KR20090090925A - Floor construction structure of building - Google Patents

Abstract

A floor construction structure of building is provided to prevent noise transfer to the lower floor by reducing a noise through an air flow space and a side air flow path. A floor construction structure of building comprises a floor structure(10), an air flow space(F1), a side air flow path(F2), and a flow path formation member(30). The air flow space is formed on a floor structure. The side air flow path connects the air flow space to a noise source. The flow path formation member is installed on a wall(W) to form the side air flow path.

Description

Floor construction structure of building {FLOOR CONSTRUCTION STRUCTURE OF BUILDING}

The present invention relates to a floor construction structure of a building, and more particularly, to a floor construction structure of a building having excellent sound insulation between floors by effectively absorbing and dispersing (exhausted) noise generated in an upper floor.

In general, multi-storey buildings such as multi-family houses or apartments are divided by walls and slabs to have a multi-layered structure, and at the same time, several living spaces are provided on one floor. In such a multi-story building, the noise and vibration applied from the upper floor, especially the impact caused by the severe fluctuations of the children in the apartment, etc., severely damage the occupants living in the lower floor. Accordingly, in constructing a floor of a multi-layered building, it may be necessary to install an interlayer sound insulation material for exhausting noise and vibration.

In general, in the construction of floors of multi-layered buildings, sound insulation materials such as rubber sheets and synthetic resin foams are installed on the slabs, or air circulation spaces (air layers) are formed on the slabs for interlayer insulation. It is.

For example, Korean Patent No. 166993 (Patent Document 1) discloses a method for constructing a shock-absorbing floor structure in which a rubber material is laid on a floor-based slab and a polyethylene (PE) foam sponge is formed thereon to form a barrier layer. . In addition, Korean Patent Laid-Open Publication No. 10-2006-0038862 (Patent Document 2), which can be used as an interlayer noise prevention material (sound insulation) of a building, has a foaming ratio of 5 to 200 times, and foams having a diameter of 10 to 3,000 μm. Thermoplastic flame retardant foams with cells are shown.

In addition, the Republic of Korea Patent No. 786807 (Patent Document 3) is installed on the slab, a bone-like synthetic resin plate is installed, the ondol floor structure is presented so that the impact sound is exhausted through the air pocket formed by the bone-shaped synthetic resin plate, Korean Patent Laid-Open No. 10-2005-0090167 (Patent Document 4) discloses an interlayer sound insulation floor structure in which a sound insulation space is formed on a slab through a panel mounting stand. In addition, Japanese Patent Laid-Open No. P2002-4456 (Patent Document 5) discloses a soundproof panel in which a plurality of independent spaces and holes communicating with each other are formed therein, and Japanese Patent Application Laid-Open No. P2002-70199 (Patent Documents) 6 shows a soundproof panel having a multi-layer structure having a surface finish, a substrate, and a vibration damper, but having an air circulation space in the surface finish or the substrate.

In achieving interlayer insulation, it may be advantageous to form an air circulation space (air layer) as in the above-described prior patent documents 3 to 6 rather than the case of providing a rubber material or a synthetic resin foam. However, there is a problem in that the air distribution space (air layer) alone does not effectively block the noise and vibration (hereinafter, 'noise and vibration' abbreviated as "noise") applied to the upper layer due to the insignificant difference in sound.

[Patent Document 1] Republic of Korea Patent No. 166993

[Patent Document 2] Republic of Korea Patent Publication No. 10-2006-0038862

[Patent Document 3] Republic of Korea Patent No. 786807

[Patent Document 4] Republic of Korea Patent Publication No. 10-2005-0090167

[Patent Document 5] Japanese Laid-Open Patent P2002-4456

[Patent Document 6] Japanese Laid-Open Patent P2002-70199

The present invention is to solve the problems of the prior art as described above, to form an air distribution space on the floor structure, in addition to the side air flow path that communicates the air distribution space and the source of noise generation (that is, the upper layer) It is an object of the present invention to provide a floor construction structure of a building having excellent interlayer sound insulation.

The present invention to achieve the above object,

Floor structure;

An air circulation space formed on the bottom structure;

A side air passage communicating the air circulation space with the noise generating source (upper layer); And

It is provided on the wall, and provides a floor construction structure of the building comprising a flow path forming member for forming the side air flow path.

The air circulation space may be formed by a space forming member provided on the floor structure, and / or by a flow path groove provided in the floor structure (concrete foundation slab, etc.). At this time, the space forming member is composed of a bone formed, or a plate-shaped base portion; And it may be configured to include a support for supporting the base portion of the plate.

The side air flow path communicates an air circulation space with a noise generating source (that is, an upper floor of a building), and the side air flow path is formed by a flow path forming member provided in close contact with a wall. In this case, the flow path forming member may include a base plate part and a plurality of flow path forming parts coupled to the base plate part at predetermined intervals.

According to the present invention, there is an air circulation space formed on the floor structure, in addition, a side air flow path is formed in communication with the air circulation space and the noise generating source (that is, the upper floor of the building), so that the noise generated in the upper floor is It is first exhausted through the air circulation space, and then secondly exhausted through the side air flow path, and then passes through the side air flow path to return to the source of noise generation (upper floor) and exhausted third. As a result, noise transmission to the lower layer is blocked, thereby providing excellent interlayer sound insulation.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail. The accompanying drawings show exemplary embodiments of the present invention, which are provided merely to illustrate the present invention in detail, and thus the technical scope of the present invention is not limited thereto.

1 is a partial perspective view of a floor construction structure according to a first aspect of the present invention, and FIG. 2 is a cross-sectional view of main parts of the floor construction structure according to the first aspect of the present invention. 3 and 4 are perspective views showing an embodiment of the space forming member 20 used in the present invention, and FIGS. 5 and 6 show an embodiment of the flow path forming member 30 used in the present invention. Perspective view.

First, referring to FIGS. 1 and 2, the floor construction structure according to the present invention is a sound insulation structure for interlayer sound insulation, an air distribution space F1 formed on the floor structure 10, and the air distribution space ( And a side air flow path F2 in communication with F1). At this time, the side air flow path (F2) is in communication with the source of noise generation, that is, the upper floor of the building. In the present invention, the floor structure 10 may be composed of a concrete foundation slab (S), or may be a structure in which a separate building material (eg, insulation or wood plywood) is laminated to the concrete foundation slab (S). 1 and 2 illustrate the floor structure 10 is composed of a concrete foundation slab (S).

The air circulation space F1 is a space formed in the horizontal direction (in the xy plane direction in FIG. 1) on the floor structure 10, and this air distribution space F1 is a floor structure according to an exemplary embodiment of the present invention. It may be formed by the space forming member 20 provided on the (10).

The space forming member 20 is included in the present invention as long as it can form an air distribution space F1. For example, the space forming member 20 may include a plate-shaped base portion 22 and a support portion 24 for supporting the plate-shaped base portion 22 as shown in FIGS. 1 and 2. Can be. At this time, the base part 22 is spaced apart from the bottom structure 10 by the support part 24, and an air circulation space F1 is formed between the base part 22 and the bottom structure 10. The base part 22 and the support part 24 constituting the space forming member 20 may be integrally molded, or may be separately molded and then combined. In addition, the space forming member 20 is interposed between the two base portion 22 and the two base portion 22 to separate the two base portion 22 to form an air circulation space F1. It may be configured to include a support 24 to form. In addition, the space forming member 20 may include a heat insulating material or a sound insulating material having a plate shape or a sheet shape. Specifically, the space forming member 20 includes a plate-shaped base portion 22 and the support portion 24 for supporting the plate-shaped base portion 22, the heat insulating material or sound insulating material which is installed on the floor structure 10 side It may be configured to include more. That is, the plate-shaped base part 22; Insulation (or sound insulation); And a support part 24 interposed between the plate-shaped base part 22 and the heat insulating material (or the sound insulating material) to separate the base part 22 from the heat insulating material (or the sound insulating material) to form an air circulation space F1. Can be configured. At this time, the heat insulating material and the sound insulating material is a synthetic resin foam (for example, polystyrene foam, polyurethane foam, polyethylene foam, polypropylene foam, etc.), glass wool, mineral wool, rock wool, fiber aggregate (cotton, etc.) in the material, Nonwoven fabrics (manufactured from natural fibers or synthetic fibers) and the like can be usefully used.

In addition, the space forming member 20 may have a structure in which bone is formed according to another embodiment of the present invention. This will be described with reference to FIGS. 3 and 4.

First, referring to FIG. 3, the space forming member 20 may have a structure in which a valley 25 is formed in a plate-shaped body. In this case, referring to FIG. 3, the valleys 25 may be formed in a groove shape in the x direction, the y direction, the diagonal direction (diagonal direction), or two or more directions selected from them (eg, the xy direction). have. 3 illustrates that formed in the y direction. In addition, the space forming member 20 is a molded body in which the valleys 25 are formed, and may have a structure such as an egg plate. According to a more specific embodiment of the present invention, the space forming member 20 is bent frame 25 is formed as shown in Figure 4, the bone 25 is formed, but the bottom plate (butting the bottom structure 10 ( 28 and the upper plate 29 contacting the building material (for example, heat insulating material, wood plywood, etc.) stacked on the upper portion of the space forming member 20 may have a zigzag structure. In this way, in the case where the valley 25 is formed as the space forming member 20, the valley 25 becomes the air circulation space F1. In addition, in the case where the frame 26 has a bent shape as shown in FIG. 4 as the space forming member 20, an empty space is provided between the frame 26 and the frame 26 as well as the air 25. The circulation space F1 is formed wide.

The size (horizontal length, vertical length and height) of the space forming member 20 is not limited, and the space forming member 20 may be arranged or installed on the floor structure 10. In addition, the space forming member 20 may be selected from wood, ceramic materials, metal materials, rubber materials and synthetic resin materials, but is not particularly limited in its material, and preferably has sound insulation itself. The material (sound insulation) is good. Specifically, the space forming member 20 is a rubber material; Synthetic resin foams such as polystyrene (PS) foam, polyurethane (PU) foam, polyethylene (PE) foam, polypropylene (PP) foam, ethylene vinyl acetate (EVA) foam, polyvinyl chloride (PVC) foam; Wood powder compacts that are compressed and molded by mixing wood flour such as sawdust with a binder; Stone powder, perlite, foamed perlite, vermiculite, expanded vermiculite particles and the like may be selected from a porous ceramic formed by pressing and molding by mixing with a binder.

Further, the side air flow path F2 is a noise blocking flow path formed in a vertical direction (z direction in FIG. 1) on the side of the floor, that is, on the wall W side, and this side air flow path F2 is an air flow space F1. ) And the source of noise generation (i.e. the upper floor of the building). The side air flow path (F2) is formed by the flow path forming member 30 in close contact with the wall (W).

The flow path forming member 30 may have any structure as long as it can form the side air flow path F2. For example, the flow path forming member 30 may include a base plate part 32 as shown in FIGS. 1 and 2, according to a preferred embodiment of the present invention; And a plurality of flow path forming parts 34 coupled to one surface of the base plate part 32 at predetermined intervals.

Referring to Figure 2, the floor construction structure according to the present invention may include a lightweight foam concrete layer 50 and mortar plastering layer 60, wherein the base plate portion 32 is the lightweight foam concrete or When placing mortar, they flow into the side air flow path F2 and block the filling of the flow path F2. In addition, the flow path forming part 34 may have a bar shape or a protrusion shape as illustrated in FIG. 1 (see FIG. 1), but is not limited thereto. ) Is included in the present invention as long as the base plate portion 32 can be spaced apart from the wall W to form the side air flow path F2 between the base plate portion 32 and the wall W. FIG. The base plate part 32 and the flow path forming part 34 constituting the flow path forming member 30 may be integrally molded, or may be separately molded and then combined.

As described above, the flow path forming member 34 is included in the present invention if the side air flow path F2 can be formed by securing a space (hole or the like) through which air can flow in the vertical direction (z direction in FIG. 1). . For example, the flow path forming member 30 may be formed with a groove formed in a vertical direction on the base plate portion 32. At this time, the groove is a side air flow path (F2). In addition, the flow path forming member 30 may have two base plate portions 32. Specifically, the flow path forming member 30, as shown in Figure 5, the first base plate portion (32-1); Second base plate portion 32-2; And interposed between the first base plate portion 32-1 and the second base plate portion 32-2, and separating the two base plate portions 32-1 and 32-2 therebetween. It may be configured to include a plurality of flow path forming portion 34 to form a space (30a) in. At this time, the space 30a becomes the side air flow path F2.

The size of the flow path forming member 30 is not limited, and may be arranged on the side (edge) of the bottom, one or more arranged at the bottom of the wall (W). In addition, the flow path forming member 30 may be selected from wood, ceramic materials, metal materials, rubber materials, synthetic resin materials, and the like, but is not particularly limited in the material. It is good to have a sound insulation material itself (sound insulation material). Specifically, the flow path forming member 30 is a rubber material; Synthetic resin foams such as polystyrene (PS) foam, polyurethane (PU) foam, polyethylene (PE) foam, polypropylene (PP) foam, ethylene vinyl acetate (EVA) foam, and polyvinyl chloride (PVC) foam; Wood powder compacts that are compressed and molded by mixing wood flour such as sawdust with a binder; Stone powder, perlite, foamed perlite, vermiculite, expanded vermiculite particles and the like may be selected from a porous ceramic formed by pressing and molding by mixing with a binder.

In addition, referring to Figure 6, the flow path forming member 30, as described above, the first base plate portion (32-1); Second base plate portion 32-2; A flow path forming portion 34 interposed between the first base plate portion 32-1 and the second base plate portion 32-2 to separate the two base plate portions 32-1 and 32-2. It includes, but may further comprise a heat insulating material 36 bonded to any one selected from the first base plate portion 32-1 and the second base plate portion 32-2. In FIG. 6, the heat insulating material 36 is bonded to the second base plate part 32-2. At this time, the heat insulating material 36 is installed to be in close contact with the wall (W), by this heat insulating material 36 it is possible to ensure the heat insulating property in the bottom side (that is, the bottom of the wall (W)). The insulating material 36 has a plate shape or sheet shape, and in the material thereof, a synthetic resin foam (for example, polystyrene foam, polyurethane foam, polyethylene foam, polypropylene foam, etc.), glass wool, mineral wool, Rock wool, fiber aggregates (cotton, etc.) can be usefully used. In addition, as the heat insulating material 36, a nonwoven fabric made from natural fibers or synthetic fibers may be used.

Floor construction structure according to the present invention is a sound insulating structure as described above the air circulation space (F1); And it is included in the present invention if the side air flow path (F2) formed in communication with the air circulation space (F1) is formed. And the floor construction structure according to the present invention, as usual, may have a heat insulating material layer 40, lightweight foam concrete layer 50, mortar plastering layer 60 and the like.

2 is a floor construction structure according to the first aspect of the present invention, referring to FIG. 2, the floor construction structure according to the present invention may include, for example, a floor structure 10; A space forming member 20 installed on the bottom structure 10; A heat insulation layer 40 disposed on the space forming member 20; Lightweight foamed concrete layer (50) poured on the insulation layer 40; And it may include a mortar plastering layer 60 formed on the lightweight foam concrete layer (50). At this time, according to the present invention, the air circulation space (F1) is formed by the space forming member 20, the flow path forming member 30 is installed on the side of the bottom, that is, the wall (W) is a side air flow path ( F2) is formed. And as usual, the mortar plastering layer 60 may have a structure in which a heating pipe line (P) is embedded. In addition, on the mortar plastering layer 60, a flooring material 70 such as a floor plate or a tile may be stacked. At this time, in laminating the flooring 70, it is preferable that the end 71 of the flooring material 70 be laminated so that the side air flow path F2 is not covered. In addition, as shown in Figure 2, at the edge may be installed a closing cover 80 commonly used as a baseboard. At this time, when installing the closing cover 80, it is preferable not to cover the side air flow path (F2), such a closing cover 80 is coupled to the wall (W) through an adhesive or a fixture (screws, nails, etc.). Can be.

In addition, although the floor structure 10 is composed of a concrete foundation slab (S) in FIG. 2, the space forming member 20 is installed on the concrete foundation slab (S), but according to another embodiment of the present invention The heat insulating material layer 40 is installed on the concrete foundation slab (S), and may have a laminated structure in which the space forming member 20 is installed on the heat insulating material layer 40. In addition, the heat insulating material layer 40 may have a structure installed on both upper and lower portions of the space forming member 20. In addition, the floor construction structure according to the present invention may have a structure in which the sound insulation layer, the ocher layer is further provided as usual. In this case, the sound insulation material layer may be installed on the lower and / or the upper portion of the space forming member (20). In addition, the ocher layer may be installed on the lower and / or top of the mortar finishing layer 60, or may replace the mortar finishing layer 60. The insulation layer 40 and the sound insulation layer are synthetic resin foam (for example, polystyrene foam, polyurethane foam, polyethylene foam, polypropylene foam, etc.), glass wool, mineral wool, rock wool, fiber aggregate (cotton, etc.), nonwoven fabric (Manufactured from natural fibers or synthetic fibers) and the like can be usefully used.

7 is a partial perspective view of the floor construction structure according to the second aspect of the present invention, and FIG. 8 is a cross-sectional view of main parts of the floor construction structure according to the second aspect of the present invention.

First, referring to FIG. 7, according to the second aspect of the present invention, in forming the air distribution space F1, the flow path grooves 12 may be formed and formed in the bottom structure 10 itself. have. That is, the flow path groove 12 provided in the bottom structure 10 becomes the air circulation space F1. Specifically, according to the second aspect of the present invention, in forming the air circulation space F1, the floor structure 10 itself is not dependent on the space forming member 20 as in the first aspect shown in FIG. The flow path groove 12 may be provided in the air flow path 12 so that the flow path groove 12 becomes the air circulation space F1.

For example, the flow path groove 12 may be provided by compressing a pipe or lumber on the surface of the concrete foundation slab S before the concrete is hardened in the process of curing and curing, that is, the surface of the uncured slab S. Can be. These flow path grooves 12 are in the x direction, the y direction, the diagonal direction (diagonal direction) or two or more directions selected from them (for example, the xy direction) on the surface of the floor structure 10, that is, the concrete foam slab S. It may be provided, preferably provided in the xy direction may have a grid (grille) shape. In FIG. 7, only one provided in the x direction is illustrated.

8 is a floor construction structure according to the second aspect of the present invention. Referring to FIG. 8, the floor construction structure according to the present invention may include, for example, a floor structure 10; A horizontally held wood plywood 92 installed on the floor structure 10; A sound insulation layer 94 disposed on the wood plywood 92; A heat insulating material layer 40 disposed on the sound insulation material layer 94; Lightweight foamed concrete layer (50) poured on the insulation layer 40; And it may include a mortar plastering layer 60 formed on the lightweight foam concrete layer (50). At this time, as shown in the bottom structure 10, that is, the flow path groove 12 is provided in the concrete foundation slab (S) itself to form an air circulation space (F1), the side of the floor, that is, the flow path in the wall (W) The forming member 30 is installed to have a side air flow path F2 formed therein. And as usual, the mortar plastering layer 60 may have a structure in which a heating pipe line (P) is embedded. In addition, on the mortar plastering layer 60, a flooring material 70 such as a floor plate or a tile may be stacked. In this case, in laminating the flooring 70, as described above, the end 71 of the flooring 70 may be laminated so as not to cover the side air flow path F2, and a finish cover 80 is installed at the edge thereof. When the closing cover 80 is installed, it is preferable not to cover the side air flow path (F2).

9 is a partially exploded perspective view of the floor construction structure according to the third aspect of the present invention, and FIG. 10 is a cross-sectional view of main parts of the floor construction structure according to the third aspect of the present invention.

First, referring to FIG. 9, according to the third aspect of the present invention, the air distribution space F1 is formed on the flow path groove 12 provided in the floor structure 10 and on the floor structure 10. It may be formed by the space forming member 20 installed. In FIG. 9, the space forming member 20 in which the valleys 25 are formed in the y direction is illustrated as the space forming member 20. In addition, the bottom structure 10 exemplifies a state in which a channel groove 12 is formed in the x direction. Therefore, according to the third aspect of the present invention, the flow path groove 12 of the floor structure 10 and the valleys 25 of the space forming member 20 form the air circulation space F1. At this time, the flow path groove 12 in the x direction and the valley 25 in the y direction communicate with each other, thereby forming an air circulation space F1 communicating in the x-y direction.

10 is a floor construction structure according to the third aspect of the present invention. Referring to FIG. 10, the floor construction structure according to the present invention may include, for example, a floor structure 10 having a flow path groove 12; A space forming member 20 installed on the bottom structure 10; A heat insulation layer 40 disposed on the space forming member 20; Lightweight foamed concrete layer (50) poured on the insulation layer 40; And it may include a mortar plastering layer 60 formed on the lightweight foam concrete layer (50). At this time, according to the third aspect of the present invention, the air flow space F1 is formed by the flow path groove 12 and the space forming member 20 provided in the floor structure 10, that is, the concrete foundation slab S. The side surface of the bottom, that is, the wall (W) has a structure in which the flow path forming member 30 is installed to form the side air flow path (F2). And as usual, the mortar plastering layer 60 may have a structure in which a heating pipe line (P) is embedded. In addition, on the mortar plastering layer 60, a flooring material 70 such as a floor plate or a tile may be stacked. In this case, in laminating the flooring 70, as described above, the end 71 of the flooring 70 may be laminated so as not to cover the side air flow path F2, and a finish cover 80 is installed at the edge thereof. When the closing cover 80 is installed, it is preferable not to cover the side air flow path (F2).

According to the floor construction structure of the present invention described above, the noise generated in the upper layer (for example, the noise and vibration generated by the impact applied to the upper layer) is effectively absorbed, dispersed (exhausted) and has excellent interlayer sound insulation. More specifically, referring to FIG. 2, the noise generated in the upper layer is primarily exhausted while spreading through the air distribution space F1, and then secondarily exhausted in the process of passing through the side air flow path F2. do. In addition, the noise is returned to the source of noise generation (i.e., the upper floor) after passing through the side air flow path (F2) and is exhausted in the third. Accordingly, according to the present invention, the noise transmission to the lower layer is effectively blocked and has excellent interlayer sound insulation.

Floor construction structure according to the present invention can be usefully applied at the time of re-modeling as well as construction of new buildings. Specifically, villa-type buildings of multi-family houses or townhouses; Building structure with many rental offices inside; And cooperative types of apartments, schools, hospitals, and dormitories; It can be usefully applied to new construction of multi-story buildings, and can also be usefully applied to remodeling existing buildings as described above. In addition, the building includes a prefabricated building constructed by a precast method (PC method) applied to an apartment or the like.

1 is a partial perspective view of a floor construction structure according to a first aspect of the present invention.

2 is a sectional view of principal parts of the floor construction structure according to the first aspect of the present invention.

3 and 4 are perspective views showing an embodiment of the space forming member used in the present invention.

5 and 6 are perspective views showing an embodiment of the flow path forming member used in the present invention.

7 is a partial perspective view of the floor construction structure according to the second aspect of the present invention.

8 is a sectional view of principal parts of the floor construction structure according to the second aspect of the present invention.

9 is a partially exploded perspective view of the floor construction structure according to the third aspect of the present invention.

10 is a sectional view of principal parts of the floor construction structure according to the third aspect of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: floor structure 12: euro groove

20: space forming member 22: base portion

24: support 25: goal

26 frame 30 flow path forming member

32: base plate portion 34: flow path forming portion

40: insulation layer 50: lightweight foamed concrete layer

60: mortar plastering layer 70: flooring

80: finish cover P: heating piping line

S: Concrete Bubble Slab W: Wall

F1: air distribution space F2: side air flow path \

Claims (9)

Floor structure; An air circulation space formed on the bottom structure; A side air passage communicating the air circulation space with the noise generating source (upper layer); And And a flow path forming member installed on a wall and forming the side air flow path. The method of claim 1, The air distribution space is a floor construction structure of the building, characterized in that formed by a space forming member installed on the floor structure. The method of claim 1, The air distribution space is a floor construction structure of the building, characterized in that formed by the flow path groove provided in the floor structure. The method of claim 1, The air distribution space is a floor construction structure of the building, characterized in that formed by a space forming member provided on the floor structure and the flow path groove provided in the floor structure. The method according to claim 2 or 4, The space forming member is a plate-shaped base portion; And a support part supporting the base portion of the plate shape. The method according to claim 2 or 4, The space forming member is a floor construction structure of the building, characterized in that the bone is formed. The method of claim 1, The flow path forming member includes a base plate portion; And a flow path forming portion coupled to one surface of the base plate portion. The method of claim 1, The flow path forming member includes a first base plate portion; A second base plate portion; And a flow path forming portion interposed between the first base plate portion and the second base plate portion. The method of claim 1, The flow path forming member includes a first base plate portion; A second base plate portion; A flow path forming portion interposed between the first base plate portion and the second base plate portion; And a heat insulating material bonded to any one selected from the first base plate portion and the second base plate portion.

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