JP3263174B2 - Insulation structure of cool room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating structure for a cold room, such as a freezer or a refrigerator, which is maintained at a low temperature.

[0002]

2. Description of the Related Art Conventionally, the following methods [1] to [3] have been known for constructing this kind of cold storage room. [1] As shown in FIG. 4, a moisture-proof layer 3 is applied to a foundation 1 of a building wall, and an in-situ foam insulation material 7, for example, a polyurethane foam is continuously foamed thereon to form a heat insulation layer 4. The interior material 5 is provided inside the heat insulating layer 4. The ceiling is provided with support brackets below the suspension bolts 19 suspended by the ceiling beams 13 and the like.
For example, a C-shaped steel 14 is provided, and a ceiling foundation 15, for example, a keystone plate is mounted thereon. On-site foam insulation material 7, for example, polyurethane foam, is continuously foamed thereon. [2] As shown in FIG. 5, before constructing the framework of the building and constructing the outer wall, an inner surface material such as a keystone plate is constructed on the low temperature side of the room, and a foam insulation material 7 (for example, polyurethane foam) from the outside is constructed from the outside. Is continuously foamed. A moisture-proof layer 3 is applied thereon, and thereafter, an external finishing material of an appropriate material is attached to the outside. [3] As shown in FIG. 6, an inner surface material such as a reinforced concrete wall is constructed on the low temperature side of the room, and a foam insulation material 7 (for example, polyurethane foam) is continuously foamed from outside to form a heat insulation layer 4. Then, a moisture-proof layer 3 is provided thereon, and an external finishing material, for example, an iron plate, is attached to the outside.

[0003]

In the conventional structure described in the above [1], a heat insulating layer can be formed by working from the inside of a building, but a recent refrigerator-freezer, etc. Since an ultra-low temperature region having a temperature of −60 ° C. to −70 ° C. has come to appear, the following problem occurs. That is, in some of such ultra-low-temperature regions, the thickness of the heat-insulating layer exceeds 600 mm, and a phenomenon that causes heat loss due to deformation and destruction due to thermal stress of the heat-insulating layer due to ultra-low temperature has also been reported. In addition, [2] and [3]
According to the conventional structure described in (1), the heat insulating layer is formed outside the cold insulation room wall, and the outer surface side of the in-situ foam material is not restrained, so the inner wire mesh or glass mesh of the heat insulating material layer. By appropriately applying a crack preventing material such as the above, it is possible to prevent a crack or peeling from occurring as in the heat insulating material layer attached to the inside of the wall. However, constructions constructed from the outside in this way are easily affected by weather conditions such as rain and wind and snow, and are subject to significant restrictions on construction conditions, such as the installation space for construction scaffolds and the space for lifting materials. easy. Also, since the weight of the external finishing material increases,
A base material that can withstand this is required, leading to an increase in cost. SUMMARY OF THE INVENTION An object of the present invention is to provide a heat insulating structure for a cold storage room that can effectively prevent destruction and peeling of a very low-temperature heat-insulating layer having a large layer thickness while performing heat-insulating work from the indoor side.

[0004]

Means for Solving the Problems The technical means of the present invention taken to achieve the above-mentioned object is to form a heat insulating material from the room side on the ground to the base material constituting the wall surface of the cold storage room such as a freezing cold storage warehouse. In the heat insulating structure of a cold storage room in which a heat insulating layer is formed on the indoor side of the base, the heat insulating layer is formed of a heat insulating foamed resin material separated from the indoor and outdoor surfaces of the cold insulating room of the heat insulating layer .
A reinforcing frame made of lattice-like wood is embedded at a position near the surface layer inside the cold storage room inside the wall thickness , and
The size of the lattice wood is 5 to 75 mm square and the lattice spacing
Is 100 to 1000 mm, and a reinforcing frame is
The vicinity of the boundary of the heat-insulating layer with the base in the entire area defined by the heat-insulating layer is formed as a flexible portion that allows a slight distance movement of the heat-insulating foamed resin material relative to the base in the thickness direction of the heat-insulating layer. Embedding a reinforcing frame in the thickness direction of the heat insulating layer
The height of the heat insulation layer should be a quarter of the thickness of the heat insulation layer
It is desirable that the position is about one third. Further, the flexible portion may be formed of an elastic foam having better cushioning properties than other portions of the heat insulating foamed resin material.

[0005]

The operation of the above technical means is as follows. a. That is, since the heat insulation layer is formed by the construction from the inside of the building, compared to the case of construction from the outside,
The construction can be performed without being affected by weather conditions such as rain and snow. Further, unlike the case of constructing from outside, it is not necessary to secure a scaffold for construction and a space for lifting materials outside the building. b. While the heat insulation layer is formed on the indoor side of the wall by construction from the inside, the position of the heat insulation layer close to the surface on the indoor space side has a size of 5 to 75 mm square and a grid.
Supplies consisting of lattice wood with an interval of 100 to 1000 mm
Since the strong frame is embedded, the movement due to the heat shrinkage on the surface side of the heat insulating layer can be suppressed to about the shrinkage amount of the wood. In other words, wood has a very low heat shrinkage,
Moreover, since it is buried in a state of being framed in a lattice shape, it can strongly resist heat shrinkage of the heat insulating material of the heat insulating layer in both the vertical and horizontal directions in the plane of the wall of the cold storage room. Then, by setting the position of the grid as a fixed point, the direction of heat shrinkage of the heat insulating material was partitioned with the grid interval as one unit.
Since it is directed in both the forward and reverse directions within the range , even if the cold insulation room is wide and the surface of the heat insulating layer is large, the heat shrinkage of the heat insulating material does not accumulate at both ends in the surface direction. c. Moreover, the position where the reinforcing frame is provided in the heat insulating layer is
Insulation layer of the cold storage room away from the indoor and outdoor surfaces
A position close to the indoor space side surface inside the thickness of the heat-insulating foamed resin material
, The ultra-low temperature insulation layer, which tends to be thicker
As a result, an effective structure can be obtained. That is, insulation
Ultra low temperature cold storage room requiring a large layer thickness
Then, for example, a state in which the reinforcing frame is exposed inside the cold storage room
In the case of, the heat insulation layer is divided into small sections by the grid-like reinforcing frame.
Thermal shrinkage suppression effect in a wide range in the thickness direction of the heat insulating layer.
For effective use, increase the diameter of each grid
In the present invention, the reinforcing frame must be cut.
By burying it in the thermal layer, it is possible to increase the diameter of grid-like wood.
The resistance to heat shrinkage at ultra-low temperatures
Can be effectively used over a wide range in the thickness direction
You. Conversely, place the reinforcement frame far away from the cold room.
In the place where the heat insulation layer is divided into small compartments by the reinforcement frame.
Although it is not useful for suppressing thermal shrinkage of the layer, the present invention
Install a strong frame inside the insulation layer and at a position near the indoor space side surface.
In order to reduce the size of the heat insulation layer by reinforcing frames,
Can act effectively to suppress thermal shrinkage of the layer
You. d. In addition, the heat insulation layer in the entire area where the reinforcing frame is laid
Is not attached to the wall of the base that composes the cool room in a completely rigid connection, but is
Since there is a flexible part near the boundary with the wall and it is configured to be movable throughout the thickness direction of the heat insulating layer, a certain degree of heat shrinkage of the heat insulating material due to a decrease in the temperature of the cold storage room is reduced .
In a state in which no gap is formed between the wall and the wall , it is possible to easily accept the gap.

[0006]

The effects of the present invention employing the above technical means are as follows. I. The above a. ~ D. In addition to the effects described in (1), it is possible to increase the degree of freedom of the construction time without being affected by the weather conditions, and to use a cold storage room with no extra space outside the building or a cold storage room for existing buildings Although the advantage of the construction from the inside that the heat insulation layer can be applied can be utilized, there is an advantage that destruction and peeling of the heat insulation layer due to the difference in the amount of heat shrinkage from the base wall can be easily avoided. B. B. ~ D. From the operation described in the above, the effect of the temperature difference between the cold storage indoor temperature and the outdoor temperature acting on the heat insulating material of the heat insulating layer, the heat shrinkage is regulated by a grid-like reinforcing frame in the indoor part of the heat insulating layer, In the portion of the heat insulating layer near the outside of the refrigerator, some heat shrinkage is allowed, so that the difference in the amount of heat shrinkage between the heat insulating layer and the wall can be absorbed. In other words, it is impossible to completely prevent the heat shrinkage of the heat insulating layer, but the b. ~ D. As described, by using a very small timber of thermal expansion, it suppresses the indoor side of the heat shrinkage of the insulation, at the same time, the base
The opposing actions on both the inside and outside of the heat insulating layer are synergistically exerted, which allows a certain degree of relative movement in the thickness direction of the heat insulating layer with respect to the wall near the boundary with the wall. And
This prevents separation due to too large a difference in relative movement with the wall surface by allowing the heat insulation of the heat insulating material to be completely free, and the rigid connection with the wall surface is reduced by heat shrinkage. Since peeling from the wall surface due to peeling can be avoided, a cold storage room for ultra-low temperature can be constructed without difficulty. C. The size of the grid-like wood that composes the reinforcement frame is 5 to 75 mm
By forming the corners and the lattice spacing to be 100 to 1000 mm, the reinforcing frame in the heat insulating layer can be formed to have a sufficient strength structure when configuring the ultra-low temperature cold storage room. D. As described in claim 2, in the thickness direction of the heat insulating layer.
Position of the reinforcing frame to be inserted
Set at about 1/4 or 1/3 of the thickness
And the effect of the reinforcement frame on the heat shrinkage of the heat insulation layer.
More effectively than when it is located outside the range of
Easy to demonstrate. E. When the flexible portion is made of an elastic foam having good cushioning properties as described in claim 3, when the heat-insulating foamed resin material thermally shrinks, a gap is generated between the base and the heat-insulating foamed resin material. Avoid by the change in the volume elasticity of the elastic foam,
It is possible to avoid adverse effects such as a decrease in heat insulation performance due to condensation of moisture in the air that has entered the gap.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 are cross-sectional views of a heat insulating wall 2 provided inside a base 1 constituting a side wall of a cold storage room of the present invention, and
A partially cut-out plane is shown. The heat-insulating wall 2 is provided with a moisture-proof layer 3 provided closest to a boundary with the base 1.
And a heat insulating layer 4 provided on the indoor side of the moisture-proof layer 3 and an interior material 5 provided further inside.

[0008] The moisture-proof layer 3 is a flexible sheet that regulates the permeation of moisture and water vapor from the base 1 side to the cold insulation room side.
Or, it is composed of a coating agent (for example, an emulsion of rubber and asphalt, etc.), and is vertically oriented and about 90
By the presser bar 6 arranged at an interval of 0 mm,
Fixed against.

The heat insulating layer 4 is formed by foaming a heat insulating foamed resin material 7 such as urethane foam or polystyrene in situ to a thickness of about 450 mm. 3, a flexible portion 8 that allows a certain amount of movement in the thickness direction of the heat-insulating foamed resin material 7 is provided, and a reinforcing frame 9 is buried inside the thickness near the interior material 5 side. . The heat insulating layer 4 is provided with a wire mesh 10 at a position from the indoor side of the accommodating section 8 and the wire mesh 1
0 and the above-described reinforcing frame 9, the layer of the heat-insulating foamed resin material 7 also has a crack preventing material 1 such as a glass mesh or a wire mesh.
1 is arranged. The flexible portion 8 is made of glass wool or plastic elastic foam (for example, soft urethane foam), and is pressed against the base 1 by the holding bar 6. The wooden reinforcing frame 9 is configured by combining a vertical member 9A and a horizontal member 9B in a lattice shape, and each of the vertical members 9A and the horizontal member 9B has a side length of 25 to 50 mm.
And the lattice interval L is about 450 mm in both the vertical and horizontal directions. The lattice spacing L referred to here
Means the distance between the center lines of adjacent vertical members 9A and the distance between the center lines of adjacent horizontal members 9B. The reinforcing frame 9 configured as described above is buried at a position of about 30 to 50 mm from the surface of the heat insulating layer 4 on the side of the cold storage room. The presser bar 6 and the reinforcing frame 9 are fixed to the ground through heat insulating bolts 12 struck on the ground 1. This insulation bolt 1
Numeral 2 is made of plastic or stainless steel, and its surface is provided with a fat or oil such as grease or a release material such as a plastic tape.

[0010] The interior material 5 is a mounting member 5A which is disposed in a horizontal posture and has a wide vertical interval of about 900 mm.
And the surface members 5B arranged in the vertical direction and at small intervals. The mounting member 5A is fixed to the base 1 by being connected to the insulating bolts 12.

The heat insulation structure on the ceiling side of the cold storage room is configured as follows. A C-shaped steel 14 is provided as a support metal under a suspension bolt 19 suspended from the ceiling beam 13, and a keystone plate constituting a ceiling foundation 15 is mounted thereon. The heat insulation layer 4 is formed by in-situ foaming, and the moistureproof layer 3 is formed on the heat insulation layer 4. The heat-insulating layer 4 on the ceiling side is provided with a reinforcing frame 9 in a state of being buried in a layer near the ceiling base 15 near the indoor side, and an extension of the crack prevention material 11 on the side wall side inside. Is provided. And these are the hanging bolts 1
9, the relative position with respect to the ceiling beam 13 and the ceiling foundation 15 is fixed.

In the heat insulation structure on the floor side of the cool room, a concrete floor 17 is provided at an appropriate distance from a concrete foundation 16, and an insulating material 18 of an appropriate thickness is provided between the floor 17 and the foundation. Is sprayed on site by foaming.

In the heat insulating layer 4 of the cold storage room configured as described above, the shrinkage stress of the heat insulating foamed resin material 7 is reduced by the following phenomenon. That is, while the linear expansion coefficient of the heat-insulating foamed resin material 7 (for example, polyurethane foam) is 5 to 7 × 10 −5 mm ° C., the linear expansion coefficient in the length direction of the wood constituting the reinforcing frame 9 is 0.3. The wood shrinks only 1/15 to 1/20 of the heat insulating foamed resin material 7. Then, even if the cold storage room is considered to be a large one having a horizontal side of about 30 m, the contraction direction of the heat-insulating foamed resin material 7 is offset in the forward and reverse directions in each lattice interval L of the reinforcing frame 9. Therefore, the amount of shrinkage does not accumulate over the entire side wall or ceiling wall. And the lattice interval L of the reinforcing frame 9 is about 450
mm, which is a small dimension in view of the size of the entire cold storage room, and the amount of shrinkage of the wood and the heat insulating foamed resin material 7 regulated by the wood in this range is extremely small.

[Alternative Embodiment] (1) In the above-described embodiment, the ceiling of the cold storage room is configured to be suspended from the ceiling beam 13. A similar structure may be applied from the inside by the same procedure as that for the base 1 of the side wall. (2) The lattice-shaped wood is not limited to the one having a diameter of 25 to 50 mm square as described above, and may be any size of about 5 mm to 75 mm square depending on the degree of heat shrinkage stress of the heat insulating layer 4. It is only necessary to use a material having a strength that can withstand this, and the sectional shape is not limited to a square, but may be a rectangle or a circle. (3) Also, the interval between the lattices is not limited to the above-described about 450 mm,
It is desirable to set it in the range of 300 mm to 600 mm, but it can be set freely in the range of about 100 mm to 1000 mm depending on the diameter of the wood and the like. In short, it is sufficient to select a wood diameter and a lattice spacing L that can sufficiently resist heat shrinkage of the heat insulating layer 4 according to the size of the entire cold storage room, the thickness of the heat insulating layer 4, and the like. (4) The disposition position of the reinforcing frame 9 in the thickness direction of the heat insulating layer 4 is not limited to the position of 30 to 50 mm from the indoor side surface. Any position can be used as long as the position can effectively suppress the thermal shrinkage of the entire layer 4. For example, the position can be set as appropriate such as a position of about 1/4 or 1/3 from the indoor side of the thickness of the heat insulating layer 4. (5) Further, as in the embodiment, the reinforcing frame 9 is not limited to being provided at only one location in the thickness direction of the heat insulating layer 4, but may be provided at two or more locations. (6) The flexible portion 8 is not limited to the elastic foam having good cushioning properties as shown in the above-described embodiment. For example, the thin portion fixed at a predetermined interval (for example, at intervals of 900 mm) with respect to the base 1. By using a steel plate (for example, an iron plate having a thickness of about 0.3 to 0.5 mm) and attaching the heat-insulating foamed resin material 7 to the base 1 via the flexible portion 8 made of the thin steel plate, You may comprise so that the heat insulation foamed resin material 7 may allow movement by elastic deformation. In this case, the thin steel plate is not limited to a simple flat plate, but may be a plate having square ribs formed at predetermined small intervals or a corrugated plate formed into a corrugated shape as a whole. If used, a larger movement allowance can be secured. Further, when a thin steel plate is used as the flexible portion 8, the thin film
And the use of a moisture-proof flexible sheet or a coating agent can be omitted. (7) As the heat insulating structure on the floor side of the cold storage room, the heat insulating material 18 on the upper side of the concrete foundation 16 may be constituted by stacking plate materials having a predetermined thickness.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a heat insulating structure of a cold storage room.

FIG. 2 is a cross-sectional view showing the heat insulation structure of the cool room.

FIG. 3 is a partially cutaway front view showing the heat insulating structure of the cold storage room.

FIG. 4 is a longitudinal sectional view showing a conventional example.

FIG. 5 is a longitudinal sectional view showing a conventional example.

FIG. 6 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 4 Heat insulating layer 7 Heat insulating material 8 Flexible part 9 Reinforcement frame L Lattice spacing

Continuation of front page (56) References JP-A-62-37669 (JP, A) JP-A-56-67070 (JP, A) JP-A-57-184881 (JP, A) JP-A-63-118582 (JP) , A) Jpn. Sho 57-135620 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 23/06 303 E04B 1/76

Claims (3)

(57) [Claims] An insulated foamed resin material (7) is foamed in-situ from the indoor side of a base (1) constituting a wall surface of a cold storage room such as a freezing and refrigerated warehouse to form a heat insulating layer (4) on the indoor side of the base. The heat insulation structure of the formed cold storage room, wherein the heat insulation layer (4) is provided inside the cold storage room of the heat insulation layer (4).
Of the heat-insulating foamed resin material (7) apart from the side and outdoor surfaces
Together with the reinforcing frame comprising a grid-like timber (9) is embedded in the surface layer toward the position of the cold room indoor side inside thick, the
The size of the lattice wood is 5 to 75 mm square and the lattice spacing
(L) is 100 to 1000 mm, and the reinforcing frame
Before the insulation layer (4) in the entire area where (9) was laid
The vicinity of the boundary with the underlayer (1) is formed as a flexible portion (8) that allows the thermal insulation foamed resin material (7) to slightly move in and out of the underlayer (1) in the thickness direction of the heat insulating layer (4). Heat insulation structure of the cool room. 2. A reinforcing frame in a thickness direction of a heat insulating layer (4).
The embedding position of (9) is a heat insulation layer from the inside of the cold storage room.
(4) at a position about 1/4 or 1/3 of the thickness
Heat insulating structure of the cold chamber of claim 1, wherein that. 3. The heat insulating structure of a cold storage room according to claim 1, wherein said flexible portion (8) is made of an elastic foam having better cushioning properties than other portions of the heat insulating foamed resin material (7).