WO2024047803A1

WO2024047803A1 - Ventilation system, control device, and ventilation control method

Info

Publication number: WO2024047803A1
Application number: PCT/JP2022/032796
Authority: WO
Inventors: 春実山口; 信齊藤
Original assignee: 三菱電機株式会社
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2024-03-07

Abstract

This ventilation system comprises: a ventilation amount change necessity determining unit (201) for determining whether it is necessary to increase an amount of ventilation of a first room; an air conditioning determining unit (202) for determining whether air conditioning of the first room is being performed by an air conditioner (4); a predicting unit (203) which, if it is necessary to increase the amount of ventilation of the first room and air conditioning of the first room is being performed, predicts whether an insufficiency would arise in an air conditioning capability of the air conditioner (4) if the amount of ventilation of the first room were increased by the required amount; and a ventilation control unit (204) which, if it is predicted that an insufficiency would arise in the air conditioning capability of the air conditioner (4), controls an exhaust damper (6) for discharging air in the first room to the outside to increase an amount of exhaust from the first room, and controls an air supply damper (5) for supplying outside air to a second room adjacent to the first room to increase an amount of air supplied to the second room. In this way, spreading of contaminants can be prevented, and the thermal comfort of a user can be ensured.

Description

Ventilation system, control device and ventilation control method

The present disclosure relates to a ventilation system, a control device, and a ventilation control method.

Recently, ventilation has become important as a measure against infectious diseases in buildings. In addition, it is possible to efficiently provide sufficient ventilation by adjusting the ventilation amount as appropriate, such as temporarily increasing the ventilation amount when the number of people in the room increases and decreasing the ventilation amount when there are no people in the room. It has been demanded.

Conventionally, various proposals have been made regarding techniques for adjusting the amount of ventilation in each room. For example, Patent Document 1 discloses a ventilation system in which each room in a house is provided with an air supply damper that can supply a variable amount of air to supply outside air into the room.

Japanese Unexamined Patent Publication No. 7-103526

However, with the ventilation system of Patent Document 1 and other conventional technologies, there is a problem that indoor pollutants spread to other rooms, hallways, etc. Additionally, if a room that requires increased ventilation is being air-conditioned, the increased air conditioning load will increase the air conditioning capacity of the air conditioner, impairing the thermal comfort of the user. There is also the issue of

The present disclosure has been made to solve the above problems, and provides a ventilation system, etc. that can secure the necessary ventilation amount, prevent the diffusion of pollutants, and ensure thermal comfort for the user. The purpose is to provide

In order to achieve the above objective, the ventilation system according to the present disclosure includes:
a first air supply means for supplying outside air to the first room;
a second air supply means for supplying outside air to a second room adjacent to the first room;
a first exhaust means for exhausting air from the first room outdoors;
a second exhaust means for exhausting the air in the second room outdoors;
Necessity determining means for determining whether it is necessary to increase the ventilation amount of the first room;
air conditioning determining means for determining whether or not the first room is being air-conditioned by an air conditioner;
When it is necessary to increase the amount of ventilation in the first room and the first room is being air-conditioned, if the amount of ventilation in the first room is increased by the required amount, the air conditioning A prediction means for predicting whether or not there will be a shortage of air conditioning capacity of an aircraft;
If it is predicted that the air conditioning capacity of the air conditioner will be insufficient, the first exhaust means is controlled to increase the amount of exhaust air from the first room, and the second air supply means is controlled. ventilation control means for increasing the amount of air supplied to the second room.

According to the present disclosure, it is possible to prevent the diffusion of pollutants while ensuring the necessary ventilation amount, and to ensure the thermal comfort of the user.

A diagram showing the overall configuration of a ventilation system in Embodiment 1 Block diagram showing the hardware configuration of the server in Embodiment 1 A diagram showing the configuration of a ventilation device in Embodiment 1 Block diagram showing the configuration of a ventilation unit in Embodiment 1 A diagram showing how a ventilation device, an air conditioner, a supply air damper, an exhaust damper, and a pollutant sensor are installed in Embodiment 1. Block diagram showing the hardware configuration of an air conditioner in Embodiment 1 Block diagram showing the functional configuration of the server in Embodiment 1 Flowchart showing the procedure of ventilation control processing in Embodiment 1 Flowchart showing the procedure of ventilation control processing in Embodiment 2 A diagram showing the overall configuration of a ventilation system in Embodiment 4 A diagram showing how an air conditioner, an air supply fan, an exhaust fan, and a pollutant sensor are installed in Embodiment 4.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The ventilation system according to the present disclosure can be applied to various buildings such as residences, office buildings, commercial facilities, public facilities, etc., but in the following embodiments, the case where it is applied to a residence will be explained as an example.

(Embodiment 1)
FIG. 1 is a diagram showing the overall configuration of a ventilation system 1 in the first embodiment. The ventilation system 1 is a system that ventilates a house H, which is a single-family house or an apartment complex, and is an example of the ventilation system according to the present disclosure. As shown in FIG. 1, the ventilation system 1 includes a server 2, a ventilation device 3, a plurality of air conditioners 4, a plurality of supply air dampers 5, a plurality of exhaust dampers 6, and a plurality of pollutant sensors 7. , and a router 8.

<Server 2>
The server 2 is an example of a control device according to the present disclosure. The server 2 is a so-called cloud server, and provides a ventilation control service for properly ventilating each room in the house H.

As shown in FIG. 2, the server 2 has a hardware configuration including a communication interface 20, a CPU (Central Processing Unit) 21, a ROM (Read Only Memory) 22, a RAM (Random Access Memory) 23, and an auxiliary memory. A device 24 is provided. These components are interconnected via a bus 25. The communication interface 20 is hardware for communicating with other devices via the network N1, which is a wide area network such as the Internet, and is, for example, an interface based on Ethernet (registered trademark).

The CPU 21 controls the server 2 in an integrated manner. Details of the functions of the server 2 realized by the CPU 21 will be described later. The ROM 22 stores a plurality of firmwares and data used when executing these firmwares. RAM23 is used as a work area for CPU21.

The auxiliary storage device 24 is composed of a readable and writable nonvolatile semiconductor memory, an HDD (Hard Disk Drive), and the like. Examples of the readable and writable nonvolatile semiconductor memory include EEPROM (Electrically Erasable Programmable Read-Only Memory) and flash memory. The auxiliary storage device 24 stores a ventilation control program, which is a program for realizing a ventilation control service, and data used when executing the ventilation control program.

The server 2 can acquire the ventilation control program or an update program for updating the ventilation control program from another server through communication via the network N1. These programs can also be used on CD-ROMs (Compact Disc Read-Only Memory), DVDs (Digital Versatile Discs), magneto-optical discs, USB (Universal Serial Bus) memory, HDDs, SSDs (Solid-State Drives), and memory cards. It is also possible to store and distribute it in a computer-readable recording medium such as. When such a recording medium is directly or indirectly attached to the server 2, the server 2 can also read and import the ventilation control program or update program from the recording medium.

<Ventilation device 3>
The ventilation system 3 is a so-called central ventilation system for ensuring ventilation of the entire house H, and as shown in FIG. It includes an air supply duct 33 and a plurality of exhaust ducts 34.

As shown in FIG. 4, the ventilation unit 30 includes an air supply fan 300, an exhaust fan 301, a communication interface 302, and a control circuit 303. The air supply fan 300 is a fan that takes in outdoor air (that is, outside air) through the integrated air supply duct 31 and sends out the taken in outside air to each room of the house H. The rotation speed of the air supply fan 300, that is, the amount of air blown by the air supply fan 300, is adjusted according to a command from the control circuit 303. The exhaust fan 301 is a fan for taking in air from each room and exhausting the taken air to the outdoors via the integrated exhaust duct 32. The rotation speed of the exhaust fan 301, that is, the amount of air blown by the exhaust fan 301, is adjusted according to a command from the control circuit 303.

The communication interface 302 is hardware for connecting to the network N2 built in the house H by the router 8 and communicating with the server 2 via the router 8. The amount of outside air taken in by the ventilation device 3 and the amount of air discharged outdoors are adjusted by control commands from the server 2. Note that the communication interface 302 may be hardware for long-distance wireless communication for directly communicating with the server 2 without going through the router 8. Alternatively, the ventilation unit 30 may be configured to communicate with the server 2 via an external communication adapter.

The control circuit 303 is configured to include a CPU, ROM, RAM, readable/writable nonvolatile semiconductor memory, etc., and controls the ventilation device 3 in an integrated manner. Examples of the readable and writable nonvolatile semiconductor memory include EEPROM and flash memory.

Each air supply duct 33 is a duct for distributing and supplying the outside air taken in by the ventilation unit 30 to each room, and is arranged in the ceiling of the house H. In this embodiment, as shown in FIG. 5, the air supply duct 33a is arranged to supply outside air to room A, and the air supply duct 33b is arranged to supply outside air to room B. , an air supply duct 33c is arranged to supply outside air to the room C.

Each exhaust duct 34 is a duct for taking in air from each room and conveying it to the ventilation unit 30, and is arranged in the ceiling of the house H. The air in each room conveyed to the ventilation unit 30 is exhausted to the outdoors via the integrated exhaust duct 32. That is, each exhaust duct 34 can be said to be a duct for exhausting air from each room. In this embodiment, as shown in FIG. 5, an exhaust duct 34a is arranged to take in air from room A, an exhaust duct 34b is arranged to take in air from room B, and an exhaust duct 34c is arranged to take in air from room B. is arranged so as to take in air from room C.

<Air conditioner 4>
The air conditioner 4 is an example of an air conditioner according to the present disclosure. The air conditioner 4 is an indoor unit of a so-called room air conditioner, and is connected to an outdoor unit (not shown) via a communication line and a refrigerant pipe. The air conditioner 4 is installed in each room of the house H. In this embodiment, as shown in FIG. 5, an air conditioner 4a is installed in room A, an air conditioner 4b is installed in room B, and an air conditioner 4c is installed in room C.

As shown in FIG. 6, the air conditioner 4 includes a heat exchanger 40, a fan 41, a louver 42, a suction temperature sensor 43, an outlet temperature sensor 44, a humidity sensor 45, a thermal image sensor 46, and a communication It includes an interface 47 and a control circuit 48. The heat exchanger 40 exchanges heat between indoor air taken in by the fan 41 and refrigerant from an outdoor unit (not shown). The heat exchanger 40 functions as an evaporator during cooling operation, and functions as a condenser during heating operation.

The fan 41 takes in indoor air from an inlet (not shown), and sends out the air that has been heat exchanged by the heat exchanger 40 into the room from an outlet (not shown). The rotation speed of the fan 41, that is, the amount of air blown by the fan 41, is adjusted according to a command from the control circuit 48. The louver 42 adjusts the direction of air sent into the room by the fan 41. The angle of the louver 42, that is, the direction of the wind, is adjusted according to commands from the control circuit 48.

The suction temperature sensor 43 measures the temperature of the indoor air taken in (that is, sucked in) by the fan 41. Suction temperature sensor 43 outputs a signal indicating the measured temperature to control circuit 48 in response to a request from control circuit 48 . The blowout temperature sensor 44 measures the temperature of the air that has been heat exchanged by the heat exchanger 40, that is, the temperature of the air that is blown into the room from the blowout port. The blowout temperature sensor 44 outputs a signal indicating the measured temperature to the control circuit 48 in response to a request from the control circuit 48 . The humidity sensor 45 measures the humidity of the indoor air taken in by the fan 41. Humidity sensor 45 outputs a signal indicating the measured humidity to control circuit 48 in response to a request from control circuit 48 .

The thermal image sensor 46 is an infrared thermograph and acquires a thermal image of the room. In response to a request from the control circuit 48, the thermal image sensor 46 outputs data indicating the acquired thermal image (hereinafter referred to as "thermal image data") to the control circuit 48.

The communication interface 47 is hardware for connecting to the network N2 and communicating with the server 2 via the router 8. Note that the communication interface 47 may be hardware for long-distance wireless communication for directly communicating with the server 2 without going through the router 8. Alternatively, the air conditioner 4 may be configured to communicate with the server 2 via an external communication adapter.

<Air supply damper 5>
The air supply damper 5 is an example of a first air supply means or a second air supply means according to the present disclosure. The air supply damper 5 is a so-called VAV (Variable Air Volume), and is installed at the end of each air supply duct 33 in the room direction, that is, near the air supply opening provided in the ceiling, and is installed at the end of each air supply duct 33 in the direction of the room, and is installed at the end of each air supply duct 33 in the direction of the room. Adjust the amount of air supplied (hereinafter referred to as "supply air amount"). In this embodiment, as shown in FIG. 5, an air supply damper 5a is installed in the air supply duct 33a, an air supply damper 5b is installed in the air supply duct 33b, and an air supply damper 5c is installed in the air supply duct 33c. has been done.

The air supply damper 5 includes a communication interface for connecting to the network N2 and communicating with the server 2 via the router 8, and its opening degree is adjusted in accordance with a control command from the server 2. Note that the air supply damper 5 may be configured to include a communication interface for long-distance wireless communication for directly communicating with the server 2 without going through the router 8.

<Exhaust damper 6>
The exhaust damper 6 is an example of a first exhaust means or a second exhaust means according to the present disclosure. The exhaust damper 6 is a so-called VAV, and is installed at the end of each exhaust duct 34 in the room direction, that is, near the air intake port provided in the ceiling, and controls the amount of air taken in from the room for exhaust ( (hereinafter referred to as "displacement amount"). In this embodiment, as shown in FIG. 5, an exhaust damper 6a is installed in the exhaust duct 34a, an exhaust damper 6b is installed in the exhaust duct 34b, and an exhaust damper 6c is installed in the exhaust duct 34c.

The exhaust damper 6 is connected to the network N2 and includes a communication interface for communicating with the server 2 via the router 8, and its opening degree is adjusted in accordance with a control command from the server 2. Note that the exhaust damper 6 may be configured to include a communication interface for long-distance wireless communication for directly communicating with the server 2 without going through the router 8.

<Contaminant sensor 7>
The pollutant sensor 7 is a device that measures the amount of indoor pollutants (for example, CO ₂ , odor, PM (particulate matter), viruses, etc.). In this embodiment, as shown in FIG. 5, a pollutant sensor 7a is installed in room A, a pollutant sensor 7b is installed in room B, and a pollutant sensor 7c is installed in room C. The pollutant sensor 7 is equipped with a communication interface for connecting to the network N2 and communicating with the server 2 via the router 8, and periodically transmits data indicating measurement results (hereinafter referred to as "pollutant data") to the server 2. Send to. Note that the pollutant sensor 7 may be configured to include a communication interface for long-distance wireless communication for directly communicating with the server 2 without going through the router 8.

<Router 8>
The router 8 is a wireless LAN (Local Area Network) router such as Wi-Fi (registered trademark) or a wired LAN router. Note that the router 8 has both wireless LAN and wired LAN functions, and performs wireless communication with certain devices (ventilation unit 30, air conditioner 4, supply air damper 5, exhaust damper 6, or pollutant sensor 7). The device may be configured to perform wired communication with the device.

<Functional configuration of server 2>
FIG. 7 is a block diagram showing the functional configuration of the server 2. As shown in FIG. As shown in FIG. 7, the server 2 includes a data collection section 200, a ventilation amount change necessity determination section 201, an air conditioning determination section 202, a prediction section 203, and a ventilation control section 204. These functional units are realized by the CPU 21 executing the above-mentioned ventilation control program stored in the auxiliary storage device 24.

The data collection unit 200 periodically (for example, once every minute Collect data on each. Each piece of data collected will be explained below.

<<Ventilation data>>
The data collection unit 200 requests ventilation data from the ventilation device 3 (specifically, the ventilation unit 30). Upon receiving such a request, the ventilation device 3 transmits ventilation data including its own device ID, the current time, the rotation speed of the air supply fan 300, and the rotation speed of the exhaust fan 301 to the server 2. The device ID (identifier) is information for uniquely identifying each device (that is, the ventilation device 3, each air conditioner 4, each supply air damper 5, each exhaust damper 6, and each pollutant sensor 7). The device ID is, for example, the serial number (also referred to as manufacturing number or serial code) of the device. Note that when the ventilation device 3 includes a sensor that measures outside air temperature, the outside air temperature measured by the sensor may be included in the ventilation data. Further, the ventilation device 3 may spontaneously transmit ventilation data to the server 2.

<<Air conditioning data>>
The data collection unit 200 requests air conditioning data from each air conditioner 4. Upon receiving such a request, each air conditioner 4 transmits air conditioning data including its own device ID, current time, and operating state to the server 2. The operating status includes the operating mode (heating mode, cooling mode, etc.), information indicating whether it is running or stopped, suction temperature, outlet temperature, humidity, outside air temperature, thermal image data, fan air volume, refrigerant flow rate, refrigerant temperature, etc. is included. The air conditioner 4 obtains data that cannot be measured by itself, such as the outside air temperature, from the corresponding outdoor unit. Note that each air conditioner 4 may voluntarily transmit air conditioning data to the server 2.

<<Opening data>>
The data collection unit 200 requests opening degree data from each intake damper 5 and each exhaust damper 6. Upon receiving such a request, each supply air damper 5 and each exhaust damper 6 transmits opening degree data including its own device ID, current time, and opening degree to the server 2. Note that each air supply damper 5 and each exhaust damper 6 may voluntarily transmit opening degree data to the server 2.

<<Contaminant data>>
The data collection unit 200 requests pollutant data from each pollutant sensor 7. Upon receiving such a request, each pollutant sensor 7 transmits pollutant data including its own device ID, current time, and measurement results to the server 2. Note that each pollutant sensor 7 may voluntarily transmit pollutant data to the server 2.

The data collection unit 200 separates the above data collected from each device in chronological order and stores it in the collected data storage unit 240. That is, the collected data storage unit 240 stores the history of data collected from each device. The collected data storage unit 240 is a memory area provided by the auxiliary storage device 24.

The ventilation amount change necessity determination unit 201 is an example of necessity determination means according to the present disclosure. The ventilation amount change necessity determining unit 201 uses the property information corresponding to the house H stored in the property information storage unit 241, the air conditioning data of each air conditioner 4 and each pollution stored in the collected data storage 240. Based on the pollutant data from the substance sensor 7, it is determined whether or not the ventilation amount of each room in the house H needs to be changed. Specifically, the ventilation amount change necessity determining unit 201 determines whether or not an increase in ventilation amount is necessary and whether or not a decrease in ventilation amount is necessary.

The property information storage unit 241 is a memory area provided by the auxiliary storage device 24. The property information storage unit 241 stores property information of each user's house, that is, each house H. The property information includes room/equipment correspondence information indicating the correspondence between a room and the equipment (air conditioner 4, air supply damper 5, exhaust damper 6, pollutant sensor 7) corresponding to the room. Specifically, the room/device correspondence information is information that links the room ID and the device ID of each device. The room ID is an ID assigned to each room in each house H. The property information also includes the device ID of the ventilation system 3 installed in the house H. Further, the property information includes floor plan information indicating the floor plan of the house H.

The ventilation amount change necessity determination unit 201 acquires the number of people in the room from the thermal image data included in the air conditioning data, and determines that it is necessary to change the ventilation amount of the room when the number of people in the room changes. . Specifically, when the number of people in the room increases, the ventilation amount change necessity determining unit 201 determines that it is necessary to increase the ventilation amount in the room, and when the number of people in the room decreases, the ventilation amount change necessity determination unit 201 It is determined that the ventilation volume needs to be reduced.

Furthermore, the ventilation amount change necessity determining unit 201 determines whether or not it is necessary to change the ventilation amount of the room based on the measurement results included in the pollutant data, that is, the amount of pollutants. In detail, the ventilation amount change necessity determination unit 201 determines the degree of pollution (low, low, (indicated by medium or high). Then, the ventilation amount change necessity determination unit 201 determines whether or not a ventilation amount change is necessary based on the current ventilation amount of the room and the obtained degree of contamination.

For example, if the current ventilation rate is the normally set ventilation rate and the pollution degree is other than "low" (that is, medium or high), the ventilation rate change necessity determination unit 201 determines whether the ventilation rate in the room is It is determined that the amount needs to be increased. In addition, if the current ventilation rate is larger than the normally set ventilation rate and the pollution level is "low", the ventilation rate change necessity determining unit 201 determines that the ventilation rate of the room needs to be reduced. judge.

The air conditioning determination unit 202 is an example of an air conditioning determination unit according to the present disclosure. The air conditioning determining unit 202 determines whether or not the room is being air-conditioned by the air conditioner 4, that is, whether or not the room is being air-conditioned. Specifically, the air conditioning determination unit 202 checks the operating state included in the air conditioning data, and if the air conditioner 4 is in operation, it determines that the room is being air conditioned, and if it is stopped, it determines that the room is being air conditioned. It is determined that the room is not being air-conditioned.

The prediction unit 203 is an example of a prediction means according to the present disclosure. The prediction unit 203 determines whether an increase in the ventilation amount is necessary and if there is a room that is being air-conditioned based on the determination results of the ventilation amount change necessity determining unit 201 and the air conditioning determining unit 202, the prediction unit 203 determines whether the ventilation amount of the room is necessary or not. It is predicted whether or not there will be a shortage in the air conditioning capacity of the air conditioner 4 when the amount increases. Specifically, first, the prediction unit 203 calculates the air conditioning load (hereinafter referred to as "L1") of the air conditioner 4 when the ventilation amount of the room is increased by the required amount using the following formula.

(Formula 1)
L1 = Current air conditioning capacity of the air conditioner 5 (hereinafter referred to as "C1") + ventilation load when the ventilation amount of the room is increased by the required amount (hereinafter referred to as "L2")

In Equation 1, C1 can be calculated by the product of the enthalpy change of the refrigerant and the refrigerant flow rate, or the product of the difference between the blowout temperature and the suction temperature, the air volume, the specific heat of the air, and the density of the air. Moreover, L2 is calculated by the following formula.

(Formula 2)
L2 = (Outside air temperature - Intake temperature of the room) x Increased ventilation amount x Specific heat of air x Density of air

The prediction unit 203 compares L1 calculated as described above with the maximum air conditioning capacity of the air conditioner 4, and if the maximum air conditioning capacity is greater than L1, the prediction unit 203 determines that there is no shortage of air conditioning capacity of the air conditioner 4. If the maximum air conditioning capacity is less than or equal to L1, it is determined that the air conditioning capacity of the air conditioner 4 is insufficient. The server 2 can acquire the maximum air conditioning capacity from the air conditioner 4 through communication. For example, the server 2 requests product information from each air conditioner 4 at a predetermined timing, and each air conditioner 4 that receives the request sends product information including its own maximum air conditioning capacity to the server 2. Alternatively, the maximum air conditioning capacity may be included in the air conditioning data sent from each air conditioner 4 to the server 2.

Alternatively, the prediction unit 203 may obtain the maximum air conditioning capacity of the air conditioner 4 by referring to a product information DB (database) not shown from the device ID of the air conditioner 4. In this case, the product information DB may be provided in the server 2 or may be provided in another server that can communicate with the server 2.

The ventilation control unit 204 is an example of ventilation control means according to the present disclosure. The ventilation control unit 204 controls the ventilation device 3, each supply air damper 5, and each exhaust damper 6 in the house H based on the determination result of the ventilation amount change necessity determination unit 201 and the prediction result of the prediction unit 203. do. For example, when the ventilation amount change necessity determination unit 201 determines that it is necessary to increase the ventilation amount, and the prediction unit 203 predicts that there will be no shortage of air conditioning capacity of the air conditioner 4, or When the amount change necessity determining unit 201 determines that it is necessary to reduce the ventilation amount, the ventilation control unit 204 performs normal ventilation control (hereinafter referred to as "normal ventilation control").

In normal ventilation control, the ventilation control unit 204 controls the air supply damper 5 and exhaust damper 6 of the room to increase or decrease the air supply amount and exhaust amount of the room by the same amount. Specifically, when increasing the ventilation amount of the room in normal ventilation control, the ventilation control unit 204 controls the air supply damper 5 of the room to increase the air supply amount by Q1SUP, and increases the air supply amount by Q1SUP by controlling the air supply damper 5 of the room. is controlled to increase the displacement by Q1EX. Q1SUP and Q1EX are equal to the increase or decrease in the required ventilation volume, and are based on the event that caused the ventilation volume to change (change in the number of people in the room or change in the degree of contamination) and its degree (number of changes or change It is determined by the size of

For example, when the number of people in room A increases from one to two, the ventilation control unit 204 controls the air supply damper 5a of room A to increase the air supply volume by 30 ^m3 , and exhausts the room A. The damper 6a is controlled to increase the displacement ^by 30 m3. Further, when the number of people in room A decreases from two to one, the ventilation control unit 204 controls the air supply damper 5a of room A to reduce the supply air volume ^by 30 m3, and exhausts the room A. The damper 6a is controlled to reduce the displacement by ^30m3 .

Note that Q1SUP and Q1EX do not necessarily have to be equal, and may be different as long as no inconvenience occurs.

Furthermore, the ventilation control unit 204 controls the ventilation device 3 to adjust the intake amount of outside air and the amount of exhaust air to the outside in order to match the change in the air supply amount and exhaust amount of the room.

Next, ventilation control for ensuring thermal comfort (hereinafter referred to as "comfort ensuring control") executed by the ventilation control unit 204 will be explained. If there is a room that requires an increase in ventilation volume, is currently being air-conditioned, and is predicted to lack the air-conditioning capacity of the corresponding air conditioner 4, the ventilation control unit 204 performs comfort ensuring control for the room. Execute. Specifically, the ventilation control unit 204 controls the exhaust damper 6 of the room (hereinafter referred to as "ventilation target room") to increase the exhaust amount by Q1EX. Further, the ventilation control unit 204 controls the air supply damper 5 of a room adjacent to the ventilation target room (hereinafter referred to as "adjacent room") to increase the air supply amount by Q1SUP. The room to be ventilated is an example of a first room according to the present disclosure, and the adjacent room is an example of a second room according to the present disclosure.

For example, when performing comfort ensuring control for room A, the ventilation control unit 204 controls the exhaust damper 6a of room A (that is, the room to be ventilated) to increase the exhaust volume by Q1EX. Further, the ventilation control unit 204 controls the air supply damper 5b of the room B adjacent to the room A (that is, the adjacent room) to increase the air supply amount by Q1SUP. In this case, the exhaust damper 6a is an example of the first exhaust means according to the present disclosure, and the air supply damper 5b is an example of the second air supply means according to the present disclosure.

As a result, the air pressure in the adjacent room becomes higher than the air pressure in the room to be ventilated, creating an airflow from the adjacent room to the room to be ventilated, and the air from the adjacent room passes through door undercuts, vents, gaps, etc. flows into. The amount of air flowing into the room to be ventilated is approximately equal to the difference between the air supply amount in the adjacent room and the air supply amount in the ventilation target room.

In addition, the ventilation control unit 204 controls the ventilation device 3 to match the change in the exhaust volume of the room to be ventilated with the change in the air supply volume of the adjacent room, and controls the amount of outside air taken in and exhausted to the outdoors. Adjust amount.

Note that even if the comfort ensuring control has been executed, if the insufficient air conditioning capacity of the air conditioner 4 is not resolved, the ventilation control unit 204 controls the exhaust damper 6 of the room to be ventilated to reduce the exhaust volume to Q2EX, which is smaller than Q1EX. and controls the air supply damper 5 in the adjacent room to increase the air supply amount by Q2SUP, which is smaller than Q1SUP. Q2EX and Q2SUP are, for example, ^10m3 .

<Ventilation control processing>
FIG. 8 is a flowchart showing the procedure of ventilation control processing executed by the server 2. The server 2 periodically (for example, every minute) executes the following ventilation control process.

(Step S100)
The server 2 collects data from the ventilation device 3, each air conditioner 4, each supply air damper 5, each exhaust damper 6, and each pollutant sensor 7. After that, the process of the server 2 transitions to step S101.

(Step S101)
The server 2 determines whether there is a room that requires an increase in ventilation volume, is being air-conditioned, and is predicted to have insufficient capacity of the air conditioner 4. If there is a corresponding room (step S101; YES), the process of the server 2 transitions to step S102. On the other hand, if there is no corresponding room (step S101; NO), the process of the server 2 transitions to step S105.

(Step S102)
The server 2 determines whether ventilation control for ensuring thermal comfort (ie, comfort ensuring control) has not been performed for the room. If the comfort ensuring control is not executed (step S102; YES), the process of the server 2 transitions to step S103. On the other hand, if the comfort ensuring control has been executed (step S102; NO), the process of the server 2 transitions to step S104.

(Step S103)
The server 2 controls the exhaust damper 6 of the room to increase the exhaust amount by Q1EX. Further, the server 2 controls the air supply damper 5 of the room adjacent to the room to increase the air supply amount by Q1SUP. After that, the server 2 ends the ventilation control process in this cycle.

(Step S104)
The server 2 controls the exhaust damper 6 of the room to increase the exhaust amount by Q2EX, which is smaller than Q1EX. Further, the server 2 controls the air supply damper 5 of the room adjacent to the room to increase the air supply amount by Q2SUP, which is smaller than Q1SUP. After that, the server 2 ends the ventilation control process in this cycle.

(Step S105)
The server 2 executes normal ventilation control and ends the ventilation control process in this cycle.

As explained above, in the ventilation system 1 according to the present embodiment, when an increase in the ventilation amount is required for a certain room, the room is being air-conditioned, and the capacity of the corresponding air conditioner 4 is predicted to be insufficient, The server 2 increases the exhaust volume of the room (ie, the ventilation target room) and increases the air supply volume of the room adjacent to the ventilation target room (ie, the adjacent room). This causes the air pressure in the ventilated room to be lower than the air pressure in the adjacent room, and an amount of air corresponding to the increased air supply volume of the adjacent room (i.e., an amount equivalent to the increased exhaust volume of the ventilated room) is transferred to the adjacent room. and flows into the room to be ventilated.

Therefore, it is possible to prevent the spread of pollutants to other rooms while ensuring the necessary amount of ventilation. Furthermore, since indoor air is supplied to the room to be ventilated, it is possible to prevent insufficient air conditioning capacity of the air conditioner 4 in the room to be ventilated, and it is possible to ensure thermal comfort for the user.

(Modification 1)
If a dedicated remote controller (not shown) is installed in the house H, which receives instructions regarding ventilation from the user, information indicating the user's instructions (hereinafter referred to as "user instruction information") is transmitted from the dedicated remote controller to the server 2. You may also do so. Alternatively, user instruction information may be transmitted to the server 2 from a user terminal such as a smartphone or a tablet terminal. In such a configuration, the ventilation amount change necessity determination unit 201 of the server 2 may further determine whether or not the ventilation amount change of each room is necessary based on the received user instruction information.

(Modification 2)
Instead of each air supply damper 5, an air supply fan corresponding to each room may be installed, and the amount of air supplied from the ventilation unit 30 to each room may be adjusted by each air supply fan. In this case, each air supply fan is an example of the first air supply means or the second air supply means according to the present disclosure. Note that each air supply damper 5 and each air supply fan may be used together. Furthermore, instead of each exhaust damper 6, an exhaust fan corresponding to each room may be installed, and the amount of air taken in from each room may be adjusted by each exhaust fan. In this case, each exhaust fan is an example of the first exhaust means or the second exhaust means according to the present disclosure. Note that each exhaust damper 6 and each exhaust fan may be used together.

(Modification 3)
If each room is separately installed with a temperature sensor that measures the air temperature, a motion sensor that detects the presence or absence of a person, etc., the server 2 also uses the measurement results of these sensors to control the ventilation in the house H. May be executed. Furthermore, when the air conditioner 4 is equipped with a sensor that measures the amount of indoor pollutants (for example, CO ₂ , odor, PM, viruses, etc.), the server 2 also uses the measurement results of the sensor of the air conditioner 4. Ventilation control in the house H may be performed using the air conditioner.

(Modification 4)
The ventilation unit 30 may be configured to include a total heat exchanger that performs total heat exchange (sensible heat exchange and latent heat exchange) between indoor air and outdoor air, or may be configured to include a mechanism for purifying the air. It may be. Mechanisms for cleaning the air include, for example, air filters such as medium-high performance filters and HEPA (High Efficiency Particulate Air) filters, electrostatic precipitators, ultraviolet irradiators, and the like.

(Modification 5)
Instead of the server 2, ventilation control of the house H may be performed by an in-house controller that is installed in the house H and has the same functions as the server 2 (see FIG. 7). In this case, the in-home controller is an example of a control device according to the present disclosure.

(Modification 6)
Instead of the server 2, a control circuit 303 included in the ventilation unit 30 of the ventilation system 3 has the same function as the server 2 (see FIG. 7), and the control circuit 303 controls the ventilation of the house H. Good too. In this case, the control circuit 303 is an example of a control device according to the present disclosure.

(Modification 7)
The server 2 may be made up of a plurality of servers.

(Modification 8)
The air conditioner 4 may be an indoor unit of a so-called housing air conditioner.

(Modification 9)
All or part of the functional units of the server 2 (see FIG. 7) may be realized by dedicated hardware. The dedicated hardware is, for example, a single circuit, a composite circuit, a programmed processor, an ASIC (Application-Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof.

The technical ideas related to each of the above-mentioned modifications may be realized individually, or may be realized in combination as appropriate.

(Embodiment 2)
Next, a second embodiment of the present disclosure will be described. Note that in the following description, the same components and the like as those in Embodiment 1 are given the same reference numerals, and the description thereof will be omitted.

The server 2 in Embodiment 2 is configured in advance to perform ventilation control for ensuring thermal comfort (i.e., comfort ensuring control) when there are a plurality of adjacent rooms adjacent to the room to be ventilated (i.e., the first room). It has an air supply room selection function that selects one adjacent room that meets predetermined conditions as the room in which the amount of air supply is to be increased (hereinafter referred to as the "air supply room"). The air supply room selection function is a function included in the ventilation control unit 204. The air supply room is an example of the second room according to the present disclosure.

Specifically, when there are multiple adjacent rooms, the ventilation control unit 204 selects an air supply room from among the multiple adjacent rooms by sequentially narrowing down the rooms based on conditions 1 to 3 below.

Condition 1: The air conditioner 4 of the adjacent room is in operation Condition 2: Even if the air supply amount of the adjacent room increases by the required amount (i.e. Q1SUP), the air conditioner corresponding to the adjacent room will not continue to air condition. There is no shortage of capacity Condition 3: The COP (Coefficient Of Performance) of the air conditioner 4 after increasing the air supply amount in the adjacent room by Q1SUP is higher than the air conditioner 4 in any other adjacent room.

Narrowing down using condition 2 is performed when there are multiple adjacent rooms that meet condition 1, and narrowing down using condition 3 is performed when there are multiple adjacent rooms that meet condition 2.

In condition 2, first, the ventilation control unit 204 calculates the air conditioning load (hereinafter referred to as "L3") of the air conditioner 4 when the air supply amount of the adjacent room is increased by Q1SUP using the following formula.

(Formula 3)
L3 = Current air conditioning capacity of the air conditioner 5 (hereinafter referred to as "C2") + ventilation load when the air supply amount of the relevant adjacent room is increased by Q1SUP (hereinafter referred to as "L4")

In Equation 3, C2 can be calculated by the product of the enthalpy change of the refrigerant and the refrigerant flow rate, or the product of the difference between the blowout temperature and the suction temperature, the air volume, the specific heat of the air, and the density of the air. Moreover, L4 is calculated by the following formula.

(Formula 4)
L4 = (Outside air temperature - Suction temperature of the adjacent room) x Q1SUP x Specific heat of air x Density of air

The ventilation control unit 204 compares L3 calculated as above with the maximum air conditioning capacity of the air conditioner 4, and if the maximum air conditioning capacity is greater than L3, there is no shortage of air conditioning capacity of the air conditioner 4. If the maximum air conditioning capacity is equal to or lower than L3, it is determined that the air conditioning capacity of the air conditioner 4 is insufficient.

In condition 3, the COP of the air conditioner after increasing the air supply amount is estimated from the COP curve. The COP curve is created based on the rated COP shown in the product information of the air conditioner 4, the air conditioning capacity at that time, the intermediate COP and the air conditioning capacity at that time, and the assumption that the COP is 0 when the air conditioning capacity is 0. Ru. Note that the current COP may be used instead of the COP after the increase in air supply amount. The current COP is calculated by the following formula.

(Formula 5)
Current COP = Current air conditioning capacity of the air conditioner 4 ÷ Current power consumption of the air conditioner 4

The server 2 can acquire product information from the air conditioner 4 through communication. Alternatively, the server 2 may acquire the product information of the air conditioner 4 by referring to a product information DB (not shown) from the device ID of the air conditioner 4. In this case, the product information DB may be provided in the server 2 or may be provided in another server that can communicate with the server 2. Furthermore, the server 2 can acquire the current power consumption of the air conditioner 4 as data included in the air conditioning data.

<Ventilation control processing>
FIG. 9 is a flowchart showing the procedure of ventilation control processing executed by the server 2 in the second embodiment. The server 2 periodically (for example, every minute) executes the following ventilation control process.

(Step S200)
The server 2 collects data from the ventilation device 3, each air conditioner 4, each supply air damper 5, each exhaust damper 6, and each pollutant sensor 7. After that, the process of the server 2 transitions to step S201.

(Step S201)
The server 2 determines whether there is a room that requires an increase in ventilation volume, is being air-conditioned, and is predicted to have insufficient capacity of the air conditioner 4. If there is a corresponding room (step S201; YES), the process of the server 2 transitions to step S202. On the other hand, if there is no corresponding room (step S201; NO), the process of the server 2 transitions to step S208.

(Step S202)
The server 2 determines whether there are multiple adjacent rooms. If there are multiple adjacent rooms (step S202; YES), the process of the server 2 transitions to step S203. On the other hand, if a plurality of adjacent rooms do not exist (step S202; NO), the process of the server 2 transitions to step S204.

(Step S203)
The server 2 selects the optimal adjacent room as the air supply room from among the plurality of adjacent rooms based on the above conditions 1 to 3. After that, the process of the server 2 transitions to step S205.

(Step S204)
The server 2 determines the adjacent room as the air supply room. After that, the process of the server 2 transitions to step S205.

(Step S205)
The server 2 determines whether ventilation control for ensuring thermal comfort (ie, comfort ensuring control) has not been performed for the room. If the comfort ensuring control is not executed (step S205; YES), the process of the server 2 transitions to step S206. On the other hand, if the comfort ensuring control has been executed (step S205; NO), the process of the server 2 transitions to step S207.

(Step S206)
The server 2 controls the exhaust damper 6 of the room to increase the exhaust amount by Q1EX. Further, the server 2 controls the air supply damper 5 in the air supply room to increase the amount of air supply by Q1SUP. After that, the server 2 ends the ventilation control process in this cycle.

(Step S207)
The server 2 controls the exhaust damper 6 of the room to increase the exhaust amount by Q2EX, which is smaller than Q1EX. Further, the server 2 controls the air supply damper 5 in the air supply room to increase the amount of air supply by Q2SUP, which is smaller than Q1SUP. After that, the server 2 ends the ventilation control process in this cycle.

(Step S208)
The server 2 executes normal ventilation control and ends the ventilation control process in this cycle.

As explained above, in the ventilation system 1 according to the present embodiment, when an increase in the ventilation amount is required for a certain room, the room is being air-conditioned, and the capacity of the corresponding air conditioner 4 is predicted to be insufficient, The server 2 increases the exhaust volume of the room (i.e., the ventilation target room), determines a room adjacent to the ventilation target room (i.e., the adjacent room) as the air supply room, and increases the air supply volume of the ventilation target room. . This causes the air pressure in the ventilated room to be lower than the air pressure in the air supply room, and an amount of air corresponding to the increased air supply volume in the ventilation room (i.e., an amount equivalent to the increased exhaust volume in the ventilated room) is removed. Air flows from the air supply room into the room to be ventilated.

In addition, if there are multiple adjacent rooms, the server 2 selects the optimal adjacent room as the air supply room based on predetermined conditions, so that the thermal comfort of the room to be ventilated can be more reliably ensured. , the energy efficiency of the entire house H can be improved.

Note that each modification of Embodiment 1 can be applied to this embodiment as well.

(Embodiment 3)
Next, Embodiment 3 of the present disclosure will be described. Note that in the following description, the same components and the like as those in Embodiment 1 are given the same reference numerals, and the description thereof will be omitted.

The server 2 in the third embodiment further includes an air pressure distribution information acquisition unit (not shown). The air pressure distribution information acquisition unit is an example of air pressure distribution information acquisition means according to the present disclosure. The air pressure distribution information acquisition unit acquires air pressure distribution information indicating the height relationship of air pressure in each room in the house H. For example, the air pressure distribution information acquisition unit may obtain the air pressure distribution information by estimating the air pressure distribution information based on the air supply amount and exhaust amount of each room, or may obtain the air pressure distribution information by estimating the air pressure distribution information based on the air supply amount and exhaust amount of each room, or may obtain the air pressure distribution information by estimating the air pressure distribution information based on the air supply amount and exhaust amount of each room. The air pressure distribution information may be obtained by estimating the air pressure distribution information based on the measurement result of a sensor, the measurement result of a wind speed sensor installed in the undercut of the door, or the like. In addition, when using the measurement results of the wind speed sensor, since the direction of the air flow is unknown, the air pressure distribution information can be estimated with high accuracy by taking into account the air supply and exhaust volumes of each room. becomes possible.

Alternatively, the air pressure distribution information acquisition unit may acquire the air pressure distribution information by estimating the air pressure distribution information using an analysis method called a so-called digital twin. With a digital twin, a thermal fluid analysis model and calculation environment are built on Server 2 or another server, and the floor plan of the target building, equipment performance information, and data such as actual room temperature and outside air temperature are input. , analyze future indoor temperature and air pressure.

The ventilation control unit 204 in this embodiment controls the ventilation device 3, each air supply damper 5, and each exhaust damper 6 in the house H, taking into account the air pressure distribution information acquired by the air pressure distribution information acquisition unit. Specifically, the ventilation control unit 204 determines a target air pressure distribution, and determines the control content of each air supply damper 5 and each exhaust damper 6 so that the air pressure distribution in the house H approaches the target.

For example, in FIG. 5, when the exhaust volume of room A is increased and the air supply volume of room B is increased by executing the comfort ensuring control, the air pressure of room B becomes higher than the air pressure of room A. It is estimated that the air pressure in room C, where the supply air amount and exhaust amount are not changed (the air supply amount remains equal to the exhaust amount), is higher than room A and lower than room B. In such a situation, if the amount of exhaust air from the ventilation fan (not shown) in the bathroom becomes larger than the difference between the air intake and exhaust amount in room B, there is a risk that pollutants generated in room A will move to the bathroom through the hallway. .

In the above case, the ventilation control unit 204 increases the exhaust volume of room A by, for example, Q1EX, and increases the air supply volume of room B so that the exhaust volume of the bathroom is equal to or less than the difference between the exhaust volume and supply air volume in room A. For example, increase Q1SUP. In addition, if the exhaust volume of room A is increased more than necessary, there is a risk that the air conditioning capacity of the air conditioner 4a in room A will be exceeded due to air flowing into room A from the hallway, and the smell and humidity of the bathroom may be increased. Since there is a risk that the air may move to room A, the ventilation control unit 204 determines the amount of increase in the air exhaust amount for room A and the air supply amount for room B so that the air in the hallway and bathroom does not move to room A.

As explained above, in the ventilation system 1 according to the present embodiment, the server 2 acquires air pressure distribution information indicating the height relationship of air pressure in each room, and takes into account the acquired air pressure distribution information to ventilate the house H. Execute control. Therefore, it is possible to more reliably prevent contaminants from spreading to other rooms, and it is possible to prevent insufficient air conditioning capacity of the air conditioner 4 in the room to be ventilated.

Note that each modification of Embodiment 1 and Embodiment 2 can be applied to this embodiment as well.

(Embodiment 4)
Next, a fourth embodiment of the present disclosure will be described. Note that in the following description, the same components and the like as those in Embodiment 1 are given the same reference numerals, and the description thereof will be omitted.

FIG. 10 is a diagram showing the overall configuration of a ventilation system 1A in Embodiment 4. The ventilation system 1A is a system that ventilates a house H, which is a single-family house or an apartment complex, and is an example of the ventilation system according to the present disclosure. As shown in FIG. 10, the ventilation system 1A includes a server 2, multiple air conditioners 4, multiple air supply fans 9, multiple exhaust fans 10, multiple pollutant sensors 7, and a router 8. Be prepared.

Unlike the ventilation system 1 of Embodiment 1, the ventilation system 1A is not a central ventilation system, but is equipped with an air supply fan 9 that takes in outside air and an exhaust fan 10 that exhausts indoor air to the outdoors, which are installed in each room. Ventilate the room. As shown in FIG. 11, in room A, an air supply fan 9a and an exhaust fan 10a are installed, in room B, an air supply fan 9b and an exhaust fan 10b are installed, and in room C, an air supply fan 9a and an exhaust fan 10a are installed. A fan 9c and an exhaust fan 10c are installed.

As in Embodiment 1, the ventilation control unit 204 of the server 2, when there is a room that requires an increase in ventilation volume, is being air-conditioned, and where the air-conditioning capacity of the corresponding air conditioner 4 is expected to be insufficient, Ventilation control to ensure thermal comfort (ie, comfort ensuring control) is executed for the room. In the comfort ensuring control of this embodiment, the ventilation control unit 204 controls the exhaust fan 10 of the room (that is, the room to be ventilated) to increase the exhaust amount by Q1EX. Further, the ventilation control unit 204 controls the air supply fan 9 of the room adjacent to the room to be ventilated (that is, the adjacent room) to increase the air supply amount by Q1SUP.

For example, when performing comfort ensuring control for room A, the ventilation control unit 204 controls the exhaust fan 10a of room A to increase the exhaust volume by Q1EX. Further, the ventilation control unit 204 controls the air supply fan 9b of the room B adjacent to the room A to increase the air supply amount by Q1SUP.

If the lack of air conditioning capacity of the air conditioner 4 is not resolved even after the comfort ensuring control has been executed, the ventilation control unit 204 controls the exhaust fan 10 in the room to be ventilated to increase the exhaust volume by Q2EX, which is smaller than Q1EX. , controls the air supply fan 9 in the adjacent room to increase the air supply amount by Q2SUP, which is smaller than Q1SUP.

According to the ventilation system 1A in this embodiment, like the ventilation system 1 in Embodiment 1, it is possible to prevent pollutants from spreading to other rooms while ensuring the necessary ventilation amount. Furthermore, since indoor air is supplied to the room to be ventilated, it is possible to prevent insufficient air conditioning capacity of the air conditioner 4 in the room to be ventilated, and it is possible to ensure thermal comfort for the user.

Additionally, the air supply fan 9 and the exhaust fan 10 have the advantage that the ventilation amount can be adjusted more accurately than the air supply damper 5 and the exhaust damper 6, and the operating noise is reduced.

Note that

Modifications

1, 3, 5, 7 to 9 of Embodiment 1, and Embodiments 2 and 3 can also be applied to this embodiment.

Various embodiments and modifications can be made to the present disclosure without departing from its broad spirit and scope. Further, the embodiments described above are for explaining the present disclosure, and do not limit the scope of the present disclosure. In other words, the scope of the present disclosure is indicated by the claims rather than the embodiments. Various modifications made within the scope of the claims and the meaning of the disclosure equivalent thereto are considered to be within the scope of the present disclosure.

The present disclosure can be suitably employed in a system that performs ventilation within a building.

1, 1A ventilation system, 2 server, 3 ventilation system, 4, 4a to 4c air conditioner, 5, 5a to 5c supply air damper, 6, 6a to 6c exhaust damper, 7, 7a to 7c pollutant sensor, 8 router, 9, 9a to 9c air supply fan, 10, 10a to 10c exhaust fan, 20, 47, 302 communication interface, 21 CPU, 22 ROM, 23 RAM, 24 auxiliary storage device, 25 bus, 30 ventilation unit, 31 integrated air supply Duct, 32 Integrated exhaust duct, 33, 33a-33c Supply air duct, 34, 34a-34c Exhaust duct, 40 Heat exchanger, 41 Fan, 42 Louver, 43 Suction temperature sensor, 44 Outlet temperature sensor, 45 Humidity sensor, 46 thermal image sensor, 48, 303 control circuit, 200 data collection unit, 201 ventilation amount change necessity determination unit, 202 air conditioning determination unit, 203 prediction unit, 204 ventilation control unit, 240 collected data storage unit, 241 property information storage unit, 300 Air supply fan, 301 Exhaust fan

Claims

a first air supply means for supplying outside air to the first room;
a second air supply means for supplying outside air to a second room adjacent to the first room;
a first exhaust means for exhausting air from the first room outdoors;
a second exhaust means for exhausting the air in the second room outdoors;
Necessity determining means for determining whether it is necessary to increase the ventilation amount of the first room;
air conditioning determining means for determining whether or not the first room is being air-conditioned by an air conditioner;
When it is necessary to increase the amount of ventilation in the first room and the first room is being air-conditioned, if the amount of ventilation in the first room is increased by the required amount, the air conditioning A prediction means for predicting whether or not there will be a shortage of air conditioning capacity of an aircraft;
If it is predicted that the air conditioning capacity of the air conditioner will be insufficient, the first exhaust means is controlled to increase the amount of exhaust air from the first room, and the second air supply means is controlled. ventilation control means for increasing the amount of air supplied to the second room.
The ventilation system according to claim 1, wherein the necessity determining means determines the necessity based on the number of people in the first room.
The ventilation system according to claim 1 or 2, wherein the necessity determining means determines the necessity based on the amount of pollutants in the first room.
Any one of claims 1 to 3, wherein the ventilation control means selects one room as the second room based on predetermined conditions when there are multiple rooms adjacent to the first room. Ventilation systems as described in Section.
further comprising air pressure distribution information acquisition means for acquiring air pressure distribution information indicating a height relationship of air pressure in each room in the building to which the first room and the second room belong,
The ventilation system according to any one of claims 1 to 4, wherein the ventilation control means controls the first exhaust means and the second air supply means in consideration of the air pressure distribution information.
Necessity determining means for determining whether or not it is necessary to increase the ventilation amount of the first room;
air conditioning determining means for determining whether or not the first room is being air-conditioned by an air conditioner;
When it is necessary to increase the amount of ventilation in the first room and the first room is being air-conditioned, if the amount of ventilation in the first room is increased by the required amount, the air conditioning A prediction means for predicting whether or not there will be a shortage of air conditioning capacity of an aircraft;
If it is predicted that the air conditioning capacity of the air conditioner will be insufficient, a first exhaust means for discharging air from the first room outdoors is controlled to increase the amount of exhaust air from the first room. and ventilation control means for increasing the amount of air supplied to the second room by controlling a second air supply means for supplying outside air to a second room adjacent to the first room. Control device.
The necessity determining means determines the necessity of increasing the ventilation amount of the first room,
an air conditioning determination means determines whether or not the first room is air conditioned by an air conditioner;
The prediction means increases the ventilation amount of the first room by the required amount when it is necessary to increase the ventilation amount of the first room and the first room is being air-conditioned. predicting whether or not there will be a shortage in the air conditioning capacity of the air conditioner in the case;
When it is predicted that the air conditioning capacity of the air conditioner will be insufficient, the ventilation control means controls the first exhaust means for exhausting the air from the first room to the outdoors. Ventilation control that increases the amount of air exhausted and controls a second air supply means that supplies outside air to a second room adjacent to the first room to increase the amount of air supplied to the second room. Method.