Dew condensation prevention structure

Abstract

To provide a dew condensation prevention structure capable of preventing dew condensation around an air conditioner with simple constitution.SOLUTION: A dew condensation prevention structure (1) serves to suppress dew condensation caused in a circumference of an air conditioner (40) arranged in the ceiling of an indoor space (10). The dew condensation prevention structure (1) comprises: a ceiling material (20) which has its surface opposed to the indoor space (10), and includes a first region (21) surrounding all the sides of the air conditioner (40) and second region (22) outside the first region (21); a ceiling backing material (24) which supports the ceiling material (20); and a soft heat insulator (30) which is placed over the back side of the first region (21). The heat insulator (30) is pressed and crushed with the ceiling backing material (24) to be fixed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a condensation prevention structure, and more particularly to a condensation prevention structure for preventing condensation from occurring around an air conditioner placed on a ceiling in an indoor space. [Background technology]

[0002] In buildings where ceiling-embedded cassette air conditioners are installed and cooling is performed 24 hours a day, condensation may occur on the back surface of the ceiling material (the ceiling side) and on the walls near the air outlets around the air conditioner, causing mold and stains on the ceiling material and the surface of the walls inside the room. For example, Japanese Patent Application Laid-Open No. 2000-141581 (Patent Document 1) is known as a technology to deal with such problems.

[0003] Patent document 1 discloses an anti-condensation decorative material that can prevent the occurrence of condensation by laminating and integrating an insulating layer onto the back surface (non-decorative surface) of the decorative panel, thereby keeping the surface temperature of the decorative material above the dew point temperature. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2000-141581 A Summary of the Invention [Problem to be solved by the invention]

[0005] In order to prevent condensation using the anti-condensation decorative material of Patent Document 1, it is necessary to change all of the decorative materials in the building to anti-condensation decorative materials, which makes the construction work very complicated.

[0006] One method of preventing mold growth on the interior of a building is to apply anti-mold paint to the interior materials, but the anti-mold performance deteriorates over time, making it difficult to continuously prevent mold growth.

[0007] The present invention has been made to solve the above-mentioned problems, and its object is to provide a condensation prevention structure that has a simple configuration and is capable of preventing the occurrence of condensation around an air conditioner. [Means for solving the problem]

[0008] A condensation prevention structure according to one embodiment of the present invention is a condensation prevention structure for preventing condensation from occurring around an air conditioner placed on the ceiling of an indoor space, and comprises a ceiling material whose surface faces the indoor space and includes a first area surrounding the air conditioner on all four sides and a second area which is an area outside the first area, a ceiling underlayment material that supports the ceiling material, and a soft insulating material that is overlaid on the back side of the first area of ​​the ceiling material, and the insulating material is fixed in place by being crushed by the ceiling underlayment material.

[0009] Preferably, the insulation material is provided across two or more ceiling underlayments.

[0010] Preferably, the ceiling unit further comprises a spacer provided between the ceiling material and the air conditioner for lowering an air outlet of the air conditioner downward.

[0011] Another aspect of the present invention is a condensation prevention structure for preventing condensation from occurring around an air conditioner placed on the ceiling of an indoor space, and includes a ceiling material facing the indoor space and a wind direction material provided around the air conditioner to prevent air blown out from the air conditioner's air outlet from hitting the ceiling.

[0012] Preferably, the airflow direction material is attached to either the ceiling material or the air conditioner.

[0013] A condensation prevention structure according to yet another aspect of the present invention is a condensation prevention structure for preventing condensation from occurring around an air conditioner placed on the ceiling of an indoor space, and includes a ceiling material located between the indoor space and the attic space, and air communication holes provided around the air conditioner to generate an airflow from the attic space toward the indoor space.

[0014] Preferably, the air communication hole is formed in a trim material disposed between the ceiling material and the air conditioner. Effect of the Invention

[0015] According to the condensation prevention structure of the present invention, it is possible to prevent the occurrence of condensation around an air conditioner with a simple configuration. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a cross-sectional view showing a condensation prevention structure according to a first embodiment of the present invention, in which (A) shows the periphery of an air conditioner, and (B) shows an enlarged view of a portion of (A). [Diagram 2] FIG. 2 is a plan view seen from the arrow II side in FIG. [Diagram 3] FIG. 5 is a cross-sectional view showing a dew condensation prevention structure according to a second embodiment of the present invention. [Figure 4] FIG. 11 is a cross-sectional view showing a dew condensation prevention structure according to embodiment 3 of the present invention. [Diagram 5] 5 is a bottom view seen from the arrow V side in FIG. 4. [Figure 6] FIG. 11 is a cross-sectional view showing a dew condensation prevention structure according to a modified example of the third embodiment of the present invention. [Figure 7] FIG. 11 is a cross-sectional view showing a dew condensation prevention structure according to another modified example of the third embodiment of the present invention. [Figure 8] FIG. 11 is a cross-sectional view showing a dew condensation prevention structure according to a fourth embodiment of the present invention. [Figure 9] 9 is a bottom view seen from the arrow IX side in FIG. 8. [Figure 10] FIG. 1 is a cross-sectional view showing a schematic diagram of an indoor space of a building equipped with a typical ceiling-embedded air conditioner. [Figure 11] FIG. 1 is a cross-sectional view showing a schematic diagram of an indoor space of a building equipped with a typical ceiling-embedded air conditioner. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and their description will not be repeated.

[0018] Before describing the condensation prevention structure according to this embodiment, we will first briefly explain, with reference to FIG. 10, condensation that occurs in buildings such as nursing homes, hospitals, and research laboratories where people stay and air conditioning is provided 24 hours a day.

[0019] 10, in a building 100, a ceiling material 120 is supported by wall materials 121, and a ceiling-embedded type air conditioner 140 is provided in the ceiling material 120. In such a building 100, cooling is performed in an indoor space 110 during the summer when the outside air is hot and humid. The cool air blown out from an air outlet 141 of the air conditioner 140 is, for example, below 20° C., and flows along the surface of the ceiling material 120 to reduce the temperature of the ceiling material 120, and contacts the surface of the wall material 121 to reduce the temperature of the wall material 121.

[0020] Therefore, when the attic space 111 and the wall back space 112 become humid, the temperature of the back surface of the ceiling material 120 drops below the dew point, and condensation C1 occurs on the ceiling material 120 on the attic space 111 side. Furthermore, the temperature of the back surface of the wall material 121 drops below the dew point, and condensation C2 occurs on the wall back space 112 side of the wall material 121. Since the air conditioner 140 is in cooling operation 24 hours a day, condensation C1 and C2 frequently occur on the ceiling material 120 and the wall material 121. Therefore, condensation and mold that occurs on the ceiling space 111 side of the ceiling material 120 and the wall back space 112 side of the wall material 121 permeate the indoor space 110 side, and become apparent as stains and discoloration on the indoor space 110 side.

[0021] In order to improve the stains and discoloration that appear on the indoor space 110 side due to such causes, in this embodiment, a heat insulating material is placed on the ceiling material (embodiment 1) and the cold air from the air conditioner's air outlet is prevented from directly hitting the ceiling material (embodiments 2 to 4), thereby suppressing the occurrence of condensation around the air conditioner. Such a condensation prevention structure 1 will be described in detail below.

[0022] <Embodiment 1> A dew condensation prevention structure 1 according to the present embodiment will be described with reference to Figures 1(A), 1(B), and 2. The dew condensation prevention structure 1 is provided around a ceiling-embedded type air conditioner 40, and includes a ceiling material 20, a ceiling underlayment material 23 that supports the ceiling material 20, and a heat insulating material 30 that is disposed on the ceiling material 20.

[0023] The ceiling material 20 is an interior material, and includes, for example, a finishing material and a decorative material. The ceiling material 20 is a surface material, and its front surface (lower surface in FIG. 1) is located on the indoor space 10 side, and its back surface (upper surface in FIG. 1) is located on the attic space 11 side. The ceiling material 20 is attached to the entire ceiling. As shown in FIG. 2 in particular, the ceiling material 20 includes a first region 21 that surrounds the air conditioner 40 on all four sides, and a second region 22 that is an area outside the first region 21. The size of the first region 21 is 0.5 m or more, preferably 2 m or less, and more preferably 1 m or less, from the edge of the air conditioner 40. The second region 22 is all the area other than the first region 21.

[0024] As shown in FIG. 2, the ceiling underlayment 23 includes a plurality of first rod-shaped members 24 extending in a predetermined direction and arranged at intervals from each other, and a plurality of second rod-shaped members 27 arranged at intervals from each other in a direction perpendicular to the first rod-shaped members 24. The first rod-shaped members 24 are so-called joists, and are elongated members formed, for example, in a U-shape (upward U-shape) as shown in FIG. 1(B). The first rod-shaped members 24 are formed of a pair of vertical portions 25 arranged opposite each other, and a horizontal portion 26 connecting the lower ends of the pair of vertical portions 25. The first rod-shaped members 24 may have any cross-sectional shape as long as they are elongated members, and may have, for example, a solid rectangular or circular shape.

[0025] The first rod-shaped member 24 is formed of, for example, a metal material, and is preferably, for example, a light-gauge steel substrate (LGS), etc. In the following description, the first rod-shaped member 24 is simply referred to as a "ceiling substrate".

[0026] The second rod-shaped member 27 is a so-called joist support, and is an elongated member formed, for example, in a horizontal U-shape (inverted U-shape). The second rod-shaped member 27 is formed, for example, from a metal material. Although not shown, the second rod-shaped member 27 is located above the first rod-shaped member 24 and supports the second rod-shaped member 27 from above. In FIG. 1(A), the second rod-shaped member 27 is indicated by a dashed line.

[0027] 1(A), the heat insulating material 30 is superimposed on the back surface side (the ceiling space 11 side) of the first region 21 of the ceiling material 20 and adhered to the ceiling material 20. The heat insulating material 30 is a soft material, such as a polyethylene material, and is a closed-cell foam with a polyethylene resin as a base material, which is impermeable to water and air and has excellent airtightness.

[0028] The thickness of the insulation material 30 is, for example, 2 mm to 10 mm, preferably 3 mm to 5 mm, which is considerably thinner than general insulation materials. If it is 3 mm or more, it is possible to prevent condensation occurring in the attic space 11 from seeping into the indoor space 10. If it is 5 mm or less, it can be crushed when placed below the ceiling base material 24, so no step is created and it does not affect the installation of the ceiling base material 23. The thickness of the insulation material 30 is smaller than the height dimension of the vertical portion 25 of the ceiling base material 24.

[0029] As described above, the insulating material 30 is superimposed on the first region 21 of the ceiling material 20. Therefore, the area of ​​the insulating material 30 is the same as the area of ​​the first region 21, and the length from the edge of the air conditioner 40 is 0.5 m or more, preferably 2 m or less, and more preferably 1 m or less. For ease of understanding, the portion where the insulating material 30 is arranged is shown hatched in FIG. 2.

[0030] The cold air blown out from the air outlet 41 of the air conditioner 40 comes into contact with the ceiling material 20 within 0.5 m from the air conditioner 40. Therefore, by arranging the insulation material 30 in such an area, even if the surface of the ceiling material 20 is cooled, the back surface of the ceiling material 20 is not easily cooled because the insulation material 30 is arranged on the back surface of the ceiling material 20. Therefore, it is possible to suppress condensation from occurring on the back surface of the ceiling material 20 around the air conditioner 40.

[0031] As shown in Fig. 1(B), the insulation material 30 is disposed across multiple ceiling substrates 24. The insulation material 30 is provided continuously between at least two ceiling substrates 24, and its edges are crushed by the ceiling substrates 24. Note that it is desirable for the edges of the insulation material 30 to be crushed and fixed by the ceiling substrates 24, and it is sufficient that at least one portion of the insulation material 30 is fixed. Also, the crushed portions of the insulation material 30 have a higher density than the other portions that are not crushed.

[0032] Specifically, the portion of the insulation material 30 located below the ceiling substrate 24 abuts against the horizontal portion 26, and the portion located to the side of the ceiling substrate 24 is located between the vertical portions 25 of the two ceiling substrates 24 that are spaced apart. This forms an area A surrounded by the vertical portions 25 of the ceiling substrate 24 and the insulation material 30.

[0033] In the condensation prevention structure 1 of this embodiment, the heat insulating material 30 is disposed in the first region 21 surrounding the air conditioner 40 on all four sides, so that condensation occurring around the air conditioner 40 can be suppressed. Furthermore, since the heat insulating material 30 is provided across two or more ceiling underlayments 24 and is fixed by being pressed by the ceiling underlayment 24, even if condensation occurs on the heat insulating material 30 side, the region A surrounded by the two ceiling underlayments 24 and the heat insulating material 30 serves as a water receiver, so that the condensed water W can be prevented from seeping out to the surface side (indoor space 10 side) of the ceiling material 20. The water collected in the water receiver will naturally dry when the humidity in the attic space 11 decreases due to a change in weather.

[0034] <Embodiment 2> A dew condensation prevention structure 1A according to the second embodiment will be described with reference to Fig. 3. In the dew condensation prevention structure 1A, a spacer 50A is disposed around the air conditioner 40 in addition to the configuration of the first embodiment.

[0035] Prior to describing the condensation prevention structure 1A according to this embodiment, condensation that occurs around a typical air conditioner will be briefly described with reference to Fig. 11. As shown in Fig. 11, in a typical ceiling-embedded air conditioner 140, the cool air blown out from the air outlet 141 flows along the extension direction of the ceiling material 120, so that condensation occurs on the back side of the ceiling material 120 (the side of the ceiling space 111).

[0036] Therefore, in this embodiment, as shown in FIG. 3, in order to further suppress the occurrence of condensation on the surface side (the ceiling space 111 side) of the ceiling material 20, a spacer 50A is arranged in addition to the configuration of the first embodiment. The spacer 50A is provided between the ceiling material 20 and the air conditioner 40, and serves to position the air outlet 41 of the air conditioner 40 at a lower position. The spacer 50A is preferably provided along all four sides of the air conditioner 40, but may be provided partially. The height of the spacer 50A is, for example, 30 mm or more, and preferably 50 mm or more. This allows the height position of the air outlet 41 of the air conditioner 40 to be lowered by 30 mm or more.

[0037] In the condensation prevention structure 1A of this embodiment, a spacer 50A is placed between the air conditioner 40 and the ceiling material 20, so that the cold air from the air conditioner 40's air outlet 41 is sent out diagonally downward and does not flow along the ceiling material 20, thereby preventing condensation from occurring on the back side of the ceiling material 20.

[0038] <Embodiment 3> A dew condensation prevention structure 1B according to embodiment 3 will be described with reference to Fig. 4 and Fig. 5. The dew condensation prevention structure 1B differs from the configurations of embodiments 1 and 2 in that a wind direction material 60B is arranged around the air conditioner 40.

[0039] The air direction material 60B is provided around the air conditioner 40 to prevent the air blown out from the air outlet 41 of the air conditioner 40 from hitting the ceiling material 20. As shown in Fig. 5, the air conditioner 40 has a general shape, and the air outlet 41 includes a central air outlet 42 that is rectangular in bottom view, and four side air outlets 43 that extend along each side of the central air outlet 42.

[0040] As shown in FIG. 5 in particular, the wind direction material 60B is provided on each of the four sides of the air conditioner 40, and extends along the extension direction of the side air outlet 43. Specifically, as shown in FIG. 4, the wind direction material 60B includes a support part 61B attached to the ceiling material 20, and a wind direction material main body 62B supported by the support part 61B. The shape of the support part 61B is not limited, but is formed, for example, in a U-shape to hold the ceiling material 20. The wind direction material main body 62B is in the form of a plate extending along the side air outlet 43 of the air conditioner 40. The wind direction material main body 62B extends in a direction perpendicular to the ceiling material 20.

[0041] In the condensation prevention structure 1B of this embodiment, a wind direction material 60B is provided around the air conditioner 40, so that, as shown by the arrows in Figure 4, the air from the air outlet 41 of the air conditioner 40 flows downward after hitting the wind direction material main body 62B, and does not flow along the ceiling material 20, thereby preventing condensation from occurring on the back side of the ceiling material 20.

[0042] A modified example of this embodiment is shown in Fig. 6. The wind direction material 60C of the condensation prevention structure 1C shown in Fig. 6 has a shape in which the wind direction material main body 62C is inclined with respect to the support part 61B. Specifically, the wind direction material main body 62C is inclined from above to below in a direction away from the air conditioner 40. The wind direction material main body 62C is provided so that the inclination angle can be changed. This angle change may be performed manually or automatically.

[0043] In the dew condensation prevention structure 1C of this modification, the air direction material body 62C is inclined, so that the cool air blown out from the air outlet 41 of the air conditioner 40 can be delivered not only downward but also diagonally downward in a wide range. Therefore, in addition to being able to prevent dew condensation on the back side of the ceiling material 20, the indoor space 10 can be cooled efficiently.

[0044] A further modified example of the condensation prevention structure 1C is shown in Fig. 7. The wind direction material 60D of the condensation prevention structure 1D shown in Fig. 7 is supported by the air conditioner 40. Specifically, the support portion 61D of the wind direction material 60D is formed, for example, in a U-shape to hold the end of the air conditioner 40. The wind direction material main body 62B may be provided vertically like the wind direction material main body 62B of the condensation prevention structure 1B (Fig. 4) of the above-mentioned embodiment, but may be provided at an incline like the condensation prevention structure 1C (Fig. 6) of the above-mentioned embodiment, or may be provided so that the inclination angle can be changed.

[0045] In this way, the location where the air direction material is attached may be the ceiling material 20 or the air conditioner 40, but if it is attachable to the air conditioner 40, it can be installed as an add-on even after the air conditioner 40 has been installed.

[0046] <Fourth embodiment> A dew condensation prevention structure 1E according to embodiment 4 will be described with reference to Figures 8 and 9. The dew condensation prevention structure 1E differs from the configurations of embodiments 1 to 3 in that air communication holes 70E are provided around the air conditioner 40 to create an air flow, thereby preventing the cool air from the air conditioner 40 from hitting the ceiling material 20.

[0047] The condensation prevention structure 1E of the present embodiment is provided with an air communication hole 70E in a gap provided between the ceiling material 20 and the air conditioner 40. The air communication hole 70E is for taking air from the attic space 11 into the indoor space 10. Specifically, a parting material 71E is arranged between the ceiling material 20 and the air conditioner 40, and the air communication hole 70E is provided in the parting material 71E. As shown in Fig. 9, the air communication holes 70E are provided on all four sides along the air outlet 41 of the air conditioner 40, and extend along the extension direction of the side air outlets 43.

[0048] Generally, indoor space 10 is provided with, for example, a ventilation fan, and when air is exhausted in indoor space 10, air in attic space 11 is sucked into indoor space 10. As a result, as shown by the arrow in FIG. 8, air communication hole 70E generates a downward airflow from attic space 11 to indoor space 10. Therefore, by blowing the cold air blown out horizontally from air outlet 41 of air conditioner 40 into the airflow from air communication hole 70E, the air from air outlet 41 of air conditioner 40 is corrected to be diagonally downward. This makes it possible to prevent the cold air from air conditioner 40 from blowing into ceiling material 20.

[0049] In addition, the air communication hole 70E of the condensation prevention structure 1E in this embodiment is formed by providing a slit in the trim material 71E along the four sides of the air conditioner 40, but multiple holes may be provided along the four sides of the air conditioner 40.

[0050] (Modification) Although the condensation prevention structures 1 to 1E according to a plurality of embodiments 1 to 5 have been described above, these embodiments 1 to 5 may be combined as appropriate.

[0051] Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the illustrated embodiment. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0052] 1, 1A, 1B, 1C, 1D, 1E Condensation prevention structure, 10 indoor space, 11 attic space, 20 ceiling material, 21 first area, 22 second area, 23 ceiling base material, 24 first rod-shaped member (ceiling base material), 30 insulation material, 40 air conditioner, 41 air outlet, 50A spacer, 60B, 60C, 60D air direction material, 70E air communication hole, 71E trim material, 110 indoor space, 111 attic space, 120 ceiling material, 140 air conditioner, 141 air outlet, C1, C2 condensation.

Claims

1. A condensation prevention structure for preventing condensation occurring around an air conditioner installed on a ceiling of an indoor space, a ceiling material having a first area whose surface faces the indoor space and surrounds the air conditioner on all four sides, and a second area which is an area outside the first area; A ceiling base material supporting the ceiling material; a soft insulation material overlaid on the back side of the first region of the ceiling material, The heat insulating material is compressed and fixed by the ceiling base material, thereby preventing condensation.

2. The condensation prevention structure according to claim 1 , wherein the heat insulating material is provided across two or more of the ceiling underlayment materials.

3. The condensation prevention structure according to claim 1 , further comprising a spacer provided between the ceiling material and the air conditioner for lowering an air outlet of the air conditioner downward.

4. A condensation prevention structure for preventing condensation occurring around an air conditioner installed on a ceiling of an indoor space, A ceiling material facing the indoor space; The condensation prevention structure includes a wind direction member provided around the air conditioner for changing the direction of air blown out from the air outlet of the air conditioner so that the air does not hit the ceiling material.

5. The condensation prevention structure according to claim 4 , wherein the air direction material is attached to either the ceiling material or the air conditioner.

6. A condensation prevention structure for preventing condensation occurring around an air conditioner installed on a ceiling of an indoor space, A ceiling material located between the indoor space and the attic space; A condensation prevention structure is provided, the condensation prevention structure being provided around the air conditioner and including an air communication hole that generates an air current from the attic space toward the indoor space.

7. The condensation prevention structure according to claim 6 , wherein the air communication hole is formed in a trim material disposed between the ceiling material and the air conditioner.

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