.) Specifically, the area of the portion covered with the adhesive in each sheet is desirably less than 10%. By making such a state, while integrating the casing and each sheet, it is possible to reduce the portion that is covered with the adhesive and cannot express the moisture absorption / release performance, so that the latent heat exchange element having more excellent moisture absorption / release performance can do. For example, in a case called B flute, which is a size of a general honeycomb structure, when all the contact portions between sheets are bonded, there are about 50 core peaks in a length of 30 cm, and a width of 1 mm. In the present invention, the area of 16.7% for the flat sheet and 11.8% for the corrugated sheet is covered with the adhesive. In this way, there are a large number of unbonded portions even at the contact portion between the sheets, and the moisture absorption / release performance can be expressed even at such a position (in addition, at the location indicated by reference numeral 5, it is in contact with the adjacent sheet. However, this is an expression for facilitating understanding that it is not bonded to an adjacent sheet). Furthermore, by adopting such a configuration, there are few portions restrained in each sheet, and the stress of expansion and contraction of the hygroscopic agent accompanying moisture absorption / release can be relieved, so that the durability is also excellent. be able to.

As the adhesive that can be employed in the present invention, it is desirable that it has excellent adhesion between both the sheet-like material having moisture absorption and release and the casing, such as a silicone caulking agent, an epoxy resin, and a vinyl acetate resin. , Acrylic adhesives, polyvinyl pyrrolidone, poval, starch paste and the like.

As a procedure to integrate the casing, the flat sheet and the corrugated sheet, a method of manufacturing the casing, filling the laminated flat sheet and corrugated sheet therein, and fixing with an adhesive, or laminating the flat sheet and corrugated sheet In addition, there is a method of assembling a casing in which an adhesive is applied to the inner wall surface, but there is no particular limitation.

The embodiment of the latent heat exchange element of the present invention is not limited to that shown in FIG. FIG. 2 shows another embodiment of the present invention. In such an embodiment, a quadrangular prism-shaped casing is attached in which the laminated single-sided corrugated cardboard is attached to the ends of the single-sided corrugated cardboard on the inner wall surface. By doing in this way, the bonded part is limited to the end face of the single-sided cardboard, and since it hardly covers the part that expresses moisture absorption / release performance, it is possible to prevent the moisture absorption / release performance from being lowered by the adhesive Is obtained.

In the embodiment of FIG. 3, single-sided corrugated cardboard is laminated and a quadrangular prism-shaped casing is assembled, and then an adhesive is attached to only one place on each of the front and back sides. This form is useful when the lateral width of the casing is small, and provides the effect of suppressing the decrease in moisture absorption / release performance due to the adhesive and the advantage of being inexpensively manufactured. In addition, in the case where the casing has a large width and fixing is not sufficient by bonding only one end of a single-sided cardboard as shown in FIGS. 1 and 2, in addition to bonding both ends, a central portion as shown in FIG. Adhering can also provide an advantage that the form of the latent heat exchange element can be stabilized.

In the embodiment of FIG. 4, double-sided corrugated cardboard is laminated and a quadrangular prism-shaped casing is assembled, and then the adhesive is attached only to one surface. By doing in this way, the effect which suppresses the fall of the moisture absorption / release performance by an adhesive agent, and the advantage which can be manufactured cheaply are acquired.

In the embodiment of FIG. 5, single-sided cardboard is laminated and assembled to a cylindrical casing, and then an adhesive is applied along the outer periphery of the front and back. By doing in this way, the advantage that it is easy to mount | wear with the latent heat exchange element of this invention in a duct shape is acquired. Further, as a method of laminating single-sided cardboard, it may be formed by winding single-sided cardboard into a cylindrical shape.

Further, in the embodiment of FIG. 6, a cylindrical casing in which an adhesive is attached to a portion where the laminated single-sided cardboard hits the outer periphery of the single-sided cardboard on the inner wall surface is assembled. By doing in this way, the bonded part is limited to the end face of the single-sided cardboard, and since it hardly covers the part that expresses moisture absorption / release performance, it is possible to prevent the moisture absorption / release performance from being lowered by the adhesive. In addition, the advantage of being easy to install in the duct shape is obtained.

In the embodiment of FIG. 7, the single-sided cardboard is laminated and assembled to the cylindrical casing, and then the adhesive is applied along the diameter of the casing. By doing in this way, the advantage that it is easy to mount in a duct shape and can be manufactured at low cost is obtained.

The latent heat exchange element of the present invention is, for example, a dehumidifying / humidifying element for a commercial air conditioner, a home air conditioner or an automobile air conditioner, a dehumidifying material such as a close-in, closet or shoe box, a dew condensation preventing agent for a freezer car bed, a refrigerator, a refrigerator By using a polymer compound having moisture absorption / release properties, it can be regenerated at exhaust heat or at a low temperature, and has an excellent effect of preventing odor accumulation.

1: Casing 2: Plane sheet 3: Corrugated sheet 4: Bonded portion 5: Laminated portion not bonded

Claims (5)

In the casing having a frame shape, a planar sheet and a corrugated sheet made of a sheet material having moisture absorption / release properties are fitted so as to have a laminated structure, and the surface of the corrugated sheet where the corrugated surface is visible is the casing. Latent heat exchange elements arranged on the opening surface of the sheet, wherein at least a part of the contact part between the sheets is not bonded in the laminated structure, and at least a part of the contact part of the casing and the laminated structure A latent heat exchange element to which is adhered. 2. The latent heat exchange element according to claim 1, wherein the laminated structure is formed by laminating a single-sided cardboard made of the flat sheet and the corrugated sheet. 2. The latent heat exchange element according to claim 1, wherein the laminated structure is formed by laminating double-sided corrugated cardboard made of the flat sheet and the corrugated sheet. The sheet-like material having moisture absorption / release properties includes a polymer compound having moisture absorption / release properties, and absorbs 10 g or more of water per square meter in an environment of 20 ° C. and a relative humidity of 65%. The latent heat exchange element according to any one of claims 1 to 3. The latent heat exchange element according to any one of claims 1 to 4, wherein the thickness of the sheet-like material having moisture absorption / release properties is 0.5 mm or less.

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