WO2009028826A1

WO2009028826A1 - Air conditioning system

Info

Publication number: WO2009028826A1
Application number: PCT/KR2008/004825
Authority: WO
Inventors: Sangsik Choi
Original assignee: Vstech Co., Ltd.
Priority date: 2007-08-27
Filing date: 2008-08-20
Publication date: 2009-03-05
Also published as: KR100767022B1

Abstract

Disclosed is an air conditioning system. An integrated duct (A-I) has an interior thereof partitioned into an air intake passage (11) and an air exhaust passage (12) by a partition (13). An air chamber (A-2) is connected to the integrated duct (A-I), and includes a main air intake passage (21) and a main air exhaust passage (22) in the interior thereof, and a sub air intake passage (212) branching off from the main air intake passage (21) and a sub air exhaust passage (223) branching off from the main air exhaust passage (22) on one side thereof. A duct coupler (A-3) is installed at a joint of the integrated duct (A-I). A flexible corrugated pipe (A-4) is connected to the integrated (A-I) and branches off in one direction. A diffuser (A-5) is installed on one end of the flexible corrugated pipe (A-4) and on a ceiling so as to communicate with the air chamber.

Description

AIR CONDITIONING SYSTEM

Technical Field

[I] The present invention relates to an air conditioning system and, more particularly, to an air conditioning system in which air intake ducts and air exhaust ducts installed on a ceiling of each floor of a building are prevented from overlapping or crossing, thereby minimizing an installation space and thus a space occupancy rate.

[2]

Background Art

[3] As Related Building Acts such as Building Equipment Standards are revised and enforced, apartments are ought to be equipped with ventilating facilities. Thus, an air conditioning system having an air intake duct and an air exhaust duct is installed in a ceiling of each floor of the apartment.

[4] FIG. 1 is a floor plan for an apartment having a conventional air conditioning system.

[5] As illustrated in FIG. 1, an air intake duct 110 and an air exhaust duct 130 must be installed in a ceiling of each floor of the apartment together with a spring cooler, a smoke detector, and so on.

[6] The air intake duct 110 and the air exhaust duct 130 are connected to a ventilation unit 100, which draws in outdoor air and discharges indoor air to the outside. The air intake duct and the air exhaust duct are connected with branch ducts, which branch off from a branch chamber installed midway to respective rooms. The branch duct is provided with a diffuser at one end thereof. The diffuser is connected to an air intake port 115 and an air exhaust port 135, which are installed on the ceiling of each room.

[7] Typically, the air intake duct 110 feeds the outdoor air to the rooms in order to freshen the indoor air, while the air exhaust duct 130 discharges polluted indoor air to the outside.

[8] Meanwhile, when the air intake duct 110 and the air exhaust duct 130 are installed in the ceiling, at least one intersection X exists between the air intake duct 110 and the air exhaust duct 130.

[9] Thus, since the air intake duct 110 and the air exhaust duct 130 overlaps with each other at the intersection X, an installation height for them are installed is twice as high as that for a single duct. In order to cover this installation height, an inner space of the ceiling must be increased, which leads to an increase in construction costs.

[10] FIG. 2 is a sectional view illustrating an example in which a conventional diffuser overlaps with an air intake duct when installed.

[I I] As illustrated in FIG. 2, a space between a ceiling slab 180 and a ceiling panel 185 has a height of 200mm. The air intake duct 110 and the air exhaust duct 130 are crossed in the space between a ceiling slab 180 and a ceiling panel 185, and thus require a height of at least 150mm. The remaining height of 50mm is for installing the spring cooler (not shown), the smoke detector (not shown), and so on.

[12] At this time, a diffuser 160 connected to the air intake duct 110 and is exposed to the interior of each room is installed on the ceiling panel 185. In detail, the diffuser 160 is connected with either an air intake port for feeding outdoor air into the room, or a ventilation port for discharging the indoor air to the outside in order to circulate the indoor air.

[13] However, the conventional diffuser 160 is connected with either the air intake port or the ventilation port via a flexible corrugated pipe 163 connected to the air intake duct 110 or the air exhaust duct 130. The flexible corrugated pipe 163 must be bent at a right angle in order to connect the diffuser 160 at one end thereof and the air intake duct 110 or the air exhaust duct 130 at the other end thereof. In order to maintain this shape, a minimum is required.

[14] Such a minimum space requires the inner space of the ceiling which has a height of about 150mm as illustrated in FIG. 2. Here, only when the height of the inner space of the ceiling amounts to at least 200mm including the installation space of the diffuser, is construction possible.

[15] If the air intake duct 110 and the air exhaust duct 130 are lowered in order to reduce the height of the inner space of the ceiling, the conventional diffuser 160 cannot be installed.

[16] Even if the diffuser 160 is installed, the flexible corrugated pipe 163 is crushed or crumbled in a downward direction. Thus, the air cannot smoothly flow, resulting in poor ventilation.

[17] Further, the conventional diffuser is fixed to the ceiling using fastening members such as screws. As such, it is difficult to firmly fix the conventional diffuser to the weak ceiling panel. In certain cases, the ceiling panel is damaged.

[18] Meanwhile, referring to FIG. 2, the air intake duct 110 or the air exhaust duct 130 have a polygonal (e.g. rectangular) cross section, and the diffuser 160 and the flexible corrugated pipe 163 have a circular cross section.

[19] Thus, in order to connect the flexible corrugated pipe 163 with the air intake duct 110 or the air exhaust duct 130, a fitting E, opposite ends of which have a different shape, is mounted.

[20] In detail, one end of the fitting E is a connecting means, one end of which has a polygonal (e.g. rectangular) shape so as to be fitted with the air intake duct 110 or the air exhaust duct 130, and the other end of which has a circular shape so as to be fitted with the flexible corrugated pipe 163. [21] Thus, the rectangular end of the fitting E is coupled to the end of the air intake duct

110 or the air exhaust duct 130, and the circular end of the fitting E is coupled to the flexible corrugated pipe 163.

[22] Meanwhile, the air intake port or the air exhaust port in which the diffuser 160 is mounted is bored through the ceiling panel 185. Then, a worker puts his/her hand into the air intake port or the air exhaust port, and pulls the end of the flexible corrugated pipe 163 out of the air intake port or the air exhaust port. Next, the end of the flexible corrugated pipe 163 is coupled with the diffuser 160, and then is put and fitted into the air intake port or the air exhaust port again. Finally, the diffuser 160 is fixed to the ceiling panel.

[23] However, the fitting E must be additionally installed on the flexible corrugated pipe

163, so that the piping has a complicated structure, and reduces work efficiency. As a result, manufacturing and construction costs are increased.

[24] Further, since such a flexible corrugated pipe 163 is made of soft synthetic resin, there is a possibility of being torn during installation. Furthermore, the flexible corrugated pipe 163 hardly absorbs a sound, and thus causes noise while the air flows.

[25] Meanwhile, a plurality of linear ducts is connected with each other in order to prolong the air intake duct 110 and the air exhaust duct 130, and an elbow duct is connected to the linear duct in order to change a direction.

[26] The connection between the ducts is carried out by direct fitting or using an adhesive.

[27] In the case of the direct fitting, a joint gets loose to generate a gap through which the air leaks out. Thus, it is difficult to obtain good connection.

[28] Further, in the case of the use of the adhesive, components of the adhesive, particularly harmful to the human body, flow into the room along with the air.

[29]

Disclosure of Invention Technical Problem

[30] Accordingly, the present invention has been made in an effort to solve the problems occurring in the related art, and an embodiment of the present invention provides an air conditioning system, capable of minimizing space occupancy by integrating an air intake duct and an air exhaust duct, exchanging heat between outdoor air and indoor air, and reducing a height between floors of a building by installing an air chamber having branch openings at branched positions.

[31] Another embodiment of the present invention provides an air conditioning system, capable of easily adjusting an air volume by improving a diffuser, and providing simple installation.

[32] Another embodiment of the present invention provides an air conditioning system, in which a flexible corrugated pipe is differently shaped at opposite ends thereof and is formed of synthetic resin or rubber such that a bellows part is formed on an intermediate portion thereof, thereby facilitating connection without a connecting means such as a fitting (having different openings) and reducing manufacturing costs.

[33] Another embodiment of the present invention provides an air conditioning system, capable of facilitating connection of linear ducts and/or elbow-type ducts, and securing reliability due to no gap after connected.

[34]

Technical Solution

[35] According to embodiments of the present invention, there is provided an air conditioning system, which comprises: an integrated duct, an interior of which is partitioned into an air intake passage and an air exhaust passage by a partition; an air chamber connected to the integrated duct and having a main air intake passage and a main air exhaust passage in the interior thereof, and a sub air intake passage branching off from the main air intake passage and a sub air exhaust passage branching off from the main air exhaust passage on one side thereof; and a diffuser installed on a ceiling so as to communicate with the air chamber.

Advantageous Effects

[36] According to embodiments of the present invention, the air conditioning system has a sufficient interval between a slab and a duct of an indoor ceiling, and thus is very easily installed along with facilities such as a spring cooler, a smoke detector, and so on.

[37] Further, if a height between floors of a building (e.g. 29-story building) is reduced by about 100mm, the building can be designed to have 30 stories. Thus, the building is expected to have a great effect on feasibility, and this effect goes far toward industrial development due to reduction in the use of concrete and reinforced bars.

[38]

Brief Description of the Drawings

[39] FIG. 1 is a floor plan for an apartment having a conventional air conditioning system;

[40] FIG. 2 is a sectional view illustrating an example in which a conventional diffuser overlaps with an air intake duct when installed;

[41] FIG. 3 FIG. 3 is a floor plan for a building on which an air conditioning system according to an embodiment of the present invention is installed;

[42] FIG. 4 is an exploded view illustrating a part of the air conditioning system of FIG.

3;

[43] FIG. 5 is a perspective view illustrating the "Integrated duct" of an air conditioning system according to an embodiment of the present invention; [44] FIG. 6 is an enlarged view illustrating the "air chamber" of an air conditioning system according to an embodiment of the present invention;

[45] FIG. 7 is a cross sectional view taken along line I-I of FIG. 6;

[46] FIG. 8 is a perspective view illustrating a "duct coupler" applied to an air conditioning system according to an embodiment of the present invention;

[47] FIG. 9 is a cross sectional view illustrating an example in which a "duct coupler" applied to an air conditioning system according to an embodiment of the present invention is installed;

[48] FIG. 10 is a perspective view illustrating a "flexible corrugated pipe" applied to an air conditioning system according to an embodiment of the present invention;

[49] FIG. 11 illustrates the state in which a "flexible corrugated pipe" for an air conditioning system according to an embodiment of the present invention is installed;

[50] FIG. 12 is a perspective view illustrating a "diffuser" applied to an air conditioning system according to an embodiment of the present invention;

[51] FIG. 13 is an exploded perspective view illustrating a "dffuser" applied to an air conditioning system according to an embodiment of the present invention; and

[52] FIG. 14 illustrating an example in which a "diffuser" applied to an air conditioning system according to an embodiment of the present invention is installed.

[53] <Description of symbols of the main parts in the drawings>

[54] A-I: integrated duct A-2: air chamber

[55] A-3: duct coupler A-4: flexible corrugated pipe

[56] A-5: diffuser 11: air intake passage

[57] 12: air exhaust passage 13: partition

[58] 21: main air intake passage

[59] 22: main air exhaust passage

[60] 31: outer wall 32: slot

[61] 33: connection wall 41: rectangular opening

[62] 42: circular opening 43: bellow part

[63] 51: air volume adjustment damper

[64] 52: body 53: screw rod

[65] 54: lower panel 55: coil spring

[66]

Mode for the Invention

[67] Hereinafter, exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

[68] FIG. 3 is a floor plan for a building on which an air conditioning system according to an embodiment of the present invention is installed. FIG. 4 is an exploded view il- lustrating a part of the air conditioning system of FIG. 3.

[69] As illustrated in FIGS. 3 and 4, the air conditioning system according to an embodiment of the present invention includes an integrated duct A-I, the interior of which is partitioned into an air intake passage 11 and an air exhaust passage 12 by a partition 13, an air chamber A-2 connected to the integrated duct A-I and having a main air intake passage 21 and a main air exhaust passage 22 in the interior thereof, and a sub air intake passage 212 branching off from the main air intake passage 21 and a sub air exhaust passage 223 branching off from the main air exhaust passage 22 on one side thereof, a duct coupler A-3 installed at a joint of the integrated duct A-I, a flexible corrugated pipe A-4 connected to the integrated duct A- 1 and branching off in a lateral direction, and a diffuser A-5 installed on one end of the flexible corrugated pipe A-4 and mounted on a ceiling panel.

[70] FIG. 5 is a perspective view illustrating the "integrated duct" of an air conditioning system according to an embodiment of the present invention.

[71] As illustrated in FIG. 5, the integrated duct A-I is a hollow pipe having a polygonal

(e.g. rectangular) cross section. The partition 13 is vertically formed in the middle of the integrated duct A-I, thereby defining the air intake passage 11 and the air exhaust passage 12 on opposite sides of the integrated duct A-I.

[72] Here, the integrated duct A-I is made of a material similar to synthetic resin (e.g. polyvinyl chloride (PVC), or acrylonitrile butadiene styrene (ABS)). If the integrated duct A- 1 is made of a metal sheet such as a terneplate (that is a steel sheet plated with an alloy of three or four parts of lead to one part of tin, used as a roofing material), the integrated duct A- 1 is preferably covered with a heat insulator on an outer surface thereof.

[73] Further, the partition 13 can use a sheet made of the same material as the integrated duct A-I, and preferably of a material having high thermal conductivity.

[74] The partition 13 employs metal having high thermal conductivity in order to improve heat exchange efficiency, and preferably tin, copper, aluminum, or so on. In addition to these metal materials, any metal material will do if heat can be conducted.

[75] In this embodiment, the partition 13 uses copper.

[76] Thus, low-temperature air flowing through the air intake passage 11 can exchange heat with high-temperature air flowing through the air exhaust passage 12 through the partition 13, thereby undergoing an increase in temperature to promote energy saving.

[77] FIG. 6 is an enlarged view illustrating the "air chamber" of an air conditioning system according to an embodiment of the present invention, and FIG. 7 is a cross sectional view taken along line I-I of FIG. 6.

[78] As illustrated in FIGS. 6 and 7, the air chamber A-2 includes the main air intake passage 21 and the main air exhaust passage 22 in the interior thereof, and the sub air intake passage 212 branching off from the main air intake passage 21 and the sub air exhaust passage 223 branching off from the main air exhaust passage 22 on one side thereof.

[79] The main air intake passage 21 is provided with first and third openings 211 and 213 at opposite ends thereof, and the main air exhaust passage 22 is provided with second and fourth openings 222 and 224 at opposite ends thereof.

[80] The sub air intake passage 212 branches off from the main air intake passage 21 at a right angle, is in contact with a middle upper face of the main air exhaust passage 22, and is provided with a fifth opening 225 at one end thereof.

[81] The main air exhaust passage 22 includes the sub air exhaust passage 223 in the same direction as the sub air intake passage 212 on one side thereof, and the sub air exhaust passage 223 is provided with a sixth opening 226 at one end thereof.

[82] Paths running from the second opening 222 and the fourth opening 224, which are formed at the respective ends of the main air exhaust passage 22, to the sub air intake passage 212 are formed into downwardly inclined faces 227.

[83] The sub air intake passage 212 preferably has a height h corresponding to a half of the total height H of the air chamber A-2.

[84] Thus, as illustrated in FIG. 7, the inclined faces 227 are formed from upper ends of the second and fourth openings 222 and 224 to a lower end of the sub air intake passage 212.

[85] In detail, if the total height H of the air chamber A-2 is 80mm, the height h of the sub air intake passage 212 is 40mm. The sub air intake passage 212 is installed on an inner upper face of the air chamber A-2, so that the air can flow through the space, i.e. the main air exhaust passage 22, having the remaining height 40mm under the sub air intake passage 212.

[86] At this time, when the air introduced through the second opening 222 directly collides with a sidewall of the sub air intake passage 212 in front of the main air exhaust passage 22, there is a possibility of generating noise. As such, the paths running from the upper ends of the second and fourth openings 222 and 224 of the main air exhaust passage 22 to the lower end of the sub air intake passage 212 are formed into the downwardly inclined faces 227, so that a flow rate can be smoothly induced, and the generation of the noise can be inhibited.

[87] Thus, in the case of the related art, the air intake duct and the air exhaust duct must overlap when the direction is changed, and thus a space that at least has a height summing up the heights of the air intake duct and the air exhaust duct is required. According to an embodiment of the present invention, the height summing up the heights of the sub air intake passage 212 and the main air exhaust passage 22 of the air chamber A-2 is a half of that required for the related art, so that the branch is possible without increasing the height, and thus the installation space can be minimized.

[88] Further, a cross sectional area of the main air exhaust passage 22 is reduced due to the sub air intake passage 212. In order to make up for this reduction of the cross sectional area, a width of the main air exhaust passage 22 is increased to secure a necessary flow rate.

[89] FIG. 8 is a perspective view illustrating a "duct coupler" applied to an air conditioning system according to an embodiment of the present invention. FIG. 9 is a cross sectional view illustrating an example in which a "duct coupler" applied to an air conditioning system according to an embodiment of the present invention is installed.

[90] The duct coupler A-3 is formed of soft plastic by injection molding so as to have an accommodation space 3 in an interior thereof, has an outer wall 31 of an H-shaped cross section, and is provided with symmetrical slots 32 having a U shape at opposite ends thereof.

[91] The duct coupler A-3 is for connecting the linear integrated duct A-I and an elbow type duct E connected to the linear integrated duct A- 1 without leakage connection, and is preferably formed of soft plastic having elasticity and high durability by injection molding.

[92] Further, referring to FIG. 9, the slots 32 are formed at front and rear ends of the duct coupler A-3 for easy connection. A front or rear end of the outer wall 31 defining the slots 32 is provided with first and second slopes 321 and 322, which are inclined in the same direction.

[93] Of the first and second slopes 321 and 322, the first slope 321 is located inside, and is inclined from the inside to the outside so as to adapt to a flow of air.

[94] The accommodation space 3 is divided into two parts by a connection wall 33, which has an H-shaped cross section and is provided with symmetrical slots 330 at opposite ends thereof.

[95] A front or rear end of the connection wall 33 defining the slot 330 is provided with third and fourth slopes 333 and 334, which are inclined in opposite directions.

[96] Hereinafter, an example of installing the duct coupler A-3 will be described.

[97] The duct coupler A-3 is connected with the integrated duct A-I at one end thereof, and the elbow type duct E at the other end thereof.

[98] The front ends of the integrated duct A-I and the elbow type duct E is fitted into the slots 32 of the outer wall 31 of the duct coupler A-3, and the inner partitions 13 of the integrated duct A-I and the elbow type duct E is fitted into the slots 330 of the connection wall 33 of the duct coupler A-3.

[99] Thus, the first slope 321 of the outer wall 31 of the duct coupler A-3 comes in close contact with an inner wall of the integrated duct A-I and the elbow type duct E, so that it can minimize resistance of the air. [100] Further, the third and fourth slopes 333 and 334 of the connection wall of the duct coupler A-3 come into close contact with opposite faces of the partition 13, so that they can minimize resistance of the air.

[101] FIG. 10 is a perspective view illustrating a "flexible corrugated pipe" applied to an air conditioning system according to an embodiment of the present invention.

[102] The flexible corrugated pipe A-4 is provided with a polygonal (e.g. rectangular) opening 41 at one end thereof, a circular opening at the other end thereof, and a bellows part 43 integrally formed between the opposite ends thereof.

[103] The bellows part 43 has a polygonal (e.g. rectangular) cross section within a predetermined distance from the rectangular opening 41, and a circular cross section within a predetermined distance from the circular opening 42, and undergoes transition in cross section between the rectangular cross section and the circular cross section.

[104] The flexible corrugated pipe A-4 is provided with a fitting step 44 at the rectangular opening 41 or the circular opening 42.

[105] An example of installing the flexible corrugated pipe constructed in this way will be described.

[106] FIG. 11 illustrates the state in which a "flexible corrugated pipe" for an air conditioning system according to an embodiment of the present invention is installed.

[107] Referring to FIG. 11, the rectangular opening 41 of the flexible corrugated pipe A-4 is connected to the integrated duct A-I having the rectangular cross section, and the bellows part 43 is bent at a predetermined angle. Then, the flexible corrugated pipe A- 4 is drawn out through a hole of the ceiling 100.

[108] Afterwards, the diffuser A-5 is connected to the circular opening of the drawn flexible corrugated pipe A-4, and then is coupled to the hole of the ceiling 100.

[109] Thus, in order to connect the integrated duct A-I having the rectangular cross section with the diffuser A-5 having a circular cross section, the fitting is not required, so that the installation can be much simpler, and be made within a shorter period.

[110] Further, according to an embodiment of the present invention, in the case in which the flexible corrugated pipe A-4 is made of rubber material, it can partly absorb the noise of the flowing air, namely exert a noise removal function.

[I l l] FIG. 12 is a perspective view illustrating a "diffuser" applied to an air conditioning system according to an embodiment of the present invention. FIG. 13 is an exploded perspective view illustrating a "diffuser" applied to an air conditioning system according to an embodiment of the present invention. FIG. 14 illustrating an example in which a "diffuser" applied to an air conditioning system according to an embodiment of the present invention is installed.

[112] As illustrating FIGS. 13 and 14, the diffuser A-5 is installed on a ceiling, and includes a body 52 connected to the flexible corrugated pipe A-4, an air volume adjustment damper 51 installed in the body 52, a screw rod 53 screwed onto the air volume adjustment damper 51 in order to move the air volume adjustment damper 51 in an upward or downward direction, and a lower panel 54 installed below the air volume adjustment damper 51 so as to be flush with the ceiling.

[113] The body 52 has a funnel shape in which its diameter increases from the top to the bottom, and is provided with a plurality of horizontal support bars 523 on an upper portion thereof which extends from a central member 521 in a radial direction. The central member 521 is provided with a center hole 522. The body 52 is integrally formed with a flange 525 on a lower portion thereof which serves as a stopper in contact with a ceiling panel.

[114] The body 52 is characterized in that a diameter of the lower portion thereof is greater than that of the upper portion thereof. Due to this diametrical difference, the air volume adjustment damper 51 can move inside the body 52 in an upward or downward direction, and thus can adjust the amount of flowing air.

[115] Further, the body 52 is integrally formed with vertical guide members 526 on opposite sides of an interior thereof. The vertical guide members 526 extend from an upper portion to a lower portion of the interior of the body 52.

[116] Also, the body 52 is integrally formed with spring hook members 524 on an outer circumference thereof in a diametrical direction.

[117] The spring hook members 524 are coupled with coil springs 55, which apply elastic force so as to deflect from the ceiling in an upward direction. The diffuser A- 5 can be fixedly supported on the inside of the ceiling by the coil springs 55.

[118] For example, after the diffuser A- 5 is inserted into the ceiling with the coil springs 55 standing upright, the diffuser A-5 is released at a proper position. Then, due to the spreading of the coil springs 55, the diffuser A-5 can be supported on an inner face of the ceiling.

[119] The air volume adjustment damper 51 is integrally formed with a threaded hole 512 in the center thereof, and is provided with a pair of grooves 513 corresponding to shapes of the vertical guide members 72. Thus, the air volume adjustment damper 51 can move up and down along the vertical guide members 526.

[120] The screw rod 53 includes a threaded part 532 formed on an intermediate portion thereof corresponding to displacement of the air volume adjustment damper 51, and a circular head part 533 extending from the threaded part 532 and inserted into the center hole 522 of the central member 521 so as to run idle.

[121] Further, the screw rod 53 is integrally fixed to the lower panel 54 at a lower end thereof, and thus can be rotated by rotation of the lower panel 54.

[122] After the screw 53 is inserted into the center hole 522 of the central member 521, a cover 534 is coupled to the central member 521. [123] Thus, the air volume adjustment damper 51 can move up and down in a direction in which the screw rod 53 is rotated by the rotation of the lower panel 54. As a result, the air volume adjustment damper 51 can adjust the amount of air flowing into or out of the room in proportion to the extent to which it approaches a taped inner circumference of the body 52.

[124] For example, when the lower panel 54 is rotated in a clockwise direction, the screw rod 53 is rotated together, and thus the air volume adjustment damper 51 screwed onto the screw rod moves in a downward direction.

[125] Thus, the air volume adjustment damper 51 moves away from the inner circumference of the body 52, and thus a channel of the air becomes wide to increase the air volume.

[126] In contrast, when the lower panel 54 is rotated in a counter clockwise direction, the screw rod 53 is rotated together, and thus the air volume adjustment damper 51 screwed onto the screw rod moves in an upward direction.

[127] Thus, the air volume adjustment damper 51 moves toward the inner circumference of the body 52, and thus a channel of the air becomes narrow to decrease the air volume.

[128] Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.

Claims

[1] An air conditioning system comprising: an integrated duct, an interior of which is partitioned into an air intake passage and an air exhaust passage by a partition; an air chamber connected to the integrated duct and having a main air intake passage and a main air exhaust passage in the interior thereof, and a sub air intake passage branching off from the main air intake passage and a sub air exhaust passage branching off from the main air exhaust passage on one side thereof; and a diffuser installed on a ceiling so as to communicate with the air chamber.

[2] The air conditioning system as set forth in claim 1, wherein the sub air intake passage branches off from the main air intake passage at a right angle, is in contact with a middle upper face of the main air exhaust passage, and includes a fifth opening at one end thereof.

[3] The air conditioning system as set forth in claim 1, wherein the sub air intake passage has a height half of a total height of the air chamber.

[4] The air conditioning system as set forth in claim 1, wherein the main air exhaust passage includes a second opening and a fourth opening at opposite ends thereof which are inclined to the sub air intake passage so as to form downwardly inclined faces.

[5] The air conditioning system as set forth in claim 1, further comprising a duct coupler installed at a joint of the integrated duct.

[6] The air conditioning system as set forth in claim 5, wherein the duct coupler includes an accommodation space in an interior thereof, and fitting slots at front and rear ends thereof, each of which has first and second slopes, for easy connection.

[7] The air conditioning system as set forth in claim 6, wherein the first and second slopes are inclined in the same direction and the first slope is inclined from an inside to an outside so as to adapt to a flow of air.

[8] The air conditioning system as set forth in claim 6, wherein: the accommodation space is divided into two parts by a connection wall, at opposite ends of which have symmetrical slots; and the connection wall includes third and fourth slopes at front or rear end thereof which are inclined in opposite directions.

[9] The air conditioning system as set forth in claim 1, further comprising a flexible corrugated pipe, which is connected to the integrated and branches off in one direction.

[10] The air conditioning system as set forth in claim 9, wherein the flexible corrugated pipe includes a polygonal opening at one end thereof, a circular opening at the other end thereof, and a bellows part 43 integrally formed between the opposite ends thereof.

[11] The air conditioning system as set forth in claim 1, wherein the diffuser includes: a body having a funnel shape in which a diameter of an upper portion thereof is greater than that of a lower portion thereof; an air volume adjustment damper installed inside the body and having a threaded hole in a center thereof; a screw rod screwed onto the threaded hole of the air volume adjustment damper in order to move the air volume adjustment damper in upward and downward directions; and a lower panel installed under the air volume adjustment damper and fixed to a lower end of the screw rod.

[12] The air conditioning system as set forth in claim 11, wherein the body includes vertical guide members, which are integrally formed on an inner circumference thereof in a diametrical direction and extending from the upper portion to the lower portion thereof, and the air volume adjustment damper includes a pair of grooves corresponding to the vertical guide members.

[13] The air conditioning system as set forth in claim 12, wherein the body includes a plurality of horizontal support bars on the upper portion thereof which extends from a central member in a radial direction, and is integrally formed with a flange on a lower portion thereof which serves as a stopper in contact with a ceiling panel, the central member having a center hole.

[14] The air conditioning system as set forth in claim 13, wherein the screw rod includes a threaded part formed on an intermediate portion thereof corresponding to displacement of the air volume adjustment damper, and a circular head part extending from the threaded part and inserted into the center hole of the central member so as to run idle.

[15] The air conditioning system as set forth in claim 14, wherein the body is integrally formed with spring hook members on an outer circumference thereof in a diametrical direction, and the spring hook members are coupled with coil springs.