JP7168530B2 - Floor radiant air conditioning system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor radiant air-conditioning system, and more particularly to a floor radiant air-conditioning system capable of efficiently utilizing radiant heat from the floor in adjusting the environment of a living room.

Conventionally, cold air and warm air generated by an air conditioner are sent through a nonflammable resin film duct (hereinafter referred to as a film duct) laid in the underfloor space of a living room, etc., and a branching branch provided in the film duct There is known an air conditioning system that converts horizontal airflow into direct jet flow using fixtures, heats and cools the flooring and ceiling materials, and uses the cold radiant heat and warm radiation generated from the flooring and ceiling materials for cold radiation. ing.

JP-A-2005-337690

The air-conditioning system uses a film duct to convey cold air and warm air. This film duct is used to convey cold or warm air.

However, in the air conditioning system, the film duct only has a role of conveying cold air or hot air, and cannot be effectively used for heat transfer (conduction).

Accordingly, the present invention has been made in view of the above problems, and provides an efficient floor outlet radiant air-conditioning system that not only utilizes the duct as a conveying path, but also forms a radiant environment.

As a configuration of the floor outlet radiant air-conditioning system for solving the above-mentioned problems, the floor outlet radiant air-conditioning system blows out the air discharged from the ducts installed under the floor and connected to the air conditioner to the living room from the outlets provided on the floor. In the system, the duct has a plurality of holes for discharging the air supplied from the air conditioner, expands and contracts in the vertical direction of the space under the floor according to the flow rate of the supplied air, and at the maximum expansion, The structure is such that the surface on which the holes are formed is in contact with the rear surface of the floor.
According to this configuration, it is possible to efficiently prepare the radiation environment in the living room.
As another configuration of the floor blowing radiant air conditioning system, the duct is formed so that the contact area with the rear surface of the floor increases as the amount of air supplied increases, or a plurality of holes are formed toward the floor surface. You may set it.

1 is a schematic diagram of a floor bleed radiant air conditioning system; FIG. It is a figure which shows the operation|movement of an expansion-contraction duct. It is a figure which shows the relationship between the expansion-contraction duct and the size of underfloor. It is a figure which shows the effect|action at the time of heating. It is a figure which shows the effect|action at the time of heating. FIG. 10 is a diagram showing actions during cooling; FIG. 10 is a diagram showing actions during cooling; FIG. 10 is a diagram showing another form of the duct; It is a figure which shows the application example to a living room.

Hereinafter, the present invention will be described in detail through embodiments, but the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments It is not essential to the solution of the invention.

FIG. 1 is a schematic diagram showing an example of a floor outlet radiant air conditioning system according to this embodiment. 1(a) and 1(b) show cross sections of the living room 2 perpendicular to each other.

As shown in FIG. 1, the floor blowing radiant air-conditioning system 1 supplies warm air or cold air from an air conditioner 3 provided outside a living room 2 to an underfloor space 6 provided under a floor 5 of the living room 2 through a duct 4. Then, the air in the living room 2 is blown out through the air outlet 7 provided in the floor 5, the air in the living room 2 is taken in from the air inlet 9 provided in the wall 8 of the living room 2, and the air is returned to the air conditioner 3 through the duct 10. configured to be cyclical.

The living room 2 is partitioned as one space by the floor 5, the walls 8, the ceiling 11, and the like. The air conditioner 3 adjusts the temperature and humidity of the air so as to optimize the environment of the living room 2, and supplies hot air, cold air, and the like.

The duct 4 is composed of, for example, a ventilation duct 12 extending from the air conditioner 3 to the vicinity of the underfloor space 6 and an expansion/contraction duct 13 connected to the ventilation duct 12 and provided in the underfloor space 6 . The ventilation duct 12 is a pipe made of metal, resin, or the like, through which warm air and cold air supplied from the air conditioner 3 pass.

The expansion/contraction duct 13 is provided so as to extend in one direction, for example, between the heat insulating material 19 and the underfloor substrate 17 in the underfloor space 6 .

Here, the underfloor space 6 will be described. The underfloor space 6 includes, for example, a concrete slab 15 provided on the girders 14, an underfloor substrate 17 and a floor finishing material 18 supported by a support member 16 for separating the concrete slab 15 from the concrete slab 15 by a predetermined distance. This is the space formed between the floor 5 and the floor 5 which are brought into close contact with each other. The underfloor substrate 17 is preferably made of a material having good thermal conductivity, and more preferably has fins on the underfloor surface 5a for promoting heat exchange. A heat insulating material 19 is attached to the surface of the concrete slab 15 on the floor 5 side.

The expansion/contraction duct 13 is, for example, a cylindrical body made of a porous material having air permeability such as stretchable and flexible cloth, and is connected to the ventilation duct 12 at one end and connected to the other end. It is formed in the shape of a bag with a closed part. The expansion/contraction duct 13 may be made of a shape-memory material or the like that can change its shape according to temperature, and may be configured so that the expansion/contraction duct can be extended to the closed end side.

The expansion/contraction duct 13 allows the warm air or cold air supplied from the air conditioner 3 to pass through the ventilation duct 12 due to the ventilation due to the pores (not shown) formed by the mesh of the fibers such as cloth forming the expansion/contraction duct 13 . 1, it passes through the expansion/contraction duct 13 and blows out into the underfloor space 6 so as to seep into the underfloor space 6. As shown in FIG. For example, a so-called sock duct or the like can be used as the expansion/contraction duct 13 having such a function.

The air outlet 7 is provided with a fan 7A, and the hot air and cold air blown out from the expansion/contraction duct 13 to the underfloor space 6 are blown out to the living room 2 by the operation of the fan 7A. It should be noted that the fan 7A is not essential in the configuration of the outlet 7. The suction port 9 is provided as an opening for taking in the air that is blown out from the blowout port 7 into the living room 2 and has undergone heat exchange with the air in the living room 2 . The duct 10 is a pipe made of metal, resin, or the like, similar to the ventilation duct 12 , and is connected to the air conditioner 3 .
Note that the floor 5 may have a plurality of holes penetrating into the underfloor space 6 without providing the outlet 7 .

FIG. 2 is a diagram showing the operation of the expansion/contraction duct 13 viewed from the direction of FIG. 1(b). For example, when the supply of air by the air conditioner 3 is stopped, the expansion/contraction duct 13 is in the most contracted state as shown in FIG. in a placed state. When the expansion/contraction duct 13 is supplied with air from the air conditioner 3, it expands as shown in FIG. When the air supply from the air conditioner 3 reaches a predetermined air volume (flow rate), the expansion/contraction duct 13 expands further from the state shown in FIG. Contact. That is, the expansion/contraction duct 13 is configured to be expandable/contractible in accordance with the amount of air blown inside.

FIG. 3 is a diagram showing the relationship between the size of the expansion/contraction duct 13 and the distance from the heat insulating material 19 to the underfloor substrate 17 under the floor. The size of the expansion/contraction duct 13 is preferably set according to the distance L from the heat insulating material 19 to the underfloor substrate 17 . The size here means the outer diameter dimension when the expansion/contraction duct 13 is in the maximum expansion state. For example, the expansion/contraction duct 13 is preferably sized to contact at least the rear surface 5a of the floor as shown in FIG. 3(A) when expanded to the maximum. Preferably, as shown in FIG. 3B, the maximum expansion is considered to be a perfect circle, and the diameter at this time is set larger than the distance L, so that the floor surface 5a and the floor surface 5a can be adjusted according to the increase or decrease in the amount of air blown. contact area can be increased or decreased. That is, the expansion/contraction duct 13 is expanded to some extent, and the contact area is increased by further increasing the amount of air blown from the state in which the duct 13 is in contact with the bottom surface 5a. The reduction in area can lead to temperature regulation.

The operation of the expansion/contraction duct 13 during use of the air conditioning system will be described below. 4 and 5 are diagrams showing the action during heating.

When heating the living room 2, as shown in FIG. 4, the amount of warm air blown is adjusted so that the area of the contact surface S between the surface of the expansion/contraction duct 13 and the floor surface 5a is maximized. Inflate 13.

The warm air that expands the expansion/contraction duct 13 blows out into the underfloor space 6 due to the air permeability of the expansion/contraction duct 13, spreads along the floor surface 5a, forms a layered hot air pool H, and spreads the floor 5 from the floor surface 5a side. heat up. Also, the warm air blown into the underfloor space 6 is sent to the living room 2 from the air outlet 7 via the fan 7A.

Furthermore, the heat of the hot air flowing through the expansion/contraction duct 13 and the expansion/contraction duct 13 warmed by the hot air provide heat to the floor back surface 5a in contact with the expansion/contraction duct 13 . The contact between the hot air pool H and the expansion/contraction duct 13 heats the underfloor substrate 17 and the floor finishing material 18 . The surface of the floor 5 heats the living room 2 as a radiation field.

In other words, in the living room 2, the expansion/contraction duct 13 warmed by the heat of the hot air pool H, the heat of the hot air flowing through the expansion/contraction duct 13, and the heat of the hot air flowing through the expansion/contraction duct 13 is connected to the underfloor substrate. 17 can be heated, and the radiant heat conducted to the floor finishing material 18 and the heat of the hot air blown out from the outlet 7 can be used for heating.

When the room 2 becomes too warm, the expansion/contraction duct 13 can be contracted to separate it from the floor 5, as shown in FIG. As a result, heating can be maintained by the heat of the floor 5 heated by the hot air pool H formed under the floor and the heat of the hot air blown out from the outlet 7 . If the living room 2 is overheated, the amount of air blown may be reduced to separate it from the floor 5 or the temperature of the air blown may be lowered.

6 and 7 are diagrams showing the action during cooling.
When cooling the living room 2, as shown in FIG. inflate.

The cold air that expands the expansion/contraction duct 13 is blown out into the underfloor space 6 due to the air permeability of the expansion/contraction duct 13, and is sent to the living room 2 from the outlet 7 via the fan 7A.

Furthermore, the heat of the cold air flowing through the expansion/contraction duct 13 and the expansion/contraction duct 13 cooled by the cold air apply cold heat to the floor surface 5a in contact with the expansion/contraction duct 13. The contact of the expansion/contraction duct 13 cools the underfloor substrate 17 and the floor finishing material 18 . The surface of the floor 5 cools the living room 2 as a radiation field.

That is, in the living room 2, the expansion/contraction duct 13 cooled by the heat of the cold air flowing through the expansion/contraction duct 13 and the heat of the cold air flowing through the expansion/contraction duct 13 cools the underfloor substrate 17, and the floor finishing material Cooling can be performed by the radiant cold heat conducted to 18 and the heat of the cold air blown out from the outlet 7 .

When the living room 2 becomes too cold, the expansion/contraction duct 13 can be contracted to separate it from the floor 5, as shown in FIG. As a result, cooling can be maintained by the heat of the cool air blown out from the outlet 7 . If the living room 2 is too cold, the air flow rate may be reduced to separate the expansion/contraction duct 13 from the floor 5, or the air temperature may be increased.

By omitting the heat insulating material 19, the cold air in the underfloor space 6 cools the ceiling of the lower floor, thereby forming a radiation environment for the upper and lower floors.

As described above, according to the floor blowing radiant air conditioning system 1, hot air or cold air is sent from the air conditioner 3 to the expansion/contraction duct 13, and the air permeability of the expansion/contraction duct 13 creates the underfloor space 6. The floor 5 can be heated or cooled by blowing out to the underfloor space 6 and diffusing it. In addition, the expansion/contraction duct 13 heated or cooled by hot air or cold air comes into contact with the floor rear surface 5a and directly heats or cools the floor rear surface 5a. can enhance the effect of

FIG. 8 is a diagram showing another form of the duct.
As shown in the figure, the expansion/contraction duct 13 may be configured so as to blow out toward the rear surface 5a of the floor when inflated, as indicated by the arrows in the figure. In addition to blowing air from the air permeability of the expansion/contraction duct 13, a hole 20 is provided in the expansion/contraction duct 13 according to the position to be blown, and while the expansion/contraction duct 13 is inflated, the air is blown from the hole 20 to the floor surface as indicated by the arrow in the figure. By blowing out more hot air and cold air toward 5a, it is possible to extend the reach of the warm air along the floor back surface 5a due to the Coanda effect. In addition, when using the Coanda effect, it is preferable to provide the hole 20 on the floor rear surface 5 a side of the expansion/contraction duct 13 .

FIG. 9 shows a concrete example of using this air conditioning system in the living room 2 .

In the above-described embodiment, the expansion/contraction duct 13 is used by extending it in one direction. However, as shown in FIG. good. In this case, by forming the aforementioned holes 20 so as to blow out to the inside of the enclosure and increasing the amount of air blown, the area surrounded by the expansion/contraction duct 13 can be supplied with hot air or cold air, and the expansion/contraction duct In addition to heating/cooling the floor 5 by the hot/cold air blown out from the expansion/contraction duct 13, contact between the expansion/contraction duct 13 and the floor 5 causes heating/cooling, which increases radiant heat, thereby actively performing air conditioning.

The expansion/contraction duct 13 is connected to the ventilation duct 12 extending from the air conditioner 3 on one side. In addition, the expansion/contraction duct 13 may be used by connecting one long duct or by connecting a plurality of ducts.

By adjusting the amount of hot air and cold air blown, the amount of hot air and cold air blown from the expansion/contraction duct 13 into the underfloor space 6 and the contact area of the expansion/contraction duct 13 with the floor 5 can be changed. Thereby, the heating and cooling of the living room 2 can be adjusted while obtaining the effect of radiation as well as wind.

The embodiment of FIG. 9 assumes an office or the like, and is laid in the underfloor space 6 so as to pass under the expansion/contraction duct 13 and the desk 32 on which the worker M works.

In this embodiment, when the present air conditioning system is in the heating operation, the worker M uses warm air blown from the underfloor space 6 to the living room 2, hot air pools in the underfloor space 6, and warm radiation from the floor 5 for heating. You get the effect.

In addition, by providing a plurality of air conditioning systems in the living room 2, a comfortable environment can be locally provided according to the usage conditions in the living room 2. As a result, it is possible to improve the comfort in the living room 2 of the relevant portion and to have the effect of saving energy.

1 floor blowing radiant air conditioning system, 2 room, 3 air conditioner, 4 duct, 5 floor,
6 underfloor space, 7 outlet, 7A fan, 8 wall, 9 inlet, 10 duct,
11 ceiling, 12 ventilation duct, 13 expansion and contraction duct, 14 girders,
15 concrete slab, 16 support member, 17 underfloor substrate, 18 floor finishing material,
19 insulation, 20 holes.

Claims (3)

A floor outlet radiant air conditioning system that blows air discharged from a duct installed under the floor and connected to an air conditioner to a living room from an air outlet provided on the floor surface,
The duct is
comprising a plurality of holes for discharging air supplied from the air conditioner,
A floor outlet radiant air conditioning system characterized in that the space under the floor expands and contracts in the vertical direction according to the flow rate of the supplied air, and at maximum expansion, the surface in which the holes are formed contacts the floor surface. system. 2. The floor outlet radiant air-conditioning system according to claim 1, wherein said duct increases in contact area with said floor surface in accordance with an increase in the supplied air. 3. The floor outlet radiant air conditioning system according to claim 1, wherein the plurality of holes are provided toward the floor surface.

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