Ventilation system

Abstract

To provide a ventilation system capable of inhibiting occurrence of dew condensation in a building.SOLUTION: A ventilation system includes: an air supply device 11 which may supply air in an indoor space S2 of a building 1 to a non-indoor space which is different from an indoor space S2 of the building 1; an exhaust device 12 capable of exhausting air in the non-indoor space; a temperature sensor 13 which is disposed at an underfloor space S1 of the building 1 and may detect a temperature of the underfloor space S1; and a control unit which controls the air supply device 11 and the exhaust device 12 based on a detection result of the temperature sensor 13.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the technology of ventilation systems.

Background Art

[0002] Conventionally, technologies for ventilating buildings (such as inter-story spaces, etc.) are well-known. For example, it is as described in Patent Document 1.

[0003] In the inter-story ventilation structure described in Patent Document 1, by rotationally driving a propeller fan provided at the exhaust port of the inter-story space, the inter-story space can be ventilated. At this time, the air in the inter-story space is discharged outdoors, and the air in the indoor space (the first-floor living room) is taken into the inter-story space. Thereby, it is possible to suppress the introduction of highly humid outside air into the inter-story space in summer and suppress the occurrence of condensation in the inter-story space in summer.

[0004] However, the air in the indoor space in winter may contain a lot of water vapor. Therefore, in the inter-story ventilation structure described in Patent Document 1, when ventilating the inter-story space in winter, the air in the highly humid indoor space may be taken into the inter-story space, and condensation may occur in the inter-story space. Also, when the air in the highly humid indoor space is taken into the inter-story space, the air may flow into the outer wall facing the inter-story space, and condensation inside the wall (condensation in the outer wall) may occur.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been made in view of the above circumstances, and the problem to be solved is to provide a ventilation system capable of suppressing the occurrence of condensation in a building.

Means for Solving the Problem

[0007] The problem to be solved by the present invention is as described above. Next, the means for solving this problem will be described.

[0008] That is, in claim 1, an air supply device capable of supplying the air in the indoor space of the building to a non-indoor space, which is a space different from the indoor space within the building, an exhaust device capable of discharging the air in the non-indoor space, a detection device disposed in the under-floor space of the building and capable of detecting at least one of the temperature or humidity of the under-floor space, and a control unit for controlling the air supply device and the exhaust device based on the detection result of the detection device are provided.

[0009] In claim 2, the control unit determines whether it is winter or summer based on the detection result of the detection device. When the determination result is winter, a first control is executed in which outside air is introduced into the non-indoor space that has become a negative pressure by operating the exhaust device. When the determination result is summer, a second control is executed in which the air in the non-indoor space that has become a positive pressure by operating the air supply device is discharged to the outside of the non-indoor space.

[0010] In claim 3, at least two or more of the non-indoor spaces are formed in the building. The exhaust device is configured to discharge the air in one of the at least two or more non-indoor spaces. In the first control, the air in another space different from the one space among the at least two or more non-indoor spaces is discharged through the one space.

[0011] In claim 4, at least two or more of the non-indoor spaces are formed in the building. The air supply device is configured to supply the air in the indoor space to one of the at least two or more non-indoor spaces. In the second control, the air in the indoor space is supplied to another space different from the one space among the at least two or more non-indoor spaces through the one space.

[0012] In claim 5, the at least two or more non-indoor spaces include the under-floor space and the inter-floor space, one of the spaces is the inter-floor space, and the other space is the under-floor space.

[0013] As an effect of the present invention, the following effects are achieved.

[0014] In claim 1, since the air supply device and the exhaust device can be appropriately controlled according to the temperature etc. of the under-floor space, the occurrence of condensation in the building can be suppressed.

[0015] In claim 2, the occurrence of condensation in the non-indoor space can be effectively suppressed.

[0016] In claim 3, when ventilating one space with the exhaust device, the other space can also be ventilated.

[0017] In claim 4, when ventilating one space with the air supply device, the other space can also be ventilated.

[0018] In claim 5, when ventilating the inter-floor space, the under-floor space can also be ventilated.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0020] Hereinafter, with reference to FIG. 1, the configuration of the building 1 in which the ventilation system 10 according to an embodiment of the present invention is provided will be described. The ventilation system 10 ventilates the building 1. Further, the ventilation system 10 of the present embodiment ventilates the inter - floor space S3 formed between each floor of the building 1. Further, as will be described later, the ventilation system 10 can also ventilate the under - floor space S1 when ventilating the inter - floor space S3. Therefore, hereinafter, the configuration of the portion of the building 1 related to the under - floor space S1 and the inter - floor space S3 will be described.

[0021] The building 1 is a detached house with multiple floors. The building 1 includes a foundation 2, an outer wall 3, a first - floor floor portion 4, a first - floor ceiling portion 5, a second - floor floor portion 6, and the like.

[0022] The foundation 2 is for transmitting the self - weight of the building 1 to the ground G and fixing the building 1 to the ground G. A plurality of under - floor ventilation openings 2a that communicate the under - floor space S1 and the outdoor space S4 are formed in the foundation 2. A base (not shown) is fixed to the upper end portion of the foundation 2. The outer wall 3 is a member that forms the outer wall of the building 1. The outer wall 3 is fixed to a base or the like.

[0023] The first - floor floor portion 4 is a member that forms the floor of the first - floor portion of the building 1. The first - floor floor portion 4 is composed of plywood or the like and is fixed to the base. An under - floor heat insulating material 4a is provided below the first - floor floor portion 4. The first - floor ceiling portion 5 is a portion that forms the ceiling of the first - floor portion. The first - floor ceiling portion 5 is composed of a ceiling facing material or the like and is provided above the first - floor floor portion 4. Further, a duct space 7 for guiding various pipes is provided between the first - floor floor portion 4 and the first - floor ceiling portion 5. The second - floor floor portion 6 is a member that forms the floor of the second - floor portion of the building 1. The second - floor floor portion 6 is composed of plywood or the like and is provided above the first - floor ceiling portion 5.

[0024] Inside the building 1, an under - floor space S1, an indoor space S2, an inter - floor space S3, and the like are formed. The under - floor space S1 is a space formed under the floor of the building 1. The under - floor space S1 of the present embodiment is a space surrounded by the foundation 2 and the first - floor floor portion 4. The under - floor space S1 is ventilated by the flow of outside air through the under - floor ventilation openings 2a of the foundation 2.

[0025] The indoor space S2 is a space formed on the floor of the building 1. Also, the indoor space S2 is a space that is routinely used by the users (such as residents, etc.) of the building 1. The indoor space S includes the space inside the rooms such as the living room and bedroom, and the space outside the rooms (such as corridors and stairs). In FIG. 1, as an example of the indoor space S2, the space inside the room on the first floor is described. The space inside the room on the first floor is a space surrounded by the outer wall 3, the first floor floor part 4, the first floor ceiling part 5, and a partition wall (not shown). Hereinafter, unless otherwise specified, the indoor space S2 shall refer to the space inside the room on the first floor. An air conditioner A is provided in the indoor space S2.

[0026] The inter - floor space S3 is a space formed between each floor of the building 1. More specifically, the inter - floor space S3 is a space between the ceiling part of the lower floor and the floor part of the upper floor. In FIG. 1, as an example of the inter - floor space S3, the inter - floor space between the first floor and the second floor is described. The inter - floor space between the first floor and the second floor is a space surrounded by the outer wall 3, the first floor ceiling part 5, and the second floor floor part 6. Hereinafter, unless otherwise specified, the inter - floor space S3 shall refer to the inter - floor space between the first floor and the second floor.

[0027] The inter - floor space S3 communicates with the under - floor space S1 via the duct space 7. Therefore, air can flow between the inter - floor space S3 and the under - floor space S1 without passing through the indoor space S2. Note that the inter - floor space S3 may communicate with the under - floor space S1 via a part different from the duct space 7. For example, the inter - floor space S3 may communicate with the under - floor space S1 via a pipe whose lower end is arranged in the under - floor space S1 and whose upper end is arranged in the inter - floor space S3.

[0028] Hereinafter, the ventilation system 10 will be described.

[0029] As shown in FIGS. 1 and 2, the ventilation system 10 includes an air supply device 11, an exhaust device 12, a temperature sensor 13, and a control unit 14.

[0030] The air supply device 11 is for supplying the air in the indoor space S2 to the space to be ventilated by the ventilation system 10 (the intermediate floor space S3 in this embodiment). The air supply device 11 of this embodiment is provided on the ceiling portion 5 of the first floor. The air supply device 11 has a fan. The air supply device 11 can suck the air in the indoor space S2 by the operation of the fan and send out the air to the intermediate floor space S3.

[0031] The exhaust device 12 is for exhausting the air in the space to be ventilated by the ventilation system 10 (the intermediate floor space S3 in this embodiment). The exhaust device 12 of this embodiment is provided at a portion of the outer wall 3 facing the intermediate floor space S3. The exhaust device 12 has a fan. The exhaust device 12 can suck the air in the intermediate floor space S3 by the operation of the fan and send out the air to the outdoor space S4.

[0032] The temperature sensor 13 is for detecting the temperature of the underfloor space S1. The temperature sensor 13 is arranged in the underfloor space S1. A non-waterproof temperature sensor without a waterproof function is used for the temperature sensor 13. As will be described later, in this embodiment, the air supply device 11 and the exhaust device 12 are controlled according to the detection result of the temperature sensor 13. In FIG. 1, for convenience of explanation, the temperature sensor 13 and the air supply device 11 etc. are directly connected, but actually the temperature sensor 13 is connected to the air supply device 11 etc. via the control unit 14 (see FIG. 2).

[0033] The control unit 14 shown in FIG. 2 controls various components of the ventilation system 10. The control unit 14 includes a storage unit such as a RAM, a ROM, an HDD, and an arithmetic processing unit such as a CPU. Various information and programs etc. for controlling various components of the ventilation system 10 are stored in the control unit 14.

[0034] The control unit 14 is connected to the air supply device 11, the exhaust device 12, and the temperature sensor 13. The control unit 14 can control the air supply device 11 and the exhaust device 12 by outputting signals to the air supply device 11 and the exhaust device 12. For example, the control unit 14 can operate or stop the air supply device 11 and the exhaust device 12 (the fan).

[0035] A signal is input from the temperature sensor 13 to the control unit 14. The control unit 14 can obtain the detection result of the temperature in the underfloor space S1 based on the signal. Further, the control unit 14 can control the air supply device 11 and the exhaust device 12 based on the detection result.

[0036] Hereinafter, with reference to FIGS. 3 and 4, the control contents of the air supply device 11 and the like by the control unit 14 will be described. Note that FIG. 3 is a process for controlling the air supply device 11 and the like (hereinafter referred to as "air supply and exhaust control process"). The control unit 14 repeatedly executes the air supply and exhaust control process. When starting the air supply and exhaust control process, the control unit 14 shifts to step S10.

[0037] In step S10, the control unit 14 obtains the temperature of the underfloor space S1 based on the signal from the temperature sensor 13. When the process of step S10 ends, the control unit 14 shifts to step S20.

[0038] In step S20, when the detection result of the temperature of the underfloor space S1 obtained in step S10 is less than 15°C (step S20: YES), the control unit 14 shifts to step S30. On the other hand, when the detection result is 15°C or more (step S20: NO), the control unit 14 shifts to step S40. As will be described later, since the temperature of the underfloor space S1 is considered to be correlated with the outside air temperature, the control unit 14 shifts to step S30 in winter when the outside air temperature is low, and shifts to step S40 in summer when the outside air temperature is high.

[0039] Here, winter is the month with a low average monthly temperature in a year. For example, winter is December, January, and February. Winter is also the time when the indoor space S2 is likely to be humidified by a humidifier or the like because the indoor space S2 is likely to be dry. Summer is the month with a high average monthly temperature in a year. For example, summer is June, July, and August. Summer is also the time when the outside air is highly humid.

[0040] The threshold value used in step S20 only needs to be set so that the control unit 14 shifts to step S30 during the period when the indoor space S2 is likely to be humidified, and the control unit 14 shifts to step S40 during the period when the outside air is highly humid, and it is not limited to this embodiment (15°C). For example, the threshold value may be arbitrarily set within the range of 15°C to 20°C.

[0041] In step S30, the control unit 14 stops the air supply device 11 and operates the exhaust device 12. As a result, as shown in FIG. 4(a), the air in the intermediate space S3 is discharged to the outdoor space S4, and the intermediate space S3 becomes negative pressure (negative pressure). In this embodiment, since the intermediate space S3 communicates with the underfloor space S1, outside air is introduced into the intermediate space S3 through the underfloor space S1 (underfloor ventilation opening 2a). In this way, when the process of step S30 is executed, the intermediate space S3 is ventilated by the third type of ventilation by the exhaust device 12. As shown in FIG. 3, when the process of step S30 ends, the control unit 14 ends the air supply and exhaust control process.

[0042] In step S40, the control unit 14 operates the air supply device 11 and stops the exhaust device 12. As a result, as shown in FIG. 4(b), the air in the indoor space S2 is supplied to the intermediate space S3, and the intermediate space S3 becomes positive pressure (positive pressure). In this embodiment, since the intermediate space S3 communicates with the underfloor space S1, the air in the intermediate space S3 is discharged to the outdoor space S4 through the underfloor space S1 (underfloor ventilation opening 2a). In this way, when the process of step S40 is executed, the intermediate space S3 is ventilated by the second type of ventilation by the air supply device 11. Since the intermediate space S3 becomes positive pressure in step S40, it is difficult for outside air to be taken into the intermediate space S3. Also, air is introduced into the indoor space S2 from spaces other than the intermediate space S3 (for example, the outdoor space S4). As shown in FIG. 3, when the process of step S40 ends, the control unit 14 ends the air supply and exhaust control process.

[0043] By executing the supply and exhaust control process, the control unit 14 can switch between ventilation by the exhaust device 12 (see Fig. 4(a)) and ventilation by the supply device 11 (see Fig. 4(b)) according to the detection result of the temperature in the underfloor space S1. Since the temperature in the underfloor space S1 of the present embodiment is considered to be correlated with the outside air temperature, the control unit 14 can ventilate the intermediate space S3 with the exhaust device 12 in winter when the outside air temperature is low, and ventilate the intermediate space S3 with the supply device 11 in summer when the outside air temperature is high. Hereinafter, the relationship between the temperature in the underfloor space S1 and the outside air temperature will be described.

[0044] As described above, since the underfloor heat insulating material 4a is provided on the first floor 4, even if the temperature of the indoor space S2 is adjusted by the air conditioner A or the like, the temperature of the underfloor space S1 is unlikely to change. In addition, the foundation 2 is not provided with a foundation heat insulating material, and the temperature of the underfloor space S1 is relatively easily affected by the outside air temperature. Also, the outside air can flow through the underfloor ventilation opening 2a into the underfloor space S1. Therefore, it is considered that when the outside air temperature rises, the temperature of the underfloor space S1 also rises, and when the outside air temperature drops, the temperature of the underfloor space S1 also drops (there is a correlation).

[0045] The graph in Fig. 5 shows an example of the results of measuring the temperature of the underfloor space (with the underfloor heat insulating material 4a and the underfloor ventilation opening 2a provided) having the same specifications as the present embodiment and the outside air temperature. For example, in the period from May 30th to July 29th shown in Fig. 5, the measurement result of the outside air temperature is gradually rising. During this period, the measurement result of the temperature of the underfloor space is also gradually rising. Also, for example, in the period around March 31st shown in Fig. 5, the measurement result of the outside air temperature is temporarily decreasing. During this period, the measurement result of the temperature of the underfloor space is also temporarily decreasing.

[0046] As is clear from the measurement results in Fig. 5, the temperature of the underfloor space S1 is considered to be correlated with the outside air temperature. Therefore, in the present embodiment, instead of detecting the temperature (outside air temperature) in the outdoor space S4 that may get wet due to rain or the like, the temperature is detected in the underfloor space S1, and the ventilation method is switched using an inexpensive temperature sensor 13 without a waterproof function. Thereby, cost reduction can be achieved. Also, the intermediate space S3 can be appropriately ventilated according to winter and summer.

[0047] Specifically, as described above, in winter, the indoor space S2 is likely to be humidified by a humidifier or the like, so the air in the indoor space S2 in winter may contain a large amount of water vapor. Therefore, as shown in Fig. 4(a), in winter, the control unit 14 ventilates the inter-floor space S3 by the exhaust device 12 (step S20: YES, step S30). As a result, the control unit 14 can suppress the introduction of the high-humidity air in the indoor space S2 into the inter-floor space S3 in winter, so that the occurrence of condensation in the inter-floor space S3 can be suppressed. In addition, it is possible to suppress the inflow of the air in the high-humidity indoor space S2 into the outer wall 3 facing the inter-floor space S3 and the occurrence of condensation in the wall body (condensation in the outer wall 3).

[0048] Also, as shown in Fig. 4(b), in summer, the control unit 14 ventilates the inter-floor space S3 by the air supply device 11 (step S20: NO, step S40). As a result, the control unit 14 can make the inter-floor space S3 under positive pressure and suppress the introduction of the high-humidity outside air in summer into the inter-floor space S3. Thereby, even if the first-floor ceiling part 5 is cooled by the cooling operation of the air conditioner A, it is possible to suppress the occurrence of condensation around the first-floor ceiling part 5 of the inter-floor space S3.

[0049] In addition, in this embodiment, since the inter-floor space S3 and the under-floor space S1 communicate with each other, the under-floor space S1 is also ventilated along with the ventilation of the inter-floor space S3.

[0050] For example, as shown in Fig. 4(a), in winter, the under-floor space S1 is ventilated by discharging the air in the under-floor space S1 to the outdoor space S4 through the inter-floor space S3. As a result, in winter, it is possible to suppress the introduction of the high-humidity air in the indoor space S2 into the under-floor space S1 and suppress the occurrence of condensation in the under-floor space S1. Also, for example, as shown in Fig. 4(b), in summer, the under-floor space S1 is ventilated by introducing the air in the indoor space S2 into the under-floor space S1 through the inter-floor space S3. Thereby, it is possible to suppress the introduction of the high-humidity outside air in summer into the under-floor space S1 and suppress the occurrence of condensation in the under-floor space S1.

[0051] In this embodiment, the configuration of the ventilation system 10 has been described by taking, as an example, the ventilation system 10 that mainly ventilates the space between the first floor and the second floor. However, the space to be ventilated by the ventilation system 10 is not limited to the space between the first floor and the second floor as long as it is a space different from the indoor space S2 (a non-indoor space that users do not use daily). The ventilation system 10 can also ventilate, for example, the space between the second floor and the third floor, the attic space between the ceiling of the top floor and the roof, and the like.

[0052] As described above, the ventilation system 10 according to this embodiment includes an air supply device 11 capable of supplying the air in the indoor space S2 of the building 1 to a non-indoor space (the underfloor space S1 and the inter-floor space S3), which is a space different from the indoor space S2, within the building 1, an exhaust device 12 capable of exhausting the air in the non-indoor space, a detection device disposed in the underfloor space S1 of the building 1 and capable of detecting at least one of the temperature or humidity of the underfloor space S1, and a control unit 14 that controls the air supply device 11 and the exhaust device 12 based on the detection result of the detection device. In this embodiment, a temperature sensor 13 for detecting the temperature of the underfloor space S1 is described as an example of the detection device.

[0053] By configuring in this way, it is possible to suppress the occurrence of condensation in the building 1 (such as the inter-floor space S3). Also, for example, since the air supply device 11 and the exhaust device 12 can be controlled using a temperature sensor 13 or the like that does not have a waterproof function, cost reduction can be achieved.

[0054] Further, the control unit 14 determines whether it is winter or summer based on the detection result of the detection device (step S20). When the determination result is winter, the first control (see FIG. 4(a)) in which outside air is introduced into the non-indoor space (such as the inter-floor space S3) that has become a negative pressure by operating the exhaust device 12 is executed (step S20: YES, step S30). When the determination result is summer, the second control (see FIG. 4(b)) in which the air in the non-indoor space that has become a positive pressure is discharged to the outside of the non-indoor space by operating the air supply device 11 is executed (step S20: NO, step S40).

[0055] By configuring in this way, it is possible to switch the ventilation methods (the first control and the second control) in winter and summer, and suppress the introduction of high-humidity air into the inter-floor space S3 or the like in each of winter and summer. Thereby, the occurrence of condensation in the inter-floor space S3 or the like can be effectively suppressed. Also, for example, the first control and the second control can be executed without using a calendar function, and cost reduction can be achieved.

[0056] In addition, at least two or more of the non-indoor spaces (such as the under-floor space S1, the inter-floor space S3, the attic space, etc.) are formed in the building. The exhaust device 12 is configured to discharge the air in one of the at least two or more non-indoor spaces (the inter-floor space S3). In the first control, the air in another space (the under-floor space S1) different from the one space among the at least two or more non-indoor spaces is discharged through the one space (see FIG. 4(a)).

[0057] By configuring in this way, when ventilating one space with the exhaust device 12, other spaces can also be ventilated.

[0058] In addition, at least two or more of the non-indoor spaces (such as the under-floor space S1, the space between floors S3, the space under the shed, etc.) are formed in the building, and the air supply device 11 is configured to supply the air in the indoor space S2 to one of the at least two or more non-indoor spaces (the space between floors S3). In the second control, the air in the indoor space S2 is supplied to another space (the under-floor space S1) different from the one space among the at least two or more non-indoor spaces through the one space (see Fig. 4(b)).

[0059] By configuring in this way, when ventilating one space with the air supply device 11, other spaces can also be ventilated.

[0060] In addition, the under-floor space S1 and the space between floors S3 are included in the at least two or more non-indoor spaces, the one space is the space between floors S3, and the other space is the under-floor space S1.

[0061] By configuring in this way, when ventilating the space between floors S3, the under-floor space S1 can also be ventilated.

[0062] Note that the under-floor space S1 and the space between floors S3 according to this embodiment are one form of implementation of the non-indoor space according to the present invention. In addition, the temperature sensor 13 according to this embodiment is one form of implementation of the detection device according to the present invention. In addition, the space between floors S3 according to this embodiment is one form of implementation of one space according to the present invention. In addition, the under-floor space S1 according to this embodiment is one form of implementation of another space according to the present invention.

[0063] As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0064] For example, although the ventilation system 10 is provided in a detached house, the building in which the ventilation system 10 is provided is not limited to a detached house as long as it is a building in which a subfloor space S1 and an indoor space S2 are formed. For example, the ventilation system 10 may be provided in an apartment house.

[0065] Also, in the present embodiment, the air in the indoor space on the first floor is supplied to the space between the first and second floors, but the air supply device 11 can also supply the air in the indoor space on another floor (for example, the second floor) to the space between the floors. Also, although the air supply device 11 is provided in the ceiling portion 5 of the first floor (the space between the floors S3), the installation location of the air supply device 11 is not limited to the present embodiment. For example, the air supply device 11 may be provided in the floor portion 4 of the first floor (the subfloor space S1).

[0066] Also, the air supply device 11 only needs to be able to introduce the air in the indoor space S2 into the space to be ventilated (such as the space between the floors S3), and the specific configuration is not limited to the present embodiment. For example, the air supply device 11 may include a fan, a case covering the fan, and an opening / closing mechanism (such as a louver) for opening and closing the opening of the case. The opening / closing mechanism may open the opening during the operation of the air supply device 11 and close the opening when the air supply device 11 stops. Thereby, when the exhaust device 12 operates in winter (when the air supply device 11 stops), it is possible to effectively suppress the introduction of the high-humidity air in the indoor space S2 into the space between the floors S3 or the like.

[0067] Also, the exhaust device 12 only needs to be able to discharge the air in the space to be ventilated (such as the space between the floors S3), and the specific configuration is not limited to the present embodiment. For example, although the exhaust device 12 is provided on the outer wall 3 (the space between the floors S3), the installation location of the exhaust device 12 is not limited to the present embodiment. For example, the exhaust device 12 may be provided on the foundation 2 (the subfloor space S1).

[0068] Also, although the intermediate space S3 is configured to communicate with the underfloor space S1, the configuration of the intermediate space S3 is not limited to this, and for example, it may not communicate with the underfloor space S1. In this case, when the air supply device 11 operates, the air in the intermediate space S3 is discharged to the outdoor space S4 without passing through the underfloor space S1. For example, the air in the intermediate space S3 may be discharged to the outdoor space S4 through a ventilation opening formed in a portion of the outer wall 3 that faces the intermediate space S3.

[0069] Also, although the temperature sensor 13 is configured to detect the temperature of the underfloor space S1 where the underfloor ventilation opening 2a and the underfloor heat insulating material 4a are provided, it is also possible to detect the temperature of an underfloor space having a configuration different from that of the present embodiment. For example, the temperature sensor 13 can also detect the temperature of an underfloor space where the underfloor ventilation opening 2a or the underfloor heat insulating material 4a is not provided.

[0070] Also, although the control unit 14 is configured to control the air supply device 11 and the like according to the temperature of the underfloor space S1, since the humidity of the underfloor space S1 differs between winter and summer (higher in summer than in winter), it is also possible to control the air supply device 11 and the like according to the humidity of the underfloor space S1. For example, when the detection result of the humidity of the underfloor space S1 is less than a predetermined threshold value, the control unit 14 can ventilate the intermediate space S3 with the exhaust device 12, and when the detection result is equal to or greater than the predetermined threshold value, the control unit 14 can ventilate the intermediate space S3 with the air supply device 11. Also, the control unit 14 can control the air supply device 11 and the like according to both the temperature and the humidity.

[0071] Also, although the control unit 14 is configured to stop the exhaust device 12 when operating the air supply device 11 (in summer) (see Fig. 4(b)), the control of the exhaust device 12 when operating the air supply device 11 is not particularly limited. For example, the control unit 14 may operate the exhaust device 12 when operating the air supply device 11. When the control unit 14 operates the exhaust device 12, it is desirable to control the air supply device 11 and the exhaust device 12 so that the high-humidity outside air in summer is not introduced into the intermediate space S3 (so that the intermediate space S3 becomes positively pressurized). For example, it is desirable for the control unit 14 to control the air supply device 11 and the like so that the air volume of the air supply device 11 is larger than the air volume of the exhaust device 12.

Description of Symbols

[0072] 1 Building 10 Ventilation System 11 Air Supply Device 12 Exhaust Device 13 Temperature Sensor 14 Control Unit S1 Underfloor Space S2 Indoor Space S3 Inter - floor Space

Claims

1. An air supply device capable of supplying air in the indoor space of a building to a non-indoor space, which is a space different from the indoor space, within the building, An exhaust device capable of exhausting air in the non-indoor space, A detection device arranged in the underfloor space of the building and capable of detecting at least one of the temperature or humidity of the underfloor space, A control unit for controlling the air supply device and the exhaust device based on the detection result of the detection device, Comprising: A ventilation system.

2. The control unit: Determines whether it is winter or summer based on the detection result of the detection device, When the determination result is winter, executes a first control in which outside air is introduced into the non-indoor space that has become a negative pressure by operating the exhaust device, When the determination result is summer, executes a second control in which the air in the non-indoor space that has become a positive pressure by operating the air supply device is discharged to the outside of the non-indoor space. The ventilation system according to Claim 1.

3. In the building, At least two or more of the non-indoor spaces are formed, The exhaust device: Is configured to exhaust air in one of the at least two or more non-indoor spaces, In the first control, air in another space different from the one space among the at least two or more non-indoor spaces is exhausted through the one space. The ventilation system according to Claim 2.

4. In the building, At least two or more of the non-indoor spaces are formed, The air supply device: Is configured to supply air in the indoor space to one of the at least two or more non-indoor spaces, In the second control, air in the indoor space is supplied to another space different from the one space among the at least two or more non-indoor spaces through the one space. The ventilation system according to Claim 2 or Claim 3.

5. In the at least two or more non-indoor spaces, The underfloor space and the space between floors are included, The one space: Is the space between floors, The other space: Is the underfloor space. The ventilation system according to Claim 4.

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