JPH0517541Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a so-called ductless air conditioning type air conditioner that uses the inside of the ceiling as a duct.

<Conventional technology> Generally, this type of ductless air conditioning system is
A blower supplies conditioned air to the space in the attic, and the space in the attic is used as an air supply chamber.
The conditioned air is blown into the room from a number of outlets provided in the ceiling. This ductless air conditioning system reduces construction time and construction costs by omitting ductwork, simplifies the duct in the ceiling and reduces floor height by reducing the ceiling space, and provides flexibility by allowing air outlets to be placed freely. By using the attic space as an air supply chamber, the radiation effect of the ceiling and floor surfaces and the heat storage effect of the floor surface can be used effectively. Often used for harmony.

However, simply supplying conditioned air for cooling from the air supply vents to the attic space will cause the conditioned air to be warmed and diffused by the heat radiated from the lighting fixtures installed on the wide ceiling surface, which will cause the conditioned air to diffuse indoors. cannot be cooled to a uniform temperature.

Therefore, conventionally, duct equipment as shown in FIGS. 5 and 6 has been provided in the attic space. This duct equipment consists of smoke-proof partitions 32 and
32' and the ceiling 33, the open base end 35a (see FIG. 5) is connected to one wall 3.
6, the closed ends 35b are located on the other wall 36', and the ducts 35 without heat insulating material are extended, and the ducts 35 are supplied as shown by arrow A from the air conditioner 37 connected to the open base end 35a. conditioned air,
The conditioned air is discharged to both sides of the duct 35 as shown by arrow B from the outlets 38, 38, . The air is blown out into the room 40 through the outlet 39 as shown by arrow C (see FIG. 6).

<Problems to be solved by the invention> However, the above conventional duct equipment
5, the conditioned air flows only in one direction as shown by the arrow A, so the temperature of the conditioned air for cooling increases as it approaches the closed end portion 35b. That is, the duct 35 is heated from its outer periphery by the air in the ceiling 34 that is warmed by heat radiation from lighting equipment installed on the wide ceiling surface, as described above, and the conditioned air in the duct 35 goes to the tip. It gets very hot. Therefore, the open proximal end 3
The conditioned air is blown out into the room on one wall 36 side through the outlet 38 on the side 5a and the outlet 39 on the ceiling,
Similarly, from the discharge port on the side of the closed end 35b, the other wall 3
There is a considerable temperature difference between the conditioned air blown into the room on the 6' side, and the room cannot be cooled to a uniform temperature as in the past.

Therefore, an object of the present invention is to provide a ductless air conditioner that can condition the air at a uniform temperature in a room using simple and inexpensive duct equipment on the same scale as conventional air conditioners.

<Means for solving the problem> In order to achieve the above object, the ductless air conditioning system of the present invention has an open base end located on one wall and a closed end end located on the other wall. A first duct extending in the ceiling and having discharge ports provided at predetermined intervals in the longitudinal direction; The open proximal end and the closed distal end are arranged so as to create a counterflow to the conditioned airflow in the duct,
It is characterized by comprising a second duct having discharge ports provided at predetermined intervals in the longitudinal direction, and an air conditioner that supplies conditioned air to the open base ends of both the ducts.

<Operation> Now, it is assumed that conditioned air for cooling, for example, is supplied by an air conditioner. A first duct extending into the ceiling with its open base end located on one wall and the other end located on the other wall, and a conditioned air flow parallel to the side surface of the first duct. The second duct, which has an open base end and a closed end arranged to create a counterflow to the conditioned air flow in the first duct and extends into the ceiling, is used for lighting equipment installed on a wide ceiling surface. It is heated from the outside by the air in the ceiling that is warmed by heat radiation. Therefore, the cold conditioned air supplied by the air conditioner to the open base end on one wall side of the first duct increases in temperature as it flows toward the closed end, and also increases in temperature in the longitudinal direction of the duct. It is discharged into the ceiling from discharge ports provided at predetermined intervals. On the other hand, the cold conditioned air supplied by the air conditioner to the open base end of the second duct forms a counterflow with the relatively warm conditioned air that flows through the first duct. They come in contact with each other through the common side wall and are cooled, and as they flow toward the closed end, the temperature is similarly raised by heating the outer periphery of the duct. However, as the conditioned air flowing in the second duct approaches the closed end, it comes into contact with the cooler conditioned air near the open base end in the first duct via the side wall.
This conditioned air will conversely cause cooling. That is, since the conditioned air in both ducts forms counterflows, the longitudinal temperature distribution of the conditioned air in both ducts is equalized by heat transfer through the common side wall. Thus, the conditioned air discharged from the outlet of the second duct mixes with the conditioned air discharged from the outlet of the first duct in the ceiling, resulting in mixed conditioned air with a more uniform temperature. is blown into the room from the air outlet in the ceiling, uniformly cooling the room.

<Examples> The present invention will be described in detail below with reference to illustrated examples.

Figures 1 and 2 are a plan view and a cross-sectional view showing an embodiment of the present invention, in which 1 shows an upper floor slab 2 with upper and lower floors.
and a ceiling 3, an internal space in the ceiling separated by smoke-proof partitions 5, 5' extending to the lower ends of the beams 4, 4' of the upper floor slab 2 on the left and right, and walls 6, 6' of the building on both sides, respectively; 7
8 is a first duct which is not provided with a heat insulating material and extends in the center of this ceiling space 1 with an open base end 7a located on one wall 6 and a closed end 7b located on the other wall 6'. Side walls 7c, 8 on the side of the first duct 7
c is made common, and the open base end 8a is connected to the other wall 6'.
and a second duct which is not provided with a heat insulating material and extends with its closed end 8b located on the one wall 6, respectively;
9 is installed on the outer surface of one wall 6 and supplies conditioned air to the open base end 7a of the first duct 7; 10 is installed on the outer surface of the other wall 6' and supplies the second duct 8; Air conditioners 11, 11, . . . for supplying conditioned air to the open base end 8a of the ducts 7, 8 are installed at the same position at a predetermined interval in the longitudinal direction or alternately as shown in FIG. outlet,
Reference numerals 12, 12, . . . are air outlets which are distributed on the ceiling 3 and blow out conditioned air into the room 13.

Common side wall 7 of the first duct 7 and second duct 8
As shown in Fig. 1, ducts c and 8c are parallel to the side walls 7d and 8d on both sides, which are parallel to the smoke-proof partitions 5 and 5', and the widths of both ducts, which have a rectangular cross section, are as shown in Fig. 2. are equal and have the same longitudinal cross-sectional area as shown. The diameter of the discharge ports 11 provided on the upper surfaces of both ducts 7 and 8 is constant, and the conditioned air in the ducts is discharged toward the lower surface of the upper floor slab 2 through the discharge ports 11. On the other hand, the opening degree of the air outlet 12 provided in the ceiling 3 can be adjusted.

In the air conditioner with the above configuration, the air conditioners 9, 10 supply conditioned air for cooling. The first duct 7 and the second duct 8, which share the side walls 7c, 8c in the ceiling interior 1 and extend between the walls 6, 6' so that the conditioned air flows in opposite directions, are heated from the outside by the air in the ceiling that is warmed by heat radiation from lighting fixtures (not shown) arranged on the wide ceiling surface 3. Therefore, the cold conditioned air supplied to the open base end 7a of the first duct 7 by the air conditioner 9 on the wall 6 side rises in temperature as it flows toward the closed end 7b as indicated by arrow A (see Figure 1), and the discharge ports 11, 11,
... is discharged upward into the ceiling 1 in sequence, and when it hits the underside of the upper floor slab 2, it moves left and right as indicated by arrows B
The flow is divided as shown in Figure 2.

On the other hand, the air conditioner 10 on the opposite wall 6' side
The cold conditioned air supplied to the open base end 8a of the second duct 8 forms a counterflow and comes into contact with the relatively warm conditioned air flowing through the first duct via the side walls 7c and 8c. , and while cooling it, close the closed tip 8b as shown by arrow C (see Fig. 1).
As the water flows towards , the temperature rises in the same way as described above. However, the conditioned air flowing in the second duct 8 comes into contact with the colder conditioned air in the first duct 7 via the side walls 7c and 8c as it approaches the closed end 8b, so it is cooled by this conditioned air. That will happen. That is, since the conditioned air in both ducts 7 and 8 forms countercurrent flows, the longitudinal temperature distribution of the conditioned air in both ducts is leveled and made uniform by heat transfer via the side walls 7c and 8c. It is.
Thus, the discharge ports 11,1 provided in the second duct 8
The conditioned air discharged upward into the ceiling 1 sequentially from 1, .
The air mixes with the above-mentioned conditioned air (see arrow B) discharged from the duct 7, becomes more uniform in temperature, flows inside the ceiling toward the left and right smoke-proof partitions 5 and 5' as shown by arrow E, and is heated to the ceiling. The air is sequentially blown out into the room 13 from the air outlets 12, 12, . . . as indicated by arrow F.

At this time, the conditioned air flowing in the ceiling 1 as shown by the arrow E is warmed to some extent by the heat radiation of the lighting equipment (not shown) on the ceiling 3, but the opening degree of the air outlet 12 is increased as the distance from both ducts 7 and 8 increases. By increasing the amount of conditioned air blown into the room 13, the indoor cooling temperature can be made sufficiently uniform.

In the above embodiment, the discharge ports 11 of both ducts 7 and 8
is provided facing upward on the top surface of the duct, so the conditioned air with a difference in temperature discharged from both ducts collides with the bottom surface of the upper floor slab 2 and is sufficiently mixed, making the temperature more uniform and improving the mixing and conditioning. The air is evenly distributed in all directions, allowing the room to be cooled more evenly.

In addition, although the side walls 7c and 8c of the 1st duct and the 2nd duct are common in the above, this may be made into a separate and independent side wall.

FIG. 3 is a plan view showing a modification of the present invention. This modification includes a single air conditioner 20 provided on the outer surface of one wall 6, an open base end 21a connected to this air conditioner 20, and a center of the ceiling 1 extending to the vicinity of the other wall 6'. It extends with a uniform cross-sectional area as an outward path, bends 180 degrees from here, and extends while gradually decreasing the cross-sectional area as a return path to the closed end 21b near the one wall 6, and has a series of discharge ports 11 on the upper surface of the portion where the cross-sectional area gradually decreases. A first duct 21 that is not provided with a heat insulating material, and a side wall 21c and 22c provided on the side surface of the first duct 21 in common, and connected to the air conditioner 20 from the open base end 22a to the other wall 6'. The second duct 22 has a cross-sectional area that gradually decreases up to the nearby closed end 22b, has a series of discharge ports 11 on its upper surface, and is not coated with heat insulating material, and the other components are the same as those shown in FIGS. 1 and 2 with the same numbers. and a member.

The operation of the modified example of the above structure is basically no different from the operation of the above-described embodiment, and the common side wall 21c,
The conditioned air in the first duct 21 and second duct 22 on both sides of 22c flow in opposite directions as shown by arrows G and H to exchange heat, and also flow upward from the discharge ports 11 of both ducts as indicated by arrows I and J, respectively. The discharged conditioned air with different temperatures collides with the slab on the upper floor and mixes, resulting in a more uniform temperature, which cools the room more evenly. In addition, in the above modification, mixing was described in which conditioned air is supplied from the air conditioner 20 to two ducts, the first duct 21 and the second duct 22. However, in this modification, the first duct 2
The same effect as described above can be achieved by simply providing discharge ports at predetermined intervals on one outgoing path. In this case, the second duct 22 becomes unnecessary.

FIG. 4 is a sectional view showing an example in which the discharge ports of both ducts are formed so as to merge with each other. Discharge port 11 of first duct 7 and discharge port 11' of second duct 8
As shown in FIG. 4a, two-pronged merging pipes 23 may be connected to both discharge ports to merge them, and as shown in FIG. 4b,
As shown in the figure, the large diameter discharge port 1 of the second duct 8
A discharge pipe 24 communicating with the inside of the first duct 7 may be inserted into the first duct 1' to join the discharge pipe 24 thereinto. This allows the discharged conditioned air from both ducts to be mixed even better. In the case of FIG. 4b, it is easier to adjust the discharge flow rate by making the tip of the discharge pipe 24 protrude beyond the upper end of the discharge port 11'.

In the above embodiment, the case where the conditioned air is used for cooling has been explained, but even when the conditioned air is used for heating, the only difference is that it becomes colder due to natural heat radiation as it is sent through the duct, and the conditioned air is also used for heat exchange by counterflow. However, in terms of preventing this, they are basically the same, and it goes without saying that the present invention can be applied in the same way.

Note that the duct of the present invention does not necessarily have a cross-sectional area that gradually decreases toward the tip as in the above embodiment, and the discharge port of the duct does not necessarily need to be provided on the upper surface of the duct.

<Effects of the invention> As is clear from the above explanation, according to the ductless air conditioning system of the invention, the first duct and the second duct, which have a common side wall and extend into the ceiling, The conditioned air flows through the two ducts as countercurrents, and the heat loss during the duct supply is compensated for by heat exchange between the countercurrents, making it possible to equalize the temperature of the conditioned air. It is possible to discharge the mixture into the ceiling, make the temperature even more uniform, and then blow it into the room from the ceiling outlet.This allows air conditioning to be maintained at a uniform temperature even in large rooms that require long ducts, and the side walls are common. Therefore, there is no heat intrusion from here, and the material cost of the duct can be reduced.Furthermore, the same effect can be obtained even with a thin duct without heat insulating material, so it has various advantages such as being economical.

[Brief explanation of the drawing]

Figure 1 is a plan view (second view) showing one embodiment of the present invention.
Figure 2 is a sectional view taken along the line - in Figure 1, Figure 3 is a plan view showing a modification of the present invention, and Figure 4 is a modification of the discharge ports of both ducts of the invention. 5 is a plan view showing a conventional ductless air conditioning type air conditioner (see the line in FIG. 6), and FIG. 6 is a sectional view taken along the line in FIG. 5. 1... Space inside the ceiling, 2... Upper floor slab, 3...
Ceiling, 4,4'...Beam, 5,5'...Smokeproof partition,
6, 6'... Wall, 7... First duct, 7a... Open base end, 7b... Closed tip, 7c... Side wall, 8...
...Second duct, 8a...Open base end, 8b...Closed tip, 8c...Side wall, 9, 10...Air conditioner,
11...Discharge port, 12...Air outlet, 13...Indoor.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In an air conditioner that uses the ceiling as an air supply chamber and blows out conditioned air into the room from an outlet provided in the ceiling, the open base end is attached to one wall and the other a first duct having discharge ports provided at predetermined intervals in the longitudinal direction, the first duct extending into the ceiling with the closed ends thereof being located on the wall; and the first duct extending parallel to the side surface of the first duct. A second duct having an open proximal end and a closed distal end arranged so that the conditioned air flow is opposite to the conditioned air flow in the first duct, and having discharge ports provided at predetermined intervals in the longitudinal direction. duct, and an air conditioner that supplies conditioned air to the open base ends of both the ducts. (2) In the air conditioner according to claim 1 of the utility model registration, the first duct and the second duct extend with a common side wall. Device. (3) The air conditioner according to claim 1 or 2 of the utility model registration claim, wherein the discharge port opens in a direction perpendicular to a ceiling plane. (4) Scope of claims for utility model registration, paragraphs 1 to 3
In the air conditioner described in any of paragraphs,
An air conditioner characterized in that the outlet of the first duct and the outlet of the second duct are formed so that conditioned air from both outlets merge with each other.