Ventilation system

Abstract

To ventilate the inside of a building in an energy-saving manner according to a condition of each room in the building.SOLUTION: A ventilation system 10 controls the ventilation of a building that comprises a field R1 and rooms R2-1, R2-2, R2-3 that are smaller spaces than field R1. The ventilation system 10 cascade-ventilates the return air after supplying air to field R1 into rooms R2-1, R2-2, and R2-3. The ventilation system 10 also ventilates air in rooms R2-1, R2-2, and R2-3 individually. A ventilation control device 14 of the ventilation system 10 switches between cascade ventilation and individual ventilation depending on information related to a utilization situation of the field R1.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a ventilation system.

Background Art

[0002] Patent Document 1 discloses a configuration related to cascade ventilation. Specifically, Patent Document 1 discloses that outside air is introduced into the living room 1 of the primary area A1 through the total heat exchanger 6, and exhausted from the living room to the outside through the total heat exchanger. And in Patent Document 1, an exhaust fan EF2 is provided in the secondary area A2, and the air in the secondary area is exhausted to the outside, and accordingly, a part of the air in the primary area is sucked into the secondary area.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when an event is held in a large space such as an arena or a multi-purpose indoor stadium, it is necessary to ventilate the building, and a large amount of energy is consumed for the ventilation.

[0005] When a large space such as an arena or a multi-purpose indoor stadium is used by a small number of people, the amount of outside air introduced (ventilation volume) is often a small amount commensurate with the number of people. However, due to the specifications and equipment capacity of the air conditioning equipment and ventilation equipment, etc., the amount of outside air introduced (ventilation volume) by the fan cannot be throttled and is excessive. Therefore, wasteful energy consumption occurs.

[0006] Therefore, in a building such as an arena or a multi-purpose indoor stadium, cascade ventilation as disclosed in Patent Document 1 can be adopted. In Patent Document 1, as described above, the supply of fresh air to the secondary area is made from the outside through a total heat exchanger and the primary area, and it is premised on always performing cascade ventilation.

[0007] However, there may be cases where it is not appropriate to perform cascade ventilation. Since the technology disclosed in Patent Document 1 is premised on always performing cascade ventilation, there is a problem that cascade ventilation is performed even when it is not appropriate to do so.

[0008] The present invention has been made in view of the above facts, and an object thereof is to ventilate the inside of a building in an energy-saving manner in consideration of the situation of rooms in the building.

Means for Solving the Problems

[0009] A first aspect of the present invention is a ventilation system for controlling ventilation of a building including a first room and a second room that is a space smaller than the first room, the ventilation system including: a first ventilation means for performing cascade ventilation of the return air after supplying air to the first room to the second room; a second ventilation means for individually ventilating the air in the second room; and a control means for controlling ventilation, wherein the control means switches between cascade ventilation by the first ventilation means and individual ventilation by the second ventilation means according to information regarding the usage situation of the first room. Thereby, it is possible to ventilate the inside of the building in an energy-saving manner in consideration of the situation of rooms in the building.

[0010] Further, the information regarding the usage status of the first chamber according to the second aspect of the present invention is information regarding an event held in the first chamber, and when an event is being held in the first chamber and the event is of a preset type, the control means controls to execute individual ventilation by the second ventilation means. When an event is being held in the first chamber and the event is different from the preset type of event, the control means controls to execute cascade ventilation by the first ventilation means. When it is a time period before and after an event is held in the first chamber, the control means controls to execute cascade ventilation by the first ventilation means. Thereby, it is possible to ventilate the building in an energy-saving manner according to whether an event is being held in the first chamber and the type of the held event.

[0011] Further, the information regarding the usage status of the first chamber according to the third aspect of the present invention is information regarding the carbon dioxide concentration in the air discharged from the first chamber, and when the carbon dioxide concentration in the air discharged from the first chamber is equal to or higher than a threshold value, the control means controls to execute individual ventilation by the second ventilation means. Thereby, when the air discharged from the first chamber is not suitable for cascade ventilation, individual ventilation can be executed for the second chamber.

[0012] Further, the control means according to the fourth aspect of the present invention controls to execute individual ventilation by the second ventilation means when the carbon dioxide concentration in the second chamber is equal to or higher than a threshold value. Thereby, when the state of the second chamber is not suitable for cascade ventilation, individual ventilation can be executed for the second chamber.

Effects of the Invention

[0013] According to the present invention, there is an effect that the building can be ventilated in an energy-saving manner in consideration of the situation of the chambers in the building.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0016] FIG. 1 is a diagram showing an example of a building in which the ventilation system of the present embodiment is installed. The building of the present embodiment is a building having a large space such as an arena or a multi-purpose indoor arena, for example, a dome-shaped indoor arena as shown in FIG. 1. FIG. 1 is a view of the dome-shaped indoor arena from above inside.

[0017] The dome-shaped indoor arena shown in FIG. 1 includes a field R1 which is a large space room, a spectator seat, a restaurant or a store R2-1, a conference room R2-2, various operation-related rooms R2-3, a concourse R3, and a machine room (see FIG. 2).

[0018] FIG. 2 is a diagram showing the ventilation system 10 of the embodiment. As shown in FIG. 2, the ventilation system 10 includes an air conditioner 12 having a blower for supply air and the like as described later, a ventilation control device 14, a plurality of blowers 16A, 16B, 16C, a plurality of CO2 sensors 20A, 20B, 20C, 20D for detecting the carbon dioxide concentration, and a plurality of dampers D1, D2, D3, D4, D5, D6, D7, D8 for controlling the air flow rate.

[0019] Also, as shown in Fig. 2, the building is provided with a plurality of galleries 18A, 18B, 18C, 18D leading to the outside, air supply ports 22A, 22B, 22C, 22D, 22E, 23E provided in each room, air intake ports 24A, 24B, 24C, 24D, 24E provided in each room, an exhaust port 25E provided in the concourse R3, and a duct Du through which air flows.

[0020] The field R1 shown in Figs. 1 and 2 is a large - space room and is an example of the first room of the present invention. Also, the room R2 - 1 (hereinafter simply referred to as the store room R2 - 1) containing a restaurant or a store, the conference room R2 - 2, and the operation - related rooms R2 - 3 shown in Figs. 1 and 2 are rooms having a smaller space than the field R1 and are examples of the second room of the present invention. Note that the field R1 corresponds to the primary area, the store room R2 - 1, the conference room R2 - 2, and the operation - related rooms R2 - 3 correspond to the secondary area, and the concourse R3 corresponds to the tertiary area.

[0021] Although the illustration of the internal configuration of the air conditioner 12 is omitted, it includes a blower for air supply and a coil (temperature control unit) connected to a heat source by a circulation path through which chilled and hot water circulates and is supplied. The air conditioner 12 takes in outside air from the gallery 18A, heats or cools the outside air, and supplies the air with adjusted temperature from the air supply port 22A to the field R1. Also, the air conditioner 12 includes a blower for return air (a blower for exhaust) (not shown), and supplies the return air of the field R1 taken in from the air intake port 24A of the field R1 to the air supply ports 22B of the store room R2 - 1, 22C of the conference room R2 - 2, 22D of the operation - related rooms R2 - 3, and 22E of the concourse R3, thereby performing cascade ventilation. The air conditioner 12 is an example of the first ventilation means of the present invention.

[0022] Also, the blowers 16A and 16B individually ventilate the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3. The blower 16C individually ventilates the concourse R3. Specifically, the blower 16A takes in outside air from the gallery 18C and supplies the outside air to the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3 from the air supply ports 22B, 22C, and 22D. Also, the blower 16B exhausts the air in the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3, which is sucked in from the intake ports 24B, 24C, and 24D, to the air supply port 23E of the gallery 18D or the concourse R3. Further, the concourse R3 is individually ventilated by an air supply means (not shown) that supplies outside air to the concourse R3 without passing through the living rooms and the blower 16C. The blowers 16A, 16B, and 16C are an example of the second ventilation means of the present invention.

[0023] The ventilation control device 14 switches between cascade ventilation and individual ventilation according to the information on the usage status of the field R1. Note that the ventilation control device 14 is an example of the control means of the present invention. The information on the usage status of the field R1 is, for example, information on the event held in the field R1. Specifically, it is the type of the event held in the field R1 and the time zone during which the event is held.

[0024] When an event is being held in the venue R1 and the event is of a preset type, the ventilation control device 14 controls to execute individual ventilation by the blowers 16A and 16B. Also, when an event is being held in the venue R1 and the event is different from the preset type of event, the ventilation control device 14 controls to execute cascade ventilation by the air conditioner 12. For example, when the event held in the venue R1 is an event where odors are generated such as a product exhibition, if the return air in the venue R1 is supplied to the store room R2-1, the conference room R2-2, the various operation-related rooms R2-3, and the concourse R3, the odor will also be transmitted to the store room R2-1, the conference room R2-2, the various operation-related rooms R2-3, and the concourse R3, which is not preferable. Also, when a sports game, a concert, etc. are being held in the venue R1, there may be cases where it is not preferable.

[0025] Therefore, when the event being held is of a preset type of event, the ventilation control device 14 controls to execute individual ventilation of the store room R2-1, the conference room R2-2, the various operation-related rooms R2-3, and the concourse R3 by the blowers 16A and 16B. Also, when the event being held is different from the preset type of event, the ventilation control device 14 controls to execute cascade ventilation by the air conditioner 12.

[0026] On the other hand, when it is a time period before and after an event is held in the venue R1, the ventilation control device 14 controls to execute cascade ventilation by the air conditioner 12. For example, during time periods such as event preparation, cleanup, and practice for a sports game, the ventilation control device 14 controls the air conditioner 12 to execute cascade ventilation.

[0027] Also, the information regarding the usage status of the venue R1 is, for example, information regarding the carbon dioxide concentration in the air discharged from the venue R1.

[0028] When the carbon dioxide concentration in the air discharged from the field R1 is equal to or higher than a threshold value (for example, 500 ppm), the ventilation control device 14 controls to execute individual ventilation by the blowers 16A and 16B for the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3. Further, when the carbon dioxide concentration in the air discharged from the field R1 is equal to or higher than the threshold value, the ventilation control device 14 controls to execute individual ventilation by the blower 16C for the concourse R3. When the carbon dioxide concentration in the air discharged from the field R1 is high, it is not preferable to supply the return air to the store room R2-1, the conference room R2-2, the various operation-related rooms R2-3, and the concourse R3. Therefore, when the carbon dioxide concentration in the air discharged from the field R1 detected by the CO2 sensor 20A is equal to or higher than the threshold value, the ventilation control device 14 controls to execute individual ventilation by the blowers 16A, 16B, and 16C.

[0029] On the other hand, when the carbon dioxide concentration in the air discharged from the field R1 detected by the CO2 sensor 20A is less than the threshold value, the ventilation control device 14 controls to execute cascade ventilation by the air conditioner 12.

[0030] Note that the ventilation control device 14 acquires in advance information on the usage status of the field R1 (for example, the type of event and the time zone in which the event is being held, etc.) from an external device (not shown), and uses this information to switch between individual ventilation and cascade ventilation.

[0031] Furthermore, when the carbon dioxide concentration in the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3 is equal to or higher than a threshold value (for example, 800 ppm), the ventilation control device 14 controls to execute individual ventilation by the blowers 16A and 16B. This is because when cascade ventilation is executed when the carbon dioxide concentration in the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3 is equal to or higher than the threshold value, the carbon dioxide concentration in the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3 may increase, which is not preferable.

[0032] In order to execute the control as described above, when the ventilation control device 14 executes cascade ventilation, for example, it controls to close dampers D1 and D8 and controls to open dampers D2, D3, D4, D5, D6, and D7, so as to supply the return air from field R1 to store room R2-1, conference room R2-2, various operation-related rooms R2-3, and concourse R3, and execute cascade ventilation.

[0033] On the other hand, when the ventilation control device 14 executes individual ventilation, for example, it controls to close dampers D2, D3, and D7 and controls to open dampers D1, D4, D5, D6, and D8, so as to control that the return air from field R1 is not supplied to store room R2-1, conference room R2-2, various operation-related rooms R2-3, and concourse R3, and execute individual ventilation.

[0034] In this way, by switching between cascade ventilation and individual ventilation according to the situation of each room in the building, it becomes possible to ventilate the building in an energy-saving manner. Specifically, by supplying the return air from field R1 heated or cooled by air conditioner 12 to store room R2-1, conference room R2-2, various operation-related rooms R2-3, and concourse R3, it becomes possible to realize energy-saving ventilation. On the other hand, by switching between cascade ventilation and individual ventilation according to the type of event being held, whether the event is in progress, and the carbon dioxide concentration, compared with the case of always executing cascade ventilation, the inside of the building can be kept in an appropriate state (for example, not increasing the carbon dioxide concentration and not transmitting odors in store room R2-1, conference room R2-2, various operation-related rooms R2-3, and concourse R3).

[0035] The ventilation control device 14 can be realized by, for example, a computer 60 as shown in FIG. 3. The computer 60 that realizes the ventilation control device 14 includes a CPU 61, a memory 62 as a temporary storage area, and a non-volatile storage unit 63. Further, the computer 60 includes an input / output interface (I / F) 64 to which an input / output device etc. (not shown) is connected, and a read / write (R / W) unit 65 that controls reading and writing of data to and from a recording medium 69. Further, the computer includes a network I / F 66 connected to a network such as the Internet. The CPU 61, the memory 62, the storage unit 63, the input / output I / F 64, the R / W unit 65, and the network I / F 66 are connected to each other via a bus 67.

[0036] The storage unit 63 can be realized by a Hard Disk Drive (HDD), a Solid State Drive (SSD), a flash memory, or the like. A program for operating the computer is stored in the storage unit 63 as a storage medium. The CPU 61 reads the program from the storage unit 63 and expands it in the memory 62, and sequentially executes the processes included in the program.

[0037] <Operation of the ventilation system 10>

[0038] Next, the operation of the ventilation system 10 of the embodiment will be described.

[0039] When the ventilation control device 14 of the ventilation system 10 receives a predetermined instruction signal, it executes the ventilation control processing routine shown in FIG. 4.

[0040] In step S100, the ventilation control device 14 controls the air conditioner 12 so as to perform air conditioning and ventilation in the field R1 which is a primary area. Specifically, the ventilation control device 14 controls the air conditioner 12 by outputting a predetermined control signal to the air conditioner 12.

[0041] In step S101, the ventilation control device 14 acquires information on an event held in the field R1 from an external device (not shown). Specifically, the ventilation control device 14 acquires information on the type of event held in the field R1 and information on the time period during which the event is held.

[0042] Next, in step S102, the ventilation control device 14 acquires carbon dioxide concentration information of the field R1, which is the primary area, from the CO2 sensor 20A.

[0043] Then, in step S104, the ventilation control device 14 determines whether cascade ventilation conditions related to the primary area side are satisfied. The cascade ventilation conditions related to the primary area side are as follows.

[0044] (Cascade ventilation conditions related to the primary area side) (A) The carbon dioxide concentration in the air discharged from the primary area is less than the threshold value. (B-1) It is the time period before and after the event is held in the primary area. (B-2) It is during the event held in the primary area and is different from the preset type of event.

[0045] If (A) and (B-1) are satisfied or (A) and (B-2) are satisfied, the cascade ventilation conditions related to the field R1 side, which is the primary area, are in a satisfied state.

[0046] Therefore, in step S104, if the cascade ventilation conditions related to the field R1 side, which is the primary area, are satisfied, the process proceeds to step S106. On the other hand, if the cascade ventilation conditions related to the field R1 side, which is the primary area, are not satisfied, the process proceeds to step S112.

[0047] In step S106, the ventilation control device 14 obtains the carbon dioxide concentration information of the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3, which are secondary areas, from the CO2 sensors 20B, 20C, and 20D.

[0048] In step S108, the ventilation control device 14 determines whether the cascade ventilation conditions related to the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3, which are secondary areas, are satisfied. The cascade ventilation conditions related to the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3 on the secondary area side are as follows.

[0049] (Cascade ventilation conditions related to the secondary area side) (C) The carbon dioxide concentration of the air in the secondary area is less than the threshold value.

[0050] If (C) is satisfied, the cascade ventilation conditions related to the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3, which are secondary areas, are in a satisfied state. Note that the ventilation control device 14 executes cascade ventilation when all of the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3 satisfy the cascade ventilation conditions related to the secondary area side.

[0051] Therefore, in step S108, when the cascade ventilation conditions related to the secondary area side are satisfied, the process proceeds to step S110. On the other hand, when the cascade ventilation conditions related to the secondary area side are not satisfied, the process proceeds to step S112.

[0052] In step S110, the ventilation control device 14 controls the air conditioner 12 and each damper so as to execute cascade ventilation for the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3.

[0053] In step S112, the ventilation control device 14 controls the air conditioner 12, each blower, and each damper so as to execute individual ventilation for the store room R2-1, the conference room R2-2, and the various operation-related rooms R2-3.

[0054] As described above, the ventilation system of the embodiment is a ventilation system that controls the ventilation of a building including a first room and a second room that is a space smaller than the first room. The ventilation system includes an air conditioner that cascades the return air after supplying air to the first room to the second room, a blower that individually ventilates the air in the second room, and a ventilation control device that controls ventilation. The ventilation control device switches between cascade ventilation by the air conditioner and individual ventilation by the blower according to information regarding the usage status of the first room. Thereby, it is possible to ventilate the building in an energy-saving manner according to the situation of each room in the building.

[0055] Specifically, by switching between cascade ventilation and individual ventilation according to the type of event being held, whether the event is in progress, and the carbon dioxide concentration, it is possible to make the building in an appropriate state while ventilating the building in an energy-saving manner as compared with the case of always performing cascade ventilation.

[0056] Note that the present invention is not limited to the above-described embodiments, and various modifications and applications are possible without departing from the gist of the present invention.

[0057] For example, in the above embodiment, the case where the building is a dome-shaped indoor stadium has been described as an example, but the present invention is not limited to this. Any building may be used as long as it has a large-space room and a small-space room. Further, in the above embodiment, the case where the air conditioner 12 includes a blower for air supply or the like has been described as an example, but the present invention is not limited to this. For example, the air conditioner 12 may include a total heat exchanger.

[0058] Also, in the above embodiment, the case where cascade ventilation is executed when all the rooms on the secondary area side satisfy the cascade ventilation conditions related to the secondary area side has been described as an example, but the present invention is not limited to this. For example, it may be determined whether each room in the secondary area satisfies the cascade ventilation conditions, and cascade ventilation may be executed only for the rooms that satisfy the cascade ventilation conditions. In this case, the ducts and dampers are arranged so that such control can be executed.

[0059] In addition, in the above, the mode in which the program according to the present invention is previously stored (installed) in the storage unit has been described. However, the program according to the present invention can also be provided in a form recorded on a recording medium such as a CD-ROM, a DVD-ROM, and a micro SD card.

Explanation of reference numerals

[0060] 10 Ventilation system 12 Air conditioner 14 Ventilation control device 16A, 16B, 16C Blower 18A, 18B, 18C, 18D Gallery 20A, 20B, 20C, 20D CO2 sensor

Claims

1. A ventilation system for controlling the ventilation of a building comprising a first room and a second room which is a space smaller than the first room, a first ventilation means for cascade ventilating the return air after supplying air to the first room to the second room, a second ventilation means for individually ventilating the air in the second room, control means for controlling ventilation, comprising, the control means switches between cascade ventilation by the first ventilation means and individual ventilation by the second ventilation means according to information regarding the usage status of the first room, ventilation system.

2. The information regarding the usage status of the first room is information regarding an event held in the first room, the control means, when an event is being held in the first room and the event is of a preset type, controls to execute individual ventilation by the second ventilation means, when an event is being held in the first room and the event is different from the preset type of event, controls to execute cascade ventilation by the first ventilation means, when it is a time period before and after an event is held in the first room, controls to execute cascade ventilation by the first ventilation means, The ventilation system according to Claim 1.

3. The information regarding the usage status of the first room is information regarding the carbon dioxide concentration in the air discharged from the first room, the control means controls to execute individual ventilation by the second ventilation means when the carbon dioxide concentration in the air discharged from the first room is equal to or higher than a threshold value, The ventilation system according to Claim 1 or Claim 2.

4. The control means controls to execute individual ventilation by the second ventilation means when the carbon dioxide concentration in the second room is equal to or higher than a threshold value, The ventilation system according to Claim 1 or Claim 2.

Images