JP3486997B2 - Floor air-conditioning structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor blow-out type air conditioning structure having a double floor space as an air flow path.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a floor blow-out type air conditioning structure in an office building having a large floor area has a floor laid on a concrete floor slab 1 and a predetermined height H above it. The air conditioner 3 is located under the floor at one end side in the longitudinal direction, for example, as an air circulation path in the double floor.
The conditioned air blown from the room is circulated, and the conditioned air is blown into the room R as indicated by arrows through a plurality of floor outlets 4 which are opened at appropriate positions on the floor 2 and provided with louvers 4a for blowing on the opening surface. It is a method of supplying and economical because it does not require a dedicated duct pipe.

[0003]

However, in this method, the conditioned air also comes into contact with the concrete surface constituting the floor slab 1 and a part of the heat is exchanged as shown by the arrow of the chain line. In particular, it takes a long time to reach the desired air conditioning temperature, especially at the start of operation and at a time when there is a large indoor / outdoor temperature difference such as winter or summer. Further, since the heat capacity of concrete is large, the heat exchanged with the indoor air is stored even after the operation is stopped, which has an effect on the air conditioning operation on the next day, and depending on the distance from the air conditioner 3, each floor outlet 4 There is a variation in the temperature from.

When the room R is not partitioned by a partition wall, even if there is a slight difference in the temperature of the conditioned air from each floor outlet 4, the indoor temperature distribution is averaged due to complete diffusion in the room R. However, when the room R is partitioned by a partition wall or the like, a temperature distribution according to the outlet temperature is formed,
There is a drawback that some compartments may be too hot or too cold.

Therefore, in the office where the plan of the partition wall is undecided, it is desirable that the blowout temperature is kept within the approximate set temperature ± 0 to 2 ° C. even if the characteristics of the air conditioning system are taken into consideration. The impact needs to be prevented.

As a countermeasure in this case, the floor slab 1 may be sufficiently insulated, but it is necessary to consider the cost required for the heat insulation and the influence on the floor height in order to secure an effective opening area in the flow of the conditioned air. there were.

Therefore, the present invention has been made to solve the above problems, and its purpose is to:
(EN) Provided is a floor blow-out type air conditioning structure in which the thermal influence of a floor slab in the seed bed blow-out method is prevented while considering the economical efficiency and the influence on the floor height.

[0008]

In order to achieve the above object, the present invention is arranged at one end in the longitudinal direction under the floor as an air flow passage in the double floor between the floor slab and the floor arranged above it. In the floor blowout system in which the conditioned air blown from the air conditioner is circulated and the conditioned air is supplied to the room through a plurality of floor blowouts opened at appropriate positions on the floor, the front face of the blowout port of the air conditioner To a predetermined range, a heat insulating material is applied to the surface of the floor slab in a substantially fan shape (claim 1).

Further, it is desirable that the heat insulating material occupy an area of 10 to 40% of the air conditioning section under the floor (claim 2), and the minimum width of the heat insulating material is 2 of the outlet width.
The width is equal to or more than twice, and is equal to or less than the width dimension of the underfloor air conditioning section, the maximum width is three times the width of the air outlet or 3/4 times the width dimension of the underfloor air conditioning section, and the maximum length is the same as the air conditioning section. It is desirable to set it to 1/2 of the length dimension (Claim 3).

[0010]

With the above structure, the heat insulating material does not directly contact the airflow immediately after the air is blown from the air conditioner and the floor slab, and the influence of heat exchange between the conditioned air and the floor slab can be reduced, and at the same time, The temperature of the conditioned air blown out from the floor outlet after passing through the place where the heat insulating material is not installed can also be kept within the approximate set temperature ± 0 to 2 ° C, and is evened out to a substantially problematic level. .

According to the second aspect, it is possible to achieve both economical efficiency and efficiency of influence on the floor height.

In the third aspect, the shape of the heat insulating material corresponds to the distribution distribution of the conditioned air flowing under the floor.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view of an air conditioning structure in the floor blowing system according to the present invention, and FIG. 2 is a plan view of an air conditioning section under the same floor. Since the basic structure of the floor blowing method is the same as the conventional one, the same parts as those in the conventional FIG.
Description will be made using different reference numerals only for newly added portions.

That is, in the present invention, as in the conventional case, the space between the concrete floor slab 1 and the floor 2 arranged above the concrete floor slab 1 with a predetermined floor height H being maintained is used as an air flow passage in the double floor. While circulating the conditioned air blown out from the air conditioner 3 arranged at the center of one end in the longitudinal direction,
The conditioned air is supplied to the room R through a plurality of floor outlets 4 that are opened at appropriate positions on the floor 2 and provided with blowout louvers 4a on the opening surface, as indicated by arrows.

In the present invention, the heat insulating material 10 is applied to the surface of the floor slab 1 over a predetermined range from the front surface of the air outlet of the air conditioner 3.

The heat insulating material 10 is formed by sticking a molded resin or glass fiber material or applying a powdery heat insulating material by spray coating.
It is constructed in a state in which the air outlet 3a has a minimum width and opens in a substantially fan shape in the longitudinal direction of the air conditioning section.

More specifically, assuming that the width dimension W1 of the outlet 3a, the width dimension W of the air conditioning section under the floor, and the length dimension L, the maximum length of construction is about L / 2 and the minimum width is about 2.
× W1, the maximum width is set to a value up to about 3 × W1 or 3 / 4W, so that the area of the heat insulating material 10 occupies about 10 to 40% of the air conditioning section area (W × L). To do.

Therefore, the conditioned air immediately after being blown out from the air outlet 3a passes through the upper surface of the heat insulating material 10 without directly contacting the floor slab 1 and thus is not affected by heat exchange with the floor slab 1 and is roughly It is supplied to the room R through each floor outlet 4 while being maintained at the set temperature.

It has been confirmed by experiments that the conditioned air blown out from the floor outlets 4 opened in the floor 2 outside the construction range of the heat insulating material 10 is also maintained at a substantially set temperature, and this portion is the floor slab. It was determined that 1 was controlled within the target range of approximately the set temperature ± 0 to 2 ° C. despite being exposed.

This means that the temperature of the conditioned air passing over the heat insulating material 10 is maintained at the temperature of the air outlet 3a, and
Due to the relationship between the spread of the air flow over the entire underfloor air-conditioning section and the contact length with the floor slab 1, it is considered that the thermal influence of the floor slab 1 is small even at the floor outlet 4 that is far away from the outlet 3a.

However, if the construction area of the heat insulating material 10 is less than about 10% of the air-conditioning floor area, it does not fall within the target temperature, and if it exceeds about 40%, it is controlled to the target temperature. However, since it is uneconomical, it is desirable to set it within the above range.

The heat insulating material 10 has a construction thickness of about 6 mm at the maximum which does not affect the floor height H at the optimum aspect ratio of air circulation (floor height H / width W). It is desirable to set the range to 1 mm or more, which is the lower limit value of.

[0023]

As described above in detail with reference to the embodiments, in the floor blow-out type air conditioning structure according to the present invention,
There is no direct contact between the airflow immediately after it blows out from the air conditioner and the floor slab due to the heat insulating material, and it is possible to reduce the effect of heat exchange between the air conditioning air and the floor slab, and at the same time pass through the area where the heat insulating material is not installed. Then, the temperature of the conditioned air blown out from the floor outlet falls within the assumed temperature range, as in other places.

In the case of the structure of claim 2, there is an advantage that the thermal influence of the floor slab can be prevented by using a small amount of heat insulating material, the construction is economical, and the floor height is not influenced.

In the case of claim 3, there is an advantage that the construction shape of the heat insulating material corresponds to the distribution distribution of the conditioned air under the floor, and the desired effect can be obtained with the minimum area.

[Brief description of drawings]

FIG. 1 is a sectional view showing a floor blowing type air conditioning structure according to the present invention.

FIG. 2 is a plan view showing an air conditioning section under the same floor.

FIG. 3 is a cross-sectional view showing a conventional floor blowing type air conditioning structure.

[Explanation of symbols]

1 concrete floor slab 2 floors 3 Air conditioner 3a Air outlet 4 Floor outlet 10 Insulation material

Continuation of the front page (56) References JP-A-6-281196 (JP, A) JP-A-6-185756 (JP, A) JP-A-6-300350 (JP, A) Actual Development Sho 63-137221 (JP , U) Actual Kai 3-25718 (JP, U) Actual Kai 7-26640 (JP, U) Actual Kai 6-28539 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) F24F 13/00-13/15 E04F 15/00-15/18

Claims (3)

(57) [Claims] 1. A conditioned air blown from an air conditioner disposed at one longitudinal end of the floor is circulated as an air circulation path in a double floor between the floor slab and a floor arranged above the floor slab, and In a floor blowing method for supplying the conditioned air into the room through a plurality of floor outlets opened at appropriate positions on the floor, a heat insulating material is provided on the surface of the floor slab over a predetermined range from the front face of the outlet of the air conditioner. A floor-blowing type air-conditioning structure characterized by being constructed in a fan shape. 2. The floor blow-out type air conditioning structure according to claim 1, wherein the heat insulating material occupies an area of 10 to 40% of an air conditioning section under the floor. 3. The minimum width of the heat insulating material is not less than twice the outlet width of the air conditioner and not more than the width dimension of the underfloor space section, and the maximum width is three times the outlet width or the underfloor air conditioning. The floor blowing type air conditioner according to claim 1 or 2, wherein the width is 3/4 times the width of the compartment, and the maximum length is set to 1/2 of the length of the air conditioning compartment. Construction.