JP6701381B2 - Control device, ventilation system, ventilation method and program - Google Patents

Description

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

  A technique for suppressing discomfort caused by sound generated by ventilation is known.

  For example, Patent Literature 1 discloses a technique of suppressing noise of a ventilation fan. Specifically, the ventilating fan disclosed in Patent Document 1 controls the operating state so that the noise of the ventilating fan becomes lower than the ambient noise. As a result, when the surrounding area becomes quiet during operation of the ventilation fan, the noise of the ventilation fan also decreases in accordance with the decrease in the surrounding noise, so that the noise of the ventilation fan can be suppressed from being noisy.

JP, 1-5417, A

  However, in the technique disclosed in Patent Document 1, when the ambient noise is reduced, the ventilation volume is reduced, and thus the ventilation volume may be insufficient. Therefore, although it is possible to suppress the discomfort caused by the sound generated by ventilation, there is a problem that the discomfort caused by the insufficient ventilation increases.

  The present invention has been made to solve the above problems, and provides a control device and the like capable of suppressing discomfort caused by sound generated by ventilation while suppressing a lack of ventilation. The purpose is to

In order to achieve the above object, the control device according to the present invention,
A control device for controlling the ventilation volume of a plurality of ventilation devices,
A first information indicating the size of the sound in each of the plurality of areas which are ventilated by the plurality of ventilator, the presence of a person in each of the strength and the plurality of areas of odor in each of said plurality of areas Second information indicating at least one of presence and absence, and information acquisition means for acquiring
For each of the plurality of areas, when the second information satisfies a specific condition, the ventilation amount is controlled to a first specified amount, and the second information does not satisfy the specific condition. In this case, if the volume of the sound is larger than a second threshold, the ventilation volume is set to the first prescribed volume, and if the volume of the sound is smaller than the second threshold, the volume of the sound is large. Ventilation control means for decreasing the ventilation volume as the
When the sum of the ventilation volumes of the plurality of areas is smaller than a second prescribed volume, the ventilation control unit increases the ventilation volume of at least one area in which the person is not present, of the plurality of areas. .

According to the present invention, at least one of the first information indicating the loudness of the sound in the area ventilated by the ventilation device, the intensity of the odor in the area, and the presence or absence of a person in the area. acquires the second information indicating, a case where the second information satisfies a specific condition, by controlling the ventilation amount in the first prescribed amount, the second information does not satisfy the specific condition In this case , if the volume of the sound is larger than the second threshold, the ventilation volume is set to the first specified volume, and if the volume of the sound is smaller than the second threshold, the volume of ventilation becomes smaller as the volume of the sound becomes smaller. Ru reduce the. Therefore, according to the present invention, it is possible to suppress the unpleasant sensation due to the sound generated by the ventilation while suppressing the shortage of the ventilation amount.

Schematic diagram of the overall configuration of the ventilation system according to Embodiment 1 of the present invention Plan view of a house to which the ventilation system according to Embodiment 1 is applied The block diagram which shows the hardware constitutions of the ventilation device which concerns on Embodiment 1. FIG. 3 is a block diagram showing the hardware configuration of the control device according to the first embodiment. Block diagram showing the functional configuration of the ventilation system according to the first embodiment FIG. 3 is a diagram showing an example of information stored in the area storage unit in the first embodiment. The figure which shows the relationship between the intensity|strength of odor, the presence or absence of a person, and ventilation volume in Embodiment 1. The figure which shows the relationship between the sound volume and ventilation volume in Embodiment 1. FIG. 3 is a diagram showing an example of a notification image in the first embodiment. Flowchart showing the flow of presence/absence determination processing executed by the control device according to the first embodiment. The flowchart which shows the flow of the ventilation control process performed by the control apparatus which concerns on Embodiment 1. The block diagram which shows the function structure of the ventilation system which concerns on Embodiment 2 of this invention. FIG. 10 is a diagram showing an example of a temporal change in the loudness of the first type sound according to the second embodiment The figure which shows the example of the time change of the ventilation volume in Embodiment 2. The flowchart which shows the flow of the ventilation control process performed by the control apparatus which concerns on Embodiment 2. Schematic of the whole structure of the ventilation system in the 1st modification of this invention. Schematic of the whole structure of the ventilation system in the 2nd modification of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals.

(Embodiment 1)
A ventilation system 1 according to Embodiment 1 of the present invention will be described with reference to FIG. 1. The ventilation system 1 is a system that ventilates a ventilation target area. Ventilation means replacing the air in the area with the air outside the area in order to maintain or improve the air environment in the area to be ventilated. Hereinafter, the area to be ventilated will be referred to as a “ventilation area”.

  As shown in FIG. 1, the ventilation system 1 is installed in a house H. The house H is, for example, a so-called general detached house. The ventilation system 1 includes a plurality of ventilation devices 20a, 20b, ... for ventilating a ventilation area in the house H, a plurality of viewing devices 40a, 40b, ... viewed by a person, and a control device 50 for controlling the entire system. , Is provided. Further, the ventilation system 1 is a sensor that detects information about the environment of the ventilation area, that is, a plurality of sound sensors 31a, 31b,..., A plurality of odor sensors 32a, 32b,. 33b,...

  Each of these devices and each sensor are installed in the house H or in the premises of the house H, and are communicably connected via the home network N1. The home network N1 is, for example, a network conforming to ECHONET Lite. Further, each device and each sensor operate by receiving power supply from a commercial power source, a solar power generation facility, a power storage facility, etc., which are not shown.

  FIG. 2 shows a plan view of the house H. As shown in FIG. 2, the house H includes a living room, a dining room, a kitchen, a bedroom, a child room, a hallway, a corridor, a bathroom, a toilet, and other rooms and spaces on one floor. In the following, the living room, dining room and kitchen are collectively referred to as "LDK". These rooms and spaces are connected to each other by a door shown by hatching in FIG. Note that the house H may have other rooms and spaces on different floors in addition to the rooms or spaces shown in FIG. Each device and each sensor are installed in an appropriate place in such a room and space.

  The ventilation devices 20a, 20b,... Are facilities for ventilating the ventilation area in the house H. Each of the ventilation devices 20a, 20b,... Is, for example, a ventilation fan, a total heat exchanger, a counter arrow fan, a range hood, a bath dryer, or an intermediate mounting fan. Each of the ventilation devices 20a, 20b,... Is installed at a position where ventilation can be performed in the ventilation area such as the wall or ceiling of the house H. Each of the ventilation devices 20a, 20b,... May be a facility that sends air through a duct, or a facility that is directly attached to an outer wall and sends air without a duct. Is also good. Further, each of the ventilation devices 20a, 20b,... May have both the functions of air supply and exhaust, or may have the function of only one of air supply and ventilation.

  In the example of FIG. 2, ventilation devices 20a to 20e are installed in the living room, kitchen, bedroom, children's room, and bathroom, respectively. The ventilation devices 20a to 20e ventilate the respective installed areas. For example, the ventilation devices 20a, 20c, and 20d supply fresh air outdoors to the living room, bedroom, and children's room, respectively. In addition, the ventilation devices 20b and 20e respectively discharge the air in the kitchen and the bathroom to the outside. In this way, each of the ventilation devices 20a to 20e ventilates the ventilation area in which the device is installed, so that the entire house H is ventilated. Hereinafter, when the ventilation devices 20a, 20b,... Are referred to without distinction, they are collectively referred to as the ventilation device 20.

  As shown in FIG. 3, each of the ventilation devices 20 (20a, 20b,...) Has a control unit 21, a storage unit 22, a clock unit 23, a communication unit 24, and a ventilation unit 25. These units are connected via a bus 29.

  Although not shown, the control unit 21 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU is also called a central processing unit, a central processing unit, a processor, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor). In the control unit 21, the CPU reads out the programs and data stored in the ROM, and uses the RAM as a work area to integrally control the ventilation device 20.

  The storage unit 22 is a non-volatile semiconductor memory such as a flash memory, an EPROM (Erasable Programmable ROM), or an EEPROM (Electrically Erasable Programmable ROM), and plays a role as a so-called secondary storage device (auxiliary storage device). .. The storage unit 22 stores identification information for identifying the ventilation device 20, programs and data for communicating with the control device 50, and programs and data for controlling the ventilation unit 25.

  The clock unit 23 is a clock device that includes an RTC (Real Time Clock) and continues clocking while the ventilation device 20 is powered off.

  The communication unit 24 includes a communication interface for connecting to the home network N1 and communicating with the control device 50 via the home network N1. Specifically, the communication unit 24 acquires an operation command for the ventilation device 20 from the control device 50. The control unit 21 controls the ventilation unit 25 according to the received operation command to start or stop ventilation. In addition, the communication unit 24 notifies the control device 50 of the current ventilation volume of the ventilation unit 25.

  The ventilation unit 25 is a component for realizing the original function of the ventilation device 20, and functions as a ventilation unit that ventilates the ventilation area. More specifically, the ventilation unit 25 includes a fan, a motor, and a motor drive circuit, which are not shown. The motor drive circuit drives the motor based on the control data from the control device 50 received by the communication unit 24. As a result, the motor rotates the fan connected via the rotary shaft. When the fan rotates, the outside air is taken into the house H or the air inside the house H is discharged to the outside.

  The sound sensors 31a, 31b,... Are also called microphones and are sensors that detect sound. Sound is something that stimulates human hearing such as conversation, voice, music, noise, and noise. The sound sensors 31a, 31b,... Include a vibration detection unit that detects vibration of the air and a conversion unit that converts the detected vibration into an electric signal, and detect the loudness of the sound by a known method. The loudness of a sound is also called a sound pressure level and is expressed in a unit of decibel (dB).

  In the example of FIG. 2, sound sensors 31a to 31c are installed in the living room, bedroom, and child room, respectively. The sound sensors 31a to 31c detect sounds heard in the living room, bedroom, and children's room, respectively. The sounds detected by the sound sensors 31a to 31c include a living sound generated inside the house H and an environmental sound generated outside the house H. Hereinafter, when the sound sensors 31a, 31b,... Are referred to without distinction, they are collectively referred to as the sound sensor 31.

  The odor sensors 32a, 32b,... Are sensors for detecting odors. The odor is generated, for example, from food, smoke, drainage, pets, etc., and drifts in the air to stimulate a person's sense of smell. Odor includes odors, scents, odors, and the like. The odor sensors 32a, 32b,... Detect the intensity of odor in the kitchen by a well-known method such as a semiconductor type or a crystal oscillator type. The odor intensity is also called the odor level, and is represented by the concentration of the substance causing the odor in the air.

  In the example of FIG. 2, the odor sensor 32a is installed in the kitchen. The odor sensor 32a detects an odor generated during cooking in the kitchen, an odor generated from food and drink placed in the kitchen, and the like. In addition to the odor sensor 32a, the odor sensor 32b,... May be installed in the house H on a floor different from the floor shown in FIG. Hereinafter, when the odor sensors 32a, 32b,... Are referred to without distinction, they are collectively referred to as the odor sensor 32.

  The human presence sensors 33a, 33b,... Are human presence sensors that detect the presence of a person. The person is, for example, a resident or an owner of the house H. The human detection sensors 33a, 33b,... Are, for example, infrared sensors that detect whether or not a person is present in the surroundings by detecting a change in ambient temperature via infrared rays. Alternatively, the human presence sensors 33a, 33b,... May be image sensors that sense whether or not a person is present in the surroundings by capturing images of the surroundings and analyzing the captured images.

  In the example of FIG. 2, motion sensors 33a and 33b are installed in the living room and the bedroom, respectively. The presence sensors 33a and 33b detect whether or not a person is present in the living room and the bedroom, respectively. Hereinafter, when the human sensor 33a, 33b,... Are referred to without distinction, they are collectively referred to as the human sensor 33.

  Although not shown, the sound sensor 31 (31a, 31b,... ), the odor sensor 32 (32a, 32b,...), and the human sensor 33 (33a, 33b,...) , A communication interface and a readable/writable nonvolatile semiconductor memory. Each of these sensors is connected to the home network N1 via a communication interface, and transmits detection information indicating a detection result to the control device 50 via the home network N1.

  The viewing devices 40a, 40b,... Are devices viewed by a person. Each of the viewing devices 40a, 40b,... Is a device used by a person watching or listening, such as a television, an audio player, a boombox, or the like.

  In the example of FIG. 2, the viewing devices 40a and 40b are installed in the living room and the children's room, respectively. A person in the living room or the children's room can operate the operation unit to start or stop the operation of the viewing device 40a or the viewing device 40b. Hereinafter, when the viewing devices 40a, 40b,... Are referred to without distinction, they are collectively referred to as the viewing device 40.

  Although not shown, each of the viewing devices 40 (40a, 40b,...) Has a CPU, a ROM, a RAM, a communication interface, and a readable/writable nonvolatile semiconductor memory. The CPU controls the operation of the viewing device 40 by executing the control program stored in the ROM while using the RAM as the work memory. The CPU transmits operation information indicating whether the viewing device 40 is operating to the control device 50 via the home network N1.

  The control device 50 is an information collecting unit that collects information transmitted from each device installed in the house H via the home network N1. The control device 50 is, for example, a HEMS (Home Energy Management System) controller capable of integrally controlling each device installed in the house H. The control device 50 controls the ventilation amount of each of the plurality of ventilation devices 20 based on the information collected from each device.

  As shown in FIG. 4, the control device 50 includes a control unit 51, a storage unit 52, a user interface 53, a clock unit 54, a home communication unit 55, and an out-of-home communication unit 56. These respective units are connected via a bus 59.

  Although not shown, the control unit 51 includes a CPU, a ROM, and a RAM. The CPU is also called a central processing unit, central processing unit, processor, microprocessor, microcomputer or DSP. In the control unit 51, the CPU reads out the programs and data stored in the ROM, and uses the RAM as a work area to integrally control the control device 50.

  The storage unit 52 is, for example, a non-volatile semiconductor memory such as a flash memory, an EPROM, or an EEPROM, and plays a role as a so-called secondary storage device or an auxiliary storage device. The storage unit 52 stores programs and data used by the control unit 51 to perform various processes, and data generated or acquired by the control unit 51 performing various processes.

  The user interface 53 includes a display unit 57 and an input unit 58. The display unit 57 is a display device such as an LCD (Liquid Crystal Display) panel, an organic EL, and an LED (Light Emitting Diode). The input unit 58 is an input device such as a touch panel, a touch pad, a switch, and a push button. The user interface 53 receives an operation from the user via the input unit 58, and displays a display image via the display unit 57. The display unit 57 and the input unit 58 may be configured as a touch panel or a touch screen in which these are superposed on each other.

  The clock unit 54 is a clock device that includes an RTC and continues clocking even when the power supply of the control device 50 is off.

  The in-home communication unit 55 includes a communication interface for connecting to the in-home network N1 and communicating with devices in the house H via the in-home network N1. Under the control of the control unit 51, the home communication unit 55 communicates with each of the plurality of ventilation devices 20, the plurality of sensors 31, 32, 33, and the plurality of viewing devices 40 via the home network N1.

  The outside communication unit 56 is provided with a communication interface for connecting to a wide area network such as the Internet and for communicating with a device outside the house H via the wide area network.

  Next, the functional configuration of the ventilation system 1 will be described with reference to FIG. As shown in FIG. 5, the control device 50 functionally includes an information acquisition unit 510, a presence determination unit 520, a ventilation control unit 530, an input reception unit 550, and a notification unit 560. Each of these functions is realized by software, firmware, or a combination of software and firmware. The software and the firmware are described as programs and stored in the ROM or the storage unit 52. Then, in the control unit 51, the CPU realizes each function by executing the program stored in the ROM or the storage unit 52.

  For each of the plurality of ventilation areas, the information acquisition unit 510 includes first information indicating the loudness of the sound in the ventilation area, the odor intensity in the ventilation area, and whether or not a person exists in the ventilation area. And second information indicating at least one of them. The information acquisition unit 510 is realized by the control unit 51 cooperating with the in-home communication unit 55. The information acquisition unit 510 functions as an information acquisition unit.

  First, the information acquisition unit 510 determines whether the first information indicating the loudness of the sound in the first ventilation area, the odor intensity in the first ventilation area, and whether a person exists in the first ventilation area. Second information indicating at least one of whether or not to acquire. The first ventilation area is one of a plurality of ventilation areas in the house H, such as an LDK, a bedroom, a child room, and a bathroom. Hereinafter, the LDK will be described as an example of the first ventilation area.

  The information acquisition unit 510 acquires, as the first information, sound information indicating the loudness of the sound in the LDK. The sound in the LDK is a conversation inside the living room, a noise generated outside the living room and transmitted to the living room, or the like. The loudness of the sound in the LDK is detected by the sound sensor 31a installed in the living room.

  The information acquisition unit 510 acquires, as the second information, odor information indicating the intensity of odor in the LDK and presence/absence information indicating whether or not a person is present in the LDK. The odor in the LDK is, for example, an odor generated during cooking in the kitchen, an odor generated from food and drink placed in the kitchen, or the like. The odor intensity of the LDK is detected by the odor sensor 32a installed in the kitchen.

  Whether or not a person is present in the LDK is detected by the motion sensor 33a installed in the living room and the viewing device 40a. The human sensor 33a can directly detect the presence of a person when the person is within a range detectable by the human sensor 33a. In addition, when the viewing device 40a is operating, it is estimated that a person who is viewing the viewing device 40a is usually in the vicinity. Therefore, the information acquisition unit 510 acquires both the detection information by the human sensor 33a and the operation information of the viewing device 40a as presence/absence information indicating the presence/absence of a person in the LDK.

  Furthermore, the information acquisition unit 510 also indicates, for the second and third ventilation areas, at least one of the first information indicating the loudness of the sound, the intensity of the odor, and the presence or absence of a person. The second information and are acquired. Below, a bedroom and a child's room will be described as examples of the second and third ventilation areas, respectively.

  The information acquisition unit 510 acquires, as the first information in the second ventilation area, sound information indicating the volume of sound in the bedroom from the sound sensor 31b. In addition, the information acquisition unit 510 acquires presence/absence information indicating whether or not a person is present in the bedroom, as the second information in the second ventilation area, from the motion sensor 33b.

  The information acquisition unit 510 acquires, as the first information in the third ventilation area, sound information indicating the loudness of the sound in the child room from the sound sensor 31c. Further, the information acquisition unit 510 acquires, as the second information in the third ventilation area, presence/absence information indicating whether or not a person is present in the child room from the viewing device 40b.

  In addition, the information acquisition unit 510 acquires ventilation information indicating the current ventilation volume from each of the ventilation devices 20a to 20e. The information acquisition unit 510 includes detection information obtained by the sound sensors 31a to 31c, the odor sensor 32a, and the motion sensors 33a and 33b, operation information of the viewing devices 40a and 40b, and ventilation information of the ventilation devices 20a to 20e. And are acquired via the home network N1 and the home communication unit 55. Each sensor and each device regularly transmits the detection information, the operation information, or the ventilation information to the control device 50 at a predetermined cycle. The predetermined cycle is, for example, about 10 seconds to several tens of seconds. Alternatively, the information acquisition unit 510 transmits a request to each sensor and each device as necessary, and each sensor and each device transmits the detection information, the operation information, or the ventilation information to the control device 50 by a method of responding to this request. You may.

  The presence/absence determination unit 520 determines whether a person is present in the ventilation area based on the detection information acquired from the motion sensor 33 by the information acquisition unit 510 or the operation information acquired from the viewing device 40 by the information acquisition unit 510. Is determined. The presence/absence determination unit 520 is realized by the control unit 51. Presence determination unit 520 functions as presence determination means.

  More specifically, the presence determination unit 520 determines that a person is present in the LDK when the presence sensor 33a detects the presence of the person. The presence/absence determination unit 520 also determines that a person exists in the LDK even when the viewing device 40a is operating. In other words, the presence/absence determination unit 520 determines the LDK not only when the presence sensor 33a directly detects the presence of a person but also when the viewing device 40a indirectly detects the presence of a person. Determine that a person exists.

  On the other hand, the motion sensor 33b is installed in the bedroom, but the viewing device 40 is not installed. Therefore, the presence/absence determination unit 520 determines whether or not a person is present in the bedroom based only on whether or not a person is detected by the motion sensor 33b. Specifically, the presence determination unit 520 determines that a person is present in the bedroom when the presence sensor 33b detects the presence of the person.

  The viewing device 40b is installed in the child room, but the motion sensor 33 is not installed. Therefore, the presence/absence determination unit 520 determines whether or not a person is present in the child room based only on whether or not the viewing device 40b is in operation. Specifically, the presence/absence determination unit 520 determines that a person exists in the child room when the viewing device 40b is operating.

  As shown in FIG. 5, the control device 50 includes an area storage unit 590. The area storage unit 590 stores information regarding a plurality of ventilation areas. The area storage unit 590 is constructed in the storage area of the storage unit 52. The area storage unit 590 functions as an area storage unit.

  FIG. 6 shows an example of information stored in the area storage unit 590. As shown in FIG. 6, the area storage unit 590 stores the correspondence relationship between each of the plurality of ventilation areas and the devices and sensors installed in each area. Information on devices and sensors installed in a plurality of ventilation areas can be input by the operator via the input reception unit 550. Further, it is possible to use the result determined by the area determination unit 230 of the ventilation device 20 described later.

  Further, the area storage unit 590 stores a correspondence relationship between each of the plurality of ventilation areas and the loudness of the sound, the intensity of the odor, the presence or absence of a person, and the ventilation volume in each of the ventilation areas. The loudness of the sound, the intensity of the odor, and the ventilation amount are acquired from the sound sensor 31, the odor sensor 32, and the ventilation device 20 installed in the corresponding ventilation area. Further, the presence/absence of a person is determined by the presence/absence determination unit 520 based on the detection information by the human sensor 33 or the operation information of the viewing device 40. The area storage unit 590 stores the newly acquired information and updates the stored content whenever the information is newly acquired.

  Returning to the description of the functional configuration of the ventilation system 1 shown in FIG. The ventilation control unit 530 controls the ventilation amount of the plurality of ventilation devices 20 based on the sound information, the odor information, or the presence/absence information stored in the area storage unit 590. The ventilation control unit 530 communicates with each of the plurality of ventilation devices 20 via the in-home communication unit 55 and the in-home network N1, and instructs each of the plurality of ventilation devices 20 to start or stop ventilation as necessary. Send a command to adjust the ventilation rate. The ventilation control unit 530 is realized by the control unit 51 cooperating with the in-home communication unit 55. The ventilation control unit 530 functions as a ventilation control unit.

  The ventilation control unit 530 determines whether or not the second information acquired by the information acquisition unit 510 satisfies a specific condition. The second information is at least one of odor information indicating the intensity of odor in the ventilation area and presence/absence information indicating whether or not a person is present in the ventilation area. In addition, the specific condition is a condition for determining a method of controlling the ventilation amount of the ventilation device 20. The specific condition is satisfied when the odor intensity in the ventilation area is larger than the first threshold Th1 or when there is no person in the ventilation area.

  Specifically, the ventilation control unit 530 determines whether or not the odor intensity of the LDK, which is the first ventilation area, is greater than the first threshold Th1. The first threshold Th1 is a value corresponding to the intensity of the odor that becomes a boundary of whether or not a person feels uncomfortable, and is preset and stored in the ROM or the storage unit 52. Although there are individual differences in how odors are perceived, the first threshold Th1 generally corresponds to the strength that many people find uncomfortable when the odor intensity is greater than the first threshold Th1. Is set to a value

  The odor intensity of the LDK is detected by the odor sensor 32a installed in the kitchen and stored in the area storage unit 590. The ventilation control unit 530 compares the odor intensity stored in the area storage unit 590 with a preset first threshold Th1 to determine whether the odor intensity is greater than the first threshold Th1. judge.

  When it is determined that the odor intensity in the LDK is higher than the first threshold Th1 as a result of the determination, the ventilation control unit 530 determines that the ventilation device 20a installed in the LDK does not depend on the loudness of the sound in the LDK. Control the ventilation of 20b. The ventilation control unit 530 also controls the ventilation volume of the ventilation devices 20a and 20b installed in the LDK, regardless of the volume of the sound in the LDK, even when it is determined that there is no person in the LDK. To do. The ventilation control unit 530 refers to the result of the determination made by the presence determination unit 520 to determine whether or not a person is present in the LDK.

  Specifically, as shown in FIG. 7, the ventilation control unit 530 sets the ventilation amount of the ventilation devices 20a and 20b. As shown in FIG. 7, when no person exists in the LDK, the ventilation control unit 530 sets the ventilation amount of the ventilation devices 20a and 20b to the required amount that is the first specified amount. Further, even if a person is present in the LDK, if the odor intensity in the LDK is larger than the first threshold value Th1, the ventilation control unit 530 sets the ventilation volumes of the ventilation devices 20a and 20b at the first specified volume. Set to a certain required amount.

  The required amount is a ventilation amount required to ventilate the ventilation area, and the ambient sound, the odor, the presence or absence of a person, etc., which are defined for each of the plurality of ventilation devices 20 installed in the house H. The amount does not depend on the environment. The required amount of each ventilation device 20 is defined in advance according to the size, type, application, etc. of the ventilation area ventilated by each ventilation device 20. More specifically, the ventilation rate of the building is regulated by law so that the air volume of the entire building is changed to 0.5 times/hour, that is, half of the air in the house H is replaced per unit time. Therefore, the required amount of each ventilation device 20 is defined such that the sum of the required amounts of each ventilation device 20 corresponds to the required ventilation amount of the entire house H.

  If the person does not exist, it is not necessary to consider the comfort of the person in the first place. Therefore, when there is no person in the LDK, the ventilation control unit 530 sets the ventilation amount of the ventilation devices 20a and 20b to the required amount and ventilates the LDK as much as necessary.

  Furthermore, even if a person is present, if the odor intensity is larger than the first threshold value Th1, it is highly likely that the person feels uncomfortable due to the odor. Therefore, it is necessary to sufficiently ventilate the ventilation area to suppress the odor. There is. Therefore, when the intensity of odor in LDK is larger than the first threshold Th1, the ventilation control unit 530 sets the ventilation amount of the ventilation devices 20a and 20b to the required amount. Thereby, the ventilation control unit 530 sufficiently ventilates the air in the LDK.

  On the other hand, when the second information acquired by the information acquisition unit 510 does not satisfy the specific condition, the ventilation control unit 530 controls the ventilation volumes of the ventilation devices 20a and 20b according to the sound in the LDK. To do. The case where the second information does not satisfy the specific condition is, specifically, the case where the odor intensity in the LDK is smaller than the first threshold Th1 and a person exists in the LDK. The volume of the sound in the LDK is the volume of the environmental sound, daily life sound, etc. detected by the sound sensor 31a installed in the living room, and is stored in the area storage unit 590. When the second information does not satisfy the specific condition, the ventilation control unit 530 refers to the volume of the sound in the LDK stored in the area storage unit 590 and adjusts the ventilation amount of the ventilation devices 20a and 20b. ..

  FIG. 8 shows the relationship between the loudness of sound and the ventilation volume when the second information does not satisfy the specific condition. As shown in FIG. 8, the ventilation control unit 530 changes the control method of the ventilation devices 20a and 20b according to the volume of the sound in the LDK in order to suppress the discomfort caused by the ventilation sounds of the ventilation devices 20a and 20b. To do. The ventilation sound is a sound generated by ventilation of the ventilation devices 20a and 20b, such as a rotation sound of a fan or a blowing sound.

  More specifically, when the second information does not satisfy the specific condition, the ventilation control unit 530 determines that the volume of the sound in the LDK is larger than the second threshold Th2, and the ventilation of the ventilation devices 20a and 20b. Set the amount to the required amount. This required amount is the same as the required ventilation amount for ventilating the LDK, which is set when the second information satisfies the specific condition. The second threshold Th2 is a value corresponding to the volume of the sound that becomes the boundary of whether or not a person feels noisy. The second threshold Th2 is, for example, set to about 70 dB, which corresponds to the loudness of the operating noise of the vacuum cleaner, and is stored in the ROM or the storage unit 52 in advance.

  When the sound in the LDK is loud enough to make a person feel noisy, the ventilation sound of the ventilation devices 20a and 20b is small as compared with the surrounding sound, and therefore the ventilation sound hardly affects the person. Therefore, when the sound in the LDK is larger than the second threshold Th2, the ventilation control unit 530 sets the ventilation amount of the ventilation devices 20a and 20b to the necessary amount to sufficiently ventilate the air in the LDK.

  On the other hand, when the second information does not satisfy the specific condition and the volume of the sound in the LDK is smaller than the second threshold Th2, the ventilation control unit 530 causes the volume of the sound in the LDK to be small. The more the ventilation amount of the ventilation devices 20a and 20b is decreased. When the sound in the LDK becomes smaller, the proportion of the ventilation sound of the ventilation devices 20a and 20b in the sound in the LDK becomes higher, so that the ventilation sound is more likely to give discomfort to a person. Therefore, when the loudness of the sound in the LDK is smaller than the second threshold Th2, the ventilation control unit 530 reduces the ventilation volume below the required volume.

  More specifically, the ventilation control unit 530 sets the ventilation volume of the ventilation devices 20a and 20b to an amount that reduces the ventilation sound by a specified volume ΔL below the volume of the sound in the LDK. The prescribed size ΔL is a value for controlling the ratio of ventilation sound to ambient sound, is set in the unit of decibel (dB), and is stored in the ROM or the storage unit 52 in advance.

  When the loudness of the sound in the LDK is smaller than the second threshold value Th2, the ventilation control unit 530 uses the loudness of the sound in the LDK as a reference to reduce the ventilation sound by a predetermined loudness ΔL. Adjust the ventilation volume of 20a and 20b. As a result, the ventilation sounds of the ventilation devices 20a and 20b are drowned out by the surrounding sounds, so that the people in the LDK do not care.

  Further, as shown in FIG. 8, when the second information does not satisfy the specific condition, the ventilation control unit 530 determines that the volume of the sound in the LDK is smaller than the third threshold Th3, the ventilation device 20a, Set the ventilation volume of 20b to the minimum volume. The minimum amount is the amount specified for each of the plurality of ventilation devices 20 installed in the house H, and is the minimum value of the ventilation amount that can be set by each ventilation device 20. The minimum value may be 0 depending on the ventilation device 20. When the minimum value is 0, setting the ventilation volume to the minimum volume corresponds to stopping ventilation.

  The third threshold value Th3 is a value smaller than the second threshold value Th2, and is a value corresponding to the volume of the sound that becomes a boundary of whether or not a person cares. As an example, the third threshold Th3 is set to about 50 dB corresponding to the volume of a small voice or the operating sound of the air conditioner, and is stored in the ROM or the storage unit 52 in advance.

  When the sound in the LDK is so small that the person does not care about it, the ventilation sound of the ventilation devices 20a and 20b becomes dominant in the sound in the LDK, so that the ventilation sound is more likely to give discomfort to the person. . Therefore, when the sound in the LDK is smaller than the third threshold Th3, the ventilation control unit 530 sets the ventilation amount of the ventilation devices 20a and 20b to the minimum amount and reduces the ventilation sound as much as possible.

  The ventilation control unit 530 also executes such ventilation control processing executed for the LDK, which is the first ventilation area, for the bedroom, which is the second ventilation area, and the child room, which is the third ventilation area. However, the odor sensor 32 is not installed in the bedroom which is the second ventilation area and the child room which is the third ventilation area. Therefore, the ventilation control unit 530 does not execute the process of determining the intensity of the odor, and determines that the specific condition is satisfied when no person is present in the ventilation area.

  The bedroom, which is the second ventilation area, will be specifically described. When no person is present in the bedroom, the ventilation control unit 530 sets the ventilation volume of the ventilation device 20c installed in the bedroom to the required volume that is the first prescribed volume. This is because if there is no person in the bedroom, it is not necessary to consider the comfort of the person, and the bedroom can be ventilated as much as necessary. The ventilation control unit 530 refers to the result of the determination made by the presence determination unit 520 to determine whether or not a person is present in the bedroom.

  On the other hand, when a person is present in the bedroom, the ventilation control unit 530 controls the ventilation volume of the ventilation device 20c according to the sound detected by the sound sensor 31b installed in the bedroom. Specifically, as shown in FIG. 8, the ventilation control unit 530 reduces the ventilation amount of the ventilation device 20c as the volume of the sound in the bedroom is smaller. The method of controlling the ventilation amount is similar to the case where the odor intensity in the LDK is smaller than the first threshold Th1 and a person is present in the LDK.

  The same applies to the child room, which is the third ventilation area. When there is no person in the child room, the ventilation control unit 530 sets the ventilation amount of the ventilation device 20d installed in the child room to the required amount that is the first specified amount. On the other hand, when a person exists in the child room, the ventilation control unit 530 controls the ventilation volume of the ventilation device 20d according to the sound detected by the sound sensor 31c installed in the child room.

  When the ventilation volumes of the plurality of ventilation areas are adjusted in this manner, the ventilation volume of the entire house H may be insufficient. Therefore, when the sum of the ventilation amounts of the plurality of ventilation areas is smaller than the second specified amount, the ventilation control unit 530 determines, among the plurality of ventilation areas, the ventilation amount of at least one ventilation area in which no person exists. To increase.

  The second prescribed amount is a ventilation amount required for the entire house H and is an amount for replacing half the air in the house H per unit time. In other words, when the ventilation volume of the entire house H does not reach the required volume of the entire house H, the ventilation control unit 530 preferentially increases the ventilation volume of at least one ventilation area where no person exists. . Since the ventilation volume of the at least one ventilation area where the person does not exist is set to the first prescribed volume as described above, the ventilation control unit 530 causes the ventilation control unit 530 to detect the ventilation volume of the at least one ventilation area where the person does not exist. The ventilation volume is set to a larger volume than the first specified volume.

  The reason why the ventilation area where no person is present is prioritized is that if there is no person, comfort does not need to be considered. The ventilation control unit 530 refers to the determination result by the presence/absence determination unit 520, and transmits a command to increase the ventilation amount to the ventilation device 20 that ventilates at least one ventilation area in which it is determined that no person exists. To do. As a result, the ventilation volume of the entire house H is adjusted.

  Returning to the description of the functional configuration of the ventilation system 1 shown in FIG. In the control device 50, the notification unit 560 notifies the current ventilation state in the house H. The notification unit 560 displays the notification image shown in FIG. 9, for example, on the display unit 57 of the user interface 53. The notification unit 560 is realized by the control unit 51 cooperating with the display unit 57. The notification unit 560 functions as a notification unit.

  As shown in FIG. 9, the notification unit 560 notifies the current ventilation volume of the entire house H by turning on the LED. The information on the current ventilation volume is the sum of the ventilation volumes acquired by the information acquisition unit 510 from each of the plurality of ventilation devices 20.

  In addition, the notification unit 560 notifies whether the operation mode of the ventilation system 1 is ventilation priority or life priority. When the operation mode is life priority, the ventilation system 1 executes the ventilation control process of the ventilation control unit 530 described above to suppress the discomfort of the person due to the ventilation sound. On the other hand, when the operation mode is ventilation priority, the ventilation system 1 prioritizes ventilation without considering human comfort. By operating the input unit 58, the operator can select either ventilation priority or life priority.

  The input reception unit 550 receives the setting of the second threshold Th2 for switching whether or not to set the ventilation amount to the required amount. By operating the input unit 58, the operator can input the loudness of the noisy sound. The input receiving unit 550 sets the loudness of the sound thus input as the second threshold Th2. The input receiving unit 550 is realized by the control unit 51 cooperating with the input unit 58. The input receiving unit 550 functions as an input receiving unit.

  As shown in FIG. 9, the notification unit 560 displays the second threshold value Th2 accepted by the input acceptance unit 550 on the display unit 57 as a noise threshold value. The operator can adjust the second threshold Th2 to an optimum value according to the situation while referring to the noise threshold displayed on the display unit 57.

  Returning to the description of the functional configuration of the ventilation system 1 shown in FIG. The viewing device 40 (40a, 40b,...) Functionally includes an operation information transmission unit 410. The operation information transmission unit 410 transmits operation information indicating whether the viewing device 40 is operating to the control device 50 via the home network N1. The operation information transmitted by the operation information transmission unit 410 is acquired by the information acquisition unit 510 of the control device 50. The operation information transmission unit 410 is realized by the CPU of the viewing device 40 cooperating with the communication interface. The operation information transmission unit 410 functions as operation information transmission means.

  The ventilation device 20 (20a, 20b,...) Functionally includes a ventilation amount measuring unit 210, a ventilation information transmitting unit 220, an area determining unit 230, and a ventilation amount adjusting unit 240. Each of these functions is realized by the CPU of the control unit 21 executing a program stored in the ROM or the storage unit 22.

  The ventilation amount measuring unit 210 measures the ventilation amount. The ventilation amount is the amount of air ventilated by the ventilation device 20 per unit time. The ventilation amount measuring unit 210 measures the ventilation amount, for example, by measuring the rotation speed of a fan or a motor in the ventilation unit 25, or by measuring the air amount of the air blown by the ventilation unit 25 with an air volume sensor. To do. The air volume sensor may be provided in the ventilation device 20 or may be installed at an appropriate place in the house H. The ventilation amount measuring unit 210 is realized by the control unit 21 cooperating with the ventilation unit 25. The ventilation amount measuring unit 210 functions as a ventilation amount measuring means.

  The ventilation information transmission unit 220 transmits ventilation information indicating the ventilation amount measured by the ventilation amount measurement unit 210 to the control device 50 via the home network N1. The ventilation information transmitted by the ventilation information transmission unit 220 is acquired by the information acquisition unit 510 of the control device 50 and stored in the area storage unit 590. The ventilation information transmission unit 220 is realized by the control unit 21 cooperating with the communication unit 24. The ventilation information transmission unit 220 functions as ventilation information transmission means.

  The area determination unit 230 determines the other ventilation device 20, the sensor, and the viewing device 40 which are set in the ventilation area with the own device. Specifically, the area determination unit 230 emits radio waves with a power that does not exceed the wall that partitions the ventilation area. When the other ventilation device 20, the sensor or the viewing device 40 receives the emitted radio wave, it transmits a response to the ventilation device 20 that emitted the radio wave. The area determination unit 230 determines that the other ventilation device 20, the sensor, or the viewing device 40 that has obtained this response is set in the same ventilation area.

  The result determined by the area determination unit 230 is included in the ventilation information and transmitted to the control device 50 by the ventilation information transmission unit 220. The area determination unit 230 is realized by the control unit 21 cooperating with the communication unit 24. The area determination unit 230 functions as an area determination unit.

  The ventilation amount adjusting unit 240 receives the control command of the ventilation amount transmitted by the ventilation control unit 530 of the control device 50, and adjusts the ventilation amount according to the received control command. Specifically, the ventilation amount adjusting unit 240 changes the rotation speed of the fan in the ventilation unit 25 to a speed corresponding to the ventilation amount designated by the ventilation control unit 530. The ventilation amount adjusting unit 240 is realized by the control unit 21 cooperating with the communication unit 24 and the ventilation unit 25. The ventilation amount adjusting unit 240 functions as a ventilation amount adjusting means.

  The flow of processing executed in the control device 50 of the ventilation system 1 configured as above will be described with reference to the flowcharts shown in FIGS. 10 and 11.

  FIG. 10 shows the flow of presence/absence determination processing for determining whether or not a person is present in the LDK, which is the first ventilation area. The control unit 51 of the control device 50 executes the presence/absence determination process shown in FIG. 10 as necessary or periodically at a predetermined cycle. The control unit 51 functions as the presence/absence determination unit 520 while executing the presence/absence determination process.

  In the presence/absence determination process shown in FIG. 10, the control unit 51 first determines whether or not the presence of a person is detected by the motion sensor 33a installed in the living room (step S1). Specifically, the control unit 51 determines whether the latest detection information among the detection information repeatedly transmitted from the human sensor 33a indicates that the presence of a person is detected. As a result of the determination, when the latest detection information indicates that the presence of the person is detected, it is determined that the presence sensor 33a detects the presence of the person.

  When it is determined that the presence of a person is not detected by the motion sensor 33a (step S1; NO), the control unit 51 secondly determines whether or not the viewing device 40a installed in the living room is in operation. The determination is made (step S2). Specifically, the control unit 51 determines whether or not the latest operation information among the operation information repeatedly transmitted from the viewing device 40a indicates that the viewing device 40a is operating. . As a result of the determination, when the latest operation information indicates that the viewing device 40a is operating, it is determined that the viewing device 40a is operating.

  When it is determined that the viewing device 40a is in operation (step S2; YES), and when it is determined that the presence of a person is detected by the motion sensor 33a in step S1 (step S1; YES), the control unit. 51 determines that a person exists in the LDK (step S3). In other words, the control unit 51 may operate the viewing device 40a not only when the presence sensor 33a detects the presence of a person but also when the presence sensor 33a does not detect the presence of a person. For example, it is determined that a person exists in the LDK.

  On the other hand, when it is determined in step S2 that the viewing device 40a is not in operation (step S2; NO), the control unit 51 determines that no person exists in the LDK (step S4). In other words, the control unit 51 determines that a person does not exist in the LDK when it is determined that the presence of the person is not detected by the motion sensor 33a and the viewing device 40a is not in operation.

  In the bedroom, which is the second ventilation area, the motion sensor 33b is installed, but the viewing device 40 is not installed. Therefore, the control unit 51 omits step S2 in the presence determination process. The viewing device 40b is installed in the child room, which is the third ventilation area, but the motion sensor 33 is not installed. Therefore, the control unit 51 omits step S1 in the presence determination process. Further, neither the motion sensor 33 nor the viewing device 40 is installed in the bathroom which is the fourth ventilation area. Therefore, the control unit 51 does not execute the presence/absence determination process for the bathroom.

  FIG. 11 shows a flow of ventilation control processing executed by the control device 50. The control unit 51 of the control device 50 executes the ventilation control process shown in FIG. 11 as needed or at regular intervals. The control unit 51 functions as the ventilation control unit 530 while executing the ventilation control process.

  When the ventilation control process is started, the control unit 51 selects one ventilation area for controlling the ventilation amount from a plurality of ventilation areas in the house H (step S11). Hereinafter, a case where the LDK is selected as the ventilation area will be described as an example.

  When the LDK is selected as the ventilation area, the control unit 51 first determines whether or not a person exists in the LDK (step S12). Whether or not a person exists in the LDK is determined by the presence/absence determination processing shown in FIG. The control unit 51 refers to the result of the presence/absence determination process executed last for the LDK to determine whether or not a person exists in the LDK.

  When it is determined that a person is present in the LDK (step S12; YES), the control unit 51 secondly determines whether the odor intensity in the LDK is larger than the first threshold Th1 (step S12). S13). The size of the odor in the LDK is detected by the odor sensor 32a and stored in the area storage unit 590. The control unit 51 compares the odor intensity in the LDK with the first threshold Th1 and determines whether the odor is strong enough to cause discomfort to a person.

  When it is determined that there is no person in the LDK (step S12; NO), it is not necessary to consider the effect of the ventilation sound on the person. Therefore, the control unit 51 sets the ventilation amount of the ventilation devices 20a and 20b installed in the LDK to the required amount (step S14). More specifically, the control unit 51 transmits a command to the ventilation devices 20a and 20b via the in-home communication unit 55 and the in-home network N1 to set the ventilation volume to the required volume.

  Further, even when a person is present in the LDK, if it is determined that the odor intensity in the LDK is larger than the first threshold Th1 (step S13; YES), the person may feel uncomfortable due to the odor. Is high. Therefore, also in this case, the control unit 51 sets the ventilation amount of the ventilation devices 20a and 20b installed in the LDK to the required amount in step S14. As a result, the control unit 51 gives priority to sufficiently ventilating the ventilation area rather than suppressing the ventilation sound.

  On the other hand, when a person is present in the LDK and it is determined that the odor intensity in the LDK is smaller than the first threshold Th1 (step S13; NO), the control unit 51 determines that the sound in the LDK The process shifts to the size determination. The volume of the sound in the LDK is detected by the sound sensor 31a and stored in the area storage unit 590.

  Specifically, the control unit 51 determines whether or not the volume of the sound in the LDK is larger than the second threshold Th2 (step S15). The second threshold value Th2 is a threshold value for determining whether or not the volume of sound is a level at which the user feels noisy.

  When the volume of the sound in the LDK is larger than the second threshold Th2 (step S15; YES), the ventilation sound of the ventilation devices 20a and 20b is smaller than the surrounding sound, and therefore the ventilation sound affects the person. There is almost no. Therefore, the control unit 51 shifts the processing to step S14 and sets the ventilation amount of the ventilation devices 20a and 20b installed in the LDK to the required amount.

  On the other hand, when the volume of the sound in the LDK is smaller than the second threshold Th2 (step S15; NO), the control unit 51 further determines whether the volume of the sound in the LDK is smaller than the third threshold Th3. It is determined (step S16). The third threshold Th3 is a threshold for determining whether or not the volume of sound is at a level conscious of a person.

  When the volume of the sound in the LDK is smaller than the third threshold Th3 (step S16; YES), the proportion of the ventilation sounds of the ventilation devices 20a and 20b among the sounds in the LDK becomes large. Therefore, the control unit 51 sets the ventilation amount of the ventilation devices 20a and 20b installed in the LDK to the minimum amount (step S17). This suppresses the person from feeling uncomfortable due to the ventilation sound.

  Furthermore, when the volume of the sound in the LDK is smaller than the second threshold Th2 and larger than the third threshold Th3 (step S16; NO), the control unit 51 sets the ventilation volumes of the ventilation devices 20a and 20b to the LDK. It is set to an amount corresponding to the volume of the sound at (step S18). More specifically, the control unit 51 sets the ventilation volumes of the ventilation devices 20a and 20b so that the ventilation sound is more regulated than the sound volume in the LDK so that the ventilation sound does not become dominant in the sound in the LDK. The amount is set to be smaller by ΔL. This suppresses the person from feeling uncomfortable due to the ventilation sound.

  When the ventilation amount in the LDK is set in step S14, step S17, or step S18 in this way, the control unit 51 determines whether or not all ventilation areas in the house H have been selected (step S19).

  When all ventilation areas have not been selected (step S19; NO), the control unit 51 returns the process to step S11 and selects one new ventilation area that has not been selected in step S11. For example, after controlling the ventilation amount in the LDK, the control unit 51 selects one of the bedroom, the child room, and the bathroom as the ventilation area for controlling the ventilation amount next. And the control part 51 performs the process of step S12 to step S18 mentioned above about the selected ventilation area. In this way, for each ventilation area in the house H, the control unit 51 controls the ventilation amount of the ventilation device 20 installed in each ventilation area.

  When the bedroom or the child room is selected as the ventilation area, the odor sensor 32 is not installed in the bedroom or the child room, so the control unit 51 skips the process of step S13. Further, when the bathroom is selected as the ventilation area, since no sensor is installed in the bathroom, the control unit 51 always sets the ventilation amount of the ventilation device 20e installed in the bathroom to the required amount.

  Finally, when all ventilation areas have been selected (step S19; YES), the control unit 51 determines whether the ventilation volume of the entire house H is smaller than the required volume of the entire house H (step S19). S20). In other words, the control unit 51 determines whether or not the entire house H is in a state where the ventilation volume is insufficient as a result of adjusting the ventilation volume in each of the plurality of ventilation areas.

  When the ventilation volume of the entire house H is smaller than the required volume of the entire house H (step S20; YES), the control unit 51 increases the ventilation volume in order from the ventilation area where the person is absent (step S21). More specifically, if the ventilation volume of the entire house H is smaller than the required volume of the entire house H, the control unit 51 gives priority to the ventilation volume of the ventilation area in which it is determined that no person exists in step S12. Increase. After that, when the ventilation volume of the entire house H is still smaller than the required volume of the entire house H, the control unit 51 also increases the ventilation volume of the ventilation area where the person is present.

  On the other hand, when the ventilation volume of the entire house H is equal to or larger than the required volume of the entire house H (step S20; NO), there is no need to increase the ventilation volume, so the control unit 51 performs the process of step S21. Skip. With the above, the ventilation control process shown in FIG. 11 ends.

  As described above, in the ventilation system 1 according to the first embodiment, when at least one of the odor intensity and the presence/absence of a person in the ventilation area satisfies the specific condition, the volume of the sound in the ventilation area is large. Ventilation volume is controlled regardless of the level, and if at least one of the intensity of odor and the presence or absence of a person in the ventilation area does not satisfy a specific condition, the ventilation volume is changed according to the volume of the sound in the ventilation area. To control. By controlling the ventilation volume according to the volume of the sound, it is possible to prevent the person in the ventilation area from being aware of the ventilation sound. As a result, it is possible to suppress the discomfort caused by the ventilation sound, for example, the ventilation sound is noisy and the TV sound cannot be heard. At the same time, when a specific condition is satisfied, the ventilation volume is set to the required volume regardless of the loudness of the sound, so that the shortage of the ventilation volume can be suppressed.

  In particular, a building having high airtightness and heat insulation, which has been increasing in recent years, does not have excellent air permeability, and thus needs sufficient ventilation. The ventilation system 1 according to the first embodiment can sufficiently ventilate such a building while suppressing discomfort caused by ventilation noise.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.

  FIG. 12 shows a functional configuration of the ventilation system 1a according to the second embodiment. In the ventilation system 1a, the control device 50a functionally includes the information acquisition unit 510, the presence/absence determination unit 520, the ventilation control unit 530, the notification unit 560, the input reception unit 550, and the area storage unit 590. A sound identification unit 610, a prediction unit 620, a priority setting unit 630, and a sound storage unit 690 are provided.

  The information acquisition unit 510, the presence/absence determination unit 520, the notification unit 560, the input reception unit 550, and the area storage unit 590 are the same as those included in the control device 50 in the first embodiment. Further, the ventilation device 20, the sound sensor 31, the odor sensor 32, the human sensor 33, and the viewing device 40 are the same as those corresponding to the first embodiment. The description of the same configurations as those of the first embodiment will be omitted.

  The sound identifying unit 610 identifies whether the sound in each ventilation area detected by the sound sensors 31a to 31c is the first type sound or the second type sound. The first type of sound is a sound that a person generally wants to hear, such as a human voice or music. The first type of sound includes, for example, in-home conversation, television sound, and music from an audio player. The second type of sound is a sound that people generally do not want to hear, such as noise and noise. The second type of sound includes, for example, house noise, house noise, and ventilation sound of the ventilation device 20. The sound identification unit 610 is realized by the control unit 51. The sound identification unit 610 functions as a sound identification unit.

  The sound identification unit 610 analyzes the sounds detected by the sound sensors 31a to 31c based on a well-known algorithm. Specifically, the sound identifying unit 610 calculates a mel frequency cepstrum coefficient (MFCC) for each unit time section as a feature amount representing the feature of the detected sound. Then, the sound identification unit 610 uses a hidden Markov model (HMM), which is an acoustic model used in general speech recognition, to identify the type of sound from which the feature amount in each time period is output. Probabilistically estimate. Thereby, the sound identifying unit 610, for each of the sounds detected by the sound sensors 31a to 31c, a time section in which the probability of being the first type of sound is high and a time in which the probability of being the second type of sound is high. And the section are specified.

  The sound storage unit 690 stores information indicating the result identified by the sound identification unit 610. More specifically, the sound storage unit 690 stores information indicating whether the sound in the ventilation area is the first type sound or the second type sound in chronological order for each ventilation area. .. The sound storage unit 690 is constructed in the storage area of the storage unit 52. The sound storage unit 690 functions as a sound storage unit.

  The ventilation control unit 530, when the second information acquired by the information acquisition unit 510 satisfies a specific condition, sets the ventilation amount of the ventilation device 20 that ventilates the ventilation area to a required amount that is a predetermined amount. Set to. In other words, when the odor intensity in the ventilation area is larger than the first threshold Th1 or when a person is present in the ventilation area, ventilation control unit 530 determines whether the odor in the ventilation area is the same as in the first embodiment. Ventilation is controlled regardless of the loudness of the sound.

  On the other hand, when the second information does not satisfy the specific condition, the ventilation control unit 530 controls the ventilation amount according to the volume of the sound in the ventilation area. To be more specific, when the loudness of the sound in the ventilation area is larger than the second threshold Th2, the ventilation control unit 530 sets the ventilation volume to the required amount, and the loudness of the sound is the second threshold Th2. When it is smaller, the ventilation volume is reduced as the volume of the sound becomes smaller.

  When the loudness of the sound in the ventilation area is smaller than the second threshold Th2, the ventilation control unit 530 controls the ventilation amount of the ventilation device 20 in a different procedure according to the identification result by the sound identification unit 610. Specifically, the ventilation control unit 530 sets the ventilation volume of the ventilation device 20 to the ventilation of the ventilation device 20 when the sound identification unit 610 identifies the sound in the ventilation area as the first type of sound. The amount of the accompanying sound is set to be smaller than the sound in the ventilation area by the first amount. On the other hand, when the sound identification unit 610 identifies that the sound in the ventilation area is the second type of sound, the ventilation control unit 530 sets the ventilation volume of the ventilation device 20 according to the ventilation of the ventilation device 20. The volume of the generated sound is set to be smaller than the volume of the sound in the ventilation area by the second volume.

  The second magnitude is set to the same value as the prescribed magnitude ΔL in the first embodiment. In other words, when the sound in the ventilation area is identified as the second type of sound, the ventilation control unit 530 controls the ventilation amount in the same procedure as in the first embodiment. On the other hand, the first size is set to a value larger than the second size. In other words, the ventilation control unit 530, when the sound in the ventilation area is identified as the first type of sound, is more likely than when the sound in the ventilation area is identified as the second type of sound. , Greatly reduce ventilation.

  This is because it is desirable that a sound that a person wants to hear, such as a person's conversation or a television sound, can be heard clearly without being disturbed by the ventilation sound. The ventilation control unit 530 suppresses the ventilation sound by further reducing the ventilation amount when the sound that the person wants to hear is flowing in the ventilation area. As a result, it is possible to prevent the sound that the person wants to hear from becoming difficult to hear due to the ventilation sound.

  For each of the plurality of ventilation areas, the prediction unit 620 refers to the history of the sound information stored in the sound storage unit 690 and predicts the loudness of the first type sound after the specified time T1 from the present time. The specified time T1 is, for example, 1 hour or 2 hours, and is set in advance and stored in the ROM or the storage unit 52.

  FIG. 13 shows a time change of the loudness of the first type of sound in the LDK which is the first ventilation area. The graph shown in FIG. 13 is obtained by integrating the loudness of the first type of sound in a plurality of days in the past by time period. For example, when the family eats every Sunday at 19:00 in the evening, the first type of sound is loud because many conversations are made during that time. Thus, the loudness of the first type of sound can be used as an index of the amount of human activity in the ventilation area. The prediction unit 620 predicts a time zone in which the amount of human activity is high by predicting a time zone in which the first type of sound becomes loud. The prediction unit 620 is realized by the control unit 51. The prediction unit 620 functions as a prediction unit.

  Since it is not possible to increase the ventilation volume during times when the amount of human activity is high, in order to ventilate the required amount of air, it is necessary to ventilate a large amount of air before the amount of activity increases. Therefore, when the loudness of the first type of sound predicted by the prediction unit 620 is larger than the fourth threshold Th4 which is the specified threshold, the ventilation control unit 530 waits until the specified time T1 elapses from the present time. Increase ventilation between The fourth threshold Th4 is set to a value corresponding to the size of conversation of a person, and is stored in the ROM or the storage unit 52 in advance.

  For example, in FIG. 13, the loudness of the first type of sound exceeds the fourth threshold Th4 in the time zones P2 and P4. Therefore, in the time period P1 immediately before the time period P2 and the time period P3 immediately before the time period P4, the ventilation control unit 530 increases the ventilation amount more than the amount set by the ventilation control process described above. More specifically, the ventilation volume of the ventilation area is set to the required volume, the volume corresponding to the loudness of the sound in the ventilation area, or the minimum volume by the ventilation control process described above. The ventilation control unit 530 further increases the ventilation amount set in this way by a predetermined adjustment amount ΔM.

  Further, the ventilation control unit 530 adjusts the ventilation volume for each of the plurality of ventilation areas according to the actual value of the ventilation volume in the period before the current time and the predicted value of the ventilation volume in the period after the current time. To do. The period before the present time is specifically a period immediately before the present time, which is a period having a predetermined time length T2. The actual value of the ventilation amount in the period before the present time is the amount actually ventilated by the ventilation device 20, and is measured by the ventilation amount measuring unit 210 of the ventilation device 20. Further, the period after the current time is specifically a period immediately after the current time, which is a period having a predetermined time length T3. The predicted value of the ventilation volume in the period after the present time is predicted based on the history of the sound information stored in the sound storage unit 690.

  The ventilation control unit 530 compares, for each of the plurality of ventilation areas, the average of the actual value of the ventilation volume in the period before the present time and the predicted value of the ventilation volume in the period after the current time with the required amount for each ventilation area. To do. As a result, when the average of the actual value and the predicted value is smaller than the required amount, the ventilation control unit 530 increases the ventilation amount.

  FIG. 14 shows the change over time of the ventilation volume in the LDK which is the first ventilation area. As shown in FIG. 14, the ventilation volume in the LDK is smaller than the required volume in the period Q1. When it is determined that the average of the actual value and the predicted value of the ventilation amount has become smaller than the required amount during this period Q1, the ventilation control unit 530 gradually increases the ventilation amount. As a result, the ventilation control unit 530 avoids the shortage of the ventilation volume that continues for a long period of time. Further, in the period Q2 after the ventilation amount reaches the required amount, the ventilation control unit 530 sets the ventilation amount larger than the required amount. As a result, the ventilation control unit 530 compensates for the shortfall of the ventilation volume in the period Q1 with the increase in the period Q2.

  Returning to the description of the functional configuration of the ventilation system 1a shown in FIG. The priority setting unit 630 sets a priority for each of the plurality of ventilation areas based on the result identified by the sound identifying unit 610. The priority is an index for determining which ventilation area of the plurality of ventilation areas is to be increased when the ventilation volume of the entire house H is insufficient.

  The priority setting unit 630 refers to the history of the sound information stored in the sound storage unit 690, and the sound sensor 31 detects the first type of sound in the past period of a predetermined length. The length of time is calculated for each of the multiple ventilation areas. Then, the priority setting unit 630 sets a higher priority to the ventilation area as the time when the first type of sound is detected is longer. For example, when the conversation frequency in the LDK is high, the priority setting unit 630 sets the LDK to a high priority. In this way, the priority represents the amount of human activity in each ventilation area. The priority setting unit 630 is realized by the control unit 51. The priority setting unit 630 functions as a priority setting unit.

  When the ventilation volume of the entire house H is insufficient, the ventilation control unit 530 increases the ventilation volume according to the priority set by the priority setting unit 630. First, when the sum of the ventilation amounts of the plurality of ventilation areas is smaller than the second specified amount, the ventilation control unit 530 determines that at least one ventilation area of the plurality of ventilation areas in which no person exists. The ventilation volume is increased by a predetermined first volume.

  If the sum of the ventilation volumes of the plurality of ventilation areas is still smaller than the second specified volume after increasing the ventilation volume of the at least one ventilation area in which no person is present, the ventilation control unit 530 secondly The ventilation volume is increased in order of the priority set by the priority setting unit 630. Specifically, the ventilation control unit 530 performs ventilation in order from the ventilation area with the lowest priority among the plurality of ventilation areas until the sum of the ventilation volumes of the plurality of ventilation areas becomes larger than the second specified amount. The amount is increased by a second predetermined amount.

  As described above, when the ventilation volume of the entire house H is insufficient, the ventilation control unit 530 first increases the ventilation volume of the ventilation area in which no person exists, and then from the ventilation area in which the activity volume of the person is small. Increase ventilation in sequence. As a result, it is possible to avoid increasing the ventilation volume of the ventilation area having a high use frequency as much as possible, and thus it is possible to suppress the discomfort of the person due to the ventilation sound.

  The flow of ventilation control processing executed in the control device 50a of the ventilation system 1a configured as described above will be described with reference to the flowchart shown in FIG. The control unit 51 of the control device 50a executes the ventilation control process shown in FIG. 15 as needed or periodically at a predetermined cycle.

  When the ventilation control process is started, the control unit 51 executes the processes of step S11 to step S18 shown in FIG. More specifically, the control unit 51 selects one from a plurality of ventilation areas, and determines the ventilation amount of the ventilation device 20 that ventilates the selected ventilation area by determining the presence/absence of a person, the intensity of odor, and the sound. Control according to size.

  In step S18, the control unit 51 controls the ventilation amount by different procedures depending on whether the sound in the selected ventilation area is the first type sound or the second type sound. Specifically, when the sound in the ventilation area is identified as the sound of the first type, the control unit 51 determines that the volume of the ventilation sound is smaller than the volume of the sound in the ventilation area by the first volume. Set the ventilation volume to a smaller volume. On the other hand, when the sound in the ventilation area is identified as the second type of sound, the control unit 51 makes the volume of the ventilation sound smaller by the second magnitude than the volume of the sound in the ventilation area. Set the ventilation volume to

  When the ventilation amount is controlled in this way, the control unit 51 refers to the history of the sound information stored in the sound storage unit 690, and then refers to the sound of the first type after the specified time T1 from the current time in the selected ventilation area. Is predicted to be greater than the fourth threshold Th4 (step S31). In other words, the control unit 51 determines whether or not the activity amount of the person in the selected ventilation area is predicted to increase after the specified time T1.

  When it is predicted that the loudness of the first type sound after the specified time T1 from the present time is larger than the fourth threshold value Th4 (step S31; YES), the control unit 51 sets the ventilation volume of the selected ventilation area to It is increased by a predetermined adjustment amount ΔM (step S32). Specifically, the control unit 51 further increases the ventilation volume of the selected ventilation area more than the volume set in step S11 to step S18. As a result, the control unit 51 secures the ventilation volume in advance before the activity amount of the person becomes large and the ventilation volume is required to be suppressed.

  On the other hand, when it is predicted that the loudness of the first type sound after the specified time from the present time is smaller than the fourth threshold value Th4 (step S31; NO), the control unit 51 performs the process of step S32. skip.

  Subsequently, the control unit 51 adjusts the ventilation amount according to the actual value and the predicted value of the ventilation amount of the selected ventilation area (step S33). Specifically, the control unit 51 compares the average of the actual value of the ventilation volume in the period before the current time and the predicted value of the ventilation volume in the period after the current time with the ventilation volume required for the selected ventilation area. To do. As a result of the comparison, when the average of the actual value and the predicted value is smaller than the required ventilation amount, the control unit 51 increases the ventilation amount. In this way, the control unit 51 dynamically changes the ventilation volume according to the actual value and the predicted value so that the ventilation volume of the selected ventilation area does not become insufficient.

  When the ventilation amount is adjusted in this way, the control unit 51 determines whether or not all ventilation areas in the house H have been selected (step S34). When all ventilation areas have not been selected (step S34; NO), the control unit 51 returns the process to step S11, and selects one new ventilation area that has not been selected in step S11. And the control part 51 performs the process of the above-mentioned step S12 to step S18 and step S31 to step S33 about the selected ventilation area. In this way, for each ventilation area in the house H, the control unit 51 controls the ventilation amount of the ventilation device 20 installed in each ventilation area.

  Finally, when all the ventilation areas have been selected (step S34; YES), the control unit 51 determines whether the ventilation volume of the entire house H is smaller than the required volume of the entire house H (step S34). S35). In other words, the control unit 51 determines whether or not the entire house H is in a state where the ventilation volume is insufficient as a result of adjusting the ventilation volume in each of the plurality of ventilation areas.

  When the ventilation volume of the entire house H is smaller than the required volume of the entire house H (step S35; YES), the control unit 51 increases the ventilation volume of the ventilation area where the person is absent (step S36). More specifically, the control unit 51 increases the ventilation amount of at least one ventilation area for which the presence/absence determination unit 520 has determined that a person does not exist by the first amount.

  When the ventilation amount of the ventilation area where the person is absent is increased, the control unit 51 determines again whether or not the ventilation amount of the entire house H is smaller than the required amount of the entire house H (step S37). When the ventilation volume of the entire house H is smaller than the required volume of the entire house H (step S37; YES), the control unit 51 increases the ventilation volume in order from the ventilation area having the lowest priority (step S38). The priority is an index indicating the amount of human activity in each ventilation area, which is set based on the result identified by the sound identification unit 610. The control unit 51 increases the ventilation amount by the second amount in order from the ventilation area where the activity amount of the person is small. As a result, it is possible to avoid increasing the ventilation volume in the ventilation area that is frequently used.

  On the other hand, when it is determined that the ventilation volume of the entire house H is equal to or larger than the required volume of the entire house H (step S35; NO, step S37; NO), it is not necessary to increase the ventilation volume, and therefore the control is performed. The unit 51 skips subsequent processing. With the above, the ventilation control process shown in FIG. 15 ends.

  As described above, in the ventilation system 1a according to the second embodiment, the sound in the ventilation area is the sound that the person wants to hear, such as conversation and music, or the sound that the person does not want to hear, such as noise and noise. Identify which is. When the sound in the ventilation area is the sound that the person wants to hear, the ventilation system 1a reduces the ventilation amount more than when the sound in the ventilation area is the sound that the person does not want to hear. In addition, the ventilation system 1a predicts the activity amount of a person and adjusts the ventilation time so that the ventilation amount is small when the sound in the ventilation area is a sound that the person wants to hear, and the ventilation system 1a Adjust the order of ventilation between. As a result, the person in the ventilation area can concentrate on the desired sound such as conversation or music without being disturbed by the ventilation sound, and the comfort is improved.

(Modification)
Although the embodiments of the present invention have been described above, various modifications and applications can be made in carrying out the present invention.

  For example, in the above-described embodiment, the input receiving unit 550 receives the second threshold Th2 input by the operator operating the input unit 58. However, the input receiving unit 550 may receive the input of the voice of the operator and set the received voice volume as the second threshold Th2. Alternatively, the control device 50, 50a may include a speaker that emits a sound, and when setting the second threshold Th2, the sound emitted from the speaker may be gradually increased. In this case, the operator operates the input unit 58 when he/she feels that the louder sound becomes louder. Then, the input receiving unit 550 sets, as the second threshold value Th2, the loudness of the sound emitted when the input unit 58 is operated.

  In the above embodiment, the sound identifying unit 610 identifies whether the sound in each ventilation area is the first type sound or the second type sound by using the analysis method of the voice recognition. At this time, the sound identification unit 610 may use information obtained by sparse signal analysis such as non-negative matrix factorization (NMF). Further, since it suffices to identify the type of sound over a long-term span, the sound identifying unit 610 may exclude a sudden sound such as a buzzer or a horn from the targets of identification.

  In the above embodiment, the control device 50a includes the sound identification unit 610. However, in the present invention, the sound sensor 31 includes the sound identification unit 610, and it is determined whether the sound detected by the sound sensor 31 is the first type sound or the second type sound. 31 may identify itself. Further, in the above-described embodiment, at least one of the sound sensor 31, the odor sensor 32, and the human sensor 33, which are installed in various places of the house H, is connected to the ventilation device 20, the viewing device 40, or the control device 50. , 50a may be provided.

  Further, the ventilation control unit 530 ventilates the ventilation area when the sound identification unit 610 identifies whether the sound in the ventilation area is the first type sound or the second type sound. The ventilation of this ventilation area may be stopped by controlling 20. By stopping ventilation, noise outside the house and noise from entering the house can be suppressed, so that the accuracy of the sound identification unit 610 can be improved.

  In the above-described embodiment, the control devices 50 and 50a have the display unit 57 and the input unit 58. However, in the present invention, the control device 50, 50a does not include the display unit 57 and the input unit 58, and even if an external terminal different from the control device 50, 50a functions as the display unit 57 and the input unit 58. good. In this case, the control devices 50 and 50a communicate with the terminal via the in-home communication unit 55 via Wi-Fi (registered trademark), Wi-SUN (registered trademark), wired LAN, or the like. Through such wireless or wired communication, the control device 50, 50a receives the input information input in the terminal from the terminal, and transmits the display information to be displayed in the terminal to the terminal.

  In the above embodiment, the case where the control devices 50 and 50a are installed in the house H has been described. However, in the present invention, a device having the same function as the control devices 50 and 50a may be installed outside the house H. FIG. 16 shows an example of the ventilation system 1b in this case. In the ventilation system 1b shown in FIG. 16, a router 91 is installed in the house H instead of the control devices 50 and 50a. The router 91 is a device that communicates with the server 90 via the outside network N2, and is, for example, a broadband router. The server 90 is a server that provides resources in cloud computing, for example. The outside network N2 is a wide area network such as the Internet. In this case, the router 91 and the server 90 cooperate to play the role of the control devices 50 and 50a.

  Further, the ventilation device 20 may include the functions of the control devices 50 and 50a. FIG. 17 shows an example of the ventilation system 1c in this case. In the ventilation system 1c shown in FIG. 17, at least one of the plurality of ventilation devices 20a, 20b,... Has the functions of the control devices 50, 50a in addition to the essential function including the ventilation unit 25. The ventilation device 20 having the functions of the control devices 50 and 50a communicates with the sound sensor 31, the odor sensor 32, the motion sensor 33, the viewing device 40, and another ventilation device 20 via the home network N1, and the above-described. It plays the role of the control device 50, 50a.

  In the above embodiment, the house H has been described as an example of the target to which the ventilation systems 1, 1a, 1b, 1c are applied. However, in the present invention, the target to which the ventilation systems 1, 1a, 1b, 1c are applied is not limited to a general house such as the house H, but may be an apartment house, a facility, a building, a factory, or the like. ..

  In the above-described embodiment, in the control unit 51 of the control device 50, 50a, the CPU executes the program stored in the ROM or the storage unit 52, so that the information acquisition unit 510, the presence/absence determination unit 520, and the ventilation control unit 530. , The input reception unit 550, the notification unit 560, the sound identification unit 610, the prediction unit 620, and the priority setting unit 630. However, in the present invention, the control unit 51 may be 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. When the control unit 51 is dedicated hardware, each function of each unit may be realized by individual hardware, or the functions of each unit may be collectively realized by single hardware.

  In addition, a part of the functions of each unit may be realized by dedicated hardware and the other part may be realized by software or firmware. In this way, the control unit 51 can realize each function described above by hardware, software, firmware, or a combination thereof.

  By applying an operation program that defines the operation of the control device 50, 50a according to the present invention to a computer such as an existing personal computer or an information terminal device, the computer is caused to function as the control device 50, 50a according to the present invention. It is also possible.

  In addition, a method of distributing such a program is arbitrary, and for example, a computer-readable recording medium such as a CD-ROM (Compact Disk ROM), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card is used. It may be stored and distributed, or may be distributed via a communication network such as the Internet.

  The present invention allows various embodiments and modifications without departing from the broad spirit and scope of the present invention. Further, the above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications made within the scope of the claims and within the scope of the meaning of the invention equivalent thereto are regarded as within the scope of the present invention.

  INDUSTRIAL APPLICATION This invention can be suitably employ|adopted for a ventilation system etc.

1, 1a, 1b, 1c ventilation system, 20, 20a, 20b, 20c, 20d, 20e ventilation device, 21 control unit, 22 storage unit, 23 clock unit, 24 communication unit, 25 ventilation unit, 29 bus, 31, 31a , 31b, 31c sound sensor, 32, 32a, 32b odor sensor, 33, 33a, 33b human sensor, 40, 40a, 40b viewing device, 50, 50a control device, 51 control unit, 52 storage unit, 53 user interface, 54 timekeeping unit, 55 home communication unit, 56 outside communication unit, 57 display unit, 58 input unit, 59 bus, 90 server, 91 router, 210 ventilation amount measuring unit, 220 ventilation information transmitting unit, 230 area determination unit, 240 Ventilation amount adjustment unit, 410 operation information transmission unit, 510 information acquisition unit, 520 presence determination unit, 530 ventilation control unit, 550 input reception unit, 560 notification unit, 590 area storage unit, 610 sound identification unit, 620 prediction unit, 630 priority setting unit, 690 sound storage unit, H house, N1 home network, N2 outside network

Claims (14)

A control device for controlling the ventilation volume of a plurality of ventilation devices,
A first information indicating the size of the sound in each of the plurality of areas which are ventilated by the plurality of ventilator, the presence of a person in each of the strength and the plurality of areas of odor in each of said plurality of areas Second information indicating at least one of presence and absence, and information acquisition means for acquiring
For each of the plurality of areas, when the second information satisfies a specific condition, the ventilation amount is controlled to a first specified amount, and the second information does not satisfy the specific condition. In this case, if the volume of the sound is larger than a second threshold, the ventilation volume is set to the first prescribed volume, and if the volume of the sound is smaller than the second threshold, the volume of the sound is large. Ventilation control means for decreasing the ventilation volume as the
When the sum of the ventilation volumes of the plurality of areas is smaller than a second prescribed volume, the ventilation control unit increases the ventilation volume of at least one area in which the person is not present, of the plurality of areas. , Control device. The information acquisition unit acquires, as the second information, odor information indicating the intensity of the odor in each of the plurality of areas ,
The specific condition is met when the odor intensity is greater than a first threshold,
The control device according to claim 1. The information acquisition unit acquires, as the second information, presence/absence information indicating whether or not the person exists in each of the plurality of areas,
The specific condition is satisfied when the presence/absence information indicates that the person does not exist,
The control device according to claim 1. The information acquisition unit acquires, as the presence/absence information, operation information indicating whether or not a viewing device provided in each of the plurality of areas is operating,
When the viewing device is operating, further comprises presence/absence determining means for determining that the person exists in an area in which the viewing device is operating among the plurality of areas .
The control device according to claim 3. Input acceptance means for accepting an input of the second threshold value,
The control device according to any one of claims 1 to 4. Sound identifying means for identifying whether the sound in each of the plurality of areas is a first type sound or a second type sound,
The control device according to any one of claims 1 to 5 . The ventilation control means, in the case where the second information in any area of the plurality of areas does not satisfy the specific condition, the sound in the area of the first by the sound discrimination means when it is identified as a type of sound, the first by an amount smaller amount than the size of the sound loudness that occurs with the ventilation of the area in the area, the ventilation of the area set, when it is identified as the sound in the area is the second type of sound by the sound identification unit, the size of the sound caused by the ventilation of the area than the size of the sound in the area Also set the ventilation volume of the area to an amount that is reduced by the second magnitude,
The first size is greater than the second size,
The control device according to claim 6 . For each of the plurality of areas, a prediction unit that predicts the loudness of the first type of sound after a specified time from the present time is further provided,
If the loudness of the sound of the first type predicted by the predicting means is larger than a specified threshold value for each of the plurality of areas , the ventilation control means until the specified time elapses from the present time. While increasing the ventilation volume,
The control device according to claim 6 or 7 . Further comprising a priority setting means for setting a priority for each of the plurality of areas based on the result identified by the sound identifying means,
The ventilation control means, if the sum of the ventilation of the plurality of areas is smaller than the second prescribed amount, until said sum is greater than said second prescribed amount, of the plurality of areas, the priority Ventilation volume is increased by a predetermined amount in order from a low ventilation area.
The control device according to any one of claims 6 to 8 . The ventilation control means, for each of the plurality of areas, according to the actual value of the ventilation amount in the period before the present time, and the predicted value of the ventilation amount in the period after the present time, the ventilation amount Adjust,
The control device according to any one of claims 1 to 9 . To any one of claims 1 to 10 and a control device according, pre SL and a plurality of ventilation devices, a ventilation system.   A ventilation system comprising the plurality of ventilation devices,
  A ventilation system, wherein at least one of the plurality of ventilation devices comprises the control device according to any one of claims 1 to 10. A first information indicating the size of the sound in each of the plurality of areas of the ventilation target, of the whether people each strength and the plurality of areas of odor in each of the plurality of areas are present And a second information indicating at least one,
For each of the plurality of areas, when the second information satisfies a specific condition, by controlling the ventilation amount in the first prescribed amount, the second information does not satisfy the specific condition In this case, if the volume of the sound is larger than a second threshold, the ventilation volume is set to the first prescribed volume, and if the volume of the sound is smaller than the second threshold, the volume of the sound is large. Is smaller, the ventilation volume is reduced ,
The ventilation method which increases the ventilation volume of at least one area in which the person does not exist among the plurality of areas when the sum of the ventilation volumes of the plurality of areas is smaller than a second prescribed amount . Computer,
A first information indicating the size of the sound in each of the plurality of areas of the ventilation target, of the whether people each strength and the plurality of areas of odor in each of the plurality of areas are present Second information indicating at least one, and information acquisition means for acquiring
For each of the plurality of areas, when the second information satisfies a specific condition, by controlling the ventilation amount in the first prescribed amount, the second information does not satisfy the specific condition In this case, if the volume of the sound is larger than a second threshold, the ventilation volume is set to the first prescribed volume, and if the volume of the sound is smaller than the second threshold, the volume of the sound is large. Is smaller, the ventilation control means for reducing the ventilation volume ,
When the sum of the ventilation volumes of the plurality of areas is smaller than a second prescribed volume, the ventilation control unit increases the ventilation volume of at least one area in which the person is not present, of the plurality of areas. , Program.

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