JP3180823U - Double insulated house - Google Patents

Abstract

An object of the present invention is to provide a double insulation that efficiently air-conditions two air conditioners by providing a static air layer between the double insulations to reduce indoor temperature change by double wrapping the house with insulation. Provide structural houses.
A house 1 is heat-insulated by a method of wrapping with a heat-insulating material, and a roof 3, an outer wall 2 and a foundation 4 of the house 1 are made of a double heat-insulating material P composed of a surface heat-insulating material P1 and a base heat-insulating material P2. An air layer is formed between the double insulating materials P which are arranged. Further, the outer wall 2 has a gap E, and the space A between the roof and the ceiling of the roof 3 and the space D between the bottom plate and the floor of the foundation 4 are connected to the air conditioners AC1, AC2 and the air conditioner, respectively. The plurality of ducts 16a and 16b are arranged, and either one of the air conditioners is operated depending on the season, and air is blown from the plurality of ducts 16a and 16b so as to be able to be heated and cooled, through the gap space E of the outer wall 2. Air is circulated to air-condition the entire interior.
[Selection] Figure 1

Description

  The present invention is an efficient method that uses the contradictory properties of heat insulation effect or heat transfer effect produced by the air layer formed between the double heat insulation materials, by double wrapping the house with heat insulation materials. It relates to a double-insulated house that performs indoor air conditioning.

  2. Description of the Related Art Conventionally, houses that make a comfortable space by arranging an air conditioner for air conditioning (hereinafter referred to as “air conditioner”) in a thermally insulated house are known. In the case of central heating, a plurality of pipes are connected to an air conditioner outdoor unit that supplies hot and cold water, and hot water and cold water are supplied through pipes arranged according to the room division of the house. A convector (heat radiator) is installed in each room, and warm air and cold air are discharged through the convector for air conditioning.

  In the case of a wooden house, the gap space formed on the wall or ceiling is used as a circulation path for air blown from the air conditioner, and cool air and warm air are circulated by natural convection, making it suitable for living environments with little temperature difference. The room temperature is adjusted.

  For example, according to the idea of the applicant, an air conditioner is arranged in the attic and under the floor of a heat-insulated house, and a comfortable living space using an air conditioner that performs air conditioning by operating one of the air conditioners according to seasonal changes is provided. A house is disclosed (for example, refer to Patent Document 1).

Utility Model Registration No. 3156275

  However, in the case of central heating, there is a problem that the equipment for supplying hot water and cold water becomes large, and the cost is high due to complicated piping and installation of a plurality of convectors.

  In addition, in the case of a house having a comfortable living space using the air conditioner of Patent Document 1, heat insulation treatment with a single heat insulating material does not necessarily have a sufficient heat insulation effect, particularly hot air transmitted from the roof in midsummer to the back of the hut, outer wall And there was a problem that radiant heat such as hot air and cold air transmitted from the concrete of the foundation could not be sufficiently blocked.

  The present invention has been made in view of the above problems, and a double heat insulation structure is made by using a method of wrapping the roof, outer wall and foundation with heat insulating material in a double structure, and using the contradictory characteristics of air, A static air layer is formed between the heat insulating materials to block external heat, and natural convection is generated indoors by the air blown from the two air conditioners, and the heat transfer effect of the flowing air is used for efficiency. An object is to provide a double heat insulation house for indoor air conditioning.

  In order to achieve the above object, the present invention has the following configurations (1) to (5).

  (1) A house that has been heat-insulated by a method of wrapping with a heat-insulating material, and the roof, outer wall, and foundation of the house are provided with a double heat-insulating material composed of a surface heat-insulating material and a base heat-insulating material, and the double heat-insulating material An air layer is formed between the materials, the outer wall further has a gap space, the space between the floor and the ceiling of the roof shed of the roof, and the space between the bottom plate of the foundation and the under floor, Each air conditioner and a plurality of ducts connected to the air conditioner are arranged, and depending on the season, one of the air conditioners is operated to blow air from the plurality of ducts so that the air can be cooled. A double-insulated house characterized in that the whole indoor space is air-conditioned by circulating air through it.

  (2) The house is a two-story building, and the air blown from the air conditioner that is operated so as to be capable of heating and cooling is defined as a space formed between the second-floor floor and the first-floor ceiling. It circulates through, The double heat insulation structure house as described in said (1) characterized by the above-mentioned.

  (3) The double heat insulating material installed on the roof is placed between a base plate and a rafter, and rafters are held in parallel at equal intervals between the surface heat insulating material and the base heat insulating material of the double heat insulating material. The double heat-insulating structure house according to (1) or (2), wherein the house has an arranged space, and is formed so that outside air is taken into the space and air is circulated.

  (4) A space having stationary air is formed on the back of the hut by continuously placing the base heat insulating material installed on the roof. The double heat insulation structure house according to (1) or (2).

  (5) The preceding paragraph, wherein the double heat insulating material installed on the outer wall and the foundation has a space divided by sandwiching a lattice-shaped body edge between the surface heat insulating material and the base heat insulating material. (1) Or the double heat insulation structure house of (2) description.

  In the double heat insulation structure house according to the present invention, a static air layer is formed between the double heat insulation materials to block the heat of the outside air, and two air conditioners are installed indoors according to the seasonal change. By operating either one of the air conditioners and performing air conditioning that circulates cold air or warm air, natural convection of air is generated, and a double heat insulation structure house that efficiently performs indoor air conditioning can be provided.

Sectional drawing explaining the structure and function of the double heat insulation structure house which concerns on this invention Exploded view showing the structure of the outer wall Exploded view showing the structure of the roof Exploded view showing the structure of the second floor ceiling and the back of the shed Exploded view showing the structure of the second floor and the first floor ceiling Exploded view showing the structure of the ground floor and foundation

  Hereinafter, the form for implementing this invention is demonstrated in detail by an Example.

  In the embodiment, a two-story house will be described as an example. However, the house may be a one-story house or a three-story house, and is not limited to a two-story house.

  The arrangement | positioning of the double heat insulating material P installed in the double heat insulation structure house 1 which concerns on this invention, and the structure and function of the double heat insulation structure house 1 are demonstrated using FIG.

  The double heat insulation structure house 1 of the present invention is a two-layer structure in which a roof 3 exposed to the sun, an outer wall 2 and a part of a foundation 4 are laminated with a surface heat insulating material P1 and a base heat insulating material P2 indicated by a two-dot chain line in the figure. The double heat insulating material P is provided with a divided space G that contains stationary air or a ventilation space J through which flowing air passes.

The heat transfer coefficient of air is 4 Kcal / cm ² · h · ° C. in the case of static air, and has a heat transfer characteristic at a maximum of 250 Kcal / cm ² · h · ° C. in the case of flowing air. It is known that still air and flowing air exhibit exactly the opposite characteristics. The double heat insulation structure house 1 of the present invention is a house that effectively and effectively utilizes the contradictory characteristics of air.

  Moreover, the heat insulating material P used for the double heat insulating structure house 1 is an aluminum heat shielding material in which aluminum is welded or vapor-deposited on both surfaces of the heat insulating material. In particular, it is a heat insulating material P having a heat reflecting function, and for example, a heat insulating sheet such as Astrofoil (registered trademark) or Reflectics (registered trademark) is used in a doubled manner.

Astrofoil (registered trademark) has a passing heat amount of 42 to 46 w / m ² in a heat shielding test (irradiation heat amount 1000 w) carried out by placing it under a roof tile or a slate, and there is no heat shielding material. Compared to 65 to 87 w / m ² of the passing heat amount in the case, it has a heat shielding capacity of about 20 to 40 w / m ² or more, and Reflectics (registered trademark) has the same performance.

  In the double heat insulation structure house 1 of the present invention, a cooling air conditioner AC1 is installed in the space B behind the second floor, and a plurality of flexible cooling ducts 16a are connected to blow cool air C in an arbitrary direction. Yes. A heating air conditioner AC2 is also installed in the space D under the first floor, and a plurality of ducts 16b for blowing the warm air H are connected thereto.

  The structure of a normal house is characterized by natural convection in which air naturally flows through the gaps and spaces because many gaps and spaces are formed inside the ceiling, walls, and floor. Therefore, in the double heat insulation house 1, the air conditioner AC1 for cooling and the air conditioner AC2 for heating are operated according to the change of the season, thereby effectively utilizing the high heat transfer function of the flowing air. Air conditioning is performed by circulating cold air C or warm air H indoors through a gap space E formed by the beam 5, the column 7, and the base 8 of the outer wall 2. The circulation of the cool air C and the warm air H will be described later with reference to FIG.

<Structure of double insulated house>
Next, the structure of the outer wall 2, the roof 3, the foundation 4 and the like constituting the double heat insulation structure house 1 of the present invention and the double heat insulation structure will be described below.

[Outer wall structure]
FIG. 2 shows the structure of the main part of the outer wall 2 of the double heat insulating structure house. For example, an outer wall material 21 such as a ras mortar-coated jolipat finish is used on the surface in contact with the outside, the outer wall material 21 is bonded to a structural plywood 22, and a surface heat insulating material P 1 constituting a double heat insulating material P is formed inside thereof. And the base heat insulating material P2 are fixed to the beam 5, the column 7, and the inter-column 7a with the frame edge 20 sandwiched therebetween. Moreover, the structure of the inner wall material 23 on the indoor side of the beam 5 and the column 7 is formed of a gypsum board 23a and an inner wall finishing material 23b.

  The double heat insulating material P in which the body rim 20 is sandwiched between the surface heat insulating material P1 and the base heat insulating material P2 includes a stationary air layer in the divided space G subdivided by the body rim 20 having a lattice structure. Prevents air convection in P and enhances the heat insulation effect.

  In addition, the gap space E formed between the beam 5 and the pillar 7 and the base 8 of the outer wall 2 serves as an air passage that secures heat circulation between each room of the house and between the first floor and the second floor. By generating natural convection that reduces the temperature difference between the places through the space E, the heat transfer effect by the flowing air that transmits the cool air C and the warm air H stored in the air is exhibited.

[Roof structure]
FIG. 3 shows the structure of the roof 3 of the double heat insulating structure house.

  The roof 3 of the double heat insulation structure house is made of a double heat insulation material P on the plurality of rafters 11 that are obliquely passed between the purlin 6 and the beam 5 at an equal interval in a roof set built in a truss structure. On the upper surface, a base plate 25, a roofing 26 for waterproofing treatment, and a roof finishing material 27 such as a slate or a tile are installed.

  The double heat insulating material P is composed of a surface heat insulating material P1 and a base heat insulating material P2, and a base heat insulating material P2 having a narrow width is laid on the rafter 11, and a control rafter 11a arranged at equal intervals is sandwiched between the surface heat insulating materials. It has a structure in which P1 is placed. In particular, the surface heat insulating material P1 is laid down to the end of the rafter 11 and is installed so as to cover the entire roof, and one base heat insulating material P2 is sized to cover the junction between the rafter 11 and the beam 5, and the surface heat insulating material P1. And the base heat insulating material P2.

  The joint between the rafter 11 under the eaves and the beam 5 is the height of the holding rafter 11a and the size of the installation width, and a plurality of openings 11b are formed between the surface heat insulating material P1 of the double heat insulating material P and the base heat insulating material P2. The outside air W is taken in from the opening 11b. The ventilation space J separated by the plurality of restraining rafters 11a arranged in parallel between the double heat insulating materials P prevents the diffusion of heat to the entire roof by preventing the convection of air between the separated spaces. It is out.

  Further, in the ventilation space J arranged in parallel from the beam 5 toward the purlin 6, natural outdoor air W blowing outdoors is provided from a plurality of openings 11 b between the surface heat insulating material P <b> 1 and the base heat insulating material P <b> 2 below the eaves. By taking in, the heat stagnating in the space partitioned by the control rafter 11a is ventilated with natural outside air W, and the heat is prevented from stagnating in the space between the double heat insulating materials P.

[Second-floor ceiling and shed structure]
FIG. 4 shows the structure of the second-floor ceiling 14 and the floor 12 at the back of the hut of the double heat-insulated structure house 1.

  The structure of the back of the ceiling on the second floor is that the beam 5 is inserted into the beam 5 and the joist 9 is assembled to make the joist 9 and the beam 5 the same height, and a structural plywood is attached to the upper surface to form the floor 12 of the shed. Further, a base heat insulating material P2 is placed so as to cover the entire floor 12 of the shed. As shown in FIG. 1, at the joint between the rafter 11 of the roof 3 and the beam 5, the base heat insulating material P <b> 2 at the back of the hut is connected to the base heat insulating material P <b> 2 of the roof 3 without a gap and is also connected to the heat insulating material P of the outer wall 2. ing. Therefore, the space A in the attic is sealed so that the base heat insulating material P2 of the roof 3 continuously covers the entire surface of the floor 12 in the attic, and the air layer confined in the space A in the attic is kept stationary. Insulating effect.

  Further, the structure of the second-floor ceiling 14 is such that a structural plywood 14a and a decorative fireproof board 14b are attached to a field edge 19 fixed to a plurality of hanging trees 10 attached to the joists 9. Therefore, a space B behind the second floor ceiling is formed between the floor 12 of the shed and the second floor ceiling 14 supported by the hanging tree 10.

  In the space B on the second floor ceiling, a part of the structural plywood on the floor 12 of the shed is cut out and a cooling air conditioner AC1 is installed. The upper part of the cooling air conditioner AC1 protruding from the back of the hut is covered with a detachable box 12a formed of the same structural plywood as the flooring material, and the entire surface of the protruding box 12a covers the entire surface of the floor 12 of the shed. Covered with P2, the space A behind the hut is separated from the air conditioner AC1 for cooling and the space B behind the second floor ceiling. Maintenance and inspection work such as filter replacement of the cooling air conditioner AC1 can be performed from the back of the hut with the box 12a removed.

  The plurality of cooling ducts 16a connected to the cooling air conditioner AC1 are piped on the upper surface of the structural plywood 14a of the second-floor ceiling 14 fixed to the hanging tree 10, and the cool air C blown from the cooling duct 16a is behind the second-floor ceiling. The entire space B is cooled. Since the cold air C diffused into the space B behind the second floor ceiling has a high specific gravity, it falls to the entire indoor space through the clearance space E of the outer wall 2 due to natural convection of air, and air circulation accompanied by rising hot air indoors As a result, the cold air C is diffused to every corner of the room.

[Structure of second floor and first floor ceiling]
FIG. 5 shows the structure of the second-floor floor 15 and the first-floor ceiling 17 of the double heat-insulated house 1.

  As for the structure of the second floor 15, a joist 9 is arranged on the beam 5, and a structural plywood 15 a, a fireproof boat 15 b and a floor material 15 c are attached to the upper surface of the joist 9 to form the second floor 15. Similarly to the second-floor ceiling 14, the first-floor ceiling 17 has a ceiling base structure plywood 17a and a decorative fireproof board 17b attached to a field edge 19 of a frame structure fixed to a plurality of suspension trees 10 attached to the joists 9. . Therefore, a space F behind the first floor ceiling is formed between the second floor 15 and the first floor ceiling 17.

  The cool air C or the warm air H that has flowed from the gap space E of the outer wall 2 propagates through the space F behind the first floor ceiling. The cool air C that spreads in the space F behind the first floor ceiling descends from the first floor ceiling 17, or the warm air H rises from the second floor 15, and heat circulation occurs during cooling or heating and diffuses into the room.

[Basic structure]
FIG. 6 shows the structure of the foundation 4 and the first floor 18 of the double heat-insulated house 1.

  The base 8 placed on the rising 4a of the foundation 4 of the solid foundation structure is fixed to the upper surface of the rising 4a while being covered with the surface heat insulating material P1 of the double heat insulating material P of the outer wall 2 and the base heat insulating material P2. The A joist 9 is arranged on the covered base 8, and a structural plywood 18 b and a floor material 18 c are attached to the upper surface of the joist 9 to form a first floor 18. The joists 9 arranged on the base 8 are supported by a plurality of metal bundles 13 fixed to the bottom plate 4 b of the foundation 4. Therefore, a space D under the first floor is formed between the bottom plate 4 b and the first floor 18.

The entire inner surface of the rising edge 4a of the foundation 4 and the upper surface of the concrete-clad bottom plate 4b are covered with the base heat insulating material P1 to separate the space D under the first floor from the foundation 4. In particular,
In the solid foundation structure of the double heat insulation structure house 1, the laminated portion K in which the heat insulating material is stacked is formed on the inner side of the rising edge 4 a of the foundation 4 on which the base 8 is installed and the bottom plate 4 b in the range of about 1 m from the rising edge 4 a. Has been. By making the laminated portion K into a double heat insulating material P in which the surface heat insulating material P1 and the base heat insulating material P2 are overlapped, the heat transfer from the rising 4a of the foundation 4 exposed to the outside air is prevented, and the space D under the first floor Prevents temperature changes. Note that the width of the laminated portion K is not limited to 1 m because it varies depending on the specifications.

  In the space D under the first floor, a heating air conditioner AC2 is installed on a base 8 or a joist 9 in a state of being suspended by a fixing bracket 24 such as a bolt. Therefore, the foundation 4 under the heating air conditioner AC2 is formed with an inspection groove 4c that is waterproofed and covered with the base heat insulating material P2, and an operator enters the inspection groove 4c to enter the heating air conditioner AC2. Maintenance inspection work such as filter replacement and cleaning can be performed.

  The heating air conditioner AC2 installed in the space D under the first floor is connected to a plurality of heating ducts 16b, piped on the upper surface of the bottom plate 4b covered with the base heat insulating material P2, and blown from the heating duct 16b. The warm air H heats the entire space D under the first floor and is discharged from the outlet 18a formed in the first floor 18 into the first floor room. In addition, since a fire-resistant boat having a heat insulating function is not inserted in the first floor 18, the space D under the first floor is warmed, so that the entire first floor 18 is also warmed and the effect of floor heating is exhibited. .

<Characteristics of double insulated house>
The feature of the double heat insulation structure house 1 of the present invention is a house for effectively and effectively using the contradictory characteristics of air relating to heat transfer characteristics.

  Therefore, as the double heat insulating material P, an aluminum heat shielding material in which aluminum is deposited or vapor-deposited on both surfaces of the heat insulating material is used for the surface heat insulating material P1 and the base heat insulating material P2, and further between the surface heat insulating material P1 and the base heat insulating material P2. It has a structure in which an air layer is formed.

  In the double heat insulating structure house 1 of the present invention, the first purpose of double the heat insulating material is synergy between the double heat insulating material and the heat insulating function of the stationary air layer formed between the heat insulating materials. The effect is to further enhance the heat insulation function.

  As shown in FIG. 2, the structure of the outer wall 2 forms a divided space G by disposing a body edge 20 assembled in a lattice shape between the surface heat insulating material P1 of the double heat insulating material P and the base heat insulating material P2. A stationary air layer that prevents air convection between the heat insulating materials P is formed.

  Further, as shown in FIG. 3, the heat insulating structure of the roof 3 exposed to the sun draws natural outside air W into the ventilation space J between the double heat insulating materials P to perform heat ventilation, and further, the space in the back of the hut. It has a heat insulating structure that combines the contradictory characteristics of air, in which A is sealed with a base heat insulating material P2 to form a heat insulating space by including a stationary air layer.

  In the double heat insulation structure house 1 of the present invention, the second purpose is to double the heat insulating material. The indoor space separated from the outside air is used for the air generated by natural convection by using air with cold air C or warm air H. It is to generate a circulation.

  In the double heat insulation structure house 1, by using the gap space E of the outer wall 2 as a passage through which air blown from two air conditioners circulates, heat is transferred by natural convection and each room or first floor of the house The temperature difference between the second floor is reduced.

  Since the air has a specific gravity due to the cold air C or the warm air H, the air having the cold air C is lowered due to the difference in specific gravity, and the air having the warm air H is raised. As a result, circulation of flowing air having a high heat transfer effect occurs, and indoor air conditioning can be efficiently performed.

  Furthermore, the wooden house has many gaps formed in the internal structure of the ceiling, walls, and floor, so that natural convection is generated so that air with cold air C or warm air H circulates through the gap space E. be able to.

<Cyclic and warm air circulation>
The circulation of the cool air C and the warm air H will be described below with reference to FIG.

  As shown in FIG. 1, the cooling air C is circulated by operating a cooling air conditioner AC1 installed in a space B behind the second floor, and discharging the cooling air C from a plurality of cooling ducts 16a connected to the cooling air conditioner AC1. Is generated.

  The air charged with the cool air C having a heavy specific gravity cools the entire space B behind the second floor ceiling, and the cool air C descends into the second floor room to generate natural convection. Further, the air charged with the cold air C propagates through the gap space E formed by the beam 5 and the column 7 of the outer wall 2 and diffuses to the entire space F behind the first floor ceiling. In the first-floor room, the first-floor ceiling 17 is cooled and the cold air C having a heavy specific gravity is lowered, and air convection is generated in the first-floor room. Further, the air with the cold air C propagates through the gap space E of the outer wall 2 and spreads into the space D under the first floor, so that the whole heat-insulated indoor space is cooled by the circulation of the air with the cold air C.

  Next, the warm air H is circulated by operating the heating air conditioner AC2 installed in the space D under the first floor as shown in FIG. 1 and releasing the warm air H from the plurality of connected heating ducts 16b. Occurs.

  The warm air H discharged from the heating duct 16b piped on the upper surface of the bottom plate 4b covered with the base heat insulating material P2 heats the entire space D under the first floor, and the outlet formed in the first floor 18. Warm air H is discharged into the first floor room from 18a. The first floor 18 is also warmed by the space D under the first floor, so that the entire floor is warmed and exhibits the effect of floor heating, and the warm air H rises from the floor.

  In the first floor room, convection of air is generated in the first floor room as the air with warm air H having a low specific gravity rises. The air with warm air H rises from the space D under the first floor floor through the gap space E between the base 8 and the pillar 7 of the outer wall 2 and spreads over the entire inside of the outer wall 2.

  The warm air H that has risen in the gap space E propagates in the space F behind the first floor ceiling, warms the second floor 15, the warm air H also rises from the floor surface of the second floor, generates convection in the second floor room, and the warm air H spreads. Go. Further, the warm air H that has risen in the gap space E of the outer wall 2 spreads in the space B behind the second floor ceiling, so that the entire heat-insulated indoor space is heated by the circulation of the warm air H.

  As described above, the double heat insulation structure house of the present invention effectively uses the high heat transfer function of the flowing air by generating air circulation in the heat-insulated indoors. One of the air conditioners can be operated in accordance with a change in season, and the generated cold air or warm air can be circulated for air conditioning.

AC1 Air conditioner for cooling AC2 Air conditioner for heating A Space in the back of the hut B Space behind the second floor ceiling C Cool air D Space under the first floor E Clearance space F Space behind the first floor ceiling G Divided space H Warm air J Ventilation space K Laminating part P Two Heavy heat insulating material P1 Surface heat insulating material P2 Ground heat insulating material W Outside air 1 Double heat insulating structure house 2 Outer wall 3 Roof 4 Foundation 5 Beam 6 Purlin 7 Pillar 8 Base 9 joist 10 Suspension tree 11 Rafter tree 12 Back floor 13 Bundle 14 Second floor ceiling 15 Second-floor floor 16 Duct 17 First-floor ceiling 18 First-floor floor 19 Field edge 20 Trunk edge 21 Exterior wall finishing material 22 Structural plywood 23 Inner wall material 24 Fixing bracket

Claims (5)

A house that has been heat-insulated by a method of wrapping with heat-insulating material,
The roof, outer wall and foundation of the house are provided with a double heat insulating material consisting of a surface heat insulating material and a base heat insulating material, and an air layer is formed between the double heat insulating materials,
Furthermore, the outer wall has a gap space,
An air conditioner and a plurality of ducts connected to the air conditioner are disposed in the space between the floor and the ceiling of the roof shed of the roof and the space between the bottom plate of the foundation and the floor, respectively.
Depending on the season, one of the air conditioners is operated to blow air from the plurality of ducts so that the air can be heated and cooled, whereby air is circulated through the gap space of the outer wall to air-condition the entire interior. And a double insulated house.   The house is a two-story building, and the air blown from the air conditioner that is operated is circulated through the space formed between the second-floor floor and the first-floor ceiling through the space between the outer walls. The double heat insulating structure house according to claim 1.   The double heat insulating material installed on the roof is placed between a field board and a rafter, and rafters are arranged in parallel between the surface heat insulating material and the base heat insulating material of the double heat insulating material at equal intervals. 3. The double-insulated structure house according to claim 1, wherein the house has a space and is formed so that outside air is taken into the space and air is circulated.   2. A space having air that is stationary in the attic is formed on the floor of the attic by continuously placing the base heat insulating material installed on the roof. Or the double heat insulation structure house of Claim 2.   The said double heat insulating material installed in the said outer wall and the said foundation has the space divided | segmented on both sides of the lattice-shaped trunk edge between the said surface layer heat insulating material and the foundation | substrate heat insulating material. The double heat insulation structure house of Claim 2.

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