JP2017044453A - Net-like body with leg - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a net-like body for increasing an electric power reduction effect compared to a conventional one.SOLUTION: A net-like body with a leg as a net-like body 1 which is arranged in a movement path of air of a heat exchanger includes: a leg part 14a comprising a plurality of projections on one or both of one surface and the other surface of the net-like body; and ceramics layers at least on the surfaces of the net-like body and the leg part. The net-like body has a shape where a plurality of stripes 11a and 12a cross each other, and the stripe preferably has a core material comprising a synthetic resin material, and a ceramics layer arranged on the front surface side of the core material. With this, it is possible to decrease a mixing amount of ceramics, and reduce electric power consumed for heat exchange of the heat exchanger. The net-like body contains for instance, 0.5 μg or more of ceramics per cmof the net-like body.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a legged net used by being arranged in an air movement path of a heat exchanger.

It is desired to reduce energy consumption of air conditioners, refrigeration facilities, etc. in order to reduce environmental burdens and reduce costs.

For example, in the following Patent Document 1, low-density polyethylene that has been heated and melted and ceramic powder having a predetermined chemical composition are mixed to form pellets, and the pellets are heated and melted and molded into a net using a mold. It is described. It is said that if this air conditioning net is arranged at the inlet of each of the indoor unit and outdoor unit of the air conditioner, power consumption is reduced.

JP 2014-224621 A

In the mesh body of Patent Document 1, it is said that the power reduction effect is about 45%, and it is desired to increase the power reduction effect.

It is an object of the present invention to provide a net-like body that has an improved effect of reducing the amount of power, gas for fuel, etc. used than before.

A net-like body disposed in the air movement path of the heat exchanger, the net-like body comprising a plurality of protrusions on one or both of one side and the other side of the net-like body. The body and the foot part solve the above-described problems by a legged mesh body having a ceramic layer on at least the surface thereof. The present inventors have found that there is a correlation between the amount of radiation of far-infrared rays and the reduction of the amount of energy consumed, and succeeded in enhancing the power reduction effect as compared with the conventional art.

The net-like body has a shape in which a plurality of filaments intersect, and the filaments preferably have a core material composed of a synthetic resin material and a ceramic layer disposed on the surface side of the core material. Thereby, it becomes possible to reduce the compounding quantity of ceramics and to reduce the electric power consumed for heat exchange of the heat exchanger. The net-like body is, for example, one containing 0.5 μg or more of ceramics per 1 cm ² of the net-like body.

The core material is preferably composed of a soft synthetic resin material. Thereby, a mesh body can be deform | transformed and fixed according to the shape of the inlet port or exhaust port of a heat exchanger.

The filament is a shape in which a plurality of first filaments arranged along the direction in which the air moves and a plurality of second filaments arranged in a direction intersecting the first direction intersect, Is preferably continuous along the extending direction of either the first filament or the second filament. Thereby, since air can be flowed in or out along a 1st filament or a 2nd filament, the flow of air can be made hard to be prevented.

By providing the foot portion, it is possible to increase the surface area of the reticulate body without designing the reed filaments to be particularly thick. For this reason, it is possible to freely set the mesh openings. For example, the mesh body preferably has an opening of 30% to 80%.

A higher protrusion height of the foot is preferable because the surface area increases. For example, it is preferable that the protrusion height of the foot is 0.8 to 3.0 mm.

Since the mesh body and the foot are provided with a ceramic layer on the surface thereof, the ceramics are concentrated on the surface of the mesh body. For this reason, the amount of far-infrared radiation can be increased even with a small amount of ceramics added. Further, since the mesh body has a foot portion, the surface area of the mesh body can be increased to increase the amount of far infrared radiation. By increasing the far-infrared radiation amount, it is possible to increase the efficiency of heat exchange in the heat exchanger and reduce the energy consumption required for heat exchange.

It is a top view of one embodiment of a net-like body. It is sectional drawing of the AA part of FIG. It is sectional drawing equivalent to FIG. 2 of the mesh body of another embodiment. It is a top view of the net body of another embodiment. FIG. 5 is an enlarged view of a portion C in FIG. 4. It is sectional drawing of the BB part of FIG. It is drawing which showed typically the installation location of a net-like body. It is sectional drawing which expanded and showed only the indoor unit of FIG.

An embodiment of a mesh body of the present invention will be described with reference to the drawings.

1 and 2 show an embodiment of the mesh body of the present invention. As shown in FIG. 1, the net-like body 1 of this embodiment has a lattice-like form in a plan view and a bottom view. The net-like body 1 is composed of a plurality of first filaments 11a arranged in parallel to one direction and a plurality of second filaments 12a arranged in a direction intersecting with the filaments 11a. The first filaments 11a and the second filaments 12a are orthogonal to each other, and a plurality of rectangular meshes 13 are formed. As shown in FIG. 2, the mesh body 11 a includes feet 14 a that protrude from the plurality of first filaments 11 a to the plane side. The foot portion 14a continues along the extending direction of the first filament 11a. The width in the short direction of the foot portion 14a is configured to be smaller than the width in the short direction of the first filament 14a. The first filament 11a, the second filament 12b, and the foot 14a are integrally formed. The foot portion 14a may be provided on the second filament 12a instead of the first filament 11a so as to continue along the extending direction of the second filament 12a, or the first filament 11a and the second filament 14a. The leg portions 14a and 14b may be provided on both of the filaments 12a so as to be continuous along the extending direction of the first filaments 11a and the extending direction of the second filaments 12a.

The mesh body 1 has a structure in which the foot portion 14a protrudes to the plane side. The foot portion 14a may be configured to protrude to the bottom surface side, or may be configured to protrude to both the bottom surface side and the bottom surface side as in the net 2 shown in FIG. The mesh body 2 has the same configuration as the mesh body 1 except that the legs 14a and 14b are provided on both sides. In the case where the feet 14a and 14b protrude on both sides, the protruding height of the feet is the sum of the bottom side height (H2) and the plane side height (H1).

Although the mesh 13 of the mesh body of the present embodiment is a square, it may be a hexagon like the mesh 3 shown in FIGS. In the net 3, the first filaments 11 c are inclined by approximately 120 °, and the second filaments 12 c are inclined by approximately 60 °, and intersect each other at the intersection 15. In this embodiment, the foot 14c is provided on the first wire 11c so as to be continuous in the extending direction of the first wire 11c, but the foot is provided on the second wire 12c to provide the second wire. You may make it continue along the extension direction of 12c, or provide a foot part in both the 1st filament 11c and the 2nd filament 12c, and the extension direction of the 1st filament 11c and the 2nd filament You may make it continue in each of the extending direction of 12c. In another embodiment, the mesh shape may be changed to a polygon such as a pentagon or a circle. 4 to 6, the foot portion 14c is indicated by a bold line for the convenience of drawing.

As shown in FIGS. 2, 3, and 6, the nets 1, 2, and 3 described above are arranged on the core materials 16 a, 16 b, and 16 c made of synthetic resin material and on the surface side of the core material. Ceramic layers 17a, 17b, and 17c. The ceramic layers 17a, 17b, and 17c are, for example, dispersed ceramic powder in an arbitrary paint and adhered to the cores 16a, 16b, and 16c made of a synthetic resin material. Examples of the adhesion method include immersion in a solvent containing ceramics, application with a brush or a roller, or spraying with an air brush or spray. Since spraying reduces the yield, it is preferable to twist the coating or dipping. The core members 16a, 16b, and 17c were integrally formed with the foot, the first filament, and the second filament by injection molding.

As the paint, both water-based paint and oil-based paint can be used. When using a net-like body for an indoor unit of an air conditioner or a refrigerator for a food display shelf, it is preferable to use a water-based paint that generates less VOC. Examples of the coating film forming component include an acrylic resin, a urethane resin, and a melamine resin. Urethane resin undergoes hydrolysis over time. Melamine resin may leave formaldehyde used in the process of synthesis. An acrylic resin can be suitably employed as a coating film forming component in terms of weather resistance and safety.

Far-infrared rays are almost absorbed at a depth of about 200 μm from the surface of the material and change into heat. For this reason, if ceramics is kneaded into a synthetic resin material, the effect of reducing energy consumption per unit addition amount becomes small. In the above nets 1, 2, and 3, the ceramic layers 17a, 17b, and 17c are formed on the surface of the net by dipping, coating, spraying, or the like, so that the effect of reducing energy consumption per unit addition amount is increased. I have to. For example, it is preferable to contain 0.5 μg or more of ceramics per 1 cm ^{2 of} the mesh. Since far-infrared transmission power is limited, even if a large amount of ceramics is contained, the effect of reducing the energy consumption will reach its peak. The upper limit of the amount of ceramic added is preferably 50 μg or less per 1 cm ² , and more preferably 20 μg or less.

The ceramic layers 17a, 17b, and 17c may be blended with a warm color pigment such as ivory, a cold color pigment such as blue, and a dark color pigment such as black. As the temperature of the object increases, the amount of far-infrared radiation increases. Therefore, it is preferable to mix dark pigments such as black pigments in the ceramic layers 17a, 17b, and 17c. When the black pigment is exposed to sunlight or the like, the temperature of the ceramic layers 17a, 17b, and 17c increases. This can increase the amount of far-infrared radiation. Furthermore, the ceramic layers 17a, 17b, and 17c cover the core materials 16a, 16b, and 16c so that ultraviolet rays do not directly hit the core material. Thereby, it is possible to prevent the mesh body from being deteriorated. In the case of a network formed by kneading ceramics into a synthetic resin material, it deteriorates in about 3 to 4 years and needs to be replaced. In the configuration in which the ceramic layer is provided on the core material, the service life can be extended to 8 years or more.

It is preferable to use ceramics having a high far-infrared emissivity. For example, it is preferable to use one having an integrated emissivity of 80% to 99% in a wavelength range of 4.5 μm to 20.0 μm, and more preferably 85% to 99%. The integral emissivity is a wavelength of 4 using a Fourier transform infrared spectrophotometer (FT-IR) manufactured by JEOL and an infrared radiation unit (IR-IRR200) manufactured by JEOL, using MCT as a detector. The emissivity is measured with a resolution of 16 cm ⁻¹ in the range of 5 μm to 20.0 μm, and the integrated emissivity is obtained by integrating the emissivity in the wavelength range of 4.5 μm to 20.0 μm. The measurement temperature is 40 ° C., and the measurement temperature is the surface temperature of the sample measured using a T thermocouple.

The core materials 16a, 16b, and 16c constituting the above-mentioned network are made of an ethylene vinyl acetate copolymer (EVA) that is a soft synthetic resin material. EVA has the flexibility due to the vinyl acetate unit. You may comprise a core material with another elastomer. By configuring the mesh body with the soft synthetic resin material, the mesh body can be curved and set so as to follow the shape of the vent hole. For example, as shown in FIGS. 7 and 8, when a mesh body is used for an indoor unit of an air conditioner, the mesh body 16 can be easily bent and fixed along the curved portion 18 of the indoor unit 19. it can.

If the mesh body is made elastic, the mesh body can be wound into a roll to form a wound product, which can be easily transported to the construction site for use. For example, it is easy to cut out the mesh body from the wound material so as to match the size of the air inlet of the air conditioner indoor unit or outdoor unit, and to install the entire air inlet.

As schematically shown in FIGS. 6 and 7, the indoor unit 19 includes a fan 20, a heat exchanger 21, and a dust filter 22. In the example of FIGS. 6 and 7, the mesh bodies 1, 2, or 3 are sandwiched and fixed between the cover 23 and the dust filter 22. Although illustration is omitted, the outdoor unit 24 arranged outdoors also incorporates a heat exchanger and a fan, and further incorporates a compressor (not shown). The outdoor unit and the indoor unit are connected by a pipe 25, and a heat exchange medium circulates inside the pipe 25. The indoor unit 19 is fixed at an arbitrary position in the room 30.

The blackened portion of the cover 23 is an intake port 26. As shown by arrows D or E in FIGS. 1, 4, 7, and 8, in this air conditioner, the surface of the mesh body is Air flows in parallel. An arrow D shown in FIG. 1 and an arrow E shown in FIG. 5 indicate directions that coincide with the arrow D or the arrow E in FIG. At this time, it is preferable to arrange the mesh body so that the plurality of legs 14a or 14c are along the air inflow direction because the mesh bodies 1, 2, and 3 do not inhibit the inflow of air. For example, in the case of the mesh bodies 1 and 2, the mesh bodies are arranged so that the first filaments having the foot portions are parallel to the air inflow direction. In the above example, a mesh body is also arranged at the intake port 28 of the outdoor unit, and no mesh body is arranged at the exhaust port 27 of the indoor unit and the exhaust port 29 of the outdoor unit 24.

In order to increase the amount of far-infrared radiation, it is assumed that the core of the mesh body is thickened to increase the surface area of the mesh body. However, if the core is made thicker, the mesh opening becomes smaller, and accordingly, the air flow rate through the mesh body becomes smaller, and a sufficient amount of air may not be supplied to the heat exchanger. In the net-like body of the present embodiment, the amount of far infrared radiation is increased by providing the foot portion, so that the mesh opening can be freely set. The opening is preferably set in the range of 30% to 80%, and more preferably 38% to 58%.

A higher protrusion height of the foot is preferable because the surface area increases. On the other hand, there is a limit to the space at the intake or exhaust port of an air conditioner or refrigeration equipment. Therefore, it is preferable to set the protruding height of the foot within a range of 0.8 mm or more and 3.0 mm or less. The upper limit is more preferably 2.0 mm in consideration of workability.

Hereinafter, the present invention will be described more specifically with reference to examples.

[Example 1]
EVA resin was injection-molded to produce a lattice-like net having the mesh described in the column of Example 1 in Table 1 and having the same shape as FIG. The foot height (H1) is 1.5 mm, and the cross sections on the first and second lines are substantially circular with a diameter of about 2 mm.

A ceramic paint was obtained by adding and mixing 20 g of ceramic powder to 100 g of an aqueous acrylic paint obtained by diluting a ceramic powder having a particle size of 25 to 53 μm and a commercially available black aqueous acrylic paint to 90% by volume with water. This paint was applied with a brush so that the ceramics per 1 cm ^{2 of} the mesh was 2 μg and dried to obtain a mesh having a ceramic layer on the surface side of the core. The above-mentioned ceramic powder has an integrated emissivity of about 95% obtained under the following measurement conditions.
Measuring equipment: Fourier transform infrared spectrophotometer (FT-IR) manufactured by JEOL, Infrared radiation unit (IR-IRR200) manufactured by JEOL
Wavelength range: wavelength 4.5 μm to 20.0 μm
Resolution: 16cm ^-1
Detector: Broadband MCT
Measurement temperature T Sample surface temperature measured using a thermocouple: 40 ° C

As the above ceramic powder, 60% by mass of silica, 30% by mass of alumina, 2.4% by mass of iron oxide, 1.9% by mass of potassium oxide, 1.6% by mass of copper oxide, 1.4% by mass of calcium oxide, oxidation What contained 1.4 mass% sodium, 0.73 mass% titanium oxide, and 0.5 mass% magnesia was used. Chemical composition is determined by X-ray fluorescence analysis. In the production, natural ore was pulverized and water was added thereto to make a paste. The paste was molded into a predetermined shape and sintered for about 10 hours until reaching 1300 ° C., and the sintered body was pulverized and classified by sieving.

[Examples 2 to 4]
Reticulated bodies according to Examples 2 to 4 were produced under the same conditions as in Example 1 except that the mesh opening was changed as described in the corresponding column of Examples 1 to 4 in Table 1.

[Comparative Examples 1 to 3]
The points where the mesh openings are as described in the corresponding columns of Comparative Examples 1 to 3 in Table 1, the point where the feet are not provided, and the EVA resin constituting the mesh body are heated and melted under pressure to be extruded and injection molded. A network was produced under the same conditions as in Example 1 except that the ceramic powder was added to the molten resin and then made into a network. In the following, adding ceramic powder when the synthetic resin is heated and melted under pressure is referred to as kneading.

The air inlet and the outdoor unit of the indoor unit of the air conditioner in which the nets according to Examples 1 to 4 and the nets according to Comparative Examples 1 to 3 manufactured as described above are installed in a room as shown in FIG. The power reduction effect was investigated by installing and fixing each at the air intake. Based on the power consumption when no mesh body was arranged at all, the percentage of power consumption reduced in each example and comparative example was determined. The test was conducted by selecting the period when the use of the air-conditioning equipment increased from December to February and from July to September. The power consumption was added up and averaged for each month. Based on this average value, the reduction rate of power consumption was determined with reference to the time when no mesh was attached. The results are listed in Table 1.

As is clear from the comparison between Example 1 and Comparative Example 1 in Table 1, the comparison between Example 2 and Comparative Example 2, and the comparison between Example 3 and Comparative Example 3, It can be seen that the power reduction effect of about 20 to 35% is improved.

[Examples 5 to 7 and Comparative Example 4]
The content of ceramics and the power reduction effect were investigated. The nets of Examples 5 to 7 were prepared in the same manner as in Example 3 except that the ceramic paint was applied to the net so that the content of ceramic per cm ^{2 of the} net was the value shown in Table 2. . According to Comparative Example 4 in the same manner as in Example 3, except that the ceramic material was kneaded into the core material so that the content of ceramic per cm ^{2 of the} mesh body was 16 μg, and no foot was provided. A mesh was produced. For Examples 5 to 7 and Comparative Example 4, the power reduction effect was confirmed by the same method as described above. The results are shown in Table 2.

As is clear from the comparison between Example 6 and Comparative Example 4 in Table 2, when the ceramic paint is kneaded into the core material, the power reduction effect is smaller than when the ceramic paint is applied to the core material surface. confirmed. In the case of Example 6, ceramics are localized as a layer on the surface of the core material. In Comparative Example 4, the ceramic material is dispersed in the core material. In Example 6, the ceramics are densely localized on the surface of the core material, which is considered to improve the power reduction effect. In other words, it is considered that the surface layer ceramics mainly contributes to the reduction of electric power, and the deep layer ceramics has a small contribution degree. As is clear from the comparison of Examples 5 to 7 in Table 2, when the ceramic content is increased, the power reduction effect is improved, but in Example 7, there is a tendency for the increase in the power reduction effect to become smaller. . This is considered to be because even if the ceramic layer is thickened, the deep ceramic layer does not contribute much to the power reduction.

The above embodiment confirmed the power reduction effect. In an air conditioner (gas engine heat pump air conditioner) in which a compressor is driven by a gas engine, an intake port and an outdoor unit of an indoor unit of a gas engine heat pump type air conditioner in which the mesh body of Example 2 is installed in the test chamber of FIG. The effect of reducing the amount of fuel gas used was investigated by fixing each to the intake port. Based on the consumption of fuel gas when no mesh was arranged, it was confirmed that when the mesh was installed, the fuel gas consumption was reduced by 67%.

21 Exchanger 1 Reticulated body 2 Reticulated body 3 Reticulated body 14a Foot 14b Foot 14c Foot 16a Core 16b Core 16c Core 17a Ceramics layer 17b Ceramics layer 17c Ceramics layer 11a First filament 11c First filament 12a Second line 12c Second line

Claims (7)

A reticulated body arranged in the air movement path of the heat exchanger,
It has a foot portion composed of a plurality of protrusions on one or both of one surface and the other surface of the net-like body,
The net-like body and the foot portion are provided with a ceramic layer on at least the surface thereof. The net is a shape where a plurality of filaments intersect,
The leg network according to claim 1, wherein the filament has a core composed of a synthetic resin material and a ceramic layer disposed on the surface side of the core. The net according to claim 2, wherein the net contains 0.5 μg or more of ceramic per cm ^{2 of the} net. The legged net-like body according to claim 2 or 3, wherein the core material is made of a soft synthetic resin material. The filament is a shape in which a plurality of first filaments arranged along the direction in which the air moves and a plurality of second filaments arranged in a direction intersecting the first direction intersect.
The foot net according to any one of claims 1 to 4, wherein the foot portion is continuous along the extending direction of one of the first filament and the second filament. The mesh with a foot according to any one of claims 1 to 5, wherein the mesh has an opening of 30% to 80%. The foot net-like body according to any one of claims 1 to 6, wherein the projecting height of the foot is 0.8 to 3.0 mm.

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