Dew condensation prevention structure and method

Abstract

To provide a dew condensation prevention structure capable of preventing occurrence of dew condensation in a chamber surrounded with walls with a simple configuration.SOLUTION: A dew condensation prevention structure prevents occurrence of dew condensation in a chamber (12) surrounded with walls, and includes a notch recess (130) which is provided in a part of the walls and is open to the side of an indoor space (120), and a dew condensation promotion member (3) which is provided in a notch recess and has thermal conductivity. Dew condensation is generated in the dew condensation promotion member by a temperature difference between two spaces (S1 and S2) sandwiching the dew condensation promotion member.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a condensation prevention structure and method, and more particularly to a condensation prevention structure and condensation collector that prevent condensation from occurring in a walled room. [Background technology]

[0002] Techniques for preventing condensation on the walls and ceilings of buildings such as houses have been proposed. For example, Japanese Patent Laid-Open Publication No. 09-174731 (Patent Document 1) discloses a technique for preventing condensation by providing a condensation prevention material in contact with the surface of a water-absorbent synthetic resin sheet on the inner surface of the exterior material of an exterior wall or the inner surface of the roof material in the attic. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 09-174731 Summary of the Invention [Problem to be solved by the invention]

[0004] To prevent condensation on the walls and ceilings of buildings, it is common to improve the insulation of the walls and ceilings themselves or to dehumidify the indoor space.

[0005] Furthermore, although applying anti-condensation materials as in Patent Document 1 is effective, the anti-condensation materials must be applied over a wide area, and there has been a demand for technology that can more effectively prevent condensation on walls and ceilings.

[0006] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a condensation prevention structure and method that can prevent condensation from occurring in a room surrounded by walls with a simple configuration. [Means for solving the problem]

[0007] A dew condensation prevention structure according to one aspect of the present invention is a dew condensation prevention structure that prevents dew condensation from occurring in a room surrounded by walls, and includes a notched recess provided in a part of the wall that opens toward the indoor space, and a dew condensation promotion member provided within the notched recess and having thermal conductivity.

[0008] Preferably, the condensation promotion member has a substantially U-shaped cross section that opens toward the indoor space, and a first condensation generating space is formed inside the condensation promotion member.

[0009] Preferably, the condensation prevention structure further includes a surface covering portion disposed between the first condensation occurrence space and the indoor space and having an air vent.

[0010] More preferably, the dew condensation prevention structure further includes a back surface covering portion having a ventilation hole, the back surface covering portion being arranged so as to form a second dew condensation space outside the dew condensation promotion member.

[0011] Preferably, the condensation promoting member, the front covering portion, and the back covering portion are integrally connected to form a condensation collecting device.

[0012] Preferably, a drain port is formed in the lower end surface of the notched recess for discharging condensed water adhering to the condensation promotion member to the outside.

[0013] A dew condensation prevention method according to another aspect of the present invention is a method for preventing condensation from occurring in a room surrounded by walls, in which a notched recess is provided in a part of the wall that opens toward the indoor space, a condensation collection device including a thermally conductive condensation promotion member is fitted into the notched recess, condensation occurs on the condensation promotion member due to the temperature difference between two spaces that sandwich the condensation promotion member, and the condensation water adhering to the condensation promotion member is drained to the outside. [Effects of the Invention]

[0014] According to the present invention, it is possible to prevent condensation from occurring in a room surrounded by walls with a simple configuration. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic diagram illustrating an overview of a condensation prevention structure according to an embodiment of the present invention. [Figure 2] 1 is a cross-sectional view showing a schematic installation state of a condensation collecting device according to an embodiment of the present invention. [Figure 3] 1 is a vertical cross-sectional view showing a schematic installation state of a condensation collecting device according to an embodiment of the present invention. [Figure 4] FIG. 10 is a cross-sectional view illustrating a method for preventing condensation in winter. [Figure 5] FIG. 10 is a vertical cross-sectional view illustrating a method for preventing dew condensation in winter. [Figure 6] FIG. 10 is a cross-sectional view illustrating a method for preventing condensation in summer. [Figure 7] FIG. 10 is a vertical cross-sectional view illustrating a method for preventing condensation in summer. DETAILED DESCRIPTION OF THE INVENTION

[0016] 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 numerals and description thereof will not be repeated.

[0017] <About the overview> FIG. 1 is a schematic diagram showing an outline of the dew condensation prevention structure in this embodiment, and FIG. 1(A) shows a schematic view of a portion to which a dew condensation collecting device is applied.

[0018] As shown in FIG. 1(A), a storage room 12 in a building such as a house is an unconditioned room, and therefore more susceptible to condensation in winter than a living room 11 that is equipped with an air conditioner (not shown). When air-conditioned in winter, the humidity in the storage room 12 is high, and condensation is more likely to occur near corners C1 of the walls (e.g., exterior walls 13) of the storage room 12. On the other hand, in summer, condensation is more likely to occur in the center C2 of the walls (e.g., exterior walls 13) of the living room 11, which is an air-conditioned room.

[0019] Fig. 1(B) shows an example in which a condensation collector 2 is placed near a corner C1 of the exterior wall 13 (the intersection with the exterior wall 14). The condensation collector 2 is fitted into a notched recess 130 provided on the indoor side of the exterior wall 13. Fig. 1(B) is a front view of the exterior wall 13 as seen from the direction IB in Fig. 1(A). Note that arrow A1 in Fig. 1(B) indicates the width direction (left-right direction) of the exterior wall 13, and arrow A2 indicates the up-down direction (vertical direction) of the exterior wall 13.

[0020] 1(B), it is desirable that the notched recess 130 and the condensation collector 2 extend vertically from the floor surface 15 to the ceiling surface 16. The notched recess 130 in this embodiment is a vertical slit provided on the indoor side of the exterior wall 13. In the following description, the notched recess 130 will be referred to as the vertical slit 130.

[0021] <About the vertical slits> The vertical slit 130 will be described with reference to Fig. 2. Fig. 2 is a cross-sectional view showing a schematic view of the installation state of the condensation collector 2, taken along line II-II in Fig. 1(B). Note that arrow A3 in Fig. 2 indicates the direction toward the outdoors when the exterior wall 13 is used as the reference.

[0022] To briefly explain the schematic configuration of exterior wall 13, exterior wall 13 includes interior finishing material 131 facing indoor space 120 and exterior material 132 facing the outdoor space, with a thermal insulation layer 136 between interior finishing material 131 and exterior material 132. Thermal insulation layer 136 includes at least thermal insulation material 133 filled inside (between adjacent furring strips) of a panel frame (not shown). Thermal insulation layer 136 may further include a light steel substrate 135 for attaching interior finishing material 131, and an air layer 134 formed between light steel substrate 135 and the panel frame. Exterior material 132 is composed of one or more face plates.

[0023] The vertical slit 130 is a recess that opens to the indoor space 120 side, and is formed by cutting out at least a portion of the interior finishing material 131 and the insulating layer 136. In this embodiment, most of the interior finishing material 131 and the insulating material 133 are cut out. Therefore, the thickness of the insulating material 133 in the vertical slit 130 is sufficiently thinner than the thickness of the insulating material 133 in other general parts. Note that in Figure 2 and other figures, the (thin) insulating material 133 in the area of ​​the vertical slit 130 is omitted from the illustration to avoid cluttering the drawings.

[0024] The width D of the vertical slit 130 is, for example, within the range of 100 mm to 150 mm. The width D is determined so that the condensation collecting function can be performed and the insulation defect of the outer wall 13 does not become large.

[0025] <Example of condensation collection device configuration> An example of the configuration of the condensation collection device 2 will be described with reference to Figures 2 and 3. Figure 3 is a vertical cross-sectional view schematically showing the installation state of the condensation collection device 2, showing a cross-section along line III-III in Figure 1(B).

[0026] The condensation collecting tool 2 in this embodiment integrally includes a condensation promoting member 3, a front surface covering part 4, and a back surface covering part 5. In other words, the condensation collecting tool 2 is constituted by the condensation promoting member 3, the front surface covering part 4, and the back surface covering part 5 being integrally connected.

[0027] (Condensation promoting material) The dew condensation promotion member 3 is made of a thermally conductive material. While aluminum, which has high thermal conductivity, is a preferred specific material, other metals such as aluminum alloys, stainless steel, and copper plates may also be used. Alternatively, materials other than metals may also be used.

[0028] The condensation promotion member 3 has a substantially U-shaped (channel-shaped) cross section that opens toward the indoor space 120, and integrally includes a central plate portion 31 and a pair of side plate portions 32. The condensation promotion member 3 is formed by bending or the like. Inside the condensation promotion member 3, a first condensation generation space S1 is formed.

[0029] The central plate portion 31 is located on the outdoor side of the interior finishing material 131, at the center of the depth direction (inside-outside direction) of the vertical slit 130. The central plate portion 31 is located within the thickness range of the insulation layer 136 of the exterior wall 13. The central plate portion 31 is located approximately parallel to the interior finishing material 131. The side plate portions 32 are located so as to protrude toward the indoor side from both ends of the central plate portion 31 in the width direction. The indoor side ends of the side plate portions 32 are located on the arrangement line of the interior finishing material 131.

[0030] The condensation promotion member 3 does not have any holes (vent holes). The space surrounded by the central plate portion 31 and the pair of side plate portions 32 forms the first condensation generation space S1. The inner surface 3a of the condensation promotion member 3 facing the first condensation generation space is an attachment surface to which condensation adheres (in winter). The outer surface 3b of the condensation promotion member 3 is also an attachment surface to which condensation adheres (in summer). It is desirable that the attachment surfaces (inner surface 3a and outer surface 3b) of the condensation promotion member 3 are flat surfaces without any irregularities. This makes it easier for condensation water (water droplets formed by condensation) attached to the attachment surfaces to run down the attachment surfaces.

[0031] The width of the dew condensation promotion member 3 is smaller than the width D of the vertical slit 130. The thickness of the dew condensation promotion member 3 is, for example, about 0.8 mm. The thickness of the dew condensation promotion member 3 is determined within the range of 0.5 mm to 1.5 mm, taking into account thinness and strength.

[0032] (Surface coating part) The front surface covering part 4 is a plate-like member placed between the first condensation generating space S1 and the indoor space 120, and has ventilation holes 40. As shown in FIG. 2, the front surface covering part 4 is formed, for example, from a flat punched plate having a large number (plurality) of small-diameter ventilation holes 40. The front surface covering part 4 is desirably formed, for example, from a material such as resin that has a lower thermal conductivity than the condensation promotion member 3. The same applies to the back surface covering part 5.

[0033] The surface covering portion 4 is disposed on approximately the same plane as the interior finishing material 131. It is also disposed approximately parallel to the central plate portion 31 of the condensation promotion member 3. Both widthwise ends of the surface covering portion 4 are connected to the tips (indoor side ends) of the pair of side plate portions 32, so that the indoor space 120 and the first condensation generation space S1 communicate only through the air vent 40. As a result, moisture in the indoor space 120 is taken into the first condensation generation space S2 through the air vent 40.

[0034] (Back surface covering part) The back surface covering part 5 is arranged so as to form a second condensation generation space S2 on the outside (outdoor side) of the condensation acceleration member 3, and has ventilation holes 50 in at least a portion thereof. The second condensation generation space S2 is formed in a substantially U-shape so as to face the outer surface 3b of the groove-shaped condensation acceleration member 3. The back surface covering part 5 has a substantially C-shaped cross section and integrally includes a back plate part 51, a pair of outer plate parts 52, and a pair of front plate parts 53. The back surface covering part 5 is also formed by bending or the like.

[0035] The back plate portion 51 is disposed at the innermost side (outdoor side) of the vertical slit 130. The back plate portion 51 is in contact with or close to the remaining insulating material 133 in the vertical slit 130. The back plate portion 51 is disposed substantially parallel to the central plate portion 31 of the condensation promotion member 3, and has a width greater than that of the central plate portion 31. Similar to the surface covering portion 4, a large number (plurality) of small-diameter ventilation holes 50 are provided over substantially the entire back plate portion 51. If there is no insulating material 133 in the vertical slit 130, the back plate portion 51 may be disposed so as to face the back surface of the exterior material 132.

[0036] The pair of outer plate portions 52 are provided so as to protrude indoors from both widthwise ends of the back plate portion 51. The indoor-side end of the outer plate portion 52 is located on the arrangement line of the interior finishing material 131. The outer plate portion 52 is located within the thickness range of the insulation layer 136 of the exterior wall 13. The outer plate portion 52 is in contact with or adjacent to the cut surface (side surface) of the insulation material 133. A large number of small-diameter vent holes 50 are provided in at least the portion of the outer plate portion 52 located within the thickness range of the insulation material 133 (the portion in contact with or adjacent to the cut surface of the insulation material 133). In the example of FIG. 2, no holes are provided in the portion located within the thickness range of the interior finishing material 131 and the light steel base 135. As a result, (only) moisture absorbed by the insulation material 133 is taken into the second condensation generation space S2 through the vent holes 50. Note that the vent holes 50 may also be provided in the portion located in the air layer 134.

[0037] The pair of front plate portions 53 are provided so as to protrude inward from the indoor side end of the outer plate portion 52. The pair of front plate portions 53 are provided on both sides of the surface covering portion 4 so as to be approximately flush with the surface covering portion 4. The front plate portions 53 are interposed between the surface covering portion 4 and the interior finishing material 131. As shown in Figures 1(B) and 2, the front plate portions 53 have no holes. This prevents air (moisture) from the indoor space 120 from flowing into the second condensation generating space S2.

[0038] (Drainage route) As shown in Fig. 3, drain outlets 61, 62 are provided in lower end surfaces (bottom surfaces) 151, 152 of the first and second condensation generating spaces S1, S2, respectively. The lower end surfaces 151, 152 correspond to the lower end surfaces of the vertical slits 130 and are typically at the same level as the floor surface 15 of the indoor space 120. It is desirable to provide a strainer in each of the drain outlets 61, 62. The lower end surfaces 151, 152 may be sloped (water gradient) to allow condensation water W to flow into the drain outlets 61, 62.

[0039] <How to prevent condensation in winter (when heating)> A method for preventing condensation in the storage room 12 in winter will be described with reference to Figures 4 and 5. Figures 4 and 5 correspond to Figures 2 and 3, respectively. As described above, a vertical slit 130 is provided in the corner C1 of the outer wall 13, and a condensation collector 2 is fitted into the vertical slit 130.

[0040] When the living room 11 is heated in winter, the indoor space 120 of the storage room 12, which tends to be insufficiently ventilated, becomes more humid than the living room 11. Because the insulating material 133 in the area of ​​the vertical slit 130 of the exterior wall 13 is thinner than in other parts, the temperature of the second condensation generation space S2 becomes closer to the temperature of the outdoor space (outside air temperature) (it becomes colder). The temperature difference between the two spaces S1, S2 sandwiching the condensation promotion member 3 becomes large. As a result, the warm air in the first condensation generation space S1, which is in communication with the indoor space 120, comes into contact with the inner surface 3a of the condensation promotion member 3, causing condensation to occur on the inner surface 3a.

[0041] The condensation water W adhering to the inner surface 3a of the condensation promotion member 3 falls within the first condensation collection space S1 under its own weight. As shown in Fig. 5, a drain outlet 61 for discharging the condensation water W is formed in the lower end surface 151 of the first condensation generation space S1. The condensation water W that has fallen from the condensation promotion member 3 is discharged from the drain outlet 61 to the outside via a discharge pipe 61t.

[0042] In this way, moisture contained in the air in the indoor space 120 turns into condensed water W in the first condensation generating space S1 and is discharged, thereby reducing the absolute humidity of the indoor space 120. That is, during heating, condensation is promoted only in the area of ​​the vertical slits 130, thereby achieving a humidity control effect for the air in the indoor space 120. This makes it possible to effectively prevent condensation damage (such as mold growth) on the surface of the exterior wall 13 (interior finishing material 131) and the ceiling surface 16, which is likely to occur in winter.

[0043] <How to prevent condensation in summer (when air conditioning is on)> A method for preventing condensation in the living room 11 in summer will be described with reference to Figures 6 and 7. Figures 6 and 7 correspond to Figures 2 and 3 described above, respectively. As shown in Figure 6, in summer, it is desirable to provide a vertical slit 130 in the widthwise center C2 of the exterior wall 13 (14) facing the indoor space 110 of the living room 11, and to fit a condensation collector 2 into the vertical slit 130. A plurality of vertical slits 130 and condensation collectors 2 may be provided at regular intervals along the widthwise direction of the exterior wall 13.

[0044] When the living room 11 is overcooled in the summer, the insulation 133 of the exterior wall 13 (14) that separates the indoor space 110 of the living room 11 becomes more susceptible to absorbing moisture due to the temperature difference between the outdoor space and the exterior wall 13 (14). Because the insulation 133 in the area of ​​the vertical slit 130 of the exterior wall 13 is thinner than in other parts, the temperature of the second condensation generation space S2 becomes close to (higher than) the temperature of the outdoor space (outdoor air temperature). Meanwhile, the first condensation generation space S1 of the condensation promotion member 3 is cooled by the influence of the low-temperature indoor space 110, so the temperature difference between the two spaces S1 and S2 that sandwich the condensation promotion member 3 becomes larger. As a result, the high-temperature air in the second condensation generation space S2 comes into contact with the outer surface 3b of the condensation promotion member 3, causing condensation to occur on the outer surface 3b.

[0045] The condensation water W adhering to the outer surface 3b of the condensation promotion member 3 falls under its own weight within the second condensation collection space S2. As shown in Fig. 7, a drain outlet 62 for discharging the condensation water W is formed in the lower end surface 152 of the second condensation generation space S2. The condensation water W that has fallen from the condensation promotion member 3 is discharged from the drain outlet 62 to the outside via a discharge pipe 62t.

[0046] In this way, the moisture contained in the insulating material 133 of the exterior wall 13 becomes condensed water W in the second condensation space S2 and is discharged, thereby reducing the amount of moisture contained in the insulating material 133. In other words, during overcooling or long-term cooling operation, condensation is promoted only in the area of ​​the vertical slits 130, thereby achieving a humidity control effect inside the exterior wall 13. This makes it possible to effectively prevent damage caused by condensation inside the exterior wall 13 (such as the growth of mold), which is likely to occur in the summer.

[0047] As described above, according to this embodiment, a single condensation collector 2 can be used to prevent condensation in both winter and summer. Furthermore, because the condensation prevention structure according to this embodiment has a simple configuration, it can be retrofitted to an area where condensation actually occurs. In other words, by providing a vertical slit 130 in an area of ​​a wall, such as the exterior wall 13, where condensation occurs, and fitting the condensation collector 2 into the vertical slit 130, condensation prevention can be easily implemented.

[0048] <Modification> In this embodiment, an example has been shown in which the condensation collection tool 2 has the condensation promotion member 3, the surface covering part 4, and the back surface covering part 5, but the condensation collection tool may not have the back surface covering part 5 and may consist of the condensation promotion member 3 and the surface covering part 4. Such a condensation collection tool is suitable for preventing condensation in winter. Alternatively, the condensation collection tool may not have the surface covering part 4 and may consist of the condensation promotion member 3 and the back surface covering part 5. Such a condensation collection tool is suitable for preventing condensation in summer. It is sufficient that the condensation collection tool has at least the condensation promotion member 3.

[0049] In the above embodiment, an example was shown in which the wall in which the vertical slit 130 is provided is an exterior wall, but this is not a limitation. The vertical slit 130 may be provided in a wall (such as a partition wall) separating two spaces where the temperature difference is constantly or temporarily large, and the above-mentioned condensation collector 2 may be applied.

[0050] In addition, an example has been shown in which the cutout recess provided in the wall is a vertical slit 130 extending from the bottom end to the top end of the wall, but this is not limited to such an example and may be provided only in a portion of the wall in the vertical direction.

[0051] Furthermore, the room for which measures against condensation are taken in winter is not limited to the storage room 12.

[0052] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0053] 2 Condensation collection device, 3 Condensation promotion member, 4 Surface covering portion, 5 Back covering portion, 11 Living room, 12 Storage room, 13, 14 Exterior wall, 15 Floor surface, 16 Ceiling surface, 40, 50 Ventilation hole, 61, 62 Drain outlet, 110, 120 Interior space, 130 Notched recess (vertical slit), S1 First condensation generation space, S2 Second condensation generation space, W Condensation water.

Claims

1. A condensation prevention structure that prevents condensation from occurring in a room surrounded by walls, A notched recess provided in a part of the wall and opening toward the indoor space; A dew condensation prevention structure comprising a dew condensation promotion member provided in the notched recess and having thermal conductivity.

2. The condensation promoting member has a substantially U-shaped cross section that opens toward the indoor space, The condensation prevention structure according to claim 1 , wherein a first condensation generation space is formed inside the condensation promotion member.

3. The condensation prevention structure according to claim 2 , further comprising a surface covering portion disposed between the first condensation generation space and the indoor space and having an air hole.

4. The condensation prevention structure according to claim 3 , wherein the condensation promoting member and the surface covering portion are integrally connected to form a condensation collecting device.

5. The condensation prevention structure according to any one of claims 1 to 4, further comprising a back surface covering portion having a ventilation hole, arranged so as to form a second condensation generation space outside the condensation promotion member.

6. The condensation prevention structure according to claim 5 , wherein the condensation promotion member and the back surface covering portion are integrally connected to form a condensation collector.

7. The condensation prevention structure according to claim 1 , wherein a drain port is formed in a lower end surface of the recessed portion for discharging condensation water adhering to the condensation promotion member to the outside.

8. A method for preventing condensation from occurring in a room surrounded by walls, comprising: A notched recess opening toward the indoor space is provided in a part of the wall, A condensation collecting device including a thermally conductive condensation promoting material is fitted into the notched recess; condensation is generated on the condensation promotion member due to a temperature difference between two spaces sandwiching the condensation promotion member; The condensation prevention method includes draining the condensation water adhering to the condensation promotion member to the outside.

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