JPS6237670A - Ceiling wall heat-insulating structure of cold-insulating chamber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to attaching a heat insulating material such as urethane foam or polystyrene to the outer surface of a ceiling wall constituting a cold storage room such as a freezer by appropriate means such as spraying. Regarding the insulation structure of the ceiling wall of a cold storage room.

[Conventional technology]

When constructing this type of ceiling wall insulation structure for a cold storage room, a construction method is generally adopted in which the insulation material is attached tightly to the outside surface of the ceiling wall, but this construction method causes the following problems. was there.

That is, when considering the water vapor permeation state of the insulation material due to the temperature difference between the cold storage room and the outside air, for example, when the temperature is 30°C, the water vapor pressure is 0.04322 kg/cut (31,83
m * II g ), but up to 2
At 0℃, it is 0.02380ksr/cd (17,53
n+Hg) and much less. Furthermore, the temperature is 15
℃, it is 0.0043kg/cJ (3.16mmHg
), which is about 1710, -20 compared to 30°C.
0.00105kg/cnf (0.77w
ml1g) is about 1742. Therefore, since the insulation materials located at the boundary of the large temperature difference between the cold storage room and the outside air also have their own water vapor permeability, it is inevitable that water vapor will enter from the high temperature side of the insulation material through the inside to the low temperature side. As a result, the water vapor that permeates through the insulation material gradually condenses and condenses as it approaches the low-temperature ceiling wall surface, and this condensed water with high thermal conductivity accumulates on the insulation material, gradually reducing the insulation performance of the insulation material.

In addition, as a means to suppress such a decline in insulation performance, a method of applying moisture-proofing treatment to the high-temperature side of the insulation material has been adopted, but if there is even the slightest defect in the moisture-proofing treatment, the same problem as mentioned above may occur. As a result, moisture-proofing treatment requires a great deal of effort and advanced technology, and there has been a problem in that construction costs have skyrocketed.

[Problem that the invention seeks to solve]

The purpose of the present invention is to suppress the deterioration of insulation performance caused by the accumulation of condensed water within the insulation material through rational modification that actively utilizes the property that water vapor moves from the high temperature side to the low temperature side. The point is to make it possible.

[Means for solving problems]

The characteristic configuration of the ceiling wall insulation structure of the cold storage room according to the present invention is that a moisture permeable partition material is interposed between the upper surface of the ceiling wall and the heat insulating material in a state where a gap is formed between the top surface of the ceiling wall and the soil surface of the ceiling wall, and A communication hole is formed in the ceiling wall to communicate the gap and the cold storage room, and its functions and effects are as follows.

[For production]

Even if water vapor enters from the high-temperature side of the insulation material due to the water vapor pressure difference caused by the temperature difference between the cold storage room and the outside air, this water vapor will pass through the partition material to the gap formed between the ceiling wall surface and the insulation material. A portion of the vapor can be condensed within this gap. Moreover, even if dew condenses on the low temperature side within the IVr heating material, this condensed water can be made to drip into the gap. Furthermore, since the water vapor and condensed water in the gap are guided into the cold storage chamber through the communication hole formed in the ceiling wall, there is no accumulation of condensed water in the insulation material, or even if it is accumulated, it is lower than before. The accumulated amount can be greatly reduced.

〔Effect of the invention〕

Therefore, by utilizing the property that water vapor moves from the high temperature side to the low temperature side, it is only necessary to form the gaps and communication holes as described above to actively guide this water vapor into the cold storage chamber.
It has become possible to suppress the decline in insulation performance caused by the accumulation of condensed water within the insulation material while simplifying construction.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figures 2 and 3 show a steel-framed freezer, which is built on a concrete foundation (PL) and connected to the gassho (1) of a steel-framed building (A) via hanging bolts (2). The main channels (3) are fixed, and a plurality of keystone plates (5) constituting the ceiling wall are laid on the channels (4) constructed across these main channels (3), and the rim (6) ) A plurality of keystone plates (9) constituting the side walls are attached to the crosspiece (8) fixed to the frame via heat insulating bolts (7), and the upper surface of the keystone plate (5) for forming the ceiling wall is A heat insulating material (1o) such as rigid polyurethane foam is sprayed on the back side of the keystone plate (9) for configuring the side wall, respectively, and the keystone plates (5) and (9) are used to form a refrigerator, which is an example of a cold storage room. A room (s1) is configured.

As shown in FIG. 1, a gap (a) is formed between the upper surface of the keystone plate (5) for forming the ceiling wall and the heat insulating material (lO). In this state, canvas (which is an example of a moisture-permeable partition material)
11) and the keystone plate (
5) Utilizing the gap formed between the overlapping parts of (5), the gap (9) and the freezer compartment (1) cold storage compartment (S1
) is also used as a communication hole (12).

Therefore, by constructing such a ceiling wall structure,
Due to the water vapor pressure difference caused by the temperature difference between the freezer compartment (S,) and the outside air, water vapor flows to the high temperature side of the insulation material (10), that is,
Even if the water vapor enters from above, it can be guided into the gap (a) through the canvas (11) and a part of the water vapor in the gap (a) can be condensed. Also, insulation material (10)
Even if dew condenses on the low-temperature side of the gap (a), this condensed water can be made to drip into the gap (a). Furthermore, the water vapor and dew condensation in the gap (a) are passed through the communication hole (12) into the freezing compartment (S).
+), so condensed water does not accumulate inside the insulation material (10), or even if it does, the accumulation layer is small and condensed water does not accumulate inside the insulation material (10). This makes it possible to suppress the deterioration in insulation performance caused by this.

In addition, in two places spaced apart from each other by a predetermined distance in the thickness direction of the heat insulating material (10), reinforcing glass reinforcements are placed parallel to the keystone plates (5) and (9).
-(13), and a moisture proof material (14) is attached to the outer surface of the heat insulating material (10).

When such a moisture-proof material (14) is attached, it is possible to suppress the amount of water vapor that enters into the insulation material (10), so as mentioned above, condensed water does not enter the insulation material (10). This has the advantage of being able to more effectively suppress the deterioration in heat insulation performance caused by the accumulation of .

The hanging bolt (2) is connected to the brace of the hands (1).
The iron bolt (2a) fixed to (15) and the iron bolt (2a) are configured to have smaller dimensions than (2a),
In addition, a stainless steel bolt (2b) is fixed to the main channel (3) with a naso], etc., and an iron nut (2c) that connects these two poles (2a) and (2b) with adjustable length. ).

By configuring the hanging bolt (2) in this way, it is possible to use stainless steel (pol) (2), which has a lower thermal conductivity than iron.
b), while suppressing heat conduction loss, overall
Since it accounts for a large proportion, it has the advantage of being able to be constructed at low cost.

Further, the hanging bolt (2) is covered with a heat insulating cover (16) such as a styrene cover that covers the iron bolt (2a) that protrudes upward from the heat insulating material (10). This heat insulating cover (16) can further effectively suppress heat transfer loss of the suspension bolt (2).

As shown in FIG. 4, the insulation bolt (7) has a rim (
6) (7a), the bolt (7b) inserted from the crosspiece (8), and both of these poles)
(7a) and (7b), and (7c) made of synthetic resin.

Next, the inside of the building (A) is divided into a freezing room (1) and a cold storage room (S1).
The structure of the partition wall that partitions the front room and the front room (s2) will be explained.

As shown in Figure 5, on the concrete foundation (PL),
Hyphen compression cold insulation material (17) such as high-density urethane foam with a density of 200 to 300 kg/m!
I, and on this Hyphen Blend John cold insulation material (I7),
The pillar (19) is fixed via the anchor pole (18) extending from the concrete foundation (PL), and a keystone for side wall construction is installed on the side of the pillar (19) on the front chamber (S2) side. Attach the plate (20).

A heat insulating material (1o) such as rigid polyurethane foam is sprayed on the upper surface of the concrete foundation (FL) and the sides of the front room (S2) of the keystone braze (20), respectively, and the floor of this heat insulating material (10) is Concrete is applied to the surface structure part.
1-(21), and pass the front chamber (S2
) At the tip of the insulation bolt (7), which extends along the
23) is attached, and a keystone plate (24) for side wall construction is attached to this crosspiece (23).

Like this partition wall structure, by constructing columns (19) through high compression cold insulation materials (17), the top surface of the concrete foundation (PL) and the front chamber (s2) of the keystone plate (20) can be The spraying of the insulation material (10) on the sides not only allows the work to be carried out at the same time, but also the concrete foundation (FL) and the holding concrete (21), as well as the holding concrete (21) and the freezing material on the side of the front room (S2). Room (S+) Gawa no concrete)
(21) can be completely partitioned through the heat insulating material (10), so overall the construction period can be shortened while reducing the deterioration of insulation performance due to heat exchange between each concrete. There are advantages to being able to do so.

Next, another example will be listed.

(b) In the above embodiment, a? Although canvas is used as the W-type partition material, the present invention is not limited to this canvas; for example, other moisture-permeable partition materials such as non-woven fabric or glass net may be used.

(b) In the above embodiment, the communication hole (12) that communicates the gap (a) with the freezing chamber (1) and the cold storage chamber (S1) is formed between the gap formed between the overlapped portions of the keystone plates (12). Although it was configured to be used for both purposes, there is a dedicated communication hole (12)
It may also be implemented by drilling the keystone plate (12).

(c) The heat insulating material (10) includes polystyrene, urethane foam, phenol foam, glass wool, etc., and may be appropriately selected depending on cold storage conditions, construction conditions, etc.

[Brief Description of the Drawings] The drawings show an embodiment of the ceiling wall insulation structure of a cold storage room according to the present invention, and FIG. 1 is a longitudinal sectional front view of the main part, and FIGS. 2 and 3 are cross-sectional plan views of the building. FIG. 4 is an enlarged sectional view of a main part showing the structure of the side wall-related mounting LJ groove, and FIG. 5 is a longitudinal front view showing the structure of the partition wall. (1) Cold storage room (S1)... Cold storage room, (a)...
...Gap, (5) ...Ceiling wall, (10)
...Insulation material, (11) ...Partition material, (
12)...Communication hole.

Claims (3)

[Claims] (1) A ceiling wall insulation structure of a cold storage room in which a heat insulating material (10) is attached to the top surface of a ceiling wall (5) constituting a cold storage room (S_1), the top surface of the ceiling wall (5) and the heat insulating material (10), a moisture permeable partition material (11) is interposed to form a gap (a) between the upper surface of the ceiling wall (5), and
The ceiling wall (5) has the gap (a) and the cold storage room (S_1).
) The ceiling wall insulation structure of the cold storage room is formed with a communication hole (12) that communicates with the cold storage room. (2) A ceiling wall insulation structure for a cold storage room according to claim (1), wherein the partition material (11) is canvas. (3) the ceiling wall (5) is a keystone plate;
and the communication hole (12) is connected to the keystone plate (5).
A ceiling wall insulation structure for a cold storage room according to claim (1), wherein the ceiling wall insulation structure of a cold storage room is configured by a gap formed between overlapping portions of the above.