Indoor cooling system

Abstract

To provide an indoor cooling system for efficiently cooling an indoor side of a building by making a good use of an air conditioner also for suppression of heat conduction from a roof to a ceiling.SOLUTION: Heat conduction of heat generated on a roof 3 side is blocked due to cold atmosphere within a small attic space 7, and a ceiling 5 is cooled. Thus, cold radiation radiated from a person present in a space 9 below the ceiling toward the ceiling 5 is generated. Since an air discharge part 17 and an air supply part 19 are appropriately arranged, part of cold air within the small attic space 7 is blown out and supplied to the space 9 below the ceiling, and warm air in the space 9 below the ceiling is returned into the small attic space 7 and is discharged. Due to this structure, heat of the person in the space 9 below the ceiling is absorbed also by this cold air convection. Since the warm air is recovered by a duct 15, the cold atmosphere in the small attic space 7 is not destroyed. Mounting this indoor cooling system to a building 1 enables good use of cold air generated through a cooling operation of one air conditioner 13, and an indoor side can be cooled efficiently.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to indoor cooling systems for buildings. [Background technology]

[0002] In order to cool the interior of a building, it is common to provide an air conditioner in each room, as shown in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-148350 Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, with the continuing heatwaves, air-conditioned dining has become an indispensable part of our lives, but if you install an air conditioner in each room and operate it individually, the installation costs and electricity bills will increase as the number of rooms increases and the rooms become larger. Furthermore, if you install air conditioners in the hallways and bathrooms, the cost burden will become too great. Therefore, it has been proposed to insulate the ceiling to reduce the effects of heat from the sun, but there is a limit to the insulating effect.

[0005] The present invention was made with a focus on the above-mentioned conventional problems, and aims to provide a new and useful indoor cooling system that can efficiently cool the interior of a building even if the number of air conditioners installed is reduced or the set temperature is raised, by making good use of air conditioners not only for cold air convection, which has been conventionally assumed, but also for suppressing heat conduction from the roof to the ceiling and even generating cold radiation. [Means for solving the problem]

[0006] The present invention has been made to solve the above-mentioned problems, and is an indoor cooling system comprising an air conditioner installed in the attic of a building, a plurality of air intake sections installed on the ceiling and each equipped with an air intake fan that supplies air from the attic to the space under the ceiling, and a plurality of exhaust sections equipped with an exhaust fan that exhausts air from the space under the ceiling to the attic, and a duct arranged in such a manner that one end opening is connected to or close to the exhaust port of the exhaust section and the other end opening is connected to or close to the intake port of the air conditioner, wherein the ceiling is cooled by the cold air blown out from the air conditioner and convection is forced to occur in the space under the ceiling via the air intake section and the exhaust section.

[0007] Preferably, the air conditioner outlet faces the ceiling. Preferably, the attic has an airtight structure and includes a duct for blowing cool air from an air conditioner into the space under the ceiling. Preferably, the roof is of insulated construction. Preferably, the roof is provided with a heat insulating sheet and is constructed to ensure roof ventilation. Preferably, a plurality of exhaust sections are provided at locations farther away from the air intake section closest to the air conditioner. [Effects of the Invention]

[0008] According to the indoor cooling system of the present invention, the air conditioners are effectively used not only for cold air convection but also for suppressing heat conduction from the roof to the ceiling and even for generating cold radiation, so that the indoors of a building can be cooled efficiently even if the number of air conditioners installed is reduced or the set temperature is increased. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a vertical cross-sectional view of a building equipped with an indoor cooling system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a detailed view of the roof structure of the building in FIG. 1. [Figure 3] FIG. 2 is a cross-sectional view of the building of FIG. 1. [Figure 4] FIG. 2 is a perspective view of an air conditioner installed in the attic of FIG. 1. [Figure 5] FIG. 4 is a perspective view of an exhaust unit disposed on the ceiling of FIG. 3. [Figure 6] FIG. 4 is a perspective view of an air supply unit disposed on the ceiling of FIG. 3. [Figure 7] FIG. 4 is a perspective view of an air supply unit disposed on the side wall of FIG. 3. [Figure 8] 1 is an explanatory diagram illustrating the mechanism of an indoor cooling system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] An indoor cooling system according to an embodiment of the present invention will be described with reference to the drawings. In Figure 1, the reference numeral 1 denotes a building. The building 1 is a single-story building, and the area below the roof 3 is divided by a ceiling 5 into an attic 7 and an under-ceiling space 9. The under-ceiling space 9 is divided into multiple compartments by walls 11.

[0011] As shown in detail in Figure 2, roof 3 has a space secured by furring strips between the roof finishing material (Galvalume Steel Sheet (registered trademark)) 3a, waterproof sheet (asphalt roofing) 3b, and sheathing material 3c, and the sheathing material 3e and heat-shielding sheet 3f supported by rafters 3d. This space serves as a ventilation layer 3g. Furthermore, sheathing material 3e is secured just before the tip of rafter 3d, ensuring a ventilation path as shown by the arrow. Furthermore, heat-shielding sheet 3f is made of aluminum foil processed into a sheet. This insulated roof structure allows the heat-shielding sheet 3f to block heat by reflecting radiant heat from the sun, while the ventilation layer 3g minimizes heat conduction.

[0012] The attic 7 is equipped with an air conditioner 13. This air conditioner 13 is a type of air conditioning equipment that adjusts the temperature and humidity of indoor air, and is commonly called an "air conditioner." The air conditioner 13 is a heat pump type and corresponds to an indoor unit composed of a heat exchanger. The air conditioner 13 is connected to an outdoor unit composed of a heat exchanger, a pressure reducer, and a compressor by a pipe that airtightly penetrates the wall, and these form a refrigerant circulation path.

[0013] As shown in Figure 4, air conditioner 13 houses a fan and a heat exchanger in case 13a, with air inlet 13b on the rear side and air outlet 13c on the front side. Air conditioner 13 is supported and raised in a sideways position with air inlet 13b facing upward and air outlet 13c facing downward, leaving a space between air inlet 13b and roof 3 above, and between air outlet 13c and ceiling 5 below. Because air outlet 13c faces the ceiling 5, cool air flows along the top surface of ceiling 5.

[0014] Three ducts 15, 15, 15 are installed in the attic 7, with one end of each raised and bent in a U-shape, hanging down toward the intake port 13b of the air conditioner 13. The opening of each end is adjacent to the intake port 13b from above. Therefore, as shown by the arrows, the air conditioner 13 draws in air circulating through the ducts 15, 15, 15 and blows cool air toward the ceiling 5 inside the attic 7. The air conditioner 13 is installed in the middle of the attic 7.

[0015] As shown in Figure 3, the under-ceiling space 9 is divided into multiple compartments by walls 11. Of these, the ceilings 5 of the master bedroom, the room drying space, and the entrance hall each have through holes, and exhaust units 17, 17, 17 are attached to the respective through holes. The exhaust unit 17 is a ceiling-embedded ventilation device dedicated to exhaust, and as shown in Figure 5, an exhaust fan is housed in a case 17a. The case 17a is fitted into a through-hole with the intake port 17b facing the under-ceiling space 9. This intake port 17b is fitted with a lattice-shaped louver. The other end opening of the above-mentioned duct 15 is connected to a duct connection portion 17c on the exhaust port side that extends into the attic 7. Therefore, as shown by the arrow, air in the under-ceiling space 9 is sucked in through the intake port 17b and brought into the attic 7. However, because the duct connection portion 17c is connected to the duct 15, it is not released into the attic 7.

[0016] The air in the master bedroom, the room drying space and the entrance hall in the under-ceiling space 9 passes through the inside of ducts 15, 15, 15 piped in the attic 7 and is guided toward the intake port 13b of the air conditioner 13. The exhaust sections 17, 17, 17 are all provided at locations away from the air conditioner 13.

[0017] In addition, in the under-ceiling space 9, in addition to the master bedroom, room drying space, and entrance hall, there are also through-holes in the ceilings 5 of the free space, living / dining / kitchen (LDK), toilet, dressing room, and family cloakroom, and air intake sections 19, 19, ... are installed in each of the through-holes. As shown in Figure 6, the air intake unit 19 is a ceiling-embedded ventilation device dedicated to air intake, and an exhaust fan is housed in case 19a. Case 19a is fitted into a through-hole with air intake port 19b facing the under-ceiling space 9. This air intake port 19b is fitted with a flat-panel louver. Duct connection part 19c on the intake side, which extends into the attic 7, is open within the attic 7. Two air intake units 19, 19 are installed in the free space.

[0018] In addition, a small through hole is provided on the tatami corner side of the wall 11 separating the tatami corner from the free space, and an air supply part 21 is attached to the through hole. As shown in Figure 7, this air intake section 21 is configured as a scaled-down version of air intake section 19, with air intake port 21b of case 21a facing the tatami corner. Duct connection section 21c on the intake side passes through wall section 11 and enters attic 7.

[0019] Therefore, the air in the attic 7 is blown out into the under-ceiling space 9 into the master bedroom, the room drying space, the entrance hall, the free space, the living-dining-kitchen (LDK), the toilet, the dressing room and the family cloakroom. In this sense, the entire attic 7 can be said to form one duct. Moreover, since the air intake port 19b of the air intake section 19 faces the lateral wall section 11 and the exhaust port 17b of the exhaust section 17 faces downward, convection is forced to occur in the under-ceiling space 9, circulating the air.

[0020] The air conditioner 13, exhaust fan, and intake fan are wired together and can be operated as a system by operating a single controller. The air conditioner 13 is capable of both cooling and heating, but in this cooling system it is used for cooling.

[0021] The attic 7 is a space surrounded by the roof 3, ceiling 5 and exterior wall, and the through holes in the ceiling 5 are blocked by the exhaust section 17 and the air intake section 19. Furthermore, any invisible gaps that form at the boundary between the exterior wall and the roof 3 are blocked with appropriate parts, making it an airtight structure.

[0022] As described above, the indoor cooling system is installed in building 1, and operates air conditioner 13 in cooling mode while also operating the intake fan and exhaust fan. However, since these are not linked, the intake fan and exhaust fan are operated individually according to the situation to adjust the indoor atmosphere to a comfortable one. As shown in Figure 8, the airtight attic 7 is filled with cold air blown out from the air conditioner 13, creating a cool atmosphere. Since it is separated from the under-ceiling space 9 by the ceiling 5, the attic 7 has a stable atmosphere.

[0023] The roof 3 is provided with a heat-shielding sheet 3f, which reflects and blocks radiant heat from the sun, so that people inside the building 1 are placed in an environment where radiant heat from the sun is blocked. Furthermore, since the heat-shielding sheet 3f faces the sun via the ventilation layer 3g, the heat-shielding sheet 3f itself is prevented from heating up. However, the heat generated on the roof 3 side is normally transferred to the ceiling 5 through the exterior walls and pillars by thermal conduction, causing the ceiling 5 to heat up. However, as mentioned above, the attic 7 has a cool atmosphere, so this thermal conduction is cut off and the ceiling 5 does not heat up, but rather is cooled. Therefore, instead of a warm radiation phenomenon from the ceiling 5 to the person in the under-ceiling space 9, a cold radiation phenomenon occurs in which heat is radiated from the person in the under-ceiling space 9 to the ceiling 5.

[0024] Furthermore, by the exhaust section 17 and the air intake sections 19, 21, a portion of the cool air in the attic 7 is blown out and supplied into the under-ceiling space 9, and the warm air in the under-ceiling space 9 is returned and exhausted into the attic 7. The blown out cool air becomes a gentle breeze, and forced convection occurs in the under-ceiling space 9. The under-ceiling space 9 is divided into multiple rooms by walls 11, and multiple exhaust sections 17, intake sections 19, and intake section 21 are each placed in appropriate locations taking into consideration the positions of the walls 11 and doors, etc., so that convection occurs evenly throughout the under-ceiling space 9. Therefore, people in the space under the ceiling 9 also lose heat due to this convection.

[0025] The exhaust sections 17, 17, 17 are installed at locations farther away than the air conditioner 13 and further away than the air outlet 13b, so that the warm air in the space 9 under the ceiling is efficiently collected. In addition, the warm air is collected by the duct 15, so the cool atmosphere in the attic 7 is not destroyed.

[0026] In this way, if the air conditioning system of the present invention is installed in building 1, radiant heat from the sun is blocked and the cold air generated by the air conditioning operation of a single air conditioner 13 is effectively utilized, so that the cold air blown out from air conditioner 13 circulates in under-ceiling space 9 and also promotes the generation of cold radiation radiated from people in under-ceiling space 9 toward ceiling 5. Actual experiments have confirmed that although air conditioner 13 is designed for a room of 10 tatami mats, in an under-ceiling space 9 of just under 60 tatami mats, the room temperature can be lowered to around 23°C even when the outside temperature is around 34°C. Therefore, you can live a comfortable life without having to endure the summer heat due to cost considerations.

[0027] Although the embodiments of the present invention have been described in detail above, the specific configuration is not limited to these embodiments, and the invention also includes design changes within the scope of the present invention without departing from the gist of the present invention. For example, the number and locations of exhaust sections 17, intake sections 19, and even intake sections 21 are not fixed, but will be optimized appropriately depending on the size of building 1 and the room configuration of under-ceiling space 9. [Explanation of symbols]

[0028] 1...Building 3...Roof 3a...Roof finishing material (Galvalume steel sheet (registered trademark)) 3b...Waterproof sheet (asphalt roofing) 3c…field wood 3d…rafters 3e... Roofing material 3f... Heat-shielding sheet 3g...Ventilation layer 5...Ceiling 7...Attic 9...Under-ceiling space 11...Wall section 13...Air conditioner 13a...Case 13b...Intake port 13c...Outlet 15...Duct 17...Exhaust section 17a...Case 17b... Intake port 17c... Duct connection part 19...Air intake section 19a...Case 19b...Air intake 19c...Duct connection 21...Air intake section 21a...Case 21b...Air intake 21c...Duct connection

Claims

1. an air conditioner installed in the attic of a building; a plurality of air intake units provided on the ceiling, each having an air intake fan for supplying air in the attic to a space under the ceiling, and a plurality of exhaust units each having an exhaust fan for exhausting air in the space under the ceiling to the attic; and a duct arranged in such a manner that one end opening is connected to or adjacent to an exhaust port of the exhaust unit and the other end opening is connected to or adjacent to an intake port of the air conditioner; An indoor cooling system characterized in that the ceiling is cooled by the cold air blown out from the air conditioner, and convection is forced to occur in the space under the ceiling via the air intake section and the air exhaust section.

2. 2. The indoor cooling system according to claim 1, An indoor cooling system characterized by the air conditioner's outlet facing the ceiling.

3. 3. The indoor cooling system according to claim 2, The attic has an airtight structure, and the indoor cooling system is characterized by the presence of a duct that blows cool air from the air conditioner into the space under the ceiling.

4. 4. The indoor cooling system according to claim 3, An indoor cooling system characterized by an insulated roof.

5. 5. The indoor cooling system according to claim 4, This indoor cooling system is characterized in that the roof is equipped with a heat-shielding sheet and is constructed in a way that ensures roof ventilation.

6. 6. The indoor cooling system according to claim 1, An indoor cooling system characterized in that a plurality of exhaust sections are provided at locations farther away from the air intake section closest to the air conditioner.

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