WO2023203686A1

WO2023203686A1 - Controller and ventilation system

Info

Publication number: WO2023203686A1
Application number: PCT/JP2022/018305
Authority: WO
Inventors: 維哉川村; 広嗣友松
Original assignee: 三菱電機株式会社
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2023-10-26

Abstract

This ventilation system has an environment detection device, a ventilation device, and a controller. The environment detection device detects the concentration of carbon dioxide in a room. The ventilation device ventilates the room. The controller is provided with a wireless communication unit and a main control unit. The wireless communication unit communicates wirelessly with the environment detection device and acquires the concentration from the environment detection device. The main control unit controls the ventilation device on the basis of the concentration acquired from the environment detection device.

Description

Controller and ventilation system

The present disclosure relates to a controller that controls a ventilation device, and a ventilation system that includes the controller and the ventilation device.

Conventionally, a ventilation system is known in which a ventilation device is equipped with a carbon dioxide sensor that detects the concentration of carbon dioxide in a room (see, for example, Patent Document 1). The ventilation device disclosed in Patent Document 1 includes a carbon dioxide sensor in a passage within the main body for discharging air to the outside. The carbon dioxide sensor is connected by wire to a controller, and the controller controls the ventilation device based on the detection results of the carbon dioxide sensor.

Japanese Patent Application Publication No. 2018-119752

A carbon dioxide sensor placed inside a ventilation system makes it possible to detect the concentration of carbon dioxide inside the ventilation system, but the concentration of carbon dioxide inside the ventilation system is based on the concentration of carbon dioxide at the location where a person is in the room. does not necessarily match. Therefore, there has been a demand for air conditioning that is appropriate for the air quality in the area where people are located indoors.

Furthermore, in conventional environmental systems, the carbon dioxide sensor is connected to the controller by wire, so wiring work is required at the time of installation. Furthermore, installing a ventilation system equipped with a carbon dioxide sensor may be costly.

The present disclosure has been made in order to solve the above-mentioned problems, and provides a controller that enables air conditioning according to the air quality in the area where people are located indoors, reducing the workload and cost at the time of introduction. and ventilation systems.

The controller according to the present disclosure includes a wireless communication unit that performs wireless communication with an environment detection device that detects a concentration of carbon dioxide in a room and acquires the concentration from the environment detection device, and a ventilation device that ventilates the room. and a main control section that performs control based on the concentration obtained from the environment detection device.

A ventilation system according to the present disclosure includes an environment detection device that detects the concentration of carbon dioxide in a room, a ventilation device that ventilates the room, and wireless communication with the environment detection device to acquire the concentration from the environment detection device. and a controller that controls the ventilation device based on the obtained concentration.

According to the controller and ventilation system according to the present disclosure, the controller acquires the indoor carbon dioxide concentration from the environmental sensing device through wireless communication. The controller then controls the ventilation device based on the concentration. Therefore, the ventilation system can perform air conditioning according to the air quality in the area where a person is located in the room. Furthermore, it is possible to reduce the burden of wiring work and reduce costs when introducing a ventilation system.

1 is a block diagram illustrating a ventilation system according to Embodiment 1. FIG. FIG. 2 is a schematic diagram showing an example of indoor installation of a ventilation device, an air conditioner, a controller, and a carbon dioxide sensor according to the first embodiment. FIG. 2 is a schematic diagram for explaining a ventilation device in Embodiment 1. FIG. FIG. 2 is a block diagram illustrating a configuration example of a controller according to Embodiment 1. FIG. FIG. 3 is a diagram illustrating first environment information displayed by the display unit in Embodiment 1. FIG. FIG. 6 is a diagram illustrating second environment information displayed by the display unit in the first embodiment. 1 is a diagram illustrating a hardware configuration of a controller according to Embodiment 1. FIG. 5 is a flowchart illustrating the flow of ventilation processing by the ventilation system according to the first embodiment. FIG. 2 is a block diagram illustrating a ventilation system according to a second embodiment. FIG. 2 is a block diagram showing a configuration example of a controller according to Embodiment 2. FIG. 3 is a diagram illustrating a hardware configuration of a controller according to a second embodiment. FIG. 7 is a flowchart illustrating the flow of ventilation processing by the ventilation system according to Embodiment 2. FIG.

Hereinafter, a controller and a ventilation system according to an embodiment will be described in detail with reference to the drawings.

Embodiment 1.
FIG. 1 is a block diagram illustrating a ventilation system according to a first embodiment. The ventilation system 100 includes a ventilation device 1, an air conditioner 2, a controller 3, and a carbon dioxide sensor 4. FIG. 2 is a schematic diagram showing an example of indoor installation of a ventilation device, an air conditioner, a controller, and a carbon dioxide sensor according to the first embodiment. The ventilation device 1 is installed indoors and ventilates the room. It is preferable that the ventilation device 1 is a total heat exchange type ventilation device, and hereinafter, in the first embodiment, the ventilation device 1 will be described as a total heat exchange type ventilation device.

FIG. 3 is a schematic diagram for explaining the ventilation device in Embodiment 1. The ventilation device 1 includes a first ventilation blower 10A, a second ventilation blower 10B, and a total heat exchanger 11 inside a housing 1H. The white arrow in FIG. 3 indicates the direction of air flow. Further, each of the broken line and the dashed-dotted line indicates a path through which air flows. As shown by the broken line in FIG. 3, the first ventilation blower 10A guides outside air OA into the ventilation device 1, and sends out the led outside air OA into the room as supply air SA. The second ventilation blower 10, as shown by the dashed line in FIG. 3, guides indoor air as return air RA to the ventilation device 1, and sends the guided return air RA into the room as exhaust EA. The total heat exchanger 11 exchanges heat between the outside air OA drawn into the ventilation device 1 by the ventilation blower 10 and the return air RA. As a result, when the temperature of the outside air OA is lower than the temperature of the return air RA, the outside air OA is warmed and sent into the room as the supply air SA. On the other hand, the return air RA is cooled and sent outside as exhaust air EA.

The ventilation device 1 in the first embodiment may be provided with a ventilation concentration sensor 12 that detects the concentration of carbon dioxide in the return air RA within the ventilation device 1. The ventilation concentration sensor 12 is an example of a ventilation concentration detection device that detects the concentration of carbon dioxide in the return air RA that has flowed into the ventilation apparatus 1. The ventilation device 1 may be provided with an outside temperature/humidity sensor 13 that detects the temperature and humidity of the outside air OA introduced into the ventilation device 1. Further, the ventilation device 1 may be provided with a supply air temperature sensor 14 that detects the temperature of the supply air SA into the room. The outside temperature/humidity sensor 13 is an example of an outside temperature/humidity detection device that detects the temperature and humidity of outside air OA flowing into the ventilation system 1 . The supply air temperature sensor 14 is an example of a supply air temperature detection device that detects the temperature of the supply air SA.

Referring back to FIGS. 1 and 2. The air conditioner 2 performs air conditioning of indoor air. That is, the air conditioner 2 adjusts both or one of indoor temperature and humidity. The air conditioner 2 includes an indoor unit 20 and an outdoor unit 21. The indoor unit 20 includes an indoor blower (not shown) inside a casing forming an outer shell, and indoor air is sucked into the indoor unit 20 by the indoor blower and then blown out. The indoor unit 20 and the outdoor unit 21 are connected by refrigerant piping (not shown), and refrigerant circulates inside. The air sucked into the indoor unit 20 exchanges heat with the refrigerant that has exchanged heat with outside air in the outdoor unit 21, and then is blown into the room, thereby air-conditioning the room.

The controller 3 controls the ventilation device 1 and the air conditioner 2. In the first embodiment, the controller 3 controls the ventilation device 1 and the outdoor unit 21 via the indoor unit 20. Further, in the first embodiment, the controller 3 transmits a control signal for controlling the ventilation device 1, the indoor unit 20, and the outdoor unit 21 to the indoor unit 20 through wired communication. However, the controller 3 may transmit the control signal to the indoor unit 20 by wireless communication.

The controller 3 may directly control the ventilation device 1. In this case, the controller 3 may transmit a control signal for controlling the ventilation device 1 to the ventilation device 1 via wired communication. Alternatively, the controller 3 may transmit the control signal to the ventilator 1 by wireless communication. When controlling the ventilation device 1 directly, the controller 3 may directly control the indoor unit 20 or may control the indoor unit 20 via the ventilation device 1.

The carbon dioxide sensor 4 detects the concentration of carbon dioxide in the room. The carbon dioxide sensor 4 performs wireless communication with the controller 3 and transmits the detected concentration to the controller 3. Note that an application program that links the controller 3 and the carbon dioxide sensor 4 is installed in the controller 3 and the carbon dioxide sensor 4. The carbon dioxide sensor 4 transmits the detection result to the controller 3 according to the application program. The controller 3 processes the detection results obtained from the carbon dioxide sensor 4 according to the application program. Carbon dioxide sensor 4 is portable. The carbon dioxide sensor 4 is an example of an environment detection device that obtains, by measurement or the like, a value that is an index indicating the indoor environmental condition.

The controller 3 controls the ventilation device 1 and the air conditioner 2 based on the concentration obtained from the carbon dioxide sensor 4. The controller 3 will be explained in detail below. FIG. 4 is a block diagram showing a configuration example of the controller according to the first embodiment. The controller 3 includes an input section 30 , a wireless communication section 31 , a clock section 32 , a main control section 33 , and a display section 34 . The input unit 30 is, for example, a button or a touch panel, and accepts input instructions from the user. The wireless communication unit 31 performs wireless communication with the carbon dioxide sensor 4 and periodically acquires detection results from the carbon dioxide sensor 4. The clock section 32 measures time.

The main control unit 33 controls both or one of the ventilation device 1 and the air conditioner 2 based on instructions input to the input unit 30. If the concentration acquired by the wireless communication unit 31 is equal to or higher than the first threshold concentration during the first time period, the main control unit 33 sets the ventilation air volume, which is the air volume by the ventilation device 1, to the first ventilation air volume or higher. The ventilation device 1 is controlled as follows. That is, the main control unit 33 transmits a control signal instructing the ventilation air volume to be equal to or higher than the first ventilation air volume to the ventilation device 1 via the indoor unit 20, and the ventilation device 1 performs ventilation in accordance with the control signal. Increase the air volume to the 1st ventilation air volume or higher. Note that the first time is predetermined, and is, for example, 7 minutes. The first threshold concentration is predetermined, and is, for example, 750 [ppm], 800 [ppm], 1000 [ppm], or 1400 [ppm]. Even if the first threshold concentration can be changed among 750 [ppm], 800 [ppm], 1000 [ppm], 1400 [ppm], etc. by inputting to the controller 3 via the input unit 30, etc. good. The first ventilation air volume is predetermined, and is, for example, the upper limit of the ventilation air volume by the ventilation device 1. Note that when the first ventilation air volume is set to the upper limit ventilation air volume, the main control unit 33 controls the ventilation device 1 to set the ventilation air volume to the first ventilation air volume.

In addition, the following problems may occur due to an increase in ventilation air volume. That is, indoor air whose temperature and/or humidity have been adjusted by the air conditioner 2 is sent outside due to an increase in the ventilation air volume, which may reduce user comfort. In order to prevent such a situation, the main control unit 33 may change the control content of the air conditioner 2 while the ventilation air volume of the ventilation device 1 is equal to or higher than the first ventilation air volume. Specifically, when the air conditioner 2 is performing heating operation, the main control unit 33 may control the air conditioner 2 to make the temperature higher than the temperature set by the user. For example, when the user inputs into the controller 3 an instruction for heating operation at a set temperature of 22 [°C], the main control unit 33 instructs the air conditioner 2 to perform heating operation to set the temperature to 23 to 24 [°C]. You can also have it executed.

Now, when the concentration of carbon dioxide in the room is equal to or higher than the first threshold concentration during the first time, the main control unit 33 sets the ventilation air volume by the ventilation device 1 to the first ventilation air volume or higher, so that the ventilation will be promoted, and indoor air quality will be improved more quickly. However, depending on the indoor environment, such as when a large amount of carbon dioxide is generated indoors, air quality may not be improved quickly. Even in such a case, the main control unit 33 of the first embodiment performs the following processing in order to quickly improve the air quality. If the concentration detected by the carbon dioxide sensor 4 is equal to or higher than the first threshold concentration during the second time period, the main control unit 33 controls the ventilation device 1 to make the ventilation air volume equal to or higher than the first ventilation air volume. In this state, the indoor unit 20 is controlled so that the adjusted air volume is equal to or higher than the first adjusted air volume. Here, the adjusted air volume refers to the air volume from the indoor unit 20. The second time is longer than the first time and is predetermined. The second time is, for example, 15 minutes.

If the concentration detected by the carbon dioxide sensor 4 is equal to or higher than the first threshold concentration during the first or second time period, the main control unit 33 causes the air conditioner 2 to perform a process of stirring the indoor air. You may run it. Specifically, the main control unit 33 may change the direction of the air from the indoor unit 20. For example, the main control unit 33 may adjust the direction of a louver (not shown) so that the air is blown diagonally downward or downward from the indoor unit 20. Alternatively, the main control unit 33 may rotate the louver and change the orientation of the louver from the vertical direction over time. Note that the louver is for controlling the direction of the wind from the indoor unit 20, and is provided at the air outlet from the indoor unit 20. The air agitation process by the indoor unit 20 can eliminate the imbalance in the distribution of carbon dioxide indoors.

After the main control unit 33 controls the ventilation device 1 to make the ventilation air volume equal to or higher than the first ventilation air volume, the main control unit 33 continues for a third time after the concentration of carbon dioxide becomes less than the second threshold concentration. When the concentration is less than the second threshold concentration, the ventilation device 1 is controlled to reduce the ventilation air volume to the second ventilation air volume or less. The third time is predetermined. The third time may be equal to or different from the first time, and is shorter than the second time. The third time is, for example, 7 minutes. The second threshold concentration is predetermined and is equal to or lower than the first threshold concentration, and is, for example, 750 [ppm]. However, the second threshold concentration is less than or equal to the first threshold concentration. The second ventilation air volume is predetermined, is smaller than the first ventilation air volume, and is, for example, the lower limit of the ventilation air volume by the ventilation device 1. Note that when the second ventilation air volume is set to the lower limit ventilation air volume, the main control unit 33 controls the ventilation device 1 to set the ventilation air volume to the second ventilation air volume.

If the concentration of carbon dioxide is lower than the second threshold concentration and the adjusted air volume by the indoor unit 20 is equal to or higher than the first adjusted air volume for the third continuous time, the main control unit 33 controls: The indoor unit 20 may be controlled so that the adjusted air volume is set to the set adjusted air volume. Alternatively, the main control unit 33 may control the indoor unit 20 to adjust the indoor temperature based on the set temperature, or may control the indoor unit 20 to adjust the indoor humidity based on the set humidity. Good too. Accordingly, the main control unit 33 may change the adjusted air volume. In addition, the main control unit 33 may control the indoor unit 20 so that the adjusted air volume is equal to or less than a predetermined second adjusted air volume. Here, the set adjusted air volume is the adjusted air volume that the user inputs into the controller 3 via the input unit 30. Furthermore, the set temperature is the temperature that the user inputs to the controller 3 via the input unit 30, and the set humidity is the humidity that the user inputs to the controller 3 via the input unit 30.

The main control unit 33 continuously controls the ventilation air volume for a third time when the concentration obtained by the wireless communication unit 31 is less than the third threshold concentration instead of when the concentration is less than the second threshold concentration. The ventilation device 1 may be controlled so that the ventilation air volume is equal to or less than the second ventilation air volume. The third threshold concentration is predetermined and is lower than the second threshold concentration, for example, 500 [ppm] or less.

When the concentration of carbon dioxide is less than the third threshold concentration and when the adjusted air volume by the indoor unit 20 is equal to or higher than the first adjusted air volume, the main control unit 33 causes the adjusted air volume to become the set adjusted air volume. The indoor unit 20 may also be controlled. Alternatively, the main control unit 33 may control the indoor unit 20 to adjust the indoor temperature based on the set temperature, or may control the indoor unit 20 to adjust the indoor humidity based on the set humidity. Good too. In addition, the main control unit 33 may control the indoor unit 20 so that the adjusted air volume is equal to or less than a predetermined second adjusted air volume.

The display unit 34 displays environmental information indicating the indoor environmental condition or guidance information for improving the environmental condition on the screen according to instructions from the main control unit 33. The environment information includes the following first environment information and second environment information. The first environmental information is information indicating the magnitude relationship between the concentration detected by the carbon dioxide sensor 4 and the first threshold concentration. The second environmental information is information indicating the time course of the concentration detected by the carbon dioxide sensor 4. The environment information will be described in detail below with reference to FIGS. 5 and 6.

FIG. 5 is a diagram illustrating the first environment information displayed by the display unit in the first embodiment. In FIG. 5, the first threshold concentration is 750 [ppm]. The direction pointed by the white arrow in FIG. 5 indicates the time direction, and FIG. 5 shows a case where the indoor carbon dioxide concentration changes from less than the first threshold concentration to more than the first threshold concentration. The starting point of the white arrow in FIG. 5 shows the first environmental information when the indoor carbon dioxide concentration is less than the first threshold concentration, and the position pointed to by the white arrow shows The first environmental information is shown when the first environmental information is equal to or higher than the first threshold concentration.

As shown in FIG. 5, when the concentration of carbon dioxide is 740 [ppm], which is less than the first threshold concentration, the display unit 34 changes the color of the text indicating the concentration of carbon dioxide to the color of the text indicating other contents. The background color of the text indicating the density is the same as the background color of the text indicating other contents. Note that the other contents include the contents of the indoor environmental condition other than the concentration of carbon dioxide, the contents input to the controller 3, and the like, for example, "indoor 27.0 degrees Celsius" and "settings" in FIG. Temperature: 19.0°C.”

As shown in FIG. 5, when the concentration of carbon dioxide is 750 [ppm], which is equal to or higher than the first threshold concentration, the display unit 34 displays the color of the text indicating the concentration of carbon dioxide and the color of the text indicating the concentration. Each of the background colors is inverted from the color described above if the concentration of carbon dioxide was less than a first threshold concentration. That is, the display unit 34 displays the color of the text indicating the concentration of carbon dioxide in the same color as the background color of the text indicating other content, and the background color of the text indicating the concentration is the same as the color of the text indicating other content. Expressed the same as. By displaying the first environmental information as shown in FIG. 5 on the display unit 34, the user can quickly and easily recognize the indoor air quality.

FIG. 6 is a diagram illustrating the second environment information displayed by the display unit in the first embodiment. The horizontal axis in FIG. 4 represents time, and the vertical axis represents the concentration of carbon dioxide detected by the carbon dioxide sensor 4. In FIG. 6, the first threshold concentration is 800 [ppm], and the second threshold concentration is 750 [ppm]. The display unit 34 may display dashed lines on the screen that indicate each of the first threshold density and the second threshold density in FIG. 6 . Note that the display unit 34 may indicate each of the first threshold concentration and the second threshold concentration using a straight line, a dashed-dotted line, a dashed-two dotted line, or the like instead of the broken line in FIG.

In FIG. 6, the concentration of carbon dioxide reaches the first threshold concentration of 800 [ppm] at time t1, and continues to rise from time t1 to time t2, and is equal to or higher than the first threshold concentration. Assuming that the time from time t1 to time t2 is the first time, as described above, at time t2, the main control unit 33 controls the ventilation device 1 so that the ventilation air volume is equal to or greater than the first ventilation air volume. After time t2, the concentration of carbon dioxide decreases, and at time t3, the concentration of carbon dioxide is the first threshold concentration. If the time from time t1 to time t3 is the second time or more, the main control unit 33 sets the ventilation air volume of the ventilation device 1 to the first ventilation air volume or more at the time when the second time has passed from time t1. In this state, the indoor unit 20 is controlled so that the adjusted air volume is equal to or higher than the first adjusted air volume. At time t4, the concentration of carbon dioxide is the second threshold concentration of 750 [ppm]. After time t4, the concentration of carbon dioxide is less than the second threshold concentration. Assuming that the time from time t4 to time t5 is a third time, at time t5, the main control unit 33 controls the ventilation device 1 so that the ventilation air volume becomes equal to or less than the second ventilation air volume. In this case, if the adjusted air volume is equal to or higher than the first adjusted air volume at time t5, the main control unit 33 controls the indoor unit 20 so that the adjusted air volume is set to the set adjusted air volume, the second adjusted air volume, or the like.

The time or elapsed time indicating each point in FIG. 6 may or may not be displayed on the display unit 34. The dashed-dotted lines indicating each time point shown in FIG. 6 may or may not be displayed by the display unit 34. Note that the display unit 34 may represent each time point using a straight line, a broken line, a two-dot chain line, or the like instead of the one-dot chain line.

Next, the guidance information displayed by the display unit 34 will be explained. The guidance information includes the following first to fourth guidance information. The first guidance information is information that guides the user to open both or one of the windows and doors in the room, such as textual information such as "Please open the window for ventilation." or prompting to open the window. Mark et al. The main control unit 33 controls the display unit 34 to display first guidance information if the concentration detected by the carbon dioxide sensor 4 is higher than the first threshold concentration during the first guidance necessity determination time. Good too. The first guidance necessity determination time is longer than the first time or longer than the second time.

The second guidance information is information that prompts cleaning of the filter in the ventilation system, for example, text information such as "The filter is dirty. Please clean it." or filter cleaning. It is a mark etc. that encourages the following. The main control unit 33 controls the display unit 34 to display second guidance information if the concentration detected by the carbon dioxide sensor 4 is higher than the first threshold concentration during the second guidance necessity determination time. Good too. The second guidance necessity determination time is longer than the first time or longer than the second time. The second guidance necessity determination time may be equal to or different from the first guidance necessity determination time.

The third guidance information is information that prompts repair or inspection of the carbon dioxide sensor 4. The third guidance information is, for example, text information such as "Please check whether there is a problem with the sensor." or a mark that urges repair or inspection of the carbon dioxide sensor 4. The main control unit 33 may control the display unit 34 to display the third guide information in the following cases. The main control unit 33 determines whether there is a correlation between the concentration of carbon dioxide detected by the ventilation concentration sensor 12 and the concentration of carbon dioxide detected by the carbon dioxide sensor 4. If the main control unit 33 determines that there is no correlation between the concentration obtained by the ventilation concentration sensor 12 and the concentration obtained by the carbon dioxide sensor 4, the main control unit 33 causes the third guide information to be displayed. The display unit 34 may also be controlled.

The fourth guide information is information that prompts a change in the position of the carbon dioxide sensor 4. The fourth guide information is, for example, text information such as "The sensor is not in an appropriate position, so please move it." or a mark that urges the carbon dioxide sensor 4 to be moved. The main control unit 33 may acquire position information indicating the position of the carbon dioxide sensor 4, and may control the display unit 34 to display the fourth guide information based on the position information. Note that the main control unit 33 can obtain position information using the following three methods. First, the first method will be explained. The carbon dioxide sensor 4 detects not only the concentration of carbon dioxide but also both or one of indoor temperature and humidity. The main control unit 33 controls the indoor unit 20 to blow air into the room. The main control unit 33 then acquires position information indicating the position of the carbon dioxide sensor 4 based on both or one of the temperature and humidity detected by the carbon dioxide sensor 4 before and after air is blown from the indoor unit 20 . For example, the main control unit 33 acquires position information indicating the position of the carbon dioxide sensor 4 from changes in the temperature detected by the carbon dioxide sensor 4 before and after air is blown from the indoor unit 20 .

Next, the second method will be explained. Here, it is assumed that three or more radio wave communication devices are arranged indoors. Each radio wave communication device receives radio waves from the carbon dioxide sensor 4 through wireless communication. One of the three or more radio wave communication devices may be included in the controller 3, and in this case, the wireless communication section 31 corresponds to the one radio wave communication device. The ventilation system 100 may include three or more controllers 3, and each controller 3 may include a respective radio wave communication device. In this case, the wireless communication section 31 of each controller corresponds to each radio wave communication device. The main control unit 33 acquires position information indicating the position of the carbon dioxide sensor 4 based on the intensity of radio waves received from the carbon dioxide sensor 4 by each of the three or more radio wave communication devices.

Next, the third method will be explained. The main control unit 33 acquires position information indicating the position of the carbon dioxide sensor 4 based on the intensity of the radio waves received by the wireless communication unit 31 from the carbon dioxide sensor 4 and the following identifying information. The identification information is information indicating the position of the carbon dioxide sensor 4 in the horizontal direction, and is, for example, information based on GPS (Global Positioning System). The main control unit 33 can estimate the position of the carbon dioxide sensor 4 from the floor based on the intensity of the radio wave and the identification information.

The main control unit 33 may change the first threshold density based on the position information. This will be explained in detail below. Below, the position where carbon dioxide is arranged may be described as an arrangement position. The main control unit 33 sets the first threshold concentration to be different depending on whether the height of the arrangement position from the floor is a first height or a second height different from the first height. Good too. Note that the floor surface refers to the indoor floor surface. Here, it is assumed that the second height is larger than the first height. Since carbon dioxide is heavier than oxygen, nitrogen, etc. contained in the air, it is thought that the lower the position from the floor, the higher the carbon dioxide concentration. Therefore, the main control unit 33 sets the first threshold concentration when the height from the floor of the arrangement position is the first height to the first threshold concentration when the height from the floor of the arrangement position is the second height. The concentration may be higher than the first threshold concentration. That is, the main control unit 33 may increase the first threshold concentration as the arrangement position is lower from the floor surface. Alternatively, the main control unit 33 may increase the first threshold density by a predetermined amount when the height of the arrangement position is less than or equal to the threshold height.

The display unit 34 displays each of first environment information, second environment information, first guide information, second guide information, third guide information, and fourth guide information for each predetermined display area on the screen. May be displayed. In addition, the display unit 34 displays all or part of the first environment information, second environment information, first guide information, second guide information, third guide information, and fourth guide information in the same display area on the screen. may be displayed at different times. For example, the display unit 34 displays each of the first environment information and the second environment information in a predetermined first display area on the screen at different timings, and displays the first guide information, the second guide information, and the third guide information. The information and the fourth guide information may each be displayed on the screen in a second display area different from the first display area at different timings. The portion of the display section 34 that displays the first environment information is an example of a first environment display section. The portion of the display section 34 that displays the second environment information is an example of a second environment display section. The portion of the display section 34 that displays the first guidance information is an example of a first guidance display section. The portion of the display section 34 that displays the second guidance information is an example of a second guidance display section. The portion of the display section 34 that displays the third guidance information is an example of a third guidance display section. The portion of the display section 34 that displays the fourth guidance information is an example of a fourth guidance display section.

Hereinafter, the hardware configuration of the controller 3 according to the first embodiment will be described. FIG. 7 is a diagram illustrating the hardware configuration of the controller according to the first embodiment. The controller 3 includes a processor 50, a memory 51, a wireless communication interface circuit 52, a clock device 53, a first input interface circuit 54, an input device 55, a first output interface circuit 56, a second output interface circuit 57, and a display device 58. include. Note that the processor 50, the memory 51, the wireless communication interface circuit 52, the clock device 53, the first input interface circuit 54, the first output interface circuit 56, and the second output interface circuit 57 are connected to each other by a bus 59. The processor 50 is, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The memory 51 is, for example, ROM (Read Only Memory) or RAM (Random Access Memory). The clock device 53 is, for example, an RTC (Real Time Clock). The input device 55 is, for example, a button or a touch panel, and is connected to the processor 50, the memory 51, etc. via the first input interface circuit 54 and the bus 59. The display device 58 is, for example, a liquid crystal display or a CRT (Cathode Ray Tube), and is connected to the processor 50, the memory 51, etc. via the second output interface circuit 57 and the bus 59. The indoor unit 20 is connected to the first output interface circuit 56 . Note that the ventilation device 1 may be connected to the first output interface circuit 56 together with the indoor unit 20 or instead of the indoor unit 20.

The functions of the input section 30 can be realized by the input device 55 and the first input interface circuit 54. The functions of the wireless communication section 31 can be realized by the wireless communication interface circuit 52. The function of the timekeeping section 32 can be realized by a timekeeping device 53. The functions of the main control section 33 can be realized by the processor 50, the memory 51, and the first output interface circuit 56. The functions of the display section 34 can be realized by a display device 58 and a second output interface circuit 57. Note that the controller 3 may transmit a control signal to the indoor unit 20 or the ventilation device 1 etc. by wireless communication. Contains a communication interface circuit. The controller 3 may transmit a control signal to one of the indoor unit 20 and the ventilation device 1 by wired communication, and transmit the control signal to the other by wireless communication. In this case, the controller 3 Along with the first output interface circuit 56, other wireless communication interface circuits are included. The function of the clock unit 32 may be realized by software using the processor 50 and the memory 51. The clock unit 32 may measure time by receiving time information indicating the time from the outside. In this case, the function of the timer 32 can be realized by a communication interface circuit that receives information from the outside.

In addition to the above, all or part of the functions of the controller 3 may be realized by dedicated hardware such as a CPLD (Complex Programmable Logic Device) or an FPGA (Field Programmable Gate Array).

Hereinafter, with reference to FIG. 8, the flow of ventilation processing by the ventilation system 100 according to the first embodiment will be described. FIG. 8 is a flowchart illustrating the flow of ventilation processing by the ventilation system according to the first embodiment. In step S1, the wireless communication unit 31 of the controller 3 acquires the concentration of carbon dioxide from the carbon dioxide sensor 4. In step S2, the main control unit 33 determines whether the concentration acquired by the wireless communication unit 31 in step S1 is equal to or higher than the first threshold concentration. When the concentration acquired by the wireless communication unit 31 in step S1 is less than the first threshold concentration (step S2: NO), the ventilation system 100 moves the process to step S9.

When the concentration acquired by the wireless communication unit 31 in step S1 is equal to or higher than the first threshold concentration (step S2: YES), the main control unit 33 determines that the concentration equal to or higher than the first threshold concentration is equal to or higher than the first threshold concentration in step S3. It is determined whether or not the above information has been obtained continuously. If the concentration equal to or higher than the first threshold concentration has not been continuously obtained for the first time or longer (step S3: NO), the ventilation system 100 returns the process to step S1. If the concentration equal to or higher than the first threshold concentration is continuously obtained for the first time or longer (step S3: YES), in step S4 the main control unit 33 determines whether the ventilation air volume is equal to or higher than the first ventilation air volume. Determine whether or not.

If the ventilation air volume is equal to or greater than the first ventilation air volume (step S4: YES), the ventilation system 100 moves the process to step S6. If the ventilation air volume is less than the first ventilation air volume (step S4: NO), in step S5, the ventilation device 1 increases the ventilation air volume to the first ventilation air volume or more based on the control signal from the controller 3. In step S6, the main control unit 33 determines whether a concentration equal to or higher than the first threshold concentration has been continuously obtained for a second time or longer. If the concentration equal to or higher than the first threshold concentration is not continuously obtained for the second time period or more (step S6: NO), the ventilation system 100 returns the process to step S1. If the concentration equal to or higher than the first threshold concentration is continuously obtained for the second time or longer (step S6: YES), in step S7 the main control unit 33 determines whether the adjusted air volume is equal to or higher than the first adjusted air volume. Determine whether or not.

If the adjusted air volume is equal to or greater than the first adjusted air volume (step S7: YES), the ventilation system 100 returns the process to step S1. If the adjusted air volume is less than the first adjusted air volume (step S7: NO), the indoor unit 20 increases the adjusted air volume to the first adjusted air volume or higher based on the control signal from the controller 3 in step S8. After the process in step S8, the ventilation system 100 returns the process to step S1.

In step S9, the main control unit 33 determines whether the concentration acquired by the wireless communication unit 31 in step S1 is less than the second threshold concentration. If the concentration acquired by the wireless communication unit 31 in step S1 is equal to or higher than the second threshold concentration (step S9: NO), the ventilation system 100 returns the process to step S1. If the concentration acquired by the wireless communication unit 31 in step S1 is less than the second threshold concentration (step S9: YES), in step S10 the main control unit 33 determines that the concentration less than the second threshold concentration is It is determined whether or not the above information has been obtained continuously. If the concentration below the first threshold concentration is not continuously obtained for the third time or more (step S10: NO), the ventilation system 100 returns the process to step S1. If the concentration below the first threshold concentration is continuously obtained for the third time or more (step S10: YES), in step S11 the main control unit 33 determines whether the ventilation air volume is equal to or higher than the first ventilation air volume. Determine whether or not. Note that, in step S11, the main control unit 33 determines whether the current ventilation air volume is equal to or greater than the first ventilation air volume by performing the process of step S5 before step S1.

If the ventilation air volume is less than the first ventilation air volume (step S11: NO), the ventilation system 100 moves the process to step S13. If the ventilation air volume is greater than or equal to the first ventilation air volume (step S11: YES), in step S12, the ventilation apparatus 1 reduces the ventilation air volume to the second ventilation air volume or less based on the control signal from the controller 3. In step S13, the main control unit 33 determines whether the adjusted air volume is equal to or greater than the first adjusted air volume.

If the adjusted air volume is less than the first adjusted air volume (step S13: NO), the ventilation system 100 returns the process to step S1. If the adjusted air volume is greater than or equal to the first adjusted air volume (step S13: YES), the indoor unit 20 changes the adjusted air volume based on the control signal from the controller 3 in step S14. The adjusted air volume changes to a set adjusted air volume, an air volume that is equal to or less than the second adjusted air volume, or the like. After the process in step S14, the ventilation system 100 returns the process to step S1.

Although FIG. 8 shows that the processes in steps S6 to S8 are performed after the processes in steps S3 to S5, the processes in steps S3 to S5 and the processes in steps S6 to S8 are performed in parallel. may be performed. Alternatively, the processes in steps S6 to S8 may be executed before the processes in steps S3 to S5. In this case, if it is determined in step S6 that the concentration equal to or higher than the first threshold concentration has not been continuously obtained for the second time period or more, the ventilation system 100 moves the process to step S3. Furthermore, if the adjusted air volume is equal to or greater than the first adjusted air volume in step S7, the ventilation system 100 moves the process to step S3.

Although FIG. 8 shows that the processing of steps S13 to S14 is performed after the processing of steps S11 to S12, the processing of steps S11 to S12 and the processing of steps S13 to S14 are performed in parallel. may be performed. Alternatively, the processes in steps S13 and S14 may be executed before the processes in steps S11 and S12. In this case, if it is determined in step S13 that the adjusted air volume is less than the first adjusted air volume, the ventilation system 100 moves the process to step S11.

Hereinafter, the effects of the controller 3 and ventilation system 100 according to the first embodiment will be described. The controller 3 according to the first embodiment includes a wireless communication section 31 and a main control section 33. The wireless communication unit 31 performs wireless communication with an environment detection device that detects the concentration of carbon dioxide in the room, and receives the concentration from the environment detection device. The main control unit 33 controls the ventilation device 1 that ventilates the room based on the concentration obtained from the environment detection device.

According to the above configuration, the controller 3 acquires the indoor carbon dioxide concentration from the environment detection device through wireless communication. Then, the controller 3 controls the ventilation device 1 based on the concentration. Therefore, the ventilation system 100 can perform air conditioning according to the air quality in the area where a person is located indoors. Furthermore, it is possible to reduce the burden of wiring work and reduce costs when introducing the ventilation system 100.

The main control unit 33 in the first embodiment sets the ventilation air volume, which is the air volume for ventilation, in advance when the concentration detected by the environment detection device is equal to or higher than the first threshold concentration during the first time. The ventilation device 1 is controlled so that the air volume is equal to or higher than the first ventilation air volume. As a result, ventilation is promoted in a state where the indoor air quality is deteriorated, so that the indoor air quality can be quickly improved.

The main control unit 33 in the first embodiment controls the indoor unit 20 of the air conditioner 2 that adjusts both or one of indoor temperature and humidity. The main control unit 33 controls the ventilation device 1 to make the ventilation air volume equal to or higher than the first ventilation air volume when the concentration detected by the environment detection device is equal to or higher than the first threshold concentration during the second time period. Then, the indoor unit 20 is controlled so that the adjusted air volume is equal to or higher than the first adjusted air volume. Even if the indoor air quality deteriorates and it takes time to improve the air quality with the ventilation device 1 alone, the main control unit 33 controls the indoor unit 20 so that the adjusted air volume is equal to or higher than the first adjusted air volume. By doing so, it becomes easier and faster to improve indoor air quality.

The main control unit 33 in the first embodiment controls the ventilation device 1 via the indoor unit 20. Thereby, the number of parts of the controller 3 can be reduced. Moreover, when the controller 3 controls the indoor unit 20 by wired communication, the wiring work between the ventilation device 1 and the controller 3 is omitted, so that the wiring work is simplified.

The main control unit 33 in the first embodiment controls the ventilation device to reduce the ventilation air volume to the second ventilation air volume or less when the concentration detected by the environment detection device is less than the second threshold concentration during the third time period. Control 1. Since the main control unit 33 sets the ventilation air volume to the second ventilation air volume or less when the indoor air quality has improved, the ventilation system 100 can save energy.

The main control unit 33 in the first embodiment determines the first threshold concentration when the height from the floor of the arrangement position of the environment sensing device is the first height, and the first threshold concentration when the height from the floor of the arrangement position is the first height. The second height is higher than the first threshold concentration when the second height is larger than the first height. Carbon dioxide is heavier than nitrogen, oxygen, etc., and tends to stay near the floor. The main control unit 33 determines the first threshold concentration when the height of the arrangement position is a first height smaller than the second height, and the first threshold concentration when the height of the arrangement position is a second height. , the ventilation system 100 can provide ventilation in accordance with the location of the environmental sensing device.

The controller 3 according to the first embodiment further includes a first environment display section. The first environment display section displays first environment information indicating a magnitude relationship between the concentration detected by the boundary detection device and the first threshold concentration. This allows the user to quickly and easily recognize the state of indoor air quality.

The controller 3 according to the first embodiment further includes a second environment display section. The second environment display section displays second environment information indicating the temporal change in concentration detected by the environment detection device. This allows the user to easily recognize temporal changes in indoor air quality.

The controller 3 according to the first embodiment further includes a first guide display section. The first guidance display section displays first guidance information for guiding the user to open both or one of a window and a door in the room. The main control unit 33 controls the first guidance display unit to display the first guidance information when the concentration detected by the environment detection device is higher than the first threshold concentration during the first guidance necessity determination time. do. This allows the user to quickly recognize deterioration in air quality and the need for ventilation.

The controller 3 according to the first embodiment further includes a second guide display section. The second guide display section displays second guide information urging cleaning inside the ventilation device. The main control unit 33 controls the second guidance display unit to display second guidance information if the concentration detected by the environment detection device is higher than the first threshold concentration during the second guidance necessity determination time. do. Thereby, the user can recognize that there is a possibility that the inside of the ventilation device 1 needs to be cleaned when the indoor air quality deteriorates. For example, in a case where the air quality is not improved by ventilation by using the ventilation device 1 or by opening a window, the user can immediately recognize that cleaning inside the ventilation device 1 is necessary.

The controller 3 according to the first embodiment further includes a third guide display section. The third guidance display section displays third guidance information urging repair or inspection of the environment detection device. The ventilation device 1 includes a ventilation concentration detection device that detects the concentration of carbon dioxide in the indoor air that has flowed into the ventilation device 1. The main control unit 33 is configured to display third guidance information when there is no correlation between the concentration of carbon dioxide detected by the ventilation concentration detection device and the concentration of carbon dioxide detected by the environment detection device. Controls the third guide display section. The concentration of carbon dioxide in the ventilation device 1 and the concentration of carbon dioxide indoors are correlated. However, if the detection results of the ventilation concentration detection device and the environment detection device do not correlate, it is possible that an abnormality has occurred in the environment detection device. In such a case, the third guide display section displays the third guide information, so that the user can quickly and easily recognize the possibility of an abnormality in the environment detection device. Then, the user can quickly request repair of the environment detection device.

The controller 3 according to the first embodiment further includes a fourth guide display section. The fourth guidance display section displays fourth guidance information that prompts the user to change the position of the environment sensing device. The ventilation device 1 includes a ventilation concentration detection device that detects the concentration of carbon dioxide in the air that has flowed into the ventilation device 1. The main control unit 33 is configured to display fourth guidance information when there is no correlation between the concentration of carbon dioxide detected by the ventilation concentration detection device and the concentration of carbon dioxide detected by the environment detection device. Controls the fourth guide display section. The concentration of carbon dioxide in the ventilation device 1 and the concentration of carbon dioxide indoors are correlated. However, if the detection results of the ventilation concentration detection device and the environment detection device do not correlate, there may be a problem with the placement position of the environment detection device. For example, if the environmental sensing device is placed at a location away from where people are indoors, such as near the entrance of the room, the environmental sensing device will detect a concentration of carbon dioxide that is lower than the concentration of carbon dioxide at the location where people are. may be detected. This may result in inadequate ventilation. In such a case, the fourth guide display section displays the fourth guide information, so that the user can quickly and easily recognize the necessity of moving the environment sensing device. By moving the environment detection device, the environment detection device can accurately detect the concentration of carbon dioxide at the location where a person is present. Therefore, the ventilation system 100 can perform ventilation according to the indoor air quality.

The environment detection device in Embodiment 1 detects both or one of indoor temperature and humidity. The main control unit 33 causes the indoor unit 20 to blow air into the room. The main control unit 33 acquires position information indicating the position of the environment detection device based on both or one of the temperature and humidity detected by the environment detection device before and after the air is blown from the indoor unit 20. Thereby, the main control unit 33 can determine whether the location of the environment sensing device is appropriate based on the location information. The fourth guide display section can display fourth guide information with higher accuracy.

The environment detection device in the first embodiment wirelessly communicates with three or more radio wave communication devices placed indoors. The main control unit 33 acquires position information based on the strength of radio waves received by each of the three or more radio wave communication devices from the environment detection device. Thereby, the main control unit 33 can determine whether the location of the environment sensing device is appropriate based on the location information. The fourth guide display section can display fourth guide information with higher accuracy.

The ventilation system 100 according to the first embodiment includes an environment detection device, a ventilation device 1, and a controller 3. The environmental sensing device detects the concentration of carbon dioxide in the room. The ventilation device 1 ventilates the room. The controller 3 performs wireless communication with the environment detection device, acquires the concentration from the environment detection device, and controls the ventilation device 1 based on the acquired concentration.

The controller 3 according to the first embodiment sets the ventilation air volume, which is the air volume for ventilation, to the first ventilation air volume when the concentration detected by the environment detection device is equal to or higher than the first threshold concentration during the first time. The ventilation system 1 is controlled so as to achieve the above. As a result, ventilation is promoted in a state where the indoor air quality is deteriorated, so that the indoor air quality can be quickly improved.

The ventilation system 100 according to the first embodiment further includes an indoor unit 20 of the air conditioner 2 that adjusts both or one of indoor temperature and humidity. The controller 3 controls the ventilation device 1 to make the ventilation air volume equal to or higher than the first ventilation air volume when the concentration detected by the environment detection device is equal to or higher than the first threshold concentration during the second time period. The indoor unit 20 is controlled so that the adjusted air volume is equal to or higher than the first adjusted air volume. Even if the indoor air quality deteriorates and it takes time to improve the air quality with the ventilation device 1 alone, the controller 3 controls the indoor unit 20 so that the adjusted air volume is equal to or higher than the first adjusted air volume. Accordingly, the ventilation system 100 can quickly improve indoor air quality.

The controller 3 according to the first embodiment controls the ventilation device 1 to make the ventilation air volume equal to or less than the second ventilation air volume when the concentration detected by the environment detection device is less than the second threshold concentration during the third time period. control. Since the controller 3 sets the ventilation air volume to the second ventilation air volume or less when the indoor air quality has improved, the ventilation system 100 can save energy.

In the first embodiment, an example has been described in which the display section 34 of the controller 3 displays the first environment information to the second environment information and the first guide information to the fourth guide information. However, all or part of the first environment information to second environment information and the first guide information to fourth guide information may be displayed on the user's communication terminal device together with the display section 34 or in place of the display section 34. It may be displayed by Note that the communication terminal device is a smartphone, a tablet terminal, or the like. When the communication terminal device displays all or part of the first environment information to second environment information and the first guide information to fourth guide information, the communication terminal device and the controller 3 are not able to communicate with each other. be. An application program for processing information received from the controller 3 is installed in the communication terminal device.

When the communication terminal device displays both or one of the first environment information and the second environment information, the communication terminal device receives a request to view the first environment information and the second environment information from the user. Based on the viewing request, the communication terminal device transmits request information to the controller 3 requesting the communication terminal device to transmit both or one of the first environment information and the second environment information. The controller 3 transmits both or one of the first environment information and the second environment information to the communication terminal device according to the request information, and the communication terminal device transmits both or the received first environment information and second environment information. Show one side. When the communication terminal device displays all or part of the first guide information to the fourth guide information, the controller 3 causes the display unit 34 to display all or part of the first guide information to the fourth guide information. When the above-mentioned conditions are satisfied, all or part of the first guide information to fourth guide information is transmitted to the communication terminal device. Then, the communication terminal device displays all or part of the received first guide information to fourth guide information.

Embodiment 2.
Hereinafter, the ventilation system 100 according to the second embodiment will be described in detail. In addition, in the second embodiment, the same reference numerals are given to the same components as those in the first embodiment. Furthermore, in the second embodiment, descriptions of configurations similar to those in the first embodiment, functions similar to those in the first embodiment, etc. will be omitted unless there are special circumstances.

FIG. 9 is a block diagram illustrating a ventilation system according to the second embodiment. The ventilation system 100 in the second embodiment further includes a human sensor 6. As shown in FIG. 9 , a case in which the human sensor 6 is provided in the indoor unit 20 will be described below as an example, but the human sensor 6 may also be provided in the ventilation device 1 . The human sensor 6 detects the presence of a person indoors. Note that the human sensor 6 may be a sensor capable of detecting the number of people in the room, such as a thermograph, for example, but may also be a sensor capable of detecting the position of a person in the room. The human sensor 6 transmits the detection result to the controller 3. The human sensor 6 transmits the detection result to the controller 3 directly or via the indoor unit 20 or the like. The human sensor 6 is an example of a human detection device.

FIG. 10 is a block diagram showing a configuration example of a controller according to the second embodiment. The controller 3 of the second embodiment further includes an acquisition unit 35 in addition to the configuration of the controller 3 of the first embodiment. The acquisition unit 35 periodically acquires detection results from the human sensor 6. The acquisition unit 35 acquires the detection result from the human sensor 6 directly or via the indoor unit 20 or the like. When the acquisition unit 35 directly acquires the detection result from the human sensor 6, the acquisition unit 35 may acquire the detection result from the human sensor 6 by wired communication or by wireless communication. It's okay.

The main control unit 33 acquires the number of people in the room from the detection results acquired by the acquisition unit 35. The main control unit 33 then determines whether the number of people in the room has increased. When the number of people increases, the main control unit 33 controls the ventilation device 1 to increase the ventilation air volume from the current value in accordance with the increase in the number of people. Instead of controlling the ventilation system 1 to increase the ventilation air volume from the current value according to the increase in the number of people in the room, the main control unit 33 determines whether the number of people is equal to or more than a predetermined threshold number of people. If it is determined whether or not the number of people is equal to or greater than the threshold number of people, the ventilation device 1 may be controlled to make the ventilation air volume equal to or greater than the first ventilation air volume. Alternatively, the main control unit 33 controls the ventilation device 1 to increase the ventilation air volume from the current value according to the increase in the number of people in the room, and determines whether the number of people is equal to or higher than the threshold number of people. If the number of people is equal to or greater than the threshold number of people, the ventilation device 1 may be controlled to make the ventilation air volume equal to or greater than the first ventilation air volume.

Note that when there are people in the room, carbon dioxide increases over time, and the more people there are, the faster the carbon dioxide concentration increases. The above control process by the main control unit 33 when the number of people in the room increases or when the number of people is equal to or higher than the threshold number of people will be performed in the future even if the concentration of carbon dioxide in the room is not equal to or higher than the first threshold concentration at present. Since there is a possibility that the concentration will be higher than the first threshold value, it is executed regardless of the current concentration of carbon dioxide. For example, when the number of people in the room is equal to or higher than the threshold number of people, the main control unit 33 controls the ventilation system 1 to make the ventilation air volume equal to or higher than the first ventilation air volume even if the concentration of carbon dioxide is less than the first threshold concentration. control. Thereby, the ventilation system 100 can prevent deterioration of indoor air quality.

The main control unit 33 performs the following process in place of or in addition to the ventilation air volume control process described above when the number of people in the room increases or the number of people is equal to or greater than the threshold number of people. It can be anything. That is, the main control unit 33 may lower the first threshold concentration according to an increase in the number of people. In this case, the main control unit 33 stores the number of people concentration correspondence information that associates the number of people with the concentration of carbon dioxide, and associates the first threshold concentration with the number of people in the room in the number of people concentration correspondence information. It may be changed to a different concentration. Note that the density in the number of people density correspondence information is lower as the number of people increases. The number of people concentration correspondence information is predetermined by learning using AI (Artificial Intelligence), experimentation, or the like. The main control unit 33 may lower the first threshold concentration when the number of people in the room is equal to or greater than the threshold number of people. In this case, when the number of people in the room is equal to or greater than the threshold number of people, the main control unit 33 increases the first threshold concentration by a predetermined value from the first threshold concentration when the number of people in the room is less than the threshold number of people. It may be lowered.

The main control unit 33 may control the indoor unit 20 to increase the adjusted air volume from the current value in accordance with the increase in the number of people in the room. The main control unit 33 determines whether the number of people in the room is equal to or greater than the threshold number of people, and if the number of people is equal to or greater than the threshold number of people, controls the indoor unit 20 to make the adjusted air volume equal to or higher than the first adjusted air volume. You may. The main control unit 33 increases the adjusted air volume according to the increase in the number of people and/or changes the adjusted air volume to more than the first adjusted air volume when the number of people is equal to or more than the threshold number of people. The air conditioner 2 may be caused to perform the air agitation process as described above.

The main control unit 33 determines whether there is a correlation between the number of people based on the detection result of the human sensor 6 and the concentration detected by the carbon dioxide sensor 4, and if there is no correlation between the number of people and the concentration In this case, the display section 34 may be controlled to display both or one of the third guide information and the fourth guide information.

If there is no correlation between the number of people based on the detection result of the human sensor 6 and the concentration detected by the carbon dioxide sensor 4, the main control unit 33 determines whether the air conditioner 2 is operating or not. You may. When the air conditioner 2 is operating, windows etc. are often not open. Even though the number of people in the room has increased under such conditions, if there is no correlation between the number of people in the room and the concentration detected by the carbon dioxide sensor 4, the placement position of the carbon dioxide sensor 4 may be The case may be that the person is far away from the current location, or there is an abnormality in the carbon dioxide sensor 4. Therefore, when the number of people in the room increases and the air conditioner 2 is operating, the main control unit 33 detects that there is no correlation between the number of people in the room and the concentration detected by the carbon dioxide sensor 4. If not, the display unit 34 may be controlled to display both or one of the third guide information and the fourth guide information.

If the carbon dioxide sensor 4 is not located within a predetermined threshold range from the position of the person detected by the human sensor 6, the main control unit 33 causes the display unit 34 to display fourth guidance information. may be controlled.

Hereinafter, the hardware configuration of the controller 3 according to the second embodiment will be described. FIG. 11 is a diagram illustrating the hardware configuration of the controller according to the second embodiment. The controller 3 according to the second embodiment further includes a second input interface circuit 60 in addition to the configuration illustrated in FIG. The second input interface circuit 60 is connected to the processor 50, memory 51, etc. via a bus 59. The human sensor 6 is connected to the second input interface circuit 60 either directly or via the indoor unit 20 . The functions of the acquisition unit 35 can be realized by the second input interface circuit 60.

Hereinafter, with reference to FIG. 12, the flow of ventilation processing by the ventilation system 100 according to the second embodiment will be described. FIG. 12 is a flowchart illustrating the flow of ventilation processing by the ventilation system according to the second embodiment. The processing from step S21 to step S23 shown in FIG. 12 is executed in parallel to the processing from step S1 to step S14 shown in FIG. In step S21, the acquisition unit 35 acquires the detection result from the human sensor 6. In step S22, the main control unit 33 determines whether the number of people in the room has increased. That is, the main control unit 33 determines whether the number of people based on the detection result obtained from the human sensor 6 in the current step S21 is greater than the number of people based on the detection result obtained from the human sensor 6 in the previous step S21. Determine whether or not. If the number of people in the room has not increased (step S22: NO), the ventilation system 100 returns the process to step S21. When the number of people in the room increases (step S22: YES), the ventilation device 1 increases the ventilation air volume based on the control signal from the main control unit 33 in step S23. After the process in step S23, the ventilation system 100 returns the process to step S21.

Hereinafter, the effects of the controller 3 and ventilation system 100 according to the second embodiment will be described. The main control unit 33 in the second embodiment controls the ventilation device 1 to increase the ventilation air volume when the number of people increases based on the detection result by the person detection device that detects the presence of people in the room. When the number of people in the room increases, the concentration of carbon dioxide in the room gradually increases. The ventilation system 100 prevents deterioration of indoor air quality by causing the ventilation device 1 to increase the ventilation air volume according to the increase in the number of people before the concentration of carbon dioxide reaches the first threshold concentration. becomes possible.

The controller 3 according to the second embodiment further includes a third guidance display section that displays third guidance information that prompts repair or inspection of the environment sensing device. The main control unit 33 controls the third guidance display unit to display third guidance information when there is no correlation between the number of people based on the detection result of the human detection device and the concentration detected by the environment detection device. do. There is a correlation between the number of people in the room and the concentration of carbon dioxide in the room, but if there is no correlation between the number of people in the room and the concentration measured by the environmental detection device, there may be an abnormality in the environmental detection device. . In such a case, the third guidance display section displays the third guidance information, thereby allowing the user to recognize the possibility of an abnormality in the environment detection device. Then, the user can promptly request repair of the environment sensing device.

The controller 3 according to the second embodiment further includes a fourth guide display section that displays fourth guide information that prompts the user to change the position of the environment sensing device. The main control unit 33 controls the fourth guidance display unit to display fourth guidance information when no environment detection device is placed within a threshold range from the position of the person detected by the person detection device. This allows the user to easily recognize the necessity of moving the environment sensing device. By disposing the environmental detection device at a position where the concentration of carbon dioxide in the room is higher, the ventilation system 100 can quickly and appropriately improve the indoor air quality.

The controller 3 according to the second embodiment further includes a fourth guide display section that displays fourth guide information that prompts the user to change the position of the environment sensing device. If there is no correlation between the number of people based on the detection result of the person detection device that detects the presence of people in the room and the concentration detected by the environment detection device, the main control unit 33 transmits fourth guidance information. The fourth guidance display unit is controlled to display the information. There is a correlation between the number of people in the room and the concentration of carbon dioxide in the room, but if there is no correlation between the number of people in the room and the concentration measured by the environmental detection device, the environment detection device should be placed in a location where there are no people. There is a possibility that the concentration of carbon dioxide is relatively low indoors. In such a case, the fourth guidance display section displays the fourth guidance information, thereby allowing the user to easily recognize the necessity of moving the environment sensing device. By disposing the environmental detection device at a location where the concentration of carbon dioxide is high, such as a location where a person is present, the ventilation system 100 can quickly and appropriately improve the indoor air quality.

The ventilation system 100 according to the second embodiment further includes a person detection device that detects the presence of a person indoors. The controller 3 controls the ventilation device 1 to increase the ventilation air volume when the number of people increases based on the detection result by the person detection device. When the number of people in the room increases, the concentration of carbon dioxide in the room gradually increases. The ventilation system 100 prevents deterioration of indoor air quality by causing the ventilation device 1 to increase the ventilation air volume according to the increase in the number of people before the concentration of carbon dioxide reaches the first threshold concentration. becomes possible.

In

Embodiments

1 and 2, the case where the ventilation system 100 includes the air conditioner 2 has been described as an example, but the ventilation system 100 may not include the air conditioner 2. In this case, the ventilation system 100 does not perform the processing of steps S6 to S8 and the processing of steps S13 to S14 shown in FIG. 8.

The controller 3 according to

Embodiments

1 and 2 may further include a lighting device. Instead of displaying the guidance information on the display section 34, or in addition to displaying the guidance information, the lighting device lights up or blinks in response to instructions from the main control section 33, thereby displaying the first to fourth guidance information. Various types of guidance may be provided corresponding to all or part of the information.

Both or one of the carbon dioxide sensor 4 and the ventilation concentration sensor 12 of

Embodiments

1 and 2 may have a function as a refrigerant leak sensor. The main control unit 33 determines that the refrigerant has leaked when the concentration of the refrigerant detected by the function is equal to or higher than the refrigerant threshold concentration. Note that the refrigerant threshold concentration is set higher than the first threshold concentration so that it is not determined that the refrigerant has leaked due to an increase in the concentration of carbon dioxide. Specifically, when the first threshold concentration is 1000 [ppm], the refrigerant threshold concentration is 2000 [ppm] or more and 3000 [ppm] or less.

The indoor unit 20 of

Embodiments

1 and 2 may be provided with an indoor concentration sensor that detects the concentration of carbon dioxide in the air that has flowed into the indoor unit 20 from the room. The indoor concentration sensor is an example of an indoor concentration detection device that detects the concentration of carbon dioxide in indoor air that has flowed into the indoor unit 20. Only one ventilation device 1 may be installed in a large space, and in this case, air is ventilated over a wide area through one duct, and each of the ventilation concentration sensor 12 and the carbon dioxide sensor 4 Detection results may become uncorrelated. In such a case, by providing the indoor concentration sensor in the indoor unit 20, the main control unit 33 can detect the detection result by the indoor concentration sensor together with the detection result by the ventilation concentration sensor 12, or instead of the detection result by the ventilation concentration sensor 12. It may be determined whether the detection result correlates with the detection result by the carbon dioxide sensor 4. Then, if the detection result by the indoor concentration sensor does not correlate with the detection result by the carbon dioxide sensor 4, the display section 34 may be controlled to display the above-mentioned third guide information or fourth guide information.

Although the embodiments have been described above, the content of the present disclosure is not limited to the embodiments, and includes conceivable equivalent ranges. Furthermore, the configurations and modifications thereof described in

Embodiments

1 and 2 can be combined with each other as long as the functions and operations are not impaired.

1 Ventilation system, 2 Air conditioner, 3 Controller, 4 Carbon dioxide sensor, 6 Human sensor, 10A First ventilation blower, 10B Second ventilation blower, 11 Total heat exchanger, 12 Ventilation concentration sensor, 13 Outside temperature Humidity sensor, 14 Supply air temperature sensor, 20 Indoor unit, 21 Outdoor unit, 30 Input unit, 31 Wireless communication unit, 32 Timing unit, 33 Main control unit, 34 Display unit, 35 Acquisition unit, 50 Processor, 51 Memory, 52 Wireless communication interface circuit, 53 Timing device, 54 First input interface circuit, 55 Input device, 56 First output interface circuit, 57 Second output interface circuit, 58 Display device, 59 Bus, 60 Second input interface circuit, 100 Ventilation System, t1, t2, t3, t4, t5 time points.

Claims

a wireless communication unit that performs wireless communication with an environmental sensing device that detects the concentration of carbon dioxide in the room and acquires the concentration from the environmental sensing device;
a main control unit that controls a ventilation device that ventilates the room based on the concentration obtained from the environment detection device;
A controller comprising:
The main control unit includes:
If the concentration detected by the environment detection device is equal to or higher than a predetermined first threshold concentration for a predetermined first time, the ventilation air volume, which is the air volume for ventilation, is adjusted to a predetermined value. The controller according to claim 1, wherein the controller controls the ventilation device so that the ventilation air volume is equal to or higher than a first ventilation air volume.
The main control unit includes:
controlling an indoor unit of an air conditioner that adjusts both or one of indoor temperature and humidity;
If the concentration detected by the environment detection device is equal to or higher than the first threshold concentration during a second time period that is longer than the first time period, the ventilation air volume is set to be equal to or higher than the first ventilation air volume. 3. The indoor unit according to claim 2, wherein the indoor unit is controlled so that the adjusted air volume for adjusting both or one of the temperature and humidity is equal to or higher than a predetermined first adjusted air volume while the ventilation device is controlled. Controller listed.
The main control unit includes:
The controller according to claim 3, which controls the ventilation device via the indoor unit.
The main control unit includes:
If the concentration detected by the environment detection device is less than a second threshold concentration, which is lower than the first threshold concentration, for a predetermined third time period, the ventilation air volume is changed to the first ventilation air volume. The controller according to any one of claims 2 to 4, wherein the controller is configured to control the ventilation device so that the ventilation air volume is equal to or less than a second ventilation air volume, which is smaller than the second ventilation air volume.
The main control unit includes:
Any one of claims 2 to 5, wherein the ventilation device is controlled to increase the ventilation air volume when the number of people increases based on a detection result by a person detection device that detects the presence of a person in the room. The controller described in section.
The main control unit includes:
The first threshold concentration when the height from the floor of the room at the placement position where the environmental detection device is placed is a first height, The controller according to any one of claims 2 to 6, wherein the height is higher than the first threshold concentration when the height is a second height larger than the first height.
Any one of claims 2 to 7, further comprising a first environment display unit that displays first environment information indicating a magnitude relationship between the concentration detected by the environment detection device and the first threshold concentration. The controller described in paragraph 1.
The controller according to any one of claims 2 to 8, further comprising a second environment display section that displays second environment information indicating a temporal change in the concentration detected by the environment detection device.
further comprising a first guidance display section that displays first guidance information for guiding the user to open both or one of the windows and doors in the room;
The main control unit includes:
If the concentration detected by the environment detection device is higher than the first threshold concentration during a first guidance necessity determination time that is longer than the first time, the first guide information is displayed. The controller according to any one of claims 2 to 9, which controls a guide display section.
further comprising a second guide display section that displays second guide information urging cleaning inside the ventilation device,
The main control unit includes:
If the concentration detected by the environment detection device is higher than the first threshold concentration during the second guidance necessity determination time that is longer than the first time, the second guide information is displayed. The controller according to any one of claims 2 to 10, which controls a guide display section.
further comprising a third guidance display unit that displays third guidance information prompting repair or inspection of the environment detection device;
The main control unit includes:
There is a correlation between the concentration of carbon dioxide detected by a ventilation concentration detection device that detects the concentration of carbon dioxide in the indoor air flowing into the ventilation device and the concentration of carbon dioxide detected by the environment detection device. and there is no correlation between the number of people based on the detection result of a person detection device that detects the presence of people in the room and the concentration detected by the environment detection device; or In one case, the controller according to any one of claims 1 to 11 controls the third guidance display section to display the third guidance information.
further comprising a fourth guidance display unit that displays fourth guidance information prompting a change in the position of the environment sensing device;
The main control unit includes:
There is a correlation between the concentration of carbon dioxide detected by a ventilation concentration detection device that detects the concentration of carbon dioxide in the indoor air flowing into the ventilation device and the concentration of carbon dioxide detected by the environment detection device. and/or the case where the environment sensing device is not located within a predetermined threshold range from the position of the person detected by the person detection device that detects the position of the person in the room. The controller according to any one of claims 1 to 12, wherein the controller controls the fourth guide display section to display the fourth guide information in the case where the fourth guide information is displayed.
The environment sensing device includes:
Detecting both or one of temperature and humidity in the room,
The main control unit includes:
causing an indoor unit of an air conditioner that adjusts both or one of indoor temperature and humidity to blow air into the room;
The controller according to claim 13, wherein the controller acquires position information indicating the position of the environment detection device based on both or one of the temperature and humidity detected by the environment detection device before and after air is blown from the indoor unit. .
The environment detection device wirelessly communicates with three or more radio wave communication devices arranged in the room,
The main control unit includes:
The controller according to claim 13, wherein each of the three or more radio wave communication devices acquires position information indicating the position of the environment sensing device based on the intensity of radio waves received from the environment sensing device.
an environmental detection device that detects the concentration of carbon dioxide indoors;
a ventilation device that ventilates the room;
a controller that performs wireless communication with the environmental sensing device, acquires the concentration from the environmental sensing device, and controls the ventilation device based on the acquired concentration;
Ventilation system with.