JPH0450184B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a heat insulating member used for, for example, an air conditioner or a folded metal roof plate.

[Prior Art] Generally, in an air conditioner used for cooling or heating, a blower built in the casing sucks and discards outside air and generates cold or warm air from a heat exchanger. In order to efficiently blow air and absorb noise, a heat insulating member that also has a sound absorbing effect is attached with an adhesive to the inner wall surface of the casing corresponding to the area that is cooled or heated by the heat exchanger.

Conventionally, some air conditioners of this type have a structure using a fibrous body made of short fiber glass wool hardened with a large amount of an organic binder such as a phenol resin type as a heat insulating member.
If the fibrous material is simply attached to the inner wall surface of the casing, the insulation material may be damaged due to vibrations caused by shock during transportation, vibrations during operation, or air currents caused by cold or hot air flowing along the surface of the insulation material. This causes the problem that the glass wool fibers that form the fibers are scattered.

Therefore, in order to prevent the scattering of short fiber glass wool, which is the fiber body forming such a heat insulating member, as disclosed in, for example, Japanese Utility Model Publication No. 57-9628, etc., the fiber body in contact with the air flow is A device having a structure in which a coating layer made of a heat-resistant resin is formed on the surface has been proposed.

Furthermore, as a heat insulating member used for metal folded roof panels, etc., as disclosed in JP-A-57-7889, etc., organic fiber non-woven fabric is superimposed on inorganic fiber mat, and the organic fiber non-woven fabric side is Some fabrics have a structure in which the organic fiber nonwoven fabric is bonded to each other by needle punching, and a resin composition is coated on the surface of the organic fiber nonwoven fabric.

[Problems to be solved by the invention] However, with the conventional structure described above,
In both cases, the coating layer is formed only on one side of the fibrous body, so when such insulation members are stacked on top of each other after manufacturing, the fiber material of the upper insulation member will overlap the surface of the coating layer of the lower insulation member. adhere to. In particular, when the fiber body is made of long fiber glass wool, the long glass fiber is manufactured using a continuous processing method, so the finished glass fiber product is wound into a roll for management and storage. However, in this case, even when stored in rolls, the back side of the fiber body overlaps the coating layer on the front side, and the fiber material adheres to the surface of the coating layer, and the coating layer is not organic. For this reason, it is flammable, and if it is used as a heat insulating member for an air conditioner incorporating an electric heater as an auxiliary heat source for heating, there is a risk of it catching fire and burning out.

In addition, as mentioned above, a large amount of binder is required to harden the short fiber glass wool that forms the heat insulating member into a fiber body, so the content of binder in the fiber pair is high, and as a result, the fiber body There is no flexibility in bending the fibers, and if you forcefully bend the fibers, the glass wool will hang up and cracks will occur, and the glass wool and binder will scatter. However, when such a fibrous body is cut into a predetermined size and shape, short fibers of glass wool tend to scatter from the cut surface, resulting in poor workability.

In addition, attempts have been made to apply inorganic paints such as alumina sol and silica gel to long fibers, but these inorganic paints have weak surface adhesion and hard coatings, so they are susceptible to vibrations and other factors. As a result, the coating paint cracked or fell off due to external forces, and as a result, it was not possible to prevent the glass fibers from scattering.

Furthermore, as a coating treatment for inorganic materials, various surface coatings using vermiculite (vermiculite) alone have been investigated, but the vermiculite itself falls or falls off, and it is not possible to prevent glass fibers from scattering. However, it is insufficient due to the lack of cohesion of vermiculite.

Furthermore, in order to prevent the heat insulating material attached to the inside of the casing that constitutes the air conditioner from being seen from the outside through the air vents or intake ports, and to improve its appearance, the surface of the fibrous body is coated with heat-resistant resin. Insulating materials made of metal are usually painted black or other colors using a carbon black-type coloring agent, but because the coating layer is an organic paint, the surface adhesion is weak. During painting work, if you touch the applied colored paint, the colored paint will easily peel off with finger pressure and adhere to the work gloves, etc., resulting in very poor paintability.

Furthermore, even if magnesium oxide is added to the above-mentioned coating paint on the surface of the fiber body in order to make it water resistant against dew condensation that occurs inside the air conditioner, good water resistance cannot be obtained. When condensation occurs on the surface of the insulation member,
There have been various problems, such as causing discoloration, impairing the appearance, and lowering the commercial value.

The present invention was made under the above circumstances, and its purpose is to prevent the adhesion of fiber materials to the coating layer during lamination, and to improve heat resistance, water resistance, and processability. It is an object of the present invention to provide a harmless and safe heat insulating member that reliably prevents burnout during abnormal heating and allows the use of different surface colors depending on the application.

[Means for Solving the Problems] In order to solve the above problems, the present invention includes the following:
Both sides of the fibrous body are coated with a coating material mixed with a flaky inorganic substance.

[Function] That is, the present invention has the above-mentioned structure, so that both sides of the fibrous body are coated with a covering material mixed with a flaky inorganic substance, and the fibrous body is formed of long fiber glass wool. As a result, it becomes a flexible heat insulating material that conforms well to curved surfaces, has good compatibility with the coloring agent used to color black or white, and inorganic paint, and is compatible with the base material. Because of its good adhesion to (fibrous body), it can improve the adhesion workability and paintability, and
It has excellent water resistance and anti-scattering properties of the fiber material, which can reliably prevent burnout during abnormal heating.Also, it has a flaky inorganic substance coated on both the front and back of the fiber body. By coloring the covering material in different colors, black and white, it becomes possible to easily store and manage it.

By the way, the inorganic substance used in the coating paint for the surface of the fiber body as a heat insulating member according to the present invention has an aspect ratio.
Particles consisting of 100 or more flakes, and generally have a flaky particle shape, have cohesion between their cleavage planes, and the cohesive force becomes stronger as the aspect ratio increases. There is a tendency to Good examples include expanded graphite sheets and mica tapes, which are formed into flexible sheets only by the cohesive force between cleavage planes, such as expanded graphite and mica.

Therefore, as a result of conducting various studies on the above-mentioned flaky inorganic materials, the present inventors found that these flakes have cohesive forces not only between cleavage planes but also with fibrous materials such as glass fibers. The present invention has been proposed based on the discovery that the coating material mixed with flaky inorganic material as a coating material that is coated on the surface of the fibrous body forming the heat insulating member is It is made of a mixture of an aqueous dispersion of an inorganic substance, an organic binder, a cationic activator, and aqueous ammonia, and this makes it possible to create a flexible coating that easily penetrates into fiber materials, unlike conventional alumina sol or silica sol. In contrast to paints that require a large amount of paint to cover a certain area, it is now possible to coat a large area with a small amount of paint, and it also reduces penetration into the fiber material. It is something that makes it possible to do.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 and 2 show an example in which the heat insulating member according to the present invention is applied to an integrated air conditioner used for indoor heating and cooling;
This is the main body of the air conditioner installed in. This air conditioner main body 1 consists of a casing 2 in which various devices described below are built-in.
is formed from a top panel 3, left and right side panels 4, a front panel 5, a back panel 6, a bottom plate 7, and a partition plate 8 made of sheet metal. It has a structure in which it is divided into two parts.

The indoor chamber 9 in the casing 2 divided by the partition surface 8 includes a first heat exchanger 11 that functions as an evaporator during cooling and as a condenser during heating, and an electric heater that is energized during heating. 1
2 and a cross flow fan 13 are installed, whereby the indoor air sucked in from the suction grill 51 opened at the lower part of the front panel 5 by the operation of the cross flow fan 13 is passed through the air filter 1.
4 through the first heat exchanger 11 and the electric heater 1
2, the air can be blown into the room from a blow-off grill 52 opened at the top of the front panel 5.

On the other hand, the outdoor chamber 10 inside the casing 2 described above
includes a second heat exchanger 15 that acts as a condenser during cooling and as an evaporator during heating, a propeller fan 16 having a slinger ring 16a on its outer periphery, and a motor 17 that rotationally drives the propeller fan 16. and support legs 18 that support this motor 17 are installed, thereby converting the outdoor air sucked in from the suction grills 61, 61 opened on the left and right sides of the back panel 6 by the operation of the propeller fan 16 into a second heat source. After being sprayed onto the exchanger 15, the air is discharged outdoors through an exhaust grill 62 opened in the center of the back panel 6. Note that 19 in the figure is a compressor.

Furthermore, the partition plate 8 that divides the interior of the casing 2 into an indoor chamber 9 and an outdoor chamber 10 has an upper curved portion 81 that also serves as a scroll portion of the cross flow fan 13, and a lower portion of the partition plate 8 that divides the inside of the casing 2 into an indoor chamber 9 and an outdoor chamber 10.
The second support plate 12a is attached to the inner wall surface 10a on the side of the outdoor room 10, so that it is cooled during cooling and heated during heating.
A heat insulating member 20, which will be described later, is attached using an adhesive or the like, which prevents water droplets from condensing on the wall on the side of the outdoor room 10 during cooling, or water droplets on the wall on the side of the indoor room 9 when heating operation is stopped. It is designed to prevent condensation.

That is, the above-mentioned heat insulating member 20 has a fiber diameter of 6 to 25μ and a fiber length of 30 to
100mm long glass fiber (thermal conductivity: 0.035Kcal/
In order to manufacture such a fiber body 21, long glass fibers cut into a certain length are dispersed and deposited in a dispersion machine, and then Needle in the deposit
It is obtained by punching it into a pine shape. The fiber body 21 manufactured in this way does not break even when folded compared to conventional short fiber mats, and therefore is particularly easy to adhere to curved surfaces etc. It is possible to make it effective. The front and back surfaces 21a and 21b of the fiber body 21 are coated with flaky coating paint for the purpose of preventing the fiber materials on the front and back surfaces of the mat from scattering, improving the appearance, and further improving water resistance. The coating material 2 is coated with coating materials 22 and 23 mixed with an inorganic substance, and each of the coating materials 2 is coated with a flaky inorganic substance.
2 and 23 in different colors, for example, to make it difficult to see from the intake grill 61 and exhaust grill 62 opened in the rear panel 6, or to improve the appearance when the electrical equipment room is opened for maintenance and inspection. It is colored in white or other colors depending on the purpose.

Furthermore, a coating material 2 mixed with a flaky inorganic material is coated on the fiber body 21 as such a coating layer.
Nos. 2 and 23 are formed by applying a mixture of an organic binder, a cationic activator, and aqueous ammonia to an aqueous dispersion of flaky inorganic material.There are various types of flaky inorganic material, but mica Thin flakes of mica, montmorinite, vermiculite, etc. are preferably used, and in particular, Na-tetrasilicate, which is so-called hydration-swellable mica, absorbs water between layers and separates into single flakes. Mica is most preferably used, but although these flaky inorganic materials have strong adhesive strength by themselves, their adhesive strength is insufficient compared to organic paints, and when strong vibrational forces are applied. It is necessary to add an organic binder to an extent that does not impair the nonflammability.
The amount added is 20 parts by weight or less, preferably 10 parts by weight, in view of its nonflammability. In addition, the types of additives include soluble starch, CMC, water-soluble binders such as PVA, vinyl chloride emulsion, acrylic emulsion, NBR latex, etc.
Emulsion-dispersion type binders such as SBR latex are preferably used.

However, on the surface of the heat insulating member 20 made of the long fiber glass wool fiber body 21 coated with the covering materials 22 and 23 mixed with the above-mentioned flaky inorganic substance, the first or second in the air conditioner main body 1 is exposed. Drain water generated in the heat exchangers 11 and 15 may adhere, and this water may enter the flakes or the agglomerated surfaces of the flakes and glass fibers, weakening the bonding force. However, as mentioned above, although this can be significantly improved by adding an organic binder, it is necessary to add 10 parts by weight or less of a cationic activator. Alkylammoniums and alkylamines, which are more hydrophobic and highly water resistant, are effective. The reason for this is that the cleavage planes of these flaky inorganic materials have negatively charged surfaces formed by oxygen atoms, which adsorb polar solvents such as water, and hydrophobic groups are formed on these negatively charged surfaces. The purpose of neutralization is to use a cationic surfactant with a
Isocyanates that react with groups are also effective.

Furthermore, the reason why aqueous ammonia is added to the aqueous dispersion of the flaky inorganic material constituting the coating materials 22 and 23 in which the flaky inorganic material is mixed is that the surface potential of these flaky inorganic materials is negative. This is because when a cationic activator having 6 or more carbon atoms is added, these cationic potential parts combine with the negative potential part of the inorganic substance, making the inorganic substance hydrophobic, which may cause aggregation, sedimentation, etc. ,
In order to prevent sedimentation, etc., ammonia water is added to keep the pH level at alkaline side.
As a result, ammonium ions are scattered as ammonia gas during drying after processing.
Instead, these cationic substances coordinate to the surface of the inorganic substance to form a strong hydrophobic coating.

In addition, the aqueous dispersion of the above-mentioned flaky inorganic material includes
It is possible to add coloring agents to increase added value, but spherical or amorphous pigments tend to discolor, so it is best to use flaky pigments similar to the flaky inorganic materials used. If you use it, there will be no discoloration. Furthermore, for the same reason as the fixing mechanism of cationic activators, cationic dyes are also very effective against discoloration. In addition,
Colorants containing carbon or iron are not recommended as paints for heat insulating materials attached near the electrical parts of air conditioners due to their electrical conductivity.In this case, it is better to select colorants that are non-conductive. good.

Incidentally, the amount of the coating paint as the coating material 22, 23 mixed with the flaky inorganic substance applied to the surface of the fiber body 21 varies depending on the density of the fiber body 21, but the amount of coating paint applied to the surface of the fiber body 21 depends on the dry finish and total solid state. In other words, it is necessary to apply a coating of 10 to 200 g/ ^m2 in a dry state, and the optimum coating amount is 20 to 200 g/m2 in a dry state.
100g/ ^m2 , thickness 3~30mm, density 50~300
Kg/ ^m3 range. In this case, especially the fiber body 2
1 is visible from the outside of the air conditioner body 1, if the amount of coating paint applied is small, the white or yellow base color of the fiber body 21 made of long fiber glass wool will be visible; Not only does the surface colored coating become meaningless, but it also fails to provide a sufficient effect of preventing the fiber material from scattering. On the other hand, if the coating amount of the coating paint is excessively increased, the thickness of the surface coating layer becomes too thick and the surface of the fiber body 21 loses its flexibility, causing problems on complex-shaped surfaces such as the inner wall surface of the casing 2. This not only makes it impossible to apply the adhesive, but also leads to destruction of the surface coating layer, resulting in poor adhesion workability and processability.

Since the above-described heat insulating member 20 exhibits flexibility, it can be used along the curved surface portion such as the upper curved portion 81 of the partition plate 8 that partitions the inside of the casing 2 of the air conditioner main body 1 as described above. Since it can be easily attached and the fibrous body 21 is not cracked during the bending process at this time, it is possible to reliably prevent the fibrous material from scattering outside during air-conditioning operation. In addition, during cooling/heating operation, the drain generated in the first heat exchanger 11 on the indoor side is received by the Styrofoam drain pan 31 placed at the bottom, and then flows from the drain port 32 to the outdoor side room 10 side and flows to the bottom plate 7. Some of the drain water collected in the concave portion 71 of the slinger ring 16a is evaporated by being raked up by the slinger ring 16a and blown to the second heat exchanger 15 on the outdoor side. For example, it may adhere to the coating layer 22 that is coated on the non-adhesive surface 21a side of the fibrous body 21 constituting the heat insulating member 20 and is made of a coating material 22 mixed with a flaky inorganic substance, or when it rains with strong winds. Even if rainwater blows in through the grilles 61 and 62 opened on the back panel 6 on the outdoor side and gets wet, the coating material 22 mixed with the flaky inorganic substance has water resistance and the coating material The coloring agent in No. 22 does not fall off or discolor. Furthermore, even if the temperature of the partition plate 8 rises abnormally due to abnormal heating of the electric heater 12 during heating operation, the flaky inorganic material coated on both surfaces 21a and 21b of the fibrous body 21, which is the heat insulating member 20, is mixed. Covering material 2
Nos. 2 and 23 have heat resistance, so they do not generate odor or burn out.

Further, in the above embodiment, as shown in FIG.
The insulation member 20 according to the present invention is attached to the wall surface of the electrical equipment room 34 in which 3 is housed, in order to prevent frost formation. This prevents the scattering of
This makes it possible to prevent the fiber material from entering the electrical equipment box 35 through the hole 36 opened in the upper surface of the electrical equipment box 35 and causing the electrical components 37 to malfunction. At this time, as the heat insulating member 20, coating materials 22 and 23 mixed with a flaky inorganic material are coated on both the front and back sides 21a and 21b of the fibrous body 21, and the adhesive side is colored black using the above-mentioned coloring agent. , the non-adhesive surface side is colored white, so that when the electrical equipment room 34 is opened for maintenance and inspection, the surface of the heat insulating member 20 appears white, giving it a good appearance and aesthetic appeal. It becomes possible to improve the

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] As is clear from the above description, according to the present invention, since the covering material mixed with flaky inorganic material is applied to the pine-like fibrous body, the flaky inorganic material is The inorganic substance is locked near the surface of the fibrous body, making it difficult for this inorganic substance to penetrate into the gap in the center of the fibrous bodies. As a result, a large area of the heat insulating member can be covered with a small amount of the covering material, and the flexibility of the fibrous body can be maintained.

In addition, since the penetration of the coating material into the gaps between the fiber bodies is reduced, it is possible to improve the workability and paintability of attaching the heat insulating member to the inner wall surface of a casing having a complicated curved surface, such as an air conditioner. It is possible to prevent fibers from scattering and cracks in the insulation material.

Moreover, since the coating material mixed with flaky inorganic material is applied to both the front and back sides of the pine-like fiber body, even if the heat insulating member made of this fiber body is rolled and stored, the heat insulating member Since the covering material is located on both the front and back sides, there is no fear that the fibrous bodies in the heat insulating member will become entangled with each other or that the fibrous bodies will adhere to the covering material, and the handleability of the heat insulating member can be improved.

Furthermore, if the fibers in the heat insulating member are made of long fiber glass wool, there is less risk of the fibers breaking even if the heat insulating member is bent, and it can be attached to steeply curved surfaces.

Furthermore, by changing the colors of the front and back sides of the fiber body (for example, black and white), if the front and back sides of the heat insulating member are determined by color, storage and management of the heat insulating member, and the attachment surface of the casing, etc. can be easily identified.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway external perspective view showing an embodiment of an air conditioner using a heat insulating member according to the present invention, and FIG.
The figure is also an enlarged longitudinal sectional view of the main part, and FIG. 3 is a partially enlarged sectional view of the heat insulating member. 20... Heat insulation member, 21... Fibrous body, 21a,
21b...Front and back surfaces, 22, 23...Coating material mixed with flaky inorganic material.

Claims (1)

[Scope of Claims] 1. A heat insulating member composed of a pine-like fibrous body on which fibers are deposited and a covering material disposed on both the front and back surfaces of the fibrous body, wherein the covering material has a flexible material of the fibrous body. A heat insulating member characterized by containing a flaky inorganic substance capable of retaining properties. 2. The heat insulating member according to claim 1, wherein the fibrous body is made of long fiber glass wool. 3. The heat insulating member according to claim 1 or 2, wherein the inorganic coating material coated on one side and the other side of the fibrous body is colored in different colors. . 4. The heat insulating member according to claim 3, wherein the inorganic coating material coated on one surface and the other surface of the fibrous body is colored in different colors, black and white.