Indoor heating system

Abstract

To provide an indoor heating system capable of efficiently heating the interior of a building by well utilizing an air conditioner for heat transfer from a flower surface or the generation of heat radiation, even if reducing the installation number or lowering a set temperature.SOLUTION: The indoor heating system includes ventilation equipment 31 for forcibly generating a convection current in an underfloor space 21 of a building 1, a plurality of air supply parts 41 and air exhaust parts 39 provided on the floor surface 13, and an air conditioner 29 for sucking air from an above-floor space 9 and blowing hot air into the underfloor space 21, the air exhaust parts 39 being duct-connected to the ventilation equipment 31. In the underfloor space 21, warm air is delivered to the corner. In the underfloor space 21, the floor surface 13 side is covered with an air layer having a relatively high temperature even in a warm air atmosphere. Thus, such a state that floor heating is provided is actualized. In a large area ranging from the air supply part 41 to the above-floor space 9, air is naturally supplied and warmed by the convection current of the warm air.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] To heat 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] In winter, the temperature difference is large, making it easy to experience heat shock when you go from the heated living room to the hallway, then to the changing room and get into the bathtub or go to the toilet. However, as the number of rooms increases and the size of the rooms increases, the installation costs and electricity bills will increase. Furthermore, if air conditioners are installed in the hallways and bathrooms, the cost burden will become too great.

[0005] The present invention was made in response to the above-mentioned conventional problems, and aims to provide a new and useful indoor heating system that can efficiently heat the interior of a building even if the number of air conditioners installed is reduced or the set temperature is lowered by making good use of air conditioners not only for warm air convection, which has been conventionally assumed, but also for heat conduction and heat radiation from the floor surface. [Means for solving the problem]

[0006] The present invention has been made to solve the above-mentioned problems, and is an indoor heating system comprising a blower that generates forced convection in the underfloor space of a building, a plurality of air intake sections and exhaust sections that are provided on the floor surface of the building and connect the above-floor space of the building with the underfloor space, and an air conditioner that draws air from the above-floor space and blows warm air into the underfloor space, the exhaust section being connected to the blower by a duct, and the floor surface being heated by the warm air blown out from the air conditioner, and warm air convection being forced to occur in the above-floor space via the air intake section and the exhaust section.

[0007] Preferably, the air conditioner outlets face downwards into the floor. Preferably, a foundation packing is interposed between the foundation and the base inside the building, so that the space directly below the floor is ventilated. Preferably, the underfloor space has an airtight structure and forms a duct for blowing warm air from an air conditioner into the space above the floor. Preferably, the underfloor space is insulated from the exterior wall of the building. Preferably, some of the plurality of air supply sections are provided with air supply fans so that air can be forcibly supplied. Preferably, the air blower is a ventilation device having a heat exchange function, and the air intake port of the air intake section located near the ventilation device can be closed with a cover. Preferably, the underfloor space is maintained at a positive pressure during heating operation. [Effects of the Invention]

[0008] According to the indoor heating system of the present invention, air conditioners are effectively utilized not only for warm air convection, which has been conventionally assumed, but also for heat conduction and heat radiation from the floor surface, thereby making it possible to efficiently heat the interior of a building even if the number of air conditioners installed is reduced or the set temperature is lowered. [Brief explanation of the drawings]

[0009] [Figure 1]1 is a vertical cross-sectional view of a building equipped with an indoor heating system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the building of FIG. 1. [Figure 3] FIG. 3 is a perspective view of an air conditioner installed in the room of FIGS. 1 and 2. [Figure 4] FIG. 4 is a perspective view of the air conditioner shown in FIG. 3 with a cover attached thereto. [Figure 5] FIG. 3 is a perspective view of the ventilation equipment installed under the floor of FIGS. 1 and 2. [Figure 6] FIG. 3 is a perspective view of the air supply unit of FIG. 2. [Figure 7] FIG. 3 is a perspective view of the exhaust unit of FIG. 2. [Figure 8] 1 is an explanatory diagram illustrating the mechanism of an indoor heating system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] An indoor heating 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 below the roof 3, a ceiling 5 divides the building into an attic 7 and an above-floor space 9. The above-floor space 9 is divided into multiple compartments by walls 11. A breathable foundation packing 19 is interposed between the base 15 supporting the floor surface 13 and the foundation 17, and the underfloor space 21 directly below the floor surface 13 is completely ventilated. Additionally, a heat insulating material 23 is attached to the inner surface of the foundation 17 in contact with the outer periphery, so that the underfloor space 21 has a heat insulating structure against the outer periphery. Furthermore, the underfloor space 21 is closed off from the outside, and has an airtight structure in which only the supply and exhaust section (described later) serves as an air passage for the floor surface 13.

[0011] As shown in Figures 1 and 2, the above-floor space 9 is divided into multiple compartments by walls 11, and an air conditioner 29 is installed in the lower storage compartment 27 of the two-tier storage compartment in the corner of the living, dining, and kitchen (LDK) area. This air conditioner 29 is a type of air conditioning equipment that adjusts the temperature and humidity of indoor air, and is commonly known as an "air conditioner." The air conditioner 29 is a heat pump type and corresponds to an indoor unit composed of a heat exchanger. The air conditioner 29 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.

[0012] As shown in Fig. 3, air conditioner 29 houses a fan and a heat exchanger in case 29a, with air inlet 29b on the rear side and air outlet 29c on the front side. Air conditioner 29 is supported and raised in a sideways position with air inlet 29b facing upward and air outlet 29c facing downward, and opening 13a is formed in floor surface 13 below air outlet 29c. The front side of storage section 27 is also open. As shown in Figure 4, cover 25 is removably installed to surround air conditioner 29. This cover 25 has a U-shaped cross section in the vertical direction, and is installed in an upright position along the edge of opening 13a in floor surface 13, with cover 25 being inserted from the front and surrounding the front and both left and right sides of case 29a of air conditioner 29, so that air outlet 29c is isolated from above-floor space 9. In addition, the opening of storage section 27 is closed by horizontal crossbeam frame 26, making air conditioner 29 difficult to see from inside the room and reducing the sense of incongruity.

[0013] Additionally, ventilation equipment 31 with a heat exchange function is installed in the underfloor space 21. This ventilation device 31 exchanges heat by having the intake air duct and exhaust air duct cross each other via a heat exchange element, and returns "heat" and "humidity" from the exhaust air to the intake air for total heat exchange. An intake air fan and an exhaust fan are installed in each air duct. Air supply duct 33a is connected to an indoor air supply port with a filter to the outdoors, and air supply duct 33b is opened in a short length within underfloor space 21. For example, a product called "Sumika" manufactured by Marvelx Co., Ltd. can be used as the ventilation device 31. This device allows for 90% heat transfer. The opening 13b in the floor 13 is closed by a lid 13c, and when the lid 13c is opened, the ventilation device 31 is exposed, and the interior can be cleaned by opening the lid above it.

[0014] Furthermore, exhaust duct 35a is connected to an outdoor exhaust port outdoors, and within underfloor space 21, exhaust duct 35b is connected to turtle chamber 37. One ends of a plurality of exhaust ducts 35c, 35c, ... are connected to turtle chamber 37. Through holes are provided in the toilet, dressing room, family cloakroom, master bedroom, shoe cloakroom, free space, and pantry on floor surface 13, and an exhaust unit 39 is attached to each of the through holes, as shown in Figure 6. The intake port 39a of this exhaust unit 39 faces the ceiling 5. A louver is attached to the intake port 39a. The exhaust port faces the underfloor space 21. The other ends of exhaust ducts 35c, 35c, ... are connected to each exhaust port. Therefore, the exhaust air duct does not intersect with the air in the underfloor space 21. In Fig. 2, the exhaust section 39 is indicated by circled numbers 1 to 9.

[0015] Furthermore, through holes are provided in the living / dining / kitchen (LDK), free space, laundry drying space, dressing room, master bedroom, and entrance hall on floor surface 13, and air intake units 41, 41, ... are attached to each through hole, as shown in Figure 7. Air intake port 41a of air intake unit 41 faces ceiling 5. Louvers are attached to air intake port 41a. The intake port opens into underfloor space 21. Air intake unit 41X is equipped with an intake fan and is configured to forcibly supply air, while air intake unit 41Y is not equipped with an intake fan. Figure 7 shows air intake unit 41X. Air intake unit 41X is located away from ventilation device 31 and in a location where the warm air blown into underfloor space 21 is unlikely to spread. Operation of the fan forcibly blows the warm air upward, as indicated by the arrow.

[0016] The air conditioner 29 is capable of both heating and cooling operation, but in this indoor heating system it is used for heating operation.

[0017] As described above, the indoor heating system is installed in building 1, and operates air conditioner 13 for heating and ventilation equipment 3 for ventilation. It also operates the supply air fan and exhaust fan. However, since these are not linked, the supply air fan and exhaust fan are operated individually according to the situation to adjust the indoor atmosphere to a comfortable one. The ventilation equipment 31 supplies clean air from outside to the underfloor space 21, while exhausting dirty air from the above-floor space 9 to the outdoors. This ventilation returns "heat" and "humidity" from the exhaust air to the intake air, so heat is not wasted. The ventilation equipment 31 also provides the power to generate forced convection.

[0018] Warm air is blown out from the air conditioner 29 into the underfloor space 21. This warm air mixes with the clean air in the underfloor space 21 to become warm air, and this mixing is promoted not only by the blowing force from the air conditioner 29 but also by the cooperation of the force that generates forced convection from the ventilation device 31. During heating, the supply port 41a of the air intake section 41Y near the ventilation device 31 is closed with a cover (not shown), preventing short-circuiting of the warm air from the air conditioner 29.

[0019] Therefore, in the underfloor space 21, the warm air is distributed not only to the vicinity of the air conditioner 29 but also to the corners of the underfloor space 21. And, since the underfloor space 21 has an airtight structure, this warm air remains within the underfloor space 21. Also, since the outer wall has a heat insulating structure, heat is not lost to the outdoors. As a result, the underfloor space 21 becomes a space with a stable warm atmosphere.

[0020] In the underfloor space 21, due to specific gravity, a layer of air at a relatively high temperature is covered on the floor surface 13 side even in a warm air atmosphere. Because the foundation packing 19 allows ventilation over the entire surface directly below the floor surface 13, the entire floor surface 13 side is covered with warm air without interruption. The floor surface 13 is not designed to have a heat insulating structure, so it can be heated efficiently, creating a state just like having floor heating. The underfloor space 21 can be made positive pressure by adjusting the operational balance between the intake fan and exhaust fan of the ventilation equipment 31, so by maintaining the positive pressure, a warm air layer can be constantly pressed against the floor surface 13. Therefore, as shown in FIG. 8, when a person stands or sits on the floor surface 13, the person is warmed by thermal conduction and thermal radiation.

[0021] Furthermore, by maintaining a positive pressure in the underfloor space 21, most of the warm air in the vicinity of the floor surface 13 in the underfloor space 21 is naturally supplied from the air supply section 41 toward the above-floor space 9. The air supply section 41X, which is located away from the ventilation device 31, is equipped with an air supply fan, so the air is forcibly sucked in by the operation of the fan and supplied toward the above-floor space 9. Therefore, air is supplied into the above-floor space 9 from any of the air supply sections 41 unless they are covered. In this way, the underfloor space 21 also forms a duct for blowing out warm air from the air conditioner 29 into the above-floor space 9.

[0022] In the above-floor space 9, warm air spreads and rises from the floor surface 13, and part of it reaches the vicinity of the ceiling 5. The exhaust section 39 has an intake port 39a facing the ceiling 5, and this exhaust port 39 is connected to the ventilation equipment 31, so that the air in the above-floor space 9 is sucked downward. By means of the exhaust section 39 and the air supply section 41, a portion of the warm air near the floor surface 13 in the underfloor space 21 is blown out and supplied into the above-floor space 9. The blown out warm air becomes a gentle breeze, rises, and then descends toward the exhaust section 39, which causes forced convection in the above-floor space 9, and the dirty air in the above-floor space 9 is exhausted through the exhaust ducts 35c, 35b, and 35a. Since the above-floor space 9 is partitioned, the above-mentioned convection currents occur individually within the partitioned spaces.

[0023] Therefore, as shown in FIG. 8, if a person is present in the above-floor space 9, the person is also warmed by the warm air convection from the air conditioner 29. The above-floor space 9 is divided into multiple rooms by walls 11, but multiple exhaust sections 41 and intake sections 39 are arranged in appropriate locations, so that convection occurs evenly throughout the above-floor space 9.

[0024] In this way, if the heating system of the present invention is installed in building 1, the warm air generated by the heating operation of one air conditioner 29 is effectively utilized, and the warm air blown out from air conditioner 29 circulates in above-floor space 9, and heat radiation is generated toward people in above-floor space 9. Furthermore, heat conduction also occurs when people come into contact with floor surface 13. Actual experiments have confirmed that although air conditioner 29 is designed for a room of 10 tatami mats, in an above-floor space 9 of just under 60 tatami mats, the room temperature can rise to around 23°C even when the outside temperature is around 10°C. Therefore, you can live a comfortable life without having to endure the cold winter weather due to cost considerations.

[0025] 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 the exhaust units 39 and intake units 41 are not fixed, but are optimized as appropriate depending on the size of the building 1 and the room configuration of the above-floor space 9. In addition, a warm atmosphere can be created in the underfloor space 21 not by the ventilation device 31 but by a specialized air blower such as a circular air blower, so such an air blower may be used instead of the ventilation device 31. [Explanation of symbols]

[0026] 1...Building 3...Roof 5...Ceiling 7...Attic 9...Floor space 11...Wall part 13...Floor 13a...Opening 13b…Opening 13c…Lid 15...Base 17...Foundation 19...Foundation packing 21...Underfloor space 23...Insulation material 25...Cover 26...Side frame 27...Storage section 29...Air conditioner 29a...Case 29b...Inlet 29c...Air outlet 31...Ventilation equipment 33a...Air supply duct 33b...Air supply duct 35a...Exhaust duct 35b...Exhaust duct 35c...Exhaust duct 37...Turtle chamber 39...Exhaust section 39a...Suction port 41...Air supply part 41a...Air supply port

Claims

1. a blower that generates forced convection in an underfloor space of a building; a plurality of air intake and exhaust sections that are provided on the floor surface of the building and that connect the above-floor space of the building with the underfloor space; and an air conditioner that draws air from the above-floor space and blows warm air into the underfloor space; the exhaust unit is duct-connected to the air blower, An indoor heating system characterized in that the floor surface is heated by warm air blown out from the air conditioner, and warm air convection is forcibly generated in the space above the floor through the air intake section and the exhaust section.

2. 2. The indoor heating system according to claim 1, An indoor heating system characterized by an air conditioner outlet facing downwards into the floor.

3. 3. The indoor heating system according to claim 2, This indoor heating system is characterized by the fact that foundation packing is installed between the foundation and the base inside the building, so that the space directly below the floor is ventilated.

4. 4. The indoor heating system according to claim 3, This indoor heating system is characterized by the fact that the underfloor space has an airtight structure and forms a duct for blowing warm air from the air conditioner into the space above the floor.

5. 5. The indoor heating system according to claim 4, An indoor heating system characterized by an insulated underfloor space against the exterior walls of the building.

6. 6. The indoor heating system according to claim 5, An indoor heating system characterized in that some of the multiple air supply sections are provided with air supply fans, allowing for forced air supply.

7. 7. The indoor heating system according to claim 6, An indoor heating system characterized in that the blower is composed of a ventilation device with a heat exchange function, and the air intake port of the air intake section located near the ventilation device can be closed with a cover.

8. 8. The indoor heating system according to claim 1, An indoor heating system characterized by heating operation while maintaining positive pressure in the underfloor space.

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