JP2019007332A - Underfloor space structure for natural convection type air conditioning, and building equipped with the same - Google Patents

Abstract

To provide an underfloor space structure for achieving a natural convection type air conditioning, which can naturally and gradually generate and maintain air convection current having warmth not depending on power within a building, by performing heat exchange with recurrent warmth and cool ambient air reliably mixed to each other using the effect of attracting them mutually while securing the recurrent warmth and the cool ambient air each having temperature difference within the building.SOLUTION: An underfloor space structure 1 performs air conditioning of residence zone spaces 8 by generating natural air convection current motion within a building 9 with residence zone spaces 8 of the first floor or multiple floors. The underfloor space structure 1 comprises air mixed spaces 2, an air heating space 3, and space communicating means 4, with a foundation heat insulated underfloor of a first floor surface FS1, or the foundation heat insulated underfloor of the first floor surface FS1 and a zone under the stair way 81 coupling the first floor residence zone space 8 and the second floor residence zone spaces 8 partitioned therebetween.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an underfloor space structure for natural convection air conditioning and a building including the same, and in particular, in a building having a residential area space on the first floor or a plurality of floors, outside air taken indoors from outside, A base-insulated first floor that air-conditions the living space by generating a natural air convection motion in the indoor space by using a temperature difference from the recurring warm air that is warmed to return to the indoor space when the outside air is warmed For natural convection air conditioning partitioned in the area under the floor, or the area under the ground floor of the first floor with basic insulation, and the area under the stairs connecting the residential space of the first floor and the residential space of the second floor More specifically, an underfloor space structure and a building including the same are described. More specifically, the outside air and the recurrent warm air are taken in, mixed and heat-exchanged to generate mixed air, and the mixed air is heated. Warm And an air heating space that causes the mixed air to flow through the air mixing space and the air heating space, and the air mixing space is surrounded by walls on all sides. In addition, a return warm air intake means for taking the return warm air into the air mixture space is formed in the ceiling of the air mixing space, and an outside air intake means provided with heat insulation in the air mixing space. The rear air outlet is disposed, and the outside air intake means extends from an outside air inlet formed in the outer wall of the building and constitutes a wall portion that surrounds the four sides of the air mixing space. The air heating space is formed through at least one of the front wall portion, the left wall portion, and the right wall portion different from the wall portion on which the space communication means is formed. A heat source is arranged inside The space communication means is different from a wall portion of the rear wall portion, the front wall portion, the left wall portion, and the right wall portion, through which the outside air intake means is provided. The outside air outlet is formed in at least one of the walls, and is disposed at a position lower than the floor surface of the first floor, and the space communication means, the return warm air intake means, and the outside air exhaust The present invention relates to an underfloor space structure characterized in that outlets are located in the vicinity of each other, and a building provided with the same, which uses the natural air convection motion to air-condition the living space.

  In recent years, heat-insulated and air-tight buildings have been constructed that heat and ventilate the entire room by generating natural air convection motion by providing a heat source in the underfloor space of the building while taking outside air into the building. .

  As such a building, for example, a charcoal grain laid on the underfloor concrete concrete that is fundamentally insulated in a highly airtight and highly insulated building, a radiator installed in the underfloor space, and an exhaust vent provided on the floor surface The air warmed by the radiator located under the floor is sent into the room from the exhaust vent using the temperature difference, and the room air is sent from the air intake vent to the underfloor space. At least a part of the underfloor space in addition to a building (Patent Document 1) equipped with an underfloor heating system with a humidity control function, which is fed and circulated and is humidified through charcoal grains containing water vapor laid under the floor The underfloor heating building (Patent Document 2) provided with the first outside air comforting means and the second outside air comforting means, a highly airtight building body, and the building body under the floor, forcing the outside air into the building body A ventilation device to be introduced; In a high airtight type building comprising an exhaust port for exhausting indoor air to the outdoors and an air vent provided in the building main body and venting outside air supplied by a ventilator to the room A building (Patent Document 3) in which an air reforming tray for storing an air reforming substance in a vent is detachably provided in contact with flowing outside air, and is supplied to the underfloor space disposed in the underfloor space Air that recirculates outside air and living space and circulates air that has returned to the underfloor space and air supply means for supplying outside air to the underfloor space are arranged, and air that returns to the underfloor from the return opening Natural convection type underfloor heating / ventilation system having a return air amount control means for adjusting the amount of warm air blown out from the blowout opening by increasing / decreasing the amount of air, and a building equipped with the same (Patent Document 4), underfloor space A building body with an outside air inlet and an exhaust port located higher than the outside air inlet, a constant pressure chamber that is provided in the building body and that takes in outside air from the outside air inlet by an intake fan, and is provided in the underfloor space and has a constant pressure Outside air is supplied from the room, a constant temperature greenhouse that communicates with the return opening provided on the first floor, a rising airway that communicates from the underfloor space to the second floor space, and the second floor space communicates with the first floor space. A ventilation temperature control building (Patent Document 5) composed of a downdraft, a vent provided in the partition walls of the first floor space and the second floor space, and a heat source disposed in the underfloor space can be mentioned.

JP-A-2005-241228 JP 2009-062801 A Utility Model Registration No. 3121941 JP 2009-150643 A JP 2017-056773 A

  However, in the building provided with an underfloor heating system with a humidity control function disclosed in Patent Document 1, since the air inlet is formed above the living space, cool outdoor air in winter enters the living space. In particular, it is difficult to put it to practical use in cold regions. Moreover, in the underfloor heating building currently disclosed by patent document 2, the airtightness and heat insulation for every living area must be improved considerably, As a result, the structure of a building will be restricted to a fixed structure, and a resident is There is a possibility that the structure is difficult to use. Furthermore, in the building disclosed in Patent Document 3, air convection hardly occurs in the structure and indoors. As a result, the intake of the outside air must be relied on the intake by the machine (power).

  On the other hand, in the natural convection type underfloor heating and ventilation system disclosed in Patent Document 4 and a building equipped with the same, by using heat storage heating with a large amount of heat, a warm air is intermittently generated to form an updraft, As a result, air convection is forcibly generated in the room, and the warm air and the cool outside air that circulate in the room and return to each other are brought together and mixed and heat exchange is performed to exchange air convection. In other words, it is different from generating natural convection by utilizing the temperature difference between warm indoor air and cool outdoor air. In addition, since warm air is generated intermittently by using a regenerative heating system with a large amount of heat to form an updraft and forced convection is generated in the room, the warm air that circulates in the room and returns It is not necessary to provide a space (air mixing space) for bringing outside air to each other for mixing and heat exchange, and the indoor air temperature rises too much as it is, so a return air amount control means is installed. Thus, since it is necessary to regularly shut out the indoor convection to lower the room temperature, it is difficult to realize a gentle and warm air convection.

  On the other hand, in the ventilation temperature control building disclosed in Patent Document 5, the warm air and the cool outside air that circulate in the room and return to each other are brought together, and in the space for mixing and heat exchange (air mixing space), Although it seems to be applicable at first glance, it is equipped with a constant temperature greenhouse, but by sending cool outside air taken into the room into the constant temperature room by mechanical control called an outside air suction fan, it causes forced air convection in the room. After all, warm air and cool outside air that circulates in the room and returns to each other are brought together to generate convection of air by mixing and heat exchange, in other words, warm air in the room This is different from generating natural convection by using the temperature difference between the air and cool outside air.

  In addition, in the natural convection type underfloor heating / ventilation system disclosed in Patent Document 4 and a building including the natural convection type underfloor heating / ventilation system, it can be seen at a glance that the constant temperature greenhouse in the ventilation temperature control building disclosed in Patent Document 5 is provided. However, as described above, the natural convection type underfloor heating / ventilation system disclosed in Patent Document 4 and the building including the natural convection type use heat storage heating with a large amount of heat. Therefore, it is necessary to install a return air amount control means to shut out indoor convection regularly to lower the room temperature, and in addition, by mechanical control of an outside air suction fan. A constant temperature chamber described in Patent Document 5 forcing air convection in the room is installed, and warm air and cool outside air that circulate in the room and return to each other are drawn. In addition, since there is no need to generate air convection by mixing and heat exchange, the natural convection type underfloor heating and ventilation system disclosed in Patent Document 4 and a building equipped with the same are disclosed in Patent Document 5 It can be said that the purpose is different from that of the disclosed ventilation temperature control building, and there is an impediment to this idea.

  Therefore, the present invention has been made to solve the above-described problems, and in the indoor, while ensuring the return warm air and the cool outside air having a temperature difference, the return warm air and the cool outside air are mutually. Naturally, it is possible to generate and sustain convection of air naturally and calmly without relying on power, because it can be mixed and heat exchanged by using the attractive action. Providing an underfloor space structure to realize convection type air conditioning, and furthermore, air conditioning, humidification, and room temperature adjustment in the living area space are easy, and there is no unevenness in every corner of the living area space with constant ventilation The purpose is to provide a building that can be warmed.

  As a result of diligent research, the present inventor has connected the area under the floor of the first floor with basic insulation, or the area under the floor of the first floor with basic insulation, and the living area space on the first floor and the living area space on the second floor. The space under the floor for natural convection type air conditioning, which is divided in the area under the stairs, mixes the outside air and the return warm air to mix and exchange heat, and warms the mixed air to generate warm air. And an air heating space to communicate with the air mixing space and the air heating space to circulate the mixed air. The four sides of the air mixing space are surrounded by walls, and the ceiling of the air mixing space is The return warm air intake means to take the return warm air into the air mixing space is formed. Inside the air mixing space, the outside air intake means of the outside air intake means with heat insulation is arranged, and the outside air intake means is the outer wall of the building Formed outside A wall in which space communication means is formed among the rear wall portion, the front wall portion, the left wall portion, and the right wall portion that extends from the suction port and forms a wall portion surrounding the four sides of the air mixing space. The heat source is disposed in at least one of the wall portions different from the portion, the heat source is disposed inside the air heating space, and the space communication means includes the rear wall portion, the front wall portion, the left wall portion, and the right wall portion. Of these, the outside air intake means is formed in at least one of the wall portions different from the wall portion through which the outside air intake means is provided, and the outside air discharge port is disposed at a position lower than the first floor surface, and the space communication means In addition, the return warm air intake means and the outside air discharge port are positioned (disposed) in the vicinity of each other, so that the return warm air and the outside air having a temperature difference are secured to each other while the return warm air and the cool outside air are mutually secured. Heat exchange by mixing firmly using the attractive action As a result, it has been found that natural convection air conditioning that can generate and sustain convection of air naturally and calmly without relying on power can be realized indoors. The following inventions have been completed.

(1) In a building having a residential area space on the first floor or a plurality of floors, using the temperature difference between the outside air taken from the outside to the inside and the return warm air that is warmed and returns to the inside when the outside air is warmed, The first floor floor area under basic insulation, or the first floor floor area under basic heat insulation, and the first floor residence, in which the indoor space is air-conditioned by generating natural air convection motion An underfloor space structure for natural convection type air conditioning, which is partitioned in the area under the stairs that connects the area space and the living area space on the second floor, taking in the outside air and the return warm air, mixing them, and exchanging heat The mixed air is circulated through the air mixing space for generating mixed air, the air heating space for heating the mixed air to generate warm air, and the air mixing space and the air heating space. Spatial Communicator The air mixing space is surrounded by walls on four sides, and a return warm air intake means for taking the return warm air into the air mixing space is formed on the ceiling of the air mixing space, Inside the air mixing space, the outside air intake means of the outside air intake means subjected to heat insulation construction is arranged, the outside air intake means extends from the outside air inlet formed in the outer wall of the building, Of the rear wall portion, the front wall portion, the left wall portion and the right wall portion constituting the wall portion surrounding the four sides of the air mixing space, at least different from the wall portion in which the space communication means is formed. A heat source is disposed inside the air heating space, and the space communication means includes the rear wall portion, the front wall portion, and the left wall. Of the outer wall and the right wall The outside air discharge port is formed at a position lower than the first floor surface, and is formed on at least one of the wall portions different from the wall portion through which the insertion means is provided. The underfloor space structure characterized in that the means, the return warm air intake means, and the outside air discharge port are located in the vicinity of each other.

(2) The floor for the natural convection type air conditioning according to (1), wherein the ceiling of the air mixing space is a predetermined portion of the floor surface of the first floor, the partition plate or the stairs. Spatial structure.

(3) When the building volume is 150 m ³ or more and 1000 m ³ or less, the vertical cross-sectional area S ₁ of the vertical cross section obtained by cutting the air mixing space in the vertical direction on a plane orthogonal to the rear wall portion and the front wall portion and the outside air (1) or (2) characterized in that the ratio of the area ratio S ₁ / S _{2 to} the actual opening area S ₂ of the opening of the discharge port is 2.4 ≦ S ₁ / S ₂ ≦ 70 Underfloor space structure for natural convection air conditioning as described.

(4) In the case where the building volume is 150 m ³ or more and 1000 m ³ or less, the cross-sectional area S ₃ of the cross section obtained by cutting the air mixing space in a horizontal direction on a plane orthogonal to the rear wall portion and the front wall portion and the outside air The ratio of the area ratio S ₃ / S _{2 to} the actual opening area S ₂ of the opening of the discharge port is 2.1 ≦ S ₃ / S ₂ ≦ 97, (1) to (3) An underfloor space structure for natural convection air conditioning according to at least one of the preceding claims.

(5) Underfloor space structure for natural convection type air conditioning according to at least any one of (1) to (4), and the warm air generated in the air heating space, the living space, and the living space A warm air guiding portion that guides to the ceiling of the space or the vicinity thereof, and the ceiling of the living space located on the uppermost floor of the living space of the building or the vicinity thereof, and discharges a part of the warm air to the outside The building which air-conditions the said residential area space using the convection motion of natural air characterized by including the said partial warm air discharge | emission means and the said external air intake means.

  According to the underfloor space structure for natural convection-type air conditioning and the building including the same according to the present invention, the return warm air and the cool outside air are secured indoors while ensuring the return warm air and the cool outside air having a temperature difference. Can be mixed and heat-exchanged by using the action of attracting each other, thereby generating and sustaining natural, gentle and warm air convection indoors without relying on power In addition, air conditioning, humidification, and room temperature adjustment in the living space can be easily performed, and the indoor space can be warmed up to the corners of the indoor space while being well ventilated at all times. A warm and extremely comfortable living space can be provided.

Underfloor space structure (natural convection type air conditioner underfloor space structure) 1 for natural convection type air conditioning of the first embodiment and an example of a schematic configuration of a building 9 including the same are orthogonal to the rear wall portion 21 and the front wall portion 22. It is a longitudinal cross-sectional view at the time of cutting the building 9 in the vertical direction by the plane to do. It is a cross-sectional view when the building 9 is cut in a horizontal direction on a plane orthogonal to the rear wall portion 21 and the front wall portion 22, showing an example of a schematic configuration of the natural convection type air-conditioning underfloor space structure 1 of the first embodiment. . In the air mixing space 2 of the first embodiment, the building 9 is laterally arranged on a plane orthogonal to the rear wall portion 21 and the front wall portion 22, showing a plurality of examples of the configuration of the outside air intake means 7 and the space communication means 4. It is a cross-sectional enlarged view at the time of cutting. It is a top view which shows an example of a structure of the return warm air intake means 26 or the space communication means 4 of 1st embodiment. It is a longitudinal cross-sectional enlarged view at the time of cutting the building 9 in the vertical direction in the plane orthogonal to the back wall part 21 and the front wall part 22 which illustrates the natural convection type air-conditioning underfloor space structure 1 of 1st embodiment. In the figure, (a) is an enlarged longitudinal sectional view illustrating the case where the value of the area ratio S ₁ / S ₂ is the minimum value, and (b) is the value of the area ratio S ₁ / S ₂ is the maximum value. It is the said longitudinal cross-sectional enlarged view which illustrates the case where it becomes. It is a cross-sectional enlarged view at the time of cutting the building 9 in the horizontal direction in the plane orthogonal to the back wall part 21 and the front wall part 22, which illustrates the natural convection type air-conditioning underfloor space structure 1 of the first embodiment. In the figure, (a) is an enlarged cross-sectional view illustrating the case where the value of the area ratio S ₃ / S ₂ is the minimum value, and (b) is the maximum value of the area ratio S ₃ / S _2. It is the said cross-sectional enlarged view which illustrates the case where it becomes. Longitudinal section when the building 9 is cut in a vertical direction on a plane perpendicular to the rear wall portion and the front wall portion, showing an example of a schematic configuration of the natural convection type air-conditioning underfloor space structure 1 of the second embodiment and the building 9 including the same. FIG. It is a longitudinal cross-sectional enlarged view at the time of cutting the building 9 in the vertical direction in the plane orthogonal to a back wall part and a front wall part which shows the different structure of the return warm air intake means 26 in 2nd embodiment. It is a longitudinal cross-sectional enlarged view at the time of cutting the building 9 in the vertical direction in the plane orthogonal to the back wall part 21 and the front wall part 22, which illustrates the natural convection type air-conditioning underfloor space structure 1 of 2nd embodiment. In the figure, (a) is an enlarged longitudinal sectional view illustrating the case where the value of the area ratio S ₁ / S ₂ is the minimum value, and (b) is the value of the area ratio S ₁ / S ₂ is the maximum value. It is the said longitudinal cross-sectional enlarged view which illustrates the case where it becomes. It is a cross-sectional enlarged view at the time of cutting the building 9 by the plane orthogonal to the back wall part 21 and the front wall part 22 which illustrates the natural convection type air-conditioning underfloor space structure 1 of 2nd embodiment. In the figure, (a) is a cross-sectional enlarged view illustrating a case where the value of the area ratio S ₃ / S ₂ is the minimum value, and (b) is a value where the value of the area ratio S ₃ / S ₂ is the maximum value. It is the said cross-sectional enlarged view which illustrates the case where it becomes.

  Hereinafter, a first embodiment of an underfloor space structure for natural convection air conditioning according to the present invention will be described in detail with reference to the drawings. In the natural convection type air-conditioning underfloor space structure 1 of the first embodiment, in a building 9 having a residential space 8 on the first floor or a plurality of floors, the outside air OA taken from the outside to the inside and the outside air OA are warmed and indoors. An underfloor space structure 1 that air-conditions the living space 8 by generating a natural air convection motion indoors using a temperature difference with the recurrent warmed air RA that returns around As shown, it is divided in "the area under the floor of the first-floor floor FS1 with basic insulation" and "the area under the stairs 81 that connects the first-floor living space 8 and the second-floor living space 8". .

  That is, the natural convection type air-conditioning underfloor space structure 1 according to the first embodiment reliably collects the return warm air RA that has traveled around the inside of the building 9 and has taken it from the outside to the inside as shown in FIG. Utilizing the action of the outside air OA and the return warm air RA that are attracted to each other, they are thoroughly mixed and heat exchanged, and the mixed and heat exchanged mixed air MA is heated and warmed, and the generated warm air HA is inhabited. As shown in FIG. 1, a stair 81 connecting the area under the floor of the first-floor floor FS1, which is thermally insulated, and the first-floor living space 8 and the second-floor living space 8, as shown in FIG. The air mixing space 2, the air heating space 3, and the space communication means 4 are provided. In the first embodiment, the bottom of the natural convection type air-conditioning underfloor space structure 1 (in the vicinity of the ground surface GS) is constituted by the concrete board 12 and is insulated by the bottom insulation 11 constituting the basic insulation. Yes. Hereinafter, each configuration will be described in detail.

  The air mixing space 2 in the first embodiment takes the outside air OA and the return warm air RA, mixes them, exchanges heat, and generates a mixed air MA, that is, a regression that makes a round trip around the building 9. While reliably collecting the warm air RA and ensuring the outside air OA taken indoors from the outside, the outside air OA and the return warm air RA are utilized by the action of the outside air OA and the return warm air RA attracting each other. Are mixed and heat exchanged, and the four sides are surrounded by walls 21 to 24 as shown in FIG.

  As shown in FIG. 2, the wall portions 21 to 24 are a rear wall portion 21 located on the outer wall 91 side, a front wall portion 22 located opposite to the rear wall portion 21, and a left side located on the left side of the rear wall portion 21. The wall portion 23 and the right wall portion 24 located on the right side of the rear wall portion are configured, and heat insulation is applied to the inside of the air mixing space 2 surrounded on all sides by the wall portions 21 to 24. An outside air discharge port 72 of the outside air intake means 7 is arranged. Further, as shown in FIGS. 1 and 2, a return warm air intake means 26 that takes the return warm air RA into the air mixture space 2 is formed on the ceiling 25 of the air mixing space 2.

The outside air intake means 7 is means for taking outside air OA from the outside into the air mixing space 2 by utilizing the convection motion of the air generated by the temperature difference between the indoor and the outdoor air of the building 9, and this first embodiment. As shown in FIGS. 1 and 2, the outside air intake port, which is composed of one substantially S-shaped introduction pipe 73 that is heat-insulated, is an open end portion above the introduction pipe 73. 71 is penetrated through the outer wall 91 of the building 9, the introduction pipe 73 is passed through the rear wall part 21 different from the front wall part 22 in which the space communication means 4 is formed, and at the opening end part below the introduction pipe 73. A certain outside air outlet 72 is arranged inside the air mixing space 2. In other words, the outside air intake means 7 extends from one outside air inlet 71 formed in the outer wall 91 of the building 9 and extends through the rear wall portion 21, but is not limited to this in the present invention. As shown in FIGS. 3A to 3I, for example, the rear wall portion 21, the front wall portion 22, and the rear wall portion 21 extend from one or more outside air inlets 71 formed in the outer wall 91 of the building 9. Of the left wall portion 23 and the right wall portion 24, at least one wall portion different from the wall portion on which the space communication means 4 is formed, in other words, the outside air intake means 7 is shown in FIG. As described above, one or a plurality of introduction pipes 73 and one, two, or two selected from the group consisting of the rear wall portion 21, the front wall portion 22, the left wall portion 23, and the right wall portion 24 are used. It is three wall parts, Comprising: It differs from the wall part in which the space communication means 4 is formed It can be formed through the part. Note that the diameter of one or a plurality of introduction pipes 73, that is, the actual opening area S ₂ (cm ² ) of the opening of the outside air discharge port 72 described later may not be constant, and FIGS. The embodiments shown in each of these are some of those examples. In the first embodiment, the outside air discharge port 72 is, as shown in FIG. 1, the bottom of the air mixing space 2 that is a space surrounded by the walls 21 to 24 and the ceiling 25 of the air mixing space 2. In the vicinity of the ground surface GS, it is disposed at a position lower than the first floor surface FS1, in other words, below the first floor surface FS1.

  On the other hand, the return warm air intake means 26 returns to the living area space 8 without being discharged outside the building 9 even by the partial warm air discharge means 6 that discharges a part of the warm air HA circulating around the building 9 to the outside. It is a means for taking RA into the air mixing space 2 and is formed on the ceiling 25 of the air mixing space 2 as shown in FIGS. In the first embodiment, as shown in FIG. 1, the ceiling 25 of the air mixing space 2 hits a part of a predetermined range in the staircase 81, and the recurring warm air intake means 26 is the staircase 81 that is the part. Is formed on the uplift 82. Further, the structure of the return warm air intake means 26 is not particularly limited as long as it has an actual opening within a range not impairing the characteristics of the present invention. For example, as shown in FIG. 4, a plate on which a plurality of slits are formed. In addition to using a plate-shaped opening control plate or the like, a louver can be used.

In the first embodiment, the air mixing space 2, in the case of building volume 170m ³ or more 1000 m ³ or less, FIGS. 5 (a) as shown in and (b), the air mixing space 2 the rear wall portion 21 The area ratio S ₁ / of the longitudinal sectional area S ₁ (cm ² ) of the longitudinal section cut in the longitudinal direction in a plane orthogonal to the front wall portion 22 and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 It is preferable that the value of S ₂ is 9.5 ≦ S ₁ / S ₂ ≦ 70. The case where the area ratio S ₁ / S ₂ = 9.5 is, for example, as shown in FIGS. 5A and 6A, the longitudinal sectional area S ₁ is 3350 cm ² and the outside air outlet another case where the actual opening area _{S 2} of the opening 72 is 353cm ^2, and when longitudinal area _{S 1} is a 1675 cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 is 176cm ^2, A case where the longitudinal sectional area S ₁ is 5050 cm ² and the actual opening area S ₂ of the opening of the outside air outlet 72 is 530 cm ² can be exemplified. The value of the area ratio _S 1 / _{S 2} of these cases, respectively, are calculated as "3350cm ² / 353cm ^2", "1675 cm ² / 176cm ^2" and "5050cm ² / 530cm ^2". In the first embodiment, when the value of the area ratio S ₁ / S ₂ is less than 9.5, the actual opening area of the return warm air intake means 26 cannot be sufficiently ensured, and the outside air OA and the return are returned. The momentum of the flow of the mixed air MA obtained by mixing and heat exchange with the warm air RA is deteriorated, and as a result, it becomes difficult to generate natural air convection motion indoors. On the other hand, when the area ratio S ₁ / S ₂ = 70, for example, as shown in FIGS. 5B and 6B, the longitudinal cross-sectional area S ₁ is 24750 cm ² and the outside air discharge port another case where the actual opening area _{S 2} of the opening 72 is 353cm ^2, and when longitudinal area _{S 1} is a 12300cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 is 176cm ^2, Examples include a case where the longitudinal sectional area S ₁ is 37200 cm ² and the actual opening area S ₂ of the opening of the outside air discharge port 72 is 530 cm ² . The value of the area ratio _S 1 / _{S 2} of these cases, respectively, are calculated as "24750cm ² / 353cm ^2", "12300cm ² / 176cm ^2" and "37200cm ² / 530cm ^2". In the first embodiment, when the value of the area ratio S ₁ / S ₂ exceeds 70, the outdoor air OA taken from the outside to the indoors and the return warm air RA can be reliably mixed to exchange heat. As a result, the air mixing space 2 does not become low temperature, and it becomes difficult to generate natural air convection motion indoors. The “actual opening area of the opening” in the first embodiment refers to the area of the net opening portion of the opening. For example, when an opening control plate is provided in the opening, the opening control plate, etc. The area of the part that is actually opened, excluding the area occupied by the part.

Further, in the first embodiment, the air mixing space 2, in the case of building volume 170m ³ or more 1000 m ³ or less, as shown in FIG. 6 (a) and (b), the air mixing space 2 rear wall Area ratio S between the cross-sectional area S ₃ (cm ² ) of the cross section cut in the horizontal direction in a plane orthogonal to the portion 21 and the front wall portion 22 and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 value of ₃ / _{S 2} is preferably formed such that _{5.1 ≦ S 3 / S 2 ≦} 97. The case where the area ratio S ₃ / S ₂ = 5.1 means, for example, that the cross-sectional area S ₃ is 1800 cm ² as shown in FIGS. another case where the actual opening area _{S 2} of the opening 72 is 353cm ^2, and if the cross-sectional area _{S 3} a 900 cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 is 176cm ^2, cross-sectional area _{S 3} is a 2700 cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 and the like when it is 530 cm ^2. The value of the area ratio _S 3 / _{S 2} of these cases, respectively, are calculated as "1800cm ² / 353cm ^2", "900 cm ² / 176cm ^2" and "2700 cm ^2/530 cm ^2". In the first embodiment, when the value of the area ratio S ₃ / S ₂ is less than 5.1, the actual opening area of the return warm air intake means 26 cannot be sufficiently secured, and the outside air OA and the return are returned. The momentum of the flow of the mixed air MA obtained by mixing and heat exchange with the warm air RA is deteriorated, and as a result, it becomes difficult to generate natural air convection motion indoors. On the other hand, the case where the area ratio S ₃ / S ₂ = 97 means that the cross-sectional area S ₃ is 34300 cm ² as shown in FIG. 5B and FIG. another case where the actual opening area _{S 2} of the opening 72 is 353cm ^2, and if the cross-sectional area _{S 3} a 17100cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 is 176cm ^2, cross-sectional area _{S 3} is a 51500cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 and the like when it is 530 cm ^2. The value of the area ratio _S 3 / _{S 2} of these cases, respectively, are calculated as "34300cm ² / 353cm ^2", "17100cm ² / 176cm ^2" and "51500cm ² / 530cm ^2". When the area ratio S ₃ / S ₂ exceeds 97, the outside air OA taken from the outside to the inside cannot be reliably mixed and heat exchanged, and as a result, the air mixing space 2 has a low temperature. It becomes difficult to generate natural air convection motion indoors.

In the first embodiment, when the building volume is less than 170 m ³ , the longitudinal sectional area S ₁ of the longitudinal section obtained by cutting the air mixing space 2 in the longitudinal direction on a plane orthogonal to the rear wall portion 21 and the front wall portion 22. (Cm ² ) and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 are mixed so that the value of the area ratio S ₁ / S ₂ is 9.5 ≦ S ₁ / S ₂ ≦ 70. The formation of the space 2 itself, or the cross-sectional area S ₃ (cm ² ) of the cross section obtained by cutting the air mixing space 2 in the lateral direction on a plane orthogonal to the rear wall portion 21 and the front wall portion 22 and the outside air outlet 72 It becomes difficult to form the air mixing space 2 so that the value of the area ratio S ₃ / S _{2 to} the actual opening area S ₂ (cm ² ) of the opening satisfies 5.1 ≦ S ₃ / S ₂ ≦ 97. , if the building volume is larger than 1000 m ^3, rear wall 21 and front Longitudinal vertical section taken along the air mixing space 2 in the longitudinal direction in a plane perpendicular to the part 22 the area _S 1 (cm @ 2) and external air outlet 72 of the actual opening area of the opening _S 2 (cm ²⁾ area ratio of the _{S 1} Even if the air mixing space 2 is formed so that the value of / S ₂ is 9.5 ≦ S ₁ / S ₂ ≦ 70, or the air mixing space 2 is a plane orthogonal to the rear wall portion 21 and the front wall portion 22. The ratio of the area ratio S ₃ / S ₂ between the cross-sectional area S ₃ (cm ² ) of the cross section cut in the horizontal direction and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 is 5.1 ≦ Even if the air mixing space 2 is formed so that S ₃ / S ₂ ≦ 97, the air mixing space 2 does not become low temperature, and it becomes difficult to generate natural air convection motion indoors.

From the above, in the first embodiment, the air mixing space 2 is a value of the ratio V / S ₂ between the volume V (cm ³ ) of the air mixing space 2 and the opening area S ₂ (cm ² ) of the outside air outlet 72. However, it can be said that it is preferable to form such that 256 ≦ V / S ₂ ≦ 12971.

  The air heating space 3 in the first embodiment is a space in which the mixed air MA is heated to generate the warm air HA, that is, the mixed air obtained by mixing the outside air OA and the return warm air RA and exchanging heat. This is a space for heating the MA and generating warm air HA, and a heat source 31 is provided as shown in FIGS. The heat source 31 is not limited to the bottom of the air heating space 3, but may be disposed at any position in the air heating space 3. However, as shown in FIG. The air heating space 3 corresponding to the vicinity of the opening 52 formed on the first floor surface FS1 of the duct 51 of the warm air guiding portion 5 or the opening 52 of the warm air guiding portion 5 on the bottom of the air warming space 3 that hits the vicinity. It is preferable to arrange on the bottom. Further, as the heat source 31, a kerosene stove, a gas stove, a heat pump, a regenerative heater (it is not necessary to select one with a large amount of heat), or a heating device such as a fuel cell, alone or in combination Can be used. Further, the air warming space 3 may be provided with a humidifying means 32 as desired. The humidifying means 32 is, for example, on the bottom of the air warming space 3, as shown in FIG. It can be arranged on the ceiling of the space 3, that is, on the first floor.

  The space communication means 4 in the first embodiment is a means for allowing the mixed air MA to flow through the air mixing space 2 and the air heating space 3. In the first embodiment, the space communication means 4 is formed on the front wall portion 22 as shown in FIGS. 1 and 2, but the present invention is not limited to this, and as shown in FIG. In addition, for example, at least one of the rear wall portion 21, the front wall portion 22, the left wall portion 23, and the right wall portion 24 is different from the wall portion through which the outside air intake means 7 is provided. In other words, one, two, or three walls selected from the group consisting of the rear wall 21, the front wall 22, the left wall 23, and the right wall 24, the outside air intake means It can be formed on a wall portion different from the wall portion through which 7 is provided. In addition, the aspect shown in FIG. 3 is a part of the example. Moreover, the structure of the space communication means 4 in the first embodiment is not particularly limited as long as it has an actual opening within a range that does not impair the characteristics of the present invention, but is formed by forming an opening in the wall portion. In addition, as shown in FIG. 4, for example, a plate-like opening control plate in which a plurality of slits are formed can be used, and a louver can be used.

In the first embodiment, it goes without saying that the natural convection type air-conditioning underfloor space structure 1 may include one or a plurality of air mixing spaces 2, air heating spaces 3, and space communication means 4, respectively. As such a configuration, for example, the air mixing space 2 may be provided for each building volume unit of 170 m ³ or more and 1000 m ³ or less. Specifically, for example, when the building volume is 1500 m ³ , 2 to 9 air mixing spaces 2 may be provided, and when the building volume is 2000 m ³ , 2 to 12 air mixing spaces 2 may be provided. When the volume is 3000 m ³ , ³ to 18 air mixing spaces 2 may be provided. In the first embodiment, the natural convection type air-conditioning underfloor space structure 1 has a configuration other than the air mixing space 2, the air heating space 3, and the space communication means 4 as long as the characteristics of the present invention are not impaired. Needless to say, it is good.

  Next, a second embodiment of the underfloor space structure for natural convection air conditioning according to the present invention will be described in detail with reference to the drawings.

  In the natural convection type air-conditioning underfloor space structure 1 of the second embodiment, in a building 9 having a residential space 8 on the first floor or a plurality of floors, the outside air OA taken from the outside to the inside and the outside air OA are heated and indoors. The underfloor space structure 1 that air-conditions the living space 8 by generating a natural air convection motion indoors using a temperature difference with the recurrent warmed air RA that returns around As shown, it is partitioned in the “area under the floor of the first floor surface FS1 that has been thermally insulated”.

  That is, the natural convection type air-conditioning underfloor structure 1 according to the second embodiment reliably collects the recurring warm air RA that circulates around the inside of the building 9 and takes it from the outside to the inside as shown in FIG. Utilizing the action of the outside air OA and the return warm air RA that are attracted to each other, they are thoroughly mixed and heat exchanged, and the mixed and heat exchanged mixed air MA is heated and warmed, and the generated warm air HA is inhabited. As shown in FIG. 7, it is divided in the area under the floor of the first-floor floor FS1 that is fundamentally insulated, and is connected to the air mixing space 2, the air heating space 3, and the space communication. Means 4 are provided. Hereinafter, each configuration will be described in detail. In addition, in the natural convection type air-conditioning underfloor space structure 1 of the second embodiment, the same or corresponding / corresponding configuration to the configuration of the natural convection type air-conditioning underfloor space structure 1 of the first embodiment described above is given the same reference numeral. In addition, about the structure which is not demonstrated in this 2nd embodiment, description is abbreviate | omitted similarly to 1st embodiment.

  In the second embodiment, the return warm air intake means 26 is not discharged outside the building 9 by the partial warm air discharge means 6 that discharges a part of the warm air HA that has circulated in the building 9 to the outside. It is a means for taking in the return warm air RA which returned to the air mixing space 2, and, as shown in FIG. 7, a predetermined part of the first floor surface FS1, in other words, of the first floor surface FS1. The predetermined range is the ceiling 25 of the air mixing space 2 and is formed on the ceiling 25 of the air mixing space 2. However, the present invention is not limited to this, and as shown in FIG. Is provided on the first floor FS1 so as to communicate with the air mixing space 2, and the partition plate D that closes the cylindrical portion 27 is closed by the ceiling 25 of the air mixing space 2. 2 as the ceiling 25 of the air mixing space 2 It may be formed in the ceiling 25.

In the second embodiment, when the building volume is 150 m ³ or more and 950 m ³ or less, as shown in FIGS. 9A and 9B, the air mixing space 2 is formed on the rear wall portion 21. The area ratio S ₁ / of the longitudinal sectional area S ₁ (cm ² ) of the longitudinal section cut in the longitudinal direction in a plane orthogonal to the front wall portion 22 and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 the value of S ₂ is preferably formed such that _{2.4 ≦ S 1 / S 2 ≦} 50. The case where the area ratio S ₁ / S ₂ = 2.4 is, for example, as shown in FIGS. 9A and 10A, the longitudinal sectional area S ₁ is 850 cm ² and the outside air outlet. another case where the actual opening area _{S 2} of the opening 72 is 353cm ^2, and when longitudinal area _{S 1} is a 425 cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 is 176cm ^2, Examples include a case where the longitudinal sectional area S ₁ is 1250 cm ² and the actual opening area S ₂ of the opening of the outside air discharge port 72 is 530 cm ² . The value of the area ratio _S 1 / _{S 2} of these cases, respectively, are calculated as "850cm ² / 353cm ^2", "425 cm ² / 176cm ^2" and "1250 cm ^2/530 cm ^2". In the second embodiment, when the value of the area ratio S ₁ / S ₂ is less than 2.4, the actual opening area of the return warm air intake means 26 cannot be sufficiently secured, and the outside air OA and the return are returned. The momentum of the flow of the mixed air MA obtained by mixing and heat exchange with the warm air RA is deteriorated, and as a result, it becomes difficult to generate natural air convection motion indoors. On the other hand, when the area ratio S ₁ / S ₂ = 50, for example, as shown in FIGS. 9B and 10B, the longitudinal cross-sectional area S ₁ is 17500 cm ² and the outside air outlet another case where the actual opening area _{S 2} of the opening 72 is 353cm ^2, and when longitudinal area _{S 1} is a 8800cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 is 176cm ^2, A case where the longitudinal sectional area S ₁ is 26500 cm ² and the actual opening area S ₂ of the opening of the outside air discharge port 72 is 530 cm ² can be exemplified. The value of the area ratio _S 1 / _{S 2} of these cases, respectively, are calculated as "17500cm ² / 353cm ^2", "8800cm ² / 176cm ^2" and "26500cm ² / 530cm ^2". In the second embodiment, when the value of the area ratio S ₁ / S ₂ exceeds 50, the outdoor air OA taken from the outdoors to the indoors and the return warm air RA can be reliably mixed to exchange heat. As a result, the air mixing space 2 does not become low temperature, and it becomes difficult to generate natural air convection motion indoors.

In the second embodiment, when the building volume is 150 m ³ or more and 950 m ³ or less, as shown in FIGS. 10 (a) and (b), the air mixing space 2 is arranged on the rear wall. Area ratio S between the cross-sectional area S ₃ (cm ² ) of the cross section cut in the horizontal direction in a plane orthogonal to the portion 21 and the front wall portion 22 and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 It is preferable that the value of ₃ / S ₂ is 2.1 ≦ S ₃ / S ₂ ≦ 97. When the area ratio S ₃ / S ₂ = 2.1, as shown in FIG. 10A, the cross-sectional area S ₃ is 740 cm ² and the actual opening area S of the opening of the outside air outlet 72 is set. another case ₂ is 353Cm ^2, the cross-sectional area _{S 3} is a 375Cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 and when a 176cm ^2, in cross-sectional area _{S 3} is 1100 cm ² there are, and the real opening area _{S 2} of the opening of the external air outlet 72 and the like when it is 530 cm ^2. The value of the area ratio _S 3 / _{S 2} of these cases, respectively, are calculated as "740cm ² / 353cm ^2", "375cm ² / 176cm ^2" and "1100 cm ^2/530 cm ^2". In the second embodiment, when the value of the area ratio S ₃ / S ₂ is less than 2.1, the actual opening area of the return warm air intake means 26 cannot be sufficiently secured, and the outside air OA and the return are returned. The momentum of the flow of the mixed air MA obtained by mixing and heat exchange with the warm air RA is deteriorated, and as a result, it becomes difficult to generate natural air convection motion indoors. On the other hand, when the area ratio S ₃ / S ₂ = 97, as shown in FIG. 10B, the cross-sectional area S ₃ is 34250 cm ² and the actual opening area S of the opening of the outside air outlet 72 is set. another case ₂ is 353Cm ^2, the cross-sectional area _{S 3} is a 17100Cm ^2, and the real opening area _{S 2} of the opening of the external air outlet 72 and when a 176cm ^2, in cross-sectional area _{S 3} is 51395Cm ² there are, and the real opening area _{S 2} of the opening of the external air outlet 72 and the like when it is 530 cm ^2. The value of the area ratio _S 3 / _{S 2} of these cases, respectively, are calculated as "34250cm ² / 353cm ^2", "17100cm ² / 176cm ^2" and "51395cm ² / 530cm ^2". In the second embodiment, when the area ratio S ₃ / S ₂ exceeds 97, the outdoor air OA taken from the outside to the indoors and the return warm air RA cannot be reliably mixed and heat-exchanged. As a result, the air mixing space 2 does not become low temperature, and it becomes difficult to generate natural air convection motion indoors.

In the second embodiment, when the building volume is less than 150 m ³ , the longitudinal sectional area S ₁ of the longitudinal section obtained by cutting the air mixing space 2 in the longitudinal direction on a plane orthogonal to the rear wall portion 21 and the front wall portion 22. (Cm ² ) and the area ratio S ₁ / S ₂ between the actual opening area S ₂ (cm ² ) of the open air outlet 72 and the air so that the value of 2.4 ≦ S ₁ / S ₂ ≦ 50 is satisfied. The cross-sectional area S ₃ (cm ² ) of the cross section obtained by forming the mixing space 2 itself, or by cutting the air mixing space 2 in a horizontal direction on a plane orthogonal to the rear wall portion 21 and the front wall portion 22, and the outside air discharge port 72. The air mixing space 2 itself is formed so that the value of the area ratio S ₃ / S _{2 to} the actual opening area S ₂ (cm ² ) of the opening of the opening is 2.1 ≦ S ₃ / S ₂ ≦ 97. becomes difficult, if building volume is larger than 950 meters ^3, rear wall 21 and front Area ratio of the wall portion 22 longitudinal area of the longitudinal section taken along the air mixing space 2 in the longitudinal direction in a plane perpendicular to the S _{1 (cm} ²⁾ and the external air outlet 72 of the actual opening area S ₂ of the opening _(cm ²⁾ Even if the air mixing space 2 is formed so that the value of S ₁ / S ₂ is 2.4 ≦ S ₁ / S ₂ ≦ 50, or the air is in a plane perpendicular to the rear wall portion 21 and the front wall portion 22. The value of the area ratio S ₃ / S ₂ between the cross-sectional area S ₃ (cm ² ) of the cross section obtained by transversely cutting the mixing space 2 and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 is Even if the air mixing space 2 is formed so that 2.1 ≦ S ₃ / S ₂ ≦ 97, the air mixing space 2 does not become low temperature, and it is difficult to generate natural air convection motion indoors. Become.

As described above, in the second embodiment, the air mixing space 2 is a ratio V / S between the volume V (cm ³ ) of the air mixing space 2 and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72. _It can be said that it is preferable to form such that the value of ₂ satisfies 67 ≦ V / S ₂ ≦ 9221.

In the second embodiment, it goes without saying that the natural convection type air-conditioning underfloor space structure 1 may include one or a plurality of air mixing spaces 2, air heating spaces 3, and space communication means 4, respectively. As such a configuration, for example, the air mixing space 2 may be provided for each building volume unit of 150 m ³ or more and 950 m ³ or less. Specifically, for example, when the building volume is 1500 m ³ , 2 to 10 air mixing spaces 2 may be provided, and when the building volume is 2000 m ³ , ³ to 14 air mixing spaces 2 may be provided. When the volume is 3000 m ³ , 4 to 20 air mixing spaces 2 may be provided. Moreover, in this 2nd embodiment, the natural convection type | formula air-conditioning underfloor space structure 1 is equipped with structures other than the air mixing space 2, the air heating space 3, and the space communication means 4 in the range which does not impair the characteristic of this invention. Needless to say, it is good.

  Next, an embodiment of a building that air-conditions a residential area space using natural air convection motion according to the present invention will be described in detail with reference to the drawings. In addition, among the buildings 9 that air-condition the living area space using the natural air convection motion of the present embodiment, the configuration of the natural convection type air-conditioning underfloor space structure 1 of the first embodiment and the second embodiment described above. The same or corresponding / corresponding components are denoted by the same reference numerals and the description thereof is omitted. As shown in FIGS. 1 and 7, the building 9 of the present embodiment includes a natural convection type under-floor space structure 1 for air conditioning, a warm air guiding portion 5, a partial warm air discharge means 6, and an outside air intake means 7. ing. Hereinafter, each configuration will be described in detail.

  The warm air guiding unit 5 guides the warm air HA generated in the air warming space 3 to the living area space 8 and the ceiling 83 of the living area space 8 or the vicinity thereof. In the present embodiment, the warm air guiding portion 5 includes a duct 51 of the warm air guiding portion 5 and a plurality of openings 52, as shown in FIGS. Moreover, in this embodiment, the opening 52 is formed in the 1st floor surface FS1 and the 2nd floor surface FS2 which partition the residential area space 8 and the residential area space 8, as shown in FIG.1 and FIG.7. ing.

  The partial warm air discharge means 6 is formed at or near the ceiling 83 of the living area space 8 located on the uppermost floor of the living area space 8 of the building 9, and discharges a part of the return warm air RA to the outside. Means. In the present embodiment, as shown in FIG. 1, the partial warm air discharge means 6 is constituted by a partial warm air exhaust port 61 formed in the vicinity of the ceiling 83 of the living area space 8, as shown in FIG. As shown in the figure, a partial warm air exhaust port 61, a partial warm air exhaust cylinder 62 and a partial warm air exhaust port 63 are provided.

  In the present embodiment, the building 9 that air-conditions the living area space using natural air convection motion includes a natural convection type air-conditioning underfloor space structure 1, a warm air guiding portion 5, a partial warm air discharge means 6, and an outside air intake means. It goes without saying that one or a plurality of 7 may be provided. Further, in the present embodiment, the building 9 that air-conditions the living area space using natural air convection motion is within the range that does not impair the features of the present invention. 5. Needless to say, a configuration other than the partial warm air discharge means 6 and the outside air intake means 7 may be provided.

  Next, the operation of the underfloor space structure 1 for natural convection-type air conditioning and the building 9 that air-conditions the living space using natural air convection motion according to the present embodiment will be described in detail with reference to the drawings. .

  First, the heat source 31 of the air heating space 3 is operated, and the outside air intake port 71 and the outside air discharge port 72 of the outside air intake means 7 are opened. As shown in FIGS. 1 and 7, the warm air HA generated by being heated by the heat source 31 tends to reach the living space 8 through the duct 51 and the plurality of openings 52 of the warm air guiding portion 5. As shown in FIGS. 1 and 7, a part of the warm air HA reaches the ceiling 83 of the living area space 8 located on the uppermost floor of the living area space 8 or the vicinity thereof, and further a part of the reached warm air HA. As shown in FIG. 1 and FIG. 7, the warm air discharge means 6 partially discharges the water to the outside of the building 9.

  As shown in FIGS. 1 and 7, the warm air HA that has not been discharged to the outside of the building 9 by the partial warm air discharge means 6 is a part of the warm air HA that circulates in the building 9 through the opening 52 of the living space 8. The return warming air RA is obtained. The return warm air RA is taken into the air mixing space 2 through the return warm air intake means 26 as shown in FIGS. 1 and 7 under the influence of the cool outside air OA taken into the building 9 by the outside air intake means 7. It is.

  The return warm air RA taken into the air mixing space 2 and the cool outside air OA taken into the building 9 by the outside air intake means 7 are the return warm air intake means 26 and the outside air as shown in FIGS. Since the discharge port 72 is located in the vicinity of each other and the outside air discharge port 72 is disposed at a position lower than the first floor surface FS, the outside air OA is being reliably taken from the outside of the building 9 to the inside. , By mixing with each other by the action of attracting each other, heat is exchanged with each other to become mixed air MA.

  As shown in FIGS. 1 and 7, the generated mixed air MA circulates in the space communication means 4 because the space communication means 4, the return warm air intake means 26, and the outside air discharge port 72 are located in the vicinity of each other. That is, it moves to the air heating space 3 via the space communication means 4. As shown in FIGS. 1 and 7, the moved mixed air MA is heated by the heat source 31 to become warm air HA, and the generated warm air HA again passes through the duct 51 and the plurality of openings 52 of the warm air guiding portion 5 to the living area. Trying to go to space 8. In this way, natural air convection motion occurs inside the building 9, and the living space 8 can be air-conditioned.

According to the above-described underfloor space structure 1 for natural convection air conditioning and the building 9 that air-conditions the living space using natural air convection motion according to the present embodiment, the following effects can be obtained. it can.
1. In the building 9 indoors, while ensuring the return warm air RA and the outside air OA having a temperature difference, the outside air OA and the return warm air RA are firmly secured by utilizing the action of the taken outside air OA and the return warm air RA attracting each other. And heat exchange.
2. Inside the building 9, it is possible to generate and sustain convection of air with a gentle warmth without relying on power.
3. Air conditioning, humidification, and room temperature adjustment in the living area space 8 can be easily performed.
4). The indoor space of the building 9 can be warmed up evenly in the living area 8 while being always well ventilated.
5. An extremely comfortable living space 8 with natural warmth can be provided.

  Note that the underfloor space structure for natural convection-type air conditioning according to the present invention and the building that air-conditions the residential area space using natural air convection motion are not limited to the above-described embodiments. It can change suitably in the range which does not impair the characteristic of invention.

  For example, as long as the characteristics of the present invention are not impaired, the shape and configuration of the outside air intake means 7 may be changed, or the return warm air intake means 26 may be opened.

  Hereinafter, an underfloor space structure for natural convection type air conditioning according to the present invention and a building that air-conditions a residential area space using natural air convection motion will be described based on examples. Note that the technical scope of the present invention is not limited to the features shown by these examples.

<Example 1>
When the building volume is 500 m ^{3 in} the first embodiment of the underfloor space structure 1 for natural convection air conditioning according to the present invention, the air mixing space 2 is defined by a plane orthogonal to the rear wall portion 21 and the front wall portion 22. A longitudinal sectional area S ₁ of a longitudinal section cut in the longitudinal direction, a transverse area S ₃ of a transverse section obtained by transversely cutting the air mixing space 2 in a plane orthogonal to the rear wall portion 21 and the front wall portion 22, or the air mixing space 2 and the volume V of the space region of the ratio between the actual opening area S ₂ of the opening of the external air outlet 72 of the outside-air intake means 7, regression warm RA, outside air OA, to simulate the flow of mixed air MA, by evaluating A comparative study was conducted. In the evaluation, “not good flow” is “▲”, “normal flow” is “△”, “good flow” is “◯”, and “flow is considerably good” is “「 ”. The results are shown in Table 1, Table 2, Table 3 and Table 4.

[Table 1]

[Table 2]

[Table 3]

[Table 4]

As shown in Table 1, Table 2, Table 3, and Table 4, the air mixing space 2 in the first embodiment is a plane perpendicular to the rear wall portion 21 and the front wall portion 22 in the air mixing space 2 in the vertical direction. The value of the area ratio S ₁ / S ₂ between the longitudinal sectional area S ₁ (cm ² ) of the cut longitudinal section and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 is 9.5 ≦ S ₁ / It is preferable to form so as to satisfy S ₂ ≦ 70, and the cross-sectional area S ₃ (cm) of the cross section obtained by cutting the air mixing space 2 in a horizontal direction along a plane orthogonal to the rear wall portion 21 and the front wall portion 22. ² ) and the ratio of the area ratio S ₃ / S _{2 to} the actual opening area S ₂ (cm ² ) of the opening of the outside air discharge port 72 is 5.1 ≦ S ₃ / S ₂ ≦ 97. it is preferred, and volume V (cm ³⁾ of the air mixing space 2 and the actual opening of the opening of the external air outlet 72 The value of the ratio V / _{S 2} and the product _S ² (cm 2) is to be formed such that 256 ≦ V / _{S 2} ≦ 12971 was found to be suitable.

<Example 2>
In the second embodiment of the underfloor space structure 1 for natural convection air conditioning according to the present invention, when the building volume is 500 m ³ , the air mixing space 2 is formed on a plane perpendicular to the rear wall portion 21 and the front wall portion 22. A longitudinal sectional area S ₁ of a longitudinal section cut in the longitudinal direction, a transverse area S ₃ of a transverse section obtained by transversely cutting the air mixing space 2 in a plane orthogonal to the rear wall portion 21 and the front wall portion 22, or the air mixing space 2 and the volume V of the space region of the ratio between the actual opening area S ₂ of the opening of the external air outlet 72 of the outside-air intake means 7, regression warm RA, outside air OA, to simulate the flow of mixed air MA, by evaluating A comparative study was conducted. In the evaluation, “not good flow” is “▲”, “normal flow” is “△”, “good flow” is “◯”, and “flow is considerably good” is “「 ”. The results are shown in Table 5, Table 6, Table 7 and Table 8.

[Table 5]

[Table 6]

[Table 7]

[Table 8]

As shown in Table 5, Table 6, Table 7, and Table 8, the air mixing space 2 in the second embodiment is a plane that is perpendicular to the rear wall portion 21 and the front wall portion 22 in the air mixing space 2 in the vertical direction. The value of the area ratio S ₁ / S ₂ between the longitudinal sectional area S ₁ (cm ² ) of the cut longitudinal section and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 is 2.4 ≦ S ₁ / It is preferable to form so that S ₂ ≦ 50, and the cross-sectional area S ₃ (cm) of the cross section obtained by cutting the air mixing space 2 in the horizontal direction along a plane orthogonal to the rear wall portion 21 and the front wall portion 22 ² ) and the area ratio S ₃ / S ₂ between the opening of the outside air outlet 72 and the actual opening area S ₂ (cm ² ) is set to satisfy 2.1 ≦ S ₃ / S ₂ ≦ 97. it is preferred, and volume V (cm ³⁾ of the air mixing space 2 and the actual opening of the opening of the external air outlet 72 The value of the ratio V / _{S 2} and the product _S ² (cm 2) is revealed that it is preferable to form such that _{67 ≦ V / S 2 ≦ 9221} .

<Example 3>
About the air mixing space 2 of the first embodiment and the second embodiment of the underfloor space structure 1 for natural convection air conditioning according to the present invention, the air mixing space 2 is a plane perpendicular to the rear wall portion 21 and the front wall portion 22. The ratio of the area ratio S ₁ / S ₂ between the vertical cross-sectional area S ₁ (cm ² ) of the vertical cross-section cut in the vertical direction and the actual opening area S ₂ (cm ² ) of the outside air outlet 72 is 9.5 ≦ When S ₁ / S ₂ ≦ 70 (in the case of the first embodiment) and 2.4 ≦ S ₁ / S ₂ ≦ 50 (in the case of the second embodiment), and the rear wall portion 21 and the front wall portion 22 Area ratio S ₃ / of the cross-sectional area S ₃ (cm ² ) of the cross section obtained by cutting the air mixing space 2 in the horizontal direction on a plane orthogonal to the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 The value of S ₂ is 5.1 ≦ S ₃ / S ₂ ≦ 97 (in the case of the first embodiment) and 2.1 The building volume in the case of ≦ S ₃ / S ₂ ≦ 97 (in the case of the second embodiment) was compared and examined by simulating and evaluating the flow of the recurrent warm air RA, the outside air OA, and the mixed air MA. The evaluation was performed with “x” cannot be formed as “air mixing space 2”, “▲” as “not good flow”, “good” as “good”, and “good” as “good”. . The results are shown in Table 9, Table 10, and Table 11.

[Table 9]

[Table 10]

[Table 11]

As shown in Table 9 and Table 11, in the first embodiment, when the building volume is 160 m ³ , the air mixing space 2 cannot be formed, and when the building volume is 170 m ³ or more and 1000 m ³ or less, the regression is performed. The flow of warm air RA, outside air OA, and mixed air MA was good, and when the building volume was 1050 m ³ , the flow of recurrent warm air RA, outside air OA, and mixed air MA was not good. As shown in Table 10 and Table 11, in the second embodiment, when the building volume is 140 m ³ , the air mixing space 2 cannot be formed, and the building volume is 150 m ³ or more and 950 m ³ or less. The flow of the return warm air RA, the outside air OA, and the mixed air MA was good. When the building volume was 1000 m ³ , the flow of the return warm air RA, the outside air OA, and the mixture air MA was not good. From these, the air mixing space 2 according to the present invention, when building volume of 150 meters ³ above 1000 m ³ or less, in a plane perpendicular to the rear wall 21 and front wall 22 of the air mixing space 2 in the longitudinal direction The value of the area ratio S ₁ / S ₂ between the longitudinal sectional area S ₁ (cm ² ) of the cut longitudinal section and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 is 2.4 ≦ S ₁ / It is preferable to form so as to satisfy S ₂ ≦ 70, and the cross-sectional area S ₃ (cm ²⁾ of the cross section obtained by cutting the air mixing space 2 in the horizontal direction on a plane orthogonal to the rear wall portion 21 and the front wall portion 22. ) And the actual opening area S ₂ (cm ² ) of the opening of the outside air discharge port 72, the area ratio S ₃ / S ₂ may be 2.1 ≦ S ₃ / S ₂ ≦ 97. It became clear that it was suitable.

1. Underfloor space structure for natural convection air conditioning (natural convection air conditioning underfloor structure)
DESCRIPTION OF SYMBOLS 2 Air mixing space 3 Air heating space 4 Spatial communication means 5 Warm air induction | guidance | derivation part 6 Partial warm air discharge | emission means 7 Outside air intake means 8 Living area space 9 Building 11 Bottom part heat insulating material 12 Concrete board 21 Back wall part 22 Front wall part 23 Left Side wall portion 24 Right side wall portion 25 Ceiling of air mixing space (2) 26 Returning warm air intake means 27 Tube portion 31 Heat source 32 Humidifying means 51 Duct 52 (of warm air induction portion 5) 61 Partial warm air exhaust port 62 Partially Warm air exhaust 63 Partial warm air outlet 71 Outside air inlet 72 Outside air outlet 73 Introducing pipe 81 Stairs 82 Kicking up of 83 (stair 81) 83 Ceiling of living space (8) 91 Outer wall FS1 First floor floor FS2 Second floor GS Ground surface HA Warm air MA Mixed air OA Outside air RA Return warm air

As shown in Table 9 and Table 11, in the first embodiment, when the building volume is 160 m ³ , the air mixing space 2 cannot be formed, and when the building volume is 170 m ³ or more and 1000 m ³ or less, the regression is performed. The flow of warm air RA, outside air OA, and mixed air MA was good, and when the building volume was 1050 m ³ , the flow of recurrent warm air RA, outside air OA, and mixed air MA was not good. As shown in Table 10 and Table 11, in the second embodiment, when the building volume is 140 m ³ , the air mixing space 2 cannot be formed, and the building volume is 150 m ³ or more and 950 m ³ or less. The flow of the return warm air RA, the outside air OA, and the mixed air MA was good. When the building volume was 1000 m ³ , the flow of the return warm air RA, the outside air OA, and the mixture air MA was not good. For these reasons, the air mixing space 2 according to the present invention vertically extends the air mixing space 2 on a plane orthogonal to the rear wall portion 21 and the front wall portion 22 when the building volume is 170 m ³ or more and 950 m ³ or less. The value of the area ratio S ₁ / S ₂ between the longitudinal sectional area S ₁ (cm ² ) of the longitudinal section cut in the direction and the actual opening area S ₂ (cm ² ) of the opening of the outside air outlet 72 is 9.5 ≦ S It is preferable to form such that ₁ / S ₂ ≦ 50, and the cross-sectional area S ₃ of the cross section obtained by cutting the air mixing space 2 in the horizontal direction on a plane orthogonal to the rear wall portion 21 and the front wall portion 22 ( cm ² ) and the area ratio S ₃ / S ₂ between the actual opening area S ₂ (cm ² ) of the opening of the outside air discharge port 72 and 5.1 ≦ S ₃ / S ₂ ≦ 97. It became clear that it was suitable.

Claims (5)

In a building having a residential space on the first floor or a plurality of floors, using the temperature difference between the outside air taken from the outside to the inside and the return warm air that is warmed and returned to the inside by the outside air, The area under the floor of the first floor with basic insulation, or the area under the floor of the first floor with basic insulation, and the living area space of the first floor, which generates natural air convection to air-condition the living area. An underfloor space structure for natural convection air conditioning partitioned in the area under the stairs connecting the living space on the second floor,
An air mixing space that takes in the outside air and the return warm air, mixes and exchanges heat to generate mixed air;
An air heating space for heating the mixed air to generate warm air;
A space communication means for allowing the mixed air to flow through the air mixing space and the air heating space;
Four sides of the air mixing space are surrounded by walls,
A return warm air intake means for taking the return warm air into the air mixture space is formed on the ceiling of the air mixture space,
Inside the air mixing space, an outside air outlet of an outside air intake means subjected to heat insulation is arranged,
The outside air intake means extends from an outside air inlet formed on the outer wall of the building, and constitutes a wall portion that surrounds the four sides of the air mixing space, and includes a rear wall portion, a front wall portion, a left wall portion, and a right wall portion. Of the side wall portion, it is penetrated in at least one wall portion different from the wall portion in which the space communication means is formed,
A heat source is disposed inside the air heating space,
The space communication means is at least one of the rear wall portion, the front wall portion, the left wall portion, and the right wall portion that is different from a wall portion through which the outside air intake means is provided. Formed on the wall,
And,
The outside air discharge port is disposed at a position lower than the floor surface of the first floor, and the space communication means, the return warm air intake means, and the outside air discharge port are located in the vicinity of each other. The underfloor space structure.   The underfloor space structure for natural convection air conditioning according to claim 1, wherein a ceiling of the air mixing space is a predetermined portion of the first floor surface, the partition plate, or a staircase. When building volume of 150 meters ³ above 1000 m ³ or less, of the rear wall portion and said front wall and a plane perpendicular said a longitudinal area S ₁ of a longitudinal section taken along the air mixing space in the longitudinal direction the external air outlet the value of the area ratio _S 1 / _{S 2} of the actual opening area _{S 2} of the openings, characterized in that it is a _{2.4 ≦ S 1 / S 2 ≦} 70, nature according to claim 1 or claim 2 Underfloor space structure for convection air conditioning. When building volume of 150 meters ³ above 1000 m ³ or less, of the rear wall section and the said air mixing space in a plane perpendicular to the front wall and the cross-sectional area S ₃ of the cross-section taken along the transverse direction the external air outlet The value of the area ratio S ₃ / S _{2 to} the actual opening area S ₂ of the opening is 2.1 ≦ S ₃ / S ₂ ≦ 97, at least one of claims 1 to 3 The underfloor space structure for natural convection air conditioning according to one item. An underfloor space structure for natural convection air conditioning according to at least one of claims 1 to 4,
A warm air guiding section for guiding the warm air generated in the air warming space to the living area space and the ceiling of the living area space or the vicinity thereof;
A partial warm air discharge means for discharging a part of the warm air to the outside formed in or near the ceiling of the living space located on the uppermost floor among the living space of the building;
A building for air-conditioning the living space using natural air convection motion, comprising the outside air intake means.

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