JP5816477B2 - Wooden flooring - Google Patents

Description

  The present invention relates to a wooden flooring that includes at least a woody base material having a storage recess formed on the back surface and a latent heat storage material stored in the storage recess, and particularly preferably uses the latent heat storage material. It relates to a wooden flooring.

  Conventionally, a wooden floor material for floor heating has a storage recess formed on the back surface of the wooden base material, and a heat source such as a hot water pipe or an electric heater is stored in the storage recess. And this wooden type flooring is laid in the floor base surface, and these are connected through the real part.

  In recent years, research and development to make more effective use of thermal energy generated during indoor heating and natural energy such as solar radiation have been actively promoted in the technical field of flooring, from the viewpoint of environmental resistance. Energy conservation and ecological measures are taken based on these research and development.

  In view of such points, in recent years, development of wood-based floor materials using heat storage materials has been made. Here, as a heat storage material, a latent heat storage material that can store heat at a temperature equal to or higher than the melting point (phase change temperature) has attracted attention, and various wooden floor materials using the latent heat storage material have been proposed ( For example, see Patent Document 1).

  Such latent heat storage materials are widely used in other technical fields. For example, in order to effectively use the latent heat storage material, whether the latent heat storage material has exceeded a melting point (phase change temperature). A warming device equipped with a thermostat for measuring the temperature has been proposed (see, for example, Patent Document 2).

JP 2005-9829 A JP-A 61-5843

  For example, in the case of using a wooden floor material as in Patent Document 1, a heat source for floor heating is arranged in the vicinity of the latent heat storage material. Therefore, in order to effectively use the latent heat storage material, this heat source is used. What is necessary is just to control electrically.

  However, when using a wooden floor material without such a heat source and effectively utilizing heat such as sunlight or heat from indoor heating, the latent heat storage material is in any heat storage state, heat dissipation state, etc. It is important to know if it is in a state.

  Specifically, although the latent heat storage material is in a heat storage state, it may block sunlight and stop indoor heating. On the other hand, although the latent heat storage material is in a heat dissipation state (a state in which the heat stored in the latent heat storage agent is dissipated to the outside) and there is no need to store the latent heat storage material, the room heating is excessively operated. Sometimes As a result, the latent heat storage material may not be used effectively.

  Then, if the thermostat principle like patent document 2 is used, the arrival of the phase change temperature (melting point) of the latent heat storage material can be monitored. However, even if such monitoring is performed, the above-described state of the latent heat storage material cannot be sufficiently grasped.

  The present invention has been made in view of the above points, and provides a wooden flooring that can effectively utilize heat such as sunlight and indoor heating by grasping the state of the latent heat storage material. There is to do.

  As a result of intensive studies, the inventors have paid attention to the point that the temperature of the wooden flooring differs depending on the part when the latent heat storage material is in a heat release state, a heat storage state, etc., and at least two reversible types The new knowledge that the state of a latent heat storage material can be judged or estimated by confirming the change (discoloration) using this temperature indicating material was obtained.

  The present invention is based on this new knowledge, and the wood-based flooring according to the first invention includes a wood-based base material having a storage recess formed on the back surface, and a latent heat storage material stored in the storage recess. The surface of the wooden floor material is provided with a reversible first temperature indicating material that changes color at the same temperature as the phase change temperature of the latent heat storage material, and the stored heat. A reversible second temperature indicating material that changes color at the same temperature as the surface temperature of the wooden floor material when the latent heat storage material is in a heat radiating state is arranged.

  According to the present invention, the first temperature indicating material and the second temperature indicating material change at different temperatures. Specifically, the first temperature indicating material changes color at the same temperature as the phase change temperature (melting point) of the latent heat storage material. On the other hand, the second temperature indicating material utilizes the fact that the latent heat storage material becomes substantially constant at the phase change temperature when the latent heat storage material is in a heat dissipation state. In the heat dissipation state, when the temperature of the latent heat storage material is constant at the phase change temperature, a certain amount of heat per hour is radiated from the latent heat storage material to the surface of the wooden floor material via the wooden base material. The surface temperature of the wood-based flooring is constant at a temperature slightly lower than the phase change temperature. The second temperature indicating material changes color at the same temperature.

By utilizing such two temperature indicating materials, in the present invention, the state of the latent heat storage material can be determined or estimated as shown in the following (1) to (3).
(1) When neither the first temperature indicating material nor the second temperature indicating material is discolored, it can be easily determined visually that the latent heat storage material is not storing or releasing heat. In this case, heat storage to the latent heat storage material can be promoted by irradiating the surface of the wooden floor material with sunlight or operating indoor heating.

(2) When both the first temperature indicating material and the second temperature indicating material are discolored, it can be estimated that the latent heat storage material is storing heat. In this case, it is not necessary to further perform the indoor heating operation for promoting the heat storage to the latent heat storage material.

(3) When the first temperature indicating material is not discolored and only the second temperature indicating material is discolored, it can be estimated that the latent heat storage material is dissipated. That is, when the latent heat storage material is in a heat dissipation state, the latent heat storage material becomes substantially constant at the phase change temperature, and a certain amount of heat is radiated from the latent heat storage material per hour through the wooden base material. The temperature of the surface of the wooden flooring is constant at a temperature slightly lower than the phase change temperature. Thereby, only the 2nd temperature indicating material will be in the state discolored. Furthermore, when the discoloration of the second temperature indicating material returns to the original state, it can be estimated that the heat radiation by the latent heat storage material is completed. Thereby, the energy stored in the latent heat storage material can be effectively utilized.

  Here, the temperature indicating material referred to in the present invention “discolors” means that when the temperature reaches the same temperature (the same temperature as the phase change temperature in the case of the first temperature indicating material), it can be visually recognized. If it is possible to grasp that the temperature has reached that temperature, it is not necessary to start the color change of the temperature indicating material at that temperature. And if it is a temperature indicating material which has such a discoloration characteristic and has reversibility (property which returns to the original color below that temperature), the shape of the temperature indicating material is the temperature indicating ink, the temperature indicating tape, the temperature indicating label, the temperature indicating value. It is not particularly limited such as a seal, and the color before and after the color change is not particularly limited.

  Furthermore, as a preferable aspect according to the first invention, a through hole penetrating the storage recess is formed on the surface of the wooden base material, and the through hole is in contact with the latent heat storage material. A transparent resin material or a transparent glass material inserted in this manner is provided, and the portion where the resin material or glass material and the latent heat storage material abut is the same as the phase change temperature of the latent heat storage material. A third temperature indicating material that changes color with temperature is disposed.

  According to this aspect, the discoloration of the third temperature indicating material can be visually recognized from the surface side of the wooden floor material via the transparent resin material or the transparent glass material. When all of the first, second, and third temperature indicating materials are discolored, it can be reliably determined that the latent heat storage material is in the heat storage state. Further, when the third temperature indicating material starts to change color in a state where the first and second temperature indicating materials have changed color, it is possible to determine the start of heat storage on the latent heat storage material.

  On the other hand, when the first temperature indicating material is not discolored and the second and third temperature indicating materials are discolored, it can be determined that the latent heat storage material is dissipated. Further, when the third temperature indicating material starts to return to the original color, it is possible to determine the end of heat dissipation of the latent heat storage material. Thereby, the operation | movement of the indoor heating etc. for encouraging the heat storage to a latent heat storage material can be performed efficiently.

  Furthermore, the wood-based flooring according to the second invention is a wood-based flooring comprising at least a wood-based base material having a storage recess formed on the back surface and a latent heat storage material stored in the storage recess. In addition, a reversible first temperature indicating material that changes color at the same temperature as the phase change temperature of the latent heat storage material is disposed on the surface of the wooden floor material, and the storage recess is formed on the surface of the wooden base material. A through-hole is formed in the through-hole, and a transparent resin material or a transparent glass material inserted so as to contact the latent heat storage material is provided in the through-hole. A second temperature indicating material that changes color at the same temperature as the phase change temperature of the latent heat storage material is disposed at a portion where the material and the latent heat storage material contact each other.

According to the present invention, using the first and second temperature indicating materials, the state of the latent heat storage material can be determined as shown in the following (A) to (C). The configuration of the second temperature indicating material in the second invention is the same as the configuration of the third temperature indicating material in the first invention.
(A) When both the first temperature indicating material and the second temperature indicating material are not discolored, it can be visually determined that the latent heat storage material is not storing and releasing heat. In this case, heat storage to the latent heat storage material can be promoted by irradiating the surface of the wooden floor material with sunlight or operating indoor heating.

(B) When both the first and second temperature indicating materials are discolored, it can be determined that the latent heat storage material is storing heat. In this case, it is not necessary to perform the operation of room heating for promoting the heat storage to the latent heat storage material. When the first temperature indicating material starts to change color and the second temperature indicating material does not change color, it can be determined that there is a possibility that heat storage is started.

(C) When the first temperature indicating material is not discolored and only the second temperature indicating material is discolored, it can be determined that the latent heat storage material is dissipated. That is, when the latent heat storage material is in a heat dissipation state, the latent heat storage material becomes substantially constant at the phase change temperature, and a certain amount of heat is radiated from the latent heat storage material per hour through the wooden base material. The temperature of the surface of the wooden flooring is constant at a temperature slightly lower than the phase change temperature. Thereby, the 1st temperature display material arrange | positioned on the surface of a wood type flooring does not change. Therefore, when it is in the heat dissipation state, it is not necessary to perform the operation of indoor heating for promoting the heat storage to the latent heat storage material, so that the energy stored in the latent heat storage material can be effectively utilized.

  Furthermore, when the first temperature indicating material is not discolored and the color change of the second temperature indicating material returns to the original state (the state not discolored), it can be determined that the heat radiation by the latent heat storage material has been completed. Thereby, the operation | movement of the indoor heating etc. for encouraging the heat storage to a latent heat storage material can be performed efficiently.

  According to the first and second aspects of the invention, it is possible to effectively use heat such as sunlight and indoor heating by grasping the state of the latent heat storage material.

BRIEF DESCRIPTION OF THE DRAWINGS It is a typical perspective view of the wooden flooring which concerns on 1st Embodiment of 1st invention, (a) is a perspective view of the flooring (front surface) side wooden flooring, (b) is a back surface side The disassembled perspective view of a wooden type flooring. Sectional drawing when the wooden flooring shown in FIG. 1 is laid on the floor. The graph which showed an example of the temperature profile of the surface temperature T1 of the wood type flooring shown in FIG. 1, and the temperature T2 of a latent heat storage material, and the state of the discoloration of the 1st and 2nd temperature indicating material corresponding to this. It is a typical perspective view of the wooden flooring which concerns on 2nd Embodiment of 1st invention, (a) is a perspective view of the flooring (front surface) side wooden flooring, (b) is a back surface side The disassembled perspective view of a wooden type flooring. Sectional drawing when the wooden flooring shown in FIG. 4 is laid on the floor. The graph which showed an example of the temperature profile of the surface temperature T1 of the wood type flooring shown in FIG. 4, and the temperature T2 of a latent heat storage material, and the color change state of the 1st-3rd temperature indicating material corresponding to this. Sectional drawing when the wooden flooring which concerns on 3rd Embodiment (2nd invention) is laid on the floor surface. The graph which showed an example of the temperature profile of the surface temperature T1 of the wood type flooring shown in FIG. 7, and the temperature T2 of a latent heat storage material, and the color change state of the 1st and 3rd temperature indicating material corresponding to this.

Hereinafter, the present invention will be described based on the present embodiment with reference to the drawings.
[First embodiment (first invention)]
FIG. 1 is a schematic perspective view of a wooden flooring according to a first embodiment of the first invention, (a) is a perspective view of a wooden flooring on the floor (front surface) side, and (b). FIG. 2 is an exploded perspective view of the wooden floor material on the back side, and FIG. 2 is a cross-sectional view when the wooden floor material shown in FIG. 1 is laid on the floor surface.

  As shown in FIGS. 1A and 1B, the wooden flooring 10 according to this embodiment includes at least a wooden base 11 and a latent heat storage material 17.

  The wooden base material 11 is a base material for ensuring at least the rigidity and strength of the flooring, and as materials, ordinary plywood made of hardwood or conifer, LVL, LVB, MDF (wood fiber board), laminated wood, Furthermore, the laminated board which laminated | stacked these arbitrarily can be mentioned. Further, in the present embodiment, as shown in FIG. 1A, the surface 11a of the wood-based substrate 11 is provided with a surface cosmetic material such as oak material, birch material, beech material, teak material, etc., and a cosmetic surface synthesis. A resin sheet is attached.

  In addition, a male real part 12 a and a female real part 12 b are formed on the periphery of the wooden base material 11. By engaging the male real part 12a and the female real part 12b, the wooden flooring 10 can be actually joined as shown in FIG.

  Further, as shown in FIG. 1 (b), a housing recess 15 is formed on the back surface 11 b of the wooden base material 11. A latent heat storage material 17 is stored in the storage recess 15 from the bottom 15a toward the opening 15b, and the latent heat storage material 17 is attached to the bottom 15a of the storage recess 15 via an adhesive. .

Moreover, the latent heat storage material (latent heat storage body) 17 has a latent heat storage agent enclosed in a container 17a of a resin molded product such as ABS resin or polypropylene resin. Here, the latent heat storage agent is a latent heat storage agent that is melted by solar heat applied by sunlight or heat generated by indoor heating, and preferably has a phase change temperature in the range of (melting point) 18 ° C. to 28 ° C. It is a latent heat storage material. Specific examples include sodium sulfate hydrate, calcium chloride hydrate, paraffin (C ₁₈ H ₃₈ ), polyethylene glycol (molecular weight 500 to 1000), and the like that can store heat above this melting point. If so, the material is not particularly limited.

  In this embodiment, the latent heat storage material is specified as a container enclosing the latent heat storage agent. However, if the latent heat storage agent can be sealed in the storage recess 15, the latent heat storage material itself. However, it may be a latent heat storage agent.

  Here, the heat storage state of the latent heat storage material 17 refers to a state in which the latent heat storage agent of the latent heat storage material 17 is melted by heat from the outside and stores the heat. In this case, the latent heat storage agent is stored. The temperature of is at or above the phase change temperature (melting point). On the other hand, the heat release state of the latent heat storage material 17 refers to a state in which the heat stored in the heat storage state is radiated to the outside. At this time, the temperature of the latent heat storage material is maintained at a phase change temperature (melting point) for a predetermined time. Is done.

  A first temperature indicating material 31 and a second temperature indicating material 32 are disposed on the surface 11 a of the wooden floor material 10. Specifically, the first temperature indicating material 31 is a reversible temperature indicating ink that changes color at the same temperature as the phase change temperature (color change temperature Te1) of the latent heat storage material (specifically, latent heat storage agent) 17. For example, when the phase change temperature (melting point) of the latent heat storage agent is 25 ° C., the first temperature indicating material 31 is temperature indicating ink that changes color (the color change can be visually recognized) at 25 ° C. (same temperature).

  On the other hand, the second temperature indicating material 32 is a reversible temperature indicating ink that changes color at the same temperature as the surface temperature (color changing temperature Te2) of the wooden flooring 10 when the stored latent heat storage material 17 is in a heat radiating state. . Here, when the latent heat storage material 17 is in a heat radiating state, the second temperature indicating material 32 uses that the latent heat storage material 17 becomes substantially constant at a phase change temperature (for example, 25 ° C.).

  That is, when the latent heat storage material 17 is constant at the phase change temperature, a constant amount of heat is radiated from the latent heat storage material 17 through the wooden base material 11, so that the wooden floor material 10 The surface temperature is constant at a temperature (for example, 22 ° C.) slightly lower than the phase change temperature (color change temperature Te1, for example, 25 ° C.). As the second temperature indicating material, one that changes color at the same temperature as this temperature (discoloration temperature Te2, for example, 22 ° C.) is selected. This discoloration temperature Te2 can be determined in advance through experiments or the like.

  In addition, it can be recognized that the discoloration of the first and second temperature indicating materials is higher than the color change temperature (for example, 25 ° C. for the first temperature indicating material and 22 ° C. for the second temperature indicating material). Any color change is possible as long as it is a reversible type that returns to the original color as the temperature drops, and if it can be repeatedly determined by the color change that the temperature has been reached, the color change is not necessarily required. Does not have to start.

  The first and second temperature indicating materials are generally temperature indicating inks that are commercially available, and include, for example, an electron donating color-forming organic compound, a phenolic hydroxyl group-containing compound, and an alcoholic hydroxyl group-containing compound as main components. Temperature indicators using metal complex compounds that contain organic compounds such as organic dyes and organic pigments, thermochromic substances that are complex compounds of transition metals such as copper, etc. Known temperature indicating agents such as an agent can be mentioned, and the color change temperature can be changed by changing the blending ratio of these components.

  Examples of commercially available temperature inks include thermal color OR-20 (manufactured by Recording Materials Research Laboratory Co., Ltd.), and instead of temperature ink, a temperature indicating tape, a temperature label, a temperature seal, etc. may be used. . Examples of commercially available temperature indicating seals include medecyl color (manufactured by NOF Corporation).

  Then, as shown in FIG. 2, the wood-based flooring 10 obtained in this way is actually joined together with the other wood-based flooring 10 ′ not provided with the temperature indicating material on the floor ground surface 71a. Laid. Here, the wooden flooring 10 according to the present embodiment is actually joined to the other wooden flooring 10 ′ not provided with the temperature indicating material, but all the flooring is the wooden flooring 10. Alternatively, the wooden flooring 10 may be further laid at a place where necessary.

  FIG. 3 shows an example of the temperature profile of the surface temperature T1 of the wooden floor material and the temperature T2 of the latent heat storage material shown in FIG. 1, and the state of discoloration of the first and second temperature indicating materials corresponding thereto. It is a graph. The temperature profile with the passage of time of the surface temperature T1 of the wooden floor material of FIG. 3 and the temperature T2 of the latent heat storage material will be described, and the state of discoloration of the first and second temperature indicating materials will be described below.

  As shown in FIG. 3, before the time t0, the surface temperature T1 of the wooden flooring material and the temperature T2 of the latent heat storage material are both lower than the discoloration temperatures Te1 and Te2, so the first temperature indicating material 31 and Both the second temperature indicating materials 32 are not discolored.

  In this state, it can be easily determined visually that the latent heat storage material 17 is not storing and releasing heat. Then, by irradiating the surface of the flooring material including the wooden flooring with sunlight or operating indoor heating, the surface of the wooden flooring receives heat from sunlight, heating, etc., and the latent heat The heat storage material 17 is urged to store heat.

  When the surface of the wooden flooring 10 is heated by sunlight, heating, or the like, the surface temperature T1 of the wooden flooring and the temperature T2 of the latent heat storage material increase accordingly. Here, first, at time t0, the surface temperature T1 of the wooden floor material reaches the color change temperature Te2 of the second temperature indicating material, and the second temperature indicating material 32 changes color.

  When the surface of the wooden flooring 10 is further input, the surface temperature T1 of the wooden flooring and the temperature T2 of the latent heat storage material rise. Then, at time t1, the surface temperature T1 of the wooden floor material reaches the color change temperature of the first temperature indicating material (that is, the phase change temperature of the latent heat storage agent) Te1, and the first temperature indicating material 31 changes color.

  Furthermore, when the surface of the wooden flooring 10 is input until time tc, the temperature T2 of the latent heat storage material reaches the phase change temperature (color change temperature Te1) at a certain time (between times t1 and tc). Then, the latent heat storage agent melts, and at this stage, heat storage of the latent heat storage material is started. That is, at this time, both the first temperature indicating material 31 and the second temperature indicating material 32 are discolored. Therefore, in the case of the present embodiment, when both the first temperature indicating material 31 and the second temperature indicating material 32 are discolored, it can be estimated that the latent heat storage material 17 is stored (heat storage state). . In this case, it is not necessary to further perform the operation of indoor heating for promoting the heat storage in the latent heat storage material 17.

  Next, after the time tc, heat input to the surface of the wooden flooring 10 is lost. Along with this, the surface temperature T1 of the wooden floor material decreases, and the temperature T2 of the latent heat storage material decreases with a slight delay. Furthermore, after the time t2, the surface temperature T1 of the wooden floor material is lower than the color change temperature Te1 of the first temperature indicating material 31, and the first temperature indicating material 31 that has changed color returns to the original color (no color change). ).

  And until the time t4, the latent heat storage material 17 is radiated. Here, during the period from time t3 to time t4, the temperature of the latent heat storage material 17 is maintained at a constant temperature as the phase change temperature (color change temperature Te1). Until this time, the temperature of the second temperature indicating material 32 is the color change temperature. Only the second temperature indicator 32 is held in Te2 and the discolored state is maintained.

  From this, when the first temperature indicator 31 is not discolored and only the second temperature indicator 32 is discolored as in the state from time t2 to t4, the latent heat storage material 17 is It can be estimated that heat is released (heat dissipation state). In this case, the energy stored in the latent heat storage material 17 can be used effectively. Furthermore, since the discoloration of the second temperature indicating material 32 returns to the original state after the time t4, it can be estimated that the heat radiation by the latent heat storage material 17 is completed at this time. Thus, by grasping the state of the latent heat storage material, it is possible to effectively utilize heat such as sunlight and indoor heating.

[Second Embodiment (First Invention)]
FIG. 4 is a schematic perspective view of a wooden flooring according to a second embodiment of the first invention, (a) is a perspective view of a wooden flooring on the floor (front surface) side, and (b). FIG. 2 is an exploded perspective view of a wooden floor material on the back side. FIG. 5 is a cross-sectional view when the wooden flooring shown in FIG. 4 is laid on the floor surface.

  The point that the wooden flooring of the second embodiment is different from that of the first embodiment is that a third temperature indicating material is further provided on the wooden flooring. Therefore, the same members and portions as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

  Specifically, as shown in FIGS. 4 and 5, a through hole 19 is formed in the front surface 11 a of the wooden base material 11 so as to penetrate to the storage recess 15 formed on the back surface side. A cylindrical transparent resin material 34 is fitted into the through hole 19 so as to contact the latent heat storage material 17. A third temperature indicating material 33 that changes color at the same temperature as the phase change temperature of the latent heat storage material (latent heat storage agent) 17 is disposed at a portion where the resin material 34 and the latent heat storage material 17 abut. Further, the color change temperature Te3 of the third temperature indicating material 33 is the same temperature as the color change temperature Te1 of the first temperature indicating material, and the third temperature indicating material 33 is the same temperature indicating ink as the first temperature indicating material 31 described above. Can be used.

  Thus, by using the transparent resin material 34, the latent heat storage material 17 (container 17 a) is disposed between the resin material 34 and the resin material 34 from the surface side of the wooden base material 11. The third temperature indicating material 33 can be visually recognized. And it can confirm that the latent heat storage material 17 became more than phase change temperature by the discoloration of the 3rd temperature indicating material 33. FIG. Here, the resin material 34 is not particularly limited as long as the third temperature indicating material 33 can be visually recognized, and examples thereof include an acrylic resin, a polycarbonate resin, and an epoxy resin. . A transparent glass material may be used instead of the resin material 34.

  Here, in arranging the third temperature indicating material 33, first, the through hole 19 is drilled at a desired position of the wooden base material 11 with a drill. Next, the third temperature indicating material 33 is disposed on the tip side of the resin material 34 (applied in the case of temperature indicating ink). The tip of the resin material 34 is inserted into the through-hole 19 from the surface side of the wood base 11, and the third temperature indicator 33 at the tip of the resin material 34 is brought into contact with the latent heat storage material 17. In this way, a wooden flooring 10A shown in FIG. 5 can be obtained.

  FIG. 6 shows an example of the temperature profile of the surface temperature T1 of the wooden floor material and the temperature T2 of the latent heat storage material shown in FIG. 4, and the discoloration state of the first to third temperature indicating materials corresponding thereto. It is a graph. First, the temperature profile with the passage of time of the surface temperature T1 of the wooden floor material of FIG. 6 and the temperature T2 of the latent heat storage material is substantially the same as that shown in the first embodiment of FIG. The state of discoloration of the first to third temperature indicating materials associated with the temperature profile will be described. Note that the discoloration temperatures Te1 and Te3 of the first and third temperature indicating materials shown in FIG. 6 are the same temperature.

  As shown in FIG. 6, before the time t0, the first, second, and third temperature indicating materials 31, 32, and 33 are not discolored. In this state, it can be easily determined visually that the latent heat storage material 17 is not storing and releasing heat. Then, by irradiating the surface of the flooring material including the wood-based flooring with sunlight or operating indoor heating, heat from the sunlight, heating, etc. is input to the surface of the flooring, and the latent heat storage material Encourage heat storage to 17.

  When heat is input to the surface of the wooden flooring 10A by sunlight, heating, or the like, the surface temperature T1 of the wooden flooring and the temperature T2 of the latent heat storage material increase accordingly. Here, first, at time t0, the surface temperature T1 of the wooden floor material reaches the color change temperature Te2 of the second temperature indicating material, and the second temperature indicating material 32 changes color. Furthermore, the surface temperature T1 of the wooden floor material and the temperature T2 of the latent heat storage material rise, and at time t1, the surface temperature T1 of the wooden floor material reaches the discoloration temperature Te1 of the first temperature indicating material, The first temperature indicating material 31 changes color.

  Further, when the surface of the wooden flooring 10A is heated until time tc, the temperature T2 of the latent heat storage material becomes the color change temperature Te3 of the third temperature indicating material at time ts during this period (between times t1 and tc). To reach. At this time, the third temperature indicating material 33 changes color. Since the color change temperature Te3 is the phase change temperature of the latent heat storage agent, the latent heat storage agent starts to melt, and at this stage, the heat storage of the latent heat storage material 17 is started.

  Therefore, when the third temperature indicating material 33 starts to change color in a state where the first and second temperature indicating materials 31 and 32 are discolored, it is possible to determine the start of heat storage in the latent heat storage material 17. . When all of the first, second, and third temperature indicating materials 31, 32, and 33 are discolored (period from time ts to time t2 in the figure), the latent heat storage material 17 is stored. It can be determined with certainty (heat storage state). In this case, it is not necessary to further perform the operation of indoor heating for promoting the heat storage in the latent heat storage material 17.

  The latent heat storage material 17 is radiated at least between time t2 and time t3 '. Here, from time t3 to time t3 ′, the temperature of the latent heat storage material 17 is maintained at a constant temperature as the phase change temperature (color change temperature Te3), and until this time, the temperature of the second temperature indicating material 32 changes color. The temperature is maintained at Te2, and the second temperature indicating material 32 and the third temperature indicating material 33 are maintained in a discolored state.

Accordingly, when the first temperature indicating material 31 is not discolored and the second and third temperature indicating materials 32 and 33 are discolored as in the state from time t2 to t3 ′, the latent heat It can be determined that the heat storage material 17 is radiated (heat radiation state). Further, when the temperature drops and the third temperature indicating material 33 starts to return to the original color at time t3 ′, it is possible to determine the end of heat dissipation. Therefore, even when the second temperature indicating material 32 is discolored from time t3 ′ to time t4, the heat release of the latent heat storage material 17 is completed. In this case, the latent heat storage material 17 By performing the operation of indoor heating for promoting heat storage in the room, it is possible to effectively use heat from sunlight, indoor heating, and the like.
[Third Embodiment (Second Invention)]
FIG. 7 is a cross-sectional view of the wooden floor material 10B according to the third embodiment (second invention) when laid on the floor surface. The point that the wooden flooring of the third embodiment is different from that of the second embodiment is that the second temperature indicating material is not provided on the wooden flooring. Therefore, the same members and portions as those of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  Here, the third temperature indicating material 33 in the present embodiment corresponds to the second temperature indicating material of the second invention. In the present embodiment, the first and third temperature indicating materials 31, 33 The state of the latent heat storage material 17 is determined.

  FIG. 8 shows an example of the temperature profile of the surface temperature T1 of the wooden floor material and the temperature T2 of the latent heat storage material shown in FIG. 7, and the discoloration state of the first and third temperature indicating materials corresponding thereto. It is a graph.

  First, the temperature profile with the passage of time of the surface temperature T1 of the wooden floor material of FIG. 8 and the temperature T2 of the latent heat storage material is substantially the same as that shown in the second embodiment of FIG. The state of discoloration of the first and third temperature indicating materials accompanying the temperature profile will be described. In FIG. 8, the discoloration temperatures Te1 and Te3 of the first and third temperature indicating materials are the same temperature.

  As shown in FIG. 8, before the time t1, the first and third temperature indicating materials 31, 33 are not discolored. In this state, it can be easily determined visually that the latent heat storage material 17 is not storing and releasing heat. Then, by irradiating the surface of the flooring material including the wood-based flooring with sunlight or operating indoor heating, heat from the sunlight, heating, etc. is input to the surface of the flooring, and the latent heat storage material Encourage heat storage to 17.

  When heat is input to the surface of the wooden flooring 10B by sunlight, heating, or the like, the surface temperature T1 of the wooden flooring and the temperature T2 of the latent heat storage material increase accordingly. Here, first, at time t1, the surface temperature T1 of the wooden floor material reaches the color change temperature Te1 of the first temperature indicating material, and the first temperature indicating material 31 changes color. Here, when the first temperature indicating material 31 starts to change color and the third temperature indicating material 33 has not changed color, it is determined that the heat storage of the latent heat storage material 17 may be started as shown below. it can.

  Further, when the surface of the wooden flooring 10 is heated until time tc, the temperature T2 of the latent heat storage material becomes the color change temperature Te3 of the third temperature indicating material at time ts during this time (between times t1 and tc). To reach. At this time, the third temperature indicating material 33 changes color. Since the color change temperature Te3 is the phase change temperature of the latent heat storage agent, the latent heat storage agent starts to melt, and at this stage, the heat storage of the latent heat storage material 17 is started.

  Therefore, when the third temperature indicating material 33 starts to change color with the first temperature indicating material 31 discolored, it is possible to determine the start of heat storage in the latent heat storage material 17. When both the first and third temperature indicating materials 31 and 33 are discolored (period from time ts to time t2 in the figure), it is ensured that the latent heat storage material 17 is stored (heat storage state). Can be judged. In this case, it is not necessary to further perform the operation of indoor heating for promoting the heat storage in the latent heat storage material 17.

  Next, the latent heat storage material 17 is radiated between time t2 and time t3 '. Here, during the period from time t3 to time t3 ′, the temperature T2 of the latent heat storage material is maintained at a constant temperature at the phase change temperature, that is, the color change temperature Te1 (Te3). Until this time, the third temperature indicating material 33 is The discolored state is maintained.

  Therefore, when the first temperature indicating material 33 is not discolored and the third temperature indicating material 33 is discolored as in the state from time t2 to t3 ′, the latent heat storage material 17 is dissipated. It can be determined that the heat is released (heat dissipation state). Further, when the temperature drops and the third temperature indicating material 33 starts to return to the original color at time t3 ', it is possible to determine the end of heat dissipation. Thus, when the heat radiation of the latent heat storage material 17 has been completed, the operation of the indoor heating for promoting the heat storage to the latent heat storage material 17 is performed, so that the heat of sunlight, the indoor heating, etc. is made effective. Can be used.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.

  For example, in the second and third embodiments, the third temperature indicating material disposed on the tip side of the resin material is in contact with the container of the latent heat storage material, but is in contact with the latent heat storage agent itself in the container. In the case where the latent heat storage material is composed only of the latent heat storage agent, the third temperature indicating material is also brought into contact with the latent heat storage agent itself.

  10, 10A, 10B: wood-based flooring, 11: wood-based base material, 11a: front surface, 11b: back surface, 12a: male solid part, 12b: female real part, 15: storage recess, 15a: bottom part, 15b: opening Part, 17: latent heat storage material, 17a: container, 19: through hole, 31: first temperature indicating material, 32: second temperature indicating material, 33: third temperature indicating material, 34: resin material, T1: wood type Floor surface temperature, T2: Temperature of latent heat storage material

Claims (4)

A wood-based flooring comprising at least a wood-based substrate having a storage recess formed on the back surface and a latent heat storage material stored in the storage recess,
On the surface of the wooden floor material, a reversible first temperature indicating material that changes color at the same first color change temperature as the phase change temperature of the latent heat storage material, and a second color change temperature lower than the first color change temperature. A reversible second temperature indicator that changes color, and
From the state in which the first and second temperature indicating materials change color and the latent heat storage material is in a liquid phase, the latent heat storage material undergoes a phase change to a solid phase state.
In the state where the temperature of the latent heat storage material is maintained at the phase change temperature and the color of the first temperature indicating material returns to the original color, the discoloration of the second temperature indicating material is maintained, and the latent heat storage material is fixed. The wood-based flooring material, wherein the second discoloration temperature is set so that the color of the second temperature indicating material returns to the original color after entering the phase state. A wood-based flooring comprising at least a wood-based substrate having a storage recess formed on the back surface and a latent heat storage material stored in the storage recess,
On the surface of the wooden floor material, a reversible first temperature indicating material that changes color at the same first color change temperature as the phase change temperature of the latent heat storage material, and a second color change temperature lower than the first color change temperature. A reversible second temperature indicator that changes color, and
The temperature of the latent heat storage material is maintained at the phase change temperature when the color of the first temperature indicating material returns to the original color and the latent heat storage material changes phase from the liquid phase state to the solid phase state. When the temperature of the latent heat storage material is maintained, the second discoloration temperature is set to a temperature when the temperature of the second temperature indicating material is maintained at a constant temperature lower than the phase change temperature. Wooden flooring characterized by being made.   A through-hole penetrating the storage recess is formed on the surface of the wooden base material, and a transparent resin material or a transparent resin inserted into the through-hole so as to contact the latent heat storage material A glass material is provided, and a third temperature indicating material that changes color at the same temperature as the phase change temperature of the latent heat storage material is disposed at a portion where the resin material or the glass material and the latent heat storage material abut on each other. The wood-based flooring according to claim 1 or 2, wherein A wood-based flooring comprising at least a wood-based substrate having a storage recess formed on the back surface and a latent heat storage material stored in the storage recess,
On the surface of the wooden floor material, a reversible first temperature indicating material that changes color at the same temperature as the phase change temperature of the latent heat storage material is disposed,
A through-hole penetrating the storage recess is formed on the surface of the wooden base material, and a transparent resin material or a transparent resin inserted into the through-hole so as to contact the latent heat storage material A glass material is provided, and a second temperature indicating material that changes color at the same temperature as the phase change temperature of the latent heat storage material is disposed at a portion where the resin material or the glass material and the latent heat storage material are in contact with each other. A wooden flooring that is characterized by

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