Ventilation and air conditioning system

Abstract

This ventilation and air conditioning system comprises an air conditioner, a ventilating device, a CO2 detecting device, a person detecting device, a temperature measuring device, and a control device. The air conditioner air conditions a target space. The ventilating device ventilates the target space. The CO2 detecting device detects the concentration of carbon dioxide in the target space. The person detecting device detects the presence or absence of a person at each position in the target space, or the number of people in the target space. The temperature detecting device measures the temperature of the target space. The control device predicts the concentration of carbon dioxide after a preset first time on the basis of the volume of the target space, the number of people in the target space, the amount of ventilation by the ventilating device, and the current value of the concentration of carbon dioxide in the target space. The control device controls the ventilating device on the basis of a predicted value, which is the predicted value of the carbon dioxide concentration, and controls the air conditioner on the basis of the temperature of the target space.

Description

ventilation and air conditioning system

[0001] The present disclosure relates to a ventilation and air conditioning system that adjusts the ventilation volume and temperature in a target space.

[0002] Conventionally, ventilation and air-conditioning systems that ventilate a target space based on the carbon dioxide concentration and the number of people in the target space have been known. For example, in the ventilation and air-conditioning system described in Patent Document 1, the ventilation volume by the ventilation device is controlled based on whether the carbon dioxide concentration in the target space is equal to or greater than a threshold and based on the number of people in the target space.

[0003] Japanese Patent Application Laid-Open No. 2022-71716

[0004] Conventional ventilation and air conditioning systems change the ventilation volume depending on whether the carbon dioxide concentration in the target space is above a threshold value and also on the number of people currently in the target space. Therefore, if the number of people in the target space suddenly increases, the carbon dioxide concentration may exceed the ventilation standard value, such as 1000 ppb.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a ventilation and air-conditioning system that can maintain a low carbon dioxide concentration in a target space.

[0006] The ventilation and air-conditioning system according to the present disclosure includes an air conditioner that conditions the air in a target space, a ventilation device that ventilates the target space, and a CO 2 detector that detects the concentration of carbon dioxide in the target space. ２ The target space has a detection device, a human detection device that detects the presence or absence of people at each position within the target space or the number of people in the target space, a temperature measurement device that measures the air temperature in the target space, and a control device that controls the air conditioner and the ventilation device, and the control device predicts the carbon dioxide concentration after a predetermined first hour based on the volume of the target space, the number of people in the target space, the ventilation volume by the ventilation device, and the current value of the carbon dioxide concentration in the target space, controls the ventilation device based on the predicted value which is the predicted value of the carbon dioxide concentration, and controls the air conditioner based on the air temperature of the target space.

[0007] The ventilation and air-conditioning system according to the present disclosure can maintain a low carbon dioxide concentration even in an environment where the carbon dioxide concentration may increase suddenly, such as when there is a sudden increase in the number of people in the target space.

[0008] It is a schematic diagram showing an installation example of a ventilation air-conditioning system according to an embodiment. It is a block diagram illustrating an example of the functional configuration of a ventilation air-conditioning system according to an embodiment. It is a flowchart illustrating a learning process by a processing unit of a control device according to an embodiment. It is a flowchart illustrating ventilation air-conditioning control by a control device according to an embodiment.

[0009] Hereinafter, embodiments of a ventilation air-conditioning system according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the following embodiments, and various modifications are possible without departing from the spirit of the present disclosure.

[0010] 1 is a schematic diagram showing an example of installation of a ventilation air-conditioning system 100 according to an embodiment. The ventilation air-conditioning system 100 is installed in a target space TA, and ２ The system includes a (carbon dioxide) detection device 1, a human detection device 2, a temperature measurement device 3, a ventilation device 4, an air conditioner 5, and a control device 6. ２ The detection device 1 detects CO ２ Detecting the concentration of CO ２ The sensor detects CO ２ Shows the concentration of CO ２ It includes a communication interface circuit that transmits concentration information to the control device 6. ２ The communication interface circuit in the detection device 1 may be a wired communication interface circuit or a wireless communication interface circuit.

[0011] The human detection device 2 includes a human presence sensor that detects the presence of a human within the target space TA, and a communication interface circuit that transmits human detection information indicating the detection result by the human presence sensor to the control device 6. The human presence sensor may detect the number of people within the target space TA. The communication interface circuit in the human detection device 2 may be a wired communication interface circuit or a wireless communication interface circuit.

[0012] The temperature measuring device 3 includes a temperature sensor that measures the air temperature in the target space TA, and a communication interface circuit that transmits temperature information indicating the measured temperature to the control device 6. The communication interface circuit in the temperature measuring device 3 may be a wired communication interface circuit or a wireless communication interface circuit.

[0013] The ventilation device 4 exhausts the air in the target space TA to an external space, which is a space outside the target space TA, such as outdoors, and guides the air in the external space into the target space TA. The air conditioner 5 adjusts the temperature of the target space TA.

[0014] The control device 6 is ２ CO obtained from detector 1 ２ The control device 6 controls the ventilation device 4 and the air conditioner 5 based on the concentration information, the human detection information obtained from the human detection device 2, and the temperature information obtained from the temperature measuring device 3. The control device 6 is, for example, a remote controller for the ventilation device 4 and the air conditioner 5. Note that if the human sensor of the human detection device 2 detects the presence of people at various positions within the target space TA, the control device 6 may derive the number of people within the target space TA based on the human detection information from the human detection device 2.

[0015] 2 is a block diagram illustrating the functional configuration of the ventilation air-conditioning system 100 according to the embodiment. The control device 6 includes an operation unit 60, an information acquisition unit 61, an input / output unit 62, a storage unit 63, and a processing unit 64.

[0016] The operation unit 60 includes buttons, a touch panel, or the like, and receives operations from a user, whereby instructions to each of the ventilation device 4 and the air conditioner 5 are input to the operation unit 60.

[0017] The information acquisition unit 61 is a communication interface circuit. ２ The detection device 1, the human detection device 2, and the temperature measurement device 3 communicate with each other, and the CO ２ CO from detector 1 ２The information acquisition unit 61 receives concentration information, human detection information from the human detection device 2, and temperature information from the temperature measurement device 3. The information acquisition unit 61 may be a wired communication interface circuit or a wireless communication interface circuit. Alternatively, the information acquisition unit 61 may include a wired communication interface circuit and a wireless communication interface circuit.

[0018] The input / output unit 62 is an input / output interface circuit, and enables information to be exchanged between the processing unit 64 and each of the ventilation device 4 and the air conditioner 5. The input / output unit 62 may enable information to be exchanged between the processing unit 64 and each of the ventilation device 4 and the air conditioner 5 via a wired connection, or may enable information to be exchanged wirelessly.

[0019] The storage unit 63 includes a memory such as a read-only memory (ROM) or a random access memory (RAM), a storage device such as a HDD or a flash memory, or a combination of a memory and a storage device. The storage unit 63 stores various information such as programs for controlling the ventilator 4 and the air conditioner 5.

[0020] The processing unit 64 is, for example, a CPU (Central Processing Unit). The processing unit 64 may include a memory such as a ROM or a RAM, and a program for controlling the ventilation device 4 and the air conditioner 5 may be stored in the memory of the processing unit 64. ２ The processing unit 64 acquires concentration information, human detection information, and temperature information. The processing unit 64 also acquires instructions from the operation unit 60 via a user's operation. The processing unit 64 generates control signals for controlling each of the ventilator 4 and the air conditioner 5 based on various information from the information acquisition unit 61, instructions from the operation unit 60, and various programs stored in the memory unit 63 or the processing unit 64. The processing unit 64 then outputs the generated control signals to the ventilator 4 and the air conditioner 5 via the input / output unit 62. The ventilator 4 and the air conditioner 5 that have acquired the control signals operate based on the control signals.

[0021] The processing unit 64 in the embodiment is equipped with AI (Artificial Intelligence). ２ The change in the concentration of CO in the target space TA after the first time is learned based on the learning result. ２ The first time period may be a predetermined time period, such as 3 to 5 minutes, or may be set by the user via the operation unit 60. The processing unit 64 controls the ventilation device 4 based on the predicted concentration.

[0022] The AI ​​learning in the processing unit 64 will be described in detail below. FIG. 3 is a flowchart illustrating the learning process by the processing unit 64 of the control device 6 in the embodiment. The process shown in FIG. 3 is performed over a predetermined learning period. In step S1, the processing unit 64 determines whether or not a person is present in the target space TA. The processing unit 64 determines whether or not a person is present in the target space TA based on human detection information from the human detection device 2. If no person is present in the target space TA (step S1: NO), the processing unit 64 returns the process to step S1.

[0023] If a person is present in the target space TA (step S1: YES), in step S2, the processing unit 64 calculates the CO ２ Predict the concentration of CO ２ The concentration of is predicted based on a predicted concentration model stored in the storage unit 63. The initial predicted concentration model is determined in advance and stored in the storage unit 63 before the processing of Fig. 3. This initial predicted concentration model is determined based on the volume of the target space TA, the ventilation rate of the ventilation device 4, the number of people in the target space TA, etc.

[0024] In the initial predicted concentration model, the volume of the target space TA is set, and the ventilation volume of the ventilation device 4, the number of people, and the current CO ２ For each concentration of CO after the first hour ２ More specifically, the initial predicted concentration model is assigned a predicted value of CO ２As a predicted value of the concentration of CO , the larger the ventilation volume, the smaller the value assigned, and the larger the number of people, the larger the value assigned. ２ The larger the concentration value of CO , the larger the value assigned to it. The volume of the target space TA in the predicted concentration model is set by, for example, the user inputting information indicating the volume using the operation unit 60. In the following, ２ In the following, when simply referring to a predicted value, the value of CO ２ This refers to the predicted concentration of

[0025] Here, the ventilation volume by the ventilation device 4 in the embodiment includes the ventilation volume when the ventilation device 4 is in a stopped state, the ventilation volume when the ventilation device 4 is operating at low speed, the ventilation volume when the ventilation device 4 is operating at medium speed, and the ventilation volume when the ventilation device 4 is operating at high speed. The ventilation volume when the ventilation device 4 is in a stopped state is 0 m ３ When the ventilation device 4 is in low operation, the ventilation volume is, for example, 20 m ３ When the ventilation device 4 is in medium operation, the ventilation volume is, for example, 100 m ３ When the ventilation device 4 is in high operation, the ventilation volume is, for example, 200 m ３ / h. In the initial predicted concentration model, for each number of people and each current value, the predicted value when the ventilator 4 is stopped is set to be larger than the predicted value when the ventilator 4 is operating at low pressure, the predicted value when the ventilator 4 is operating at low pressure is set to be larger than the predicted value when the ventilator 4 is operating at medium pressure, and the predicted value when the ventilator 4 is operating at medium pressure is set to be larger than the predicted value when the ventilator 4 is operating at high pressure. Furthermore, in the initial predicted concentration model, the larger the number of people is, for each ventilation volume and each current value, the larger the CO ２ The predicted value of the concentration of CO is set. Furthermore, in the initial predicted concentration model, the larger the current value of each ventilation volume and each number of people, the larger the predicted value is set. The processing unit 64 calculates the current ventilation volume of the ventilation device 4, the number of people indicated by the human detection information currently obtained from the human detection device 2, and the current CO ２ CO obtained from detector 1 ２Based on the current value indicated by the concentration information, the CO ２ Obtain a predicted concentration of

[0026] In step S3, the processing unit 64 calculates the CO ２ CO from detector 1 ２ The value indicated by the concentration information is compared with the predicted value obtained in step S2. ２ CO from detector 1 ２ The value indicated by the concentration information may also be referred to as the actual measured value.

[0027] In step S4, the processing unit 64 adjusts the predicted concentration model using AI based on the comparison result in step S3 so as to reduce the difference between the predicted value and the actual measured value. That is, the processing unit 64 changes the predicted value in the predicted concentration model so as to reduce the difference between the predicted value and the actual measured value. Note that if steps S1 to S4 have already been performed multiple times, the processing unit 64 cumulatively stores the predicted value and actual measured value obtained for each execution of steps S1 to S4, and adjusts the predicted concentration model so as to reduce the cumulative difference between each predicted value and each actual measured value and so that the difference does not exceed a predetermined reference value. After the learning time has elapsed, the process shown in FIG. 3 ends, and a trained predicted concentration model is obtained. Hereinafter, the trained predicted concentration model may also be referred to as a trained model.

[0028] Next, the control of the ventilation device 4 and the air conditioner 5 by the control device 6 based on the trained model will be described with reference to FIG. 4 . FIG. 4 is a flowchart illustrating ventilation and air conditioning control by the control device 6 in an embodiment. In step S11, the processing unit 64 of the control device 6 obtains a predicted value based on the trained model from the current value, the number of people in the target space TA at the current time, and the current ventilation rate. In step S12, the processing unit 64 determines whether the predicted value obtained in step S11 is equal to or greater than a first threshold value. Here, the first threshold value may be a predetermined concentration, such as 800 ppm, or may be set by the user via the operation unit 60.

[0029] If the predicted value is less than the first threshold value (step S12: NO), the control device 6 returns the process to step S11. When returning the process from step S12 to step S11, the control device 6 may not change the ventilation volume of the ventilation device 4, or may control the ventilation device 4 to reduce the ventilation volume. If the predicted value is equal to or greater than the first threshold value (step S12: YES), the control device 6 moves the process to step S13. Instead of steps S11 and S12, the processing unit 64 may calculate the CO ２ CO obtained from detector 1 ２ It may be determined whether the current value indicated by the concentration information is equal to or greater than a first threshold value. In this case, the control device 6 stops the process if the current value is less than the first threshold value, and proceeds to step S13 if the current value is equal to or greater than the first threshold value.

[0030] In step S13, the processing unit 64 calculates the CO ２ In detail, in step S13, if the value obtained by subtracting the current value from the predicted value is positive, the processing unit 64 determines whether the concentration of CO ２ If the value obtained by subtracting the current value from the predicted value is negative, the processing unit 64 determines that the concentration of CO ２ If the predicted value and the current value are equal, the processing unit 64 determines that the concentration of CO ２ It is determined that the concentration does not change.

[0031] CO in the first hour ２ If the concentration of CO increases (step S13: increase), in step S14, the processing unit 64 ２ The increase in CO is determined to be large, medium, or small. The increase in CO is a value obtained by dividing the difference by the first time. ２ The rate of increase in the concentration of CO is, for example, 100 ppm / min or more. ２A moderate increase in CO concentration refers to an increase in CO concentration at a rate of 20 ppm / min or more and less than 100 ppm / min, for example, 50 ppm / min. ２ The increase in CO concentration is small, for example, when the increase rate is less than 20 ppm / min. ２ This refers to the case where the concentration of

[0032] CO at 1st hour ２ If the increase in CO is large (step S14: Large), in step S15, the control device 6 controls the ventilator 4 to perform high-power operation. ２ If the increase in CO is medium (step S14: medium), in step S16, the control device 6 controls the ventilator 4 to perform medium operation. ２ If the increase in the air temperature is small (step S14: small), the control device 6 controls the ventilation device 4 to perform low-temperature operation in step S17. After the processes of steps S15, S16, and S17, the control device 6 proceeds to step S21.

[0033] CO in the first hour ２ If the concentration of does not change (step S13: no change), in step S18, the control device 6 determines whether the current value is equal to or greater than a predetermined second threshold. The second threshold is equal to or less than the first threshold. If the current value is equal to or greater than the second threshold (step S18: YES), the control device 6 proceeds to step S23. If the current value is less than the second threshold (step S18: NO), the control device 6 proceeds to step S24 without changing the ventilation volume.

[0034] CO in the first hour ２If the concentration of decreases (step S13: decrease), in step S19, the control device 6 determines whether or not a person is present in the target space TA. If no person is present in the target space TA (step S19: NO), in step S20, the control device 6 stops the ventilation device 4 and the air conditioner 5 to save power. After processing step S20, the control device 6 ends the processing. If a person is present in the target space TA (step S19: YES), in step S21, the control device 6 determines whether or not the current value is equal to or greater than the second threshold. If the current value is less than the second threshold (step S21: NO), in step S22, the control device 6 controls the ventilation device 4 to reduce the ventilation volume. After processing step S22, the control device 6 proceeds to step S24. If the current value is equal to or greater than the second threshold (step S21: YES), the control device 6 proceeds to step S23.

[0035] In step S23, the control device 6 controls the ventilation device 4 to increase the ventilation volume from the current ventilation volume. For example, the control device 6 may increase the ventilation volume before the processing of step S23 by a predetermined amount. In this case, if the ventilation device 4 was operating at low volume before the processing of step S23, the control device 6 controls the ventilation device 4 in step S23 so that the ventilation volume during the low volume operation is equal to the ventilation volume between the low volume operation and medium volume operation, the ventilation volume between the low volume operation and high volume operation, or the ventilation volume between the ventilation volume during the low volume operation and the upper limit ventilation volume. Furthermore, if the ventilation device 4 was operating at medium volume before the processing of step S23, the control device 6 controls the ventilation device 4 in step S23 so that the ventilation volume during the medium volume operation is equal to the ventilation volume between the medium volume operation and high volume operation, or the ventilation volume between the ventilation volume during the medium volume operation and the upper limit ventilation volume. Furthermore, if the ventilation device 4 was operating at high power before the processing of step S23, the control device 6 controls the ventilation device 4 in step S23 so that the ventilation volume in high power operation is between the ventilation volume for high power operation and the upper limit ventilation volume. Alternatively, if the ventilation device 4 was operating at low power before the processing of step S23, the control device 6 may cause the ventilation device 4 to operate at medium power or high power, or if the ventilation device 4 was operating at medium power before the processing of step S23, the control device 6 may cause the ventilation device 4 to operate at high power in step S23. In this case, if the ventilation device 4 was operating at high power before the processing of step S23, the control device 6 may not change the ventilation volume of the ventilation device 4 in step S23, or may control the ventilation device 4 to increase the ventilation volume up to the upper limit ventilation volume. After processing step S23, the control device 6 proceeds to step S24.

[0036] In step S24, the control device 6 controls the air conditioner 5 based on the temperature information. Specifically, the control device 6 controls the air conditioner 5 based on the temperature information so that the air temperature in the target space TA becomes the set temperature. The set temperature is a temperature set via the operation unit 60.

[0037] In the above embodiment, the control device 6 calculates the CO ２In the example shown, the ventilation device 4 and the air conditioner 5 are controlled based on the predicted value of the concentration of CO . However, when a user inputs an instruction to the ventilation device 4 and the air conditioner 5 into the operation unit 60, the control device 6 may control the ventilation device 4 and the air conditioner 5 based on the instruction. In the following, the CO from the trained model will be described. ２ Control based on a predicted value of the concentration of β may be referred to as automatic control, and control based on an instruction input to the operation unit 60 may be referred to as manual control. The operation unit 60 may accept a user's selection of either automatic control or manual control to be preferentially executed by the control device 6. In this case, the control device 6 preferentially executes the control selected via the operation unit 60.

[0038] In the embodiment, an example has been shown in which a user can configure various settings via the operation unit 60. However, instead of or in addition to the operation unit 60, the ventilation and air-conditioning system 100 may accept settings from the user via an external communication device (not shown). In this case, the control device 6 includes a communication unit (not shown) that communicates with the external communication device via a wired or wireless connection. The communication unit is a wired communication interface circuit or a wireless communication interface circuit. The external communication device accepts from the user settings for at least one of the first threshold value, the first time period, and the volume of the target space TA. The communication unit receives setting information related to the settings accepted by the external communication device from the external communication device. The processing unit 64 then executes processing based on the setting information received by the communication unit.

[0039] The external communication device may receive a selection of whether manual control or automatic control is to be given priority. In this case, the external communication device transmits the received selection to the communication unit. Then, the control device 6 gives priority to either manual control or automatic control based on the selection received via the communication unit.

[0040] In the above embodiment, an example has been shown in which the control device 6 generates a trained model, but the control device 6 may also acquire a trained model generated by an external server (not shown) from the external server, and obtain a predicted value based on the acquired trained model.

[0041] The effects of the ventilation air-conditioning system 100 according to the embodiment will be described below. The ventilation air-conditioning system 100 comprises an air conditioner 5, a ventilation device 4, and a CO ２ The system includes a detection device 1, a human detection device 2, a temperature measurement device 3, and a control device 6. An air conditioner 5 performs air conditioning in the target space TA, and a ventilation device 4 performs ventilation in the target space TA. ２ The detection device 1 detects the carbon dioxide concentration in the target space TA. The human detection device 2 detects the presence or absence of a human at each position in the target space TA. The temperature measurement device 3 measures the air temperature in the target space TA. The control device 6 controls the air conditioner 5 and the ventilation device 4. The control device 6 predicts the carbon dioxide concentration after a predetermined first hour based on the volume of the target space TA, the number of people in the target space TA, the ventilation volume by the ventilation device 4, and the current value of the carbon dioxide concentration in the target space TA. The control device 6 then controls the ventilation device 4 based on the predicted value, which is the predicted value of the carbon dioxide concentration, and controls the air conditioner 5 based on the air temperature in the target space TA.

[0042] According to the above configuration, the control device 6 determines the CO ２ The ventilation air-conditioning system 100 predicts the concentration of CO and controls the ventilation device 4 based on the predicted value. ２ Even in environments where CO concentrations can increase rapidly, ２ The concentration of CO₂ can be maintained at a low level. Furthermore, since the control device 6 controls the air conditioner 5 based on the temperature of the target space TA, it is possible to avoid a sudden change in the temperature or deviation of the temperature from the set temperature. Therefore, user comfort is improved.

[0043] The control device 6 in the embodiment obtains a predicted value from the volume of the target space TA, the number of people in the target space TA, the ventilation rate, the current value of the carbon dioxide concentration, and the actual measured value of the carbon dioxide concentration after the first hour has elapsed from the present time, based on a trained model obtained from the volume of the target space TA, the number of people in the target space TA, the ventilation rate, the current value of the carbon dioxide concentration. This allows the control device 6 to obtain a highly accurate predicted value based on the trained model. The control device 6 can then control the ventilation device 4 based on this highly accurate predicted value. Therefore, the ventilation air-conditioning system 100 can ２ The concentration of can be kept low.

[0044] The control device 6 in this embodiment generates a trained model based on the volume of the target space TA, the number of people in the target space TA, the ventilation rate, the current carbon dioxide concentration, and the actual measured value of the carbon dioxide concentration after the first hour has elapsed from the present time. This allows the ventilation air-conditioning system 100 to obtain a trained model for obtaining with high accuracy the predicted value required to suppress the carbon dioxide concentration in the target space TA after the first hour.

[0045] The control device 6 in this embodiment controls the air conditioner 5 so that the temperature in the target space TA becomes the set temperature, depending on the ventilation volume of the ventilation device 4. This keeps the temperature in the target space TA at the temperature desired by the user, and the ventilation air-conditioning system 100 can maintain the comfort of the user.

[0046] In the embodiment, when the predicted value is equal to or greater than a predetermined first threshold and is greater than the current value, the control device 6 controls the ventilation volume by the ventilator 4 based on the rate of increase in carbon dioxide over the first time period, which is obtained based on the predicted value, the current value, and the first time period. ２ The increase in the concentration can be suppressed.

[0047] In the embodiment, the control device 6 controls the ventilator 4 to increase the ventilation rate when the predicted value is equal to or greater than a predetermined first threshold, the predicted value is equal to the current value, and the current value of carbon dioxide is equal to or greater than a second threshold. ２ If the concentration of β-aminobenzoates is already equal to or greater than the first threshold, the ventilation rate is increased to a level higher than the set ventilation rate, thereby quickly ventilating the target space TA and improving user comfort.

[0048] In the embodiment, the control device 6 determines whether or not there is a person in the target space TA when the predicted value is equal to or greater than a preset first threshold value and is smaller than the current value. Then, if there is no person in the target space TA, the control device 6 stops the ventilation device 4 and the air conditioner 5. On the other hand, if there is a person in the target space TA, the control device 6 determines whether or not the current value is equal to or greater than a second threshold value. If the current value is equal to or greater than the second threshold value, the control device 6 controls the ventilation device 4 to increase the ventilation rate, and if the current value is less than the second threshold value, the control device 6 controls the ventilation device 4 to decrease the ventilation rate. The control device 6 determines the CO2 concentration in the target space TA. ２ When the concentration of NH3 is predicted to decrease and no one is present in the target space TA, the control device 6 stops the ventilation device 4 and the air conditioner 5, thereby saving power. When a person is present in the target space TA and the current value is less than the second threshold, the control device 6 controls the ventilation device 4 to reduce the ventilation rate, thereby saving power while maintaining the comfort of users in the target space TA. When a person is present in the target space TA and the current value is equal to or greater than the second threshold, the control device 6 controls the ventilation device 4 to increase the ventilation rate, thereby improving user comfort.

[0049] The control device 6 in this embodiment includes an operation unit 60 that accepts input from a user, and accepts the setting of the first threshold value via the operation unit 60. As a result, the ventilation air-conditioning system 100 controls the CO ２ The density can be adjusted to a desired density by the user.

[0050] The control device 6 in this embodiment includes a communication unit that communicates with an external communication device that accepts input from a user, and acquires the first threshold value input to the external communication device via the communication unit. As a result, the ventilation air-conditioning system 100 controls the CO 2 concentration in the target space TA based on the user's input to the external communication device. ２ The concentration of the ink can be adjusted to a desired concentration by the user, thereby improving convenience and comfort for the user.

[0051] The control device 6 in this embodiment includes an operation unit 60 that accepts input from a user, and acquires information indicating the volume of the target space TA via the operation unit 60. This enables the ventilation and air-conditioning system 100 to perform ventilation and air-conditioning based on a highly accurate value for the volume of the target space TA, thereby further improving user comfort.

[0052] The control device 6 in this embodiment includes an operation unit 60 that accepts input from a user, and accepts the setting of the first time period via the operation unit 60. This allows the ventilation and air-conditioning system 100 to flexibly reduce the carbon dioxide concentration in the target space TA in accordance with the user's wishes.

[0053] In the embodiment, the control device 6 includes a communication unit that communicates with an external communication device that accepts input from a user, and acquires information indicating the volume of the target space TA and / or the first time period input to the external communication device via the communication unit. The control device 6 acquires information indicating the volume of the target space TA and / or the first time period from the user via the external communication device and the communication unit, thereby improving user convenience. When the control device 6 acquires information indicating the volume of the target space TA via the external communication device and the communication unit, the ventilation and air-conditioning system 100 can perform ventilation and air-conditioning based on a highly accurate value for the volume of the target space TA, thereby improving user comfort. When the control device 6 acquires information indicating the first time period via the external communication device and the communication unit, the ventilation and air-conditioning system 100 can flexibly reduce the carbon dioxide concentration in the target space TA according to the user's wishes, thereby improving user comfort.

[0054] The control device 6 in this embodiment includes an operation unit 60 that accepts input from a user. The operation unit 60 accepts a selection of whether to prioritize execution of manual control based on instructions from the user to the ventilation device 4 and the air conditioner 5, or automatic control based on predicted values. The control device 6 prioritizes execution of either manual control or automatic control selected via the operation unit 60. This improves user convenience.

[0055] The control device 6 in this embodiment includes a communication unit that communicates with an external communication device that accepts input from a user. The external communication device accepts a selection of whether to prioritize execution of manual control based on instructions from the user to the ventilation device 4 and the air conditioner 5 or automatic control based on predicted values, and transmits the content of the accepted selection to the communication unit. The control device 6 prioritizes execution of either manual control or automatic control based on the content of the selection acquired via the communication unit. This improves user convenience.

[0056] 1 CO ２ Detection device, 2: Person detection device, 3: Temperature measurement device, 4: Ventilation device, 5: Air conditioner, 6: Control device, 60: Operation unit, 61: Information acquisition unit, 62: Input / output unit, 63: Memory unit, 64: Processing unit, 100: Ventilation and air conditioning system, TA: Target space.

Claims

1. An air conditioner that conditions the air in a target space; a ventilation device that ventilates the target space; and a CO detector that detects the concentration of carbon dioxide in the target space. ２ a detection device; a human detection device that detects the presence or absence of people at each position within the target space or the number of people in the target space; a temperature measuring device that measures the air temperature in the target space; and a control device that controls the air conditioner and the ventilation device, wherein the control device predicts the carbon dioxide concentration after a predetermined first hour based on the volume of the target space, the number of people in the target space, the ventilation volume by the ventilation device, and the current value of the carbon dioxide concentration in the target space, controls the ventilation device based on the predicted value, which is the predicted value of the carbon dioxide concentration, and controls the air conditioner based on the air temperature in the target space.

2. The ventilation and air conditioning system of claim 1, wherein the control device obtains the predicted value from the volume of the target space, the number of people in the target space, the ventilation rate, and the current value of the carbon dioxide concentration based on a learned model obtained from the volume of the target space, the number of people in the target space, the ventilation rate, the current value of the carbon dioxide concentration, and the actual measured value of the carbon dioxide concentration after the first time has elapsed from the present time.

3. The ventilation and air conditioning system of claim 2, wherein the control device generates the learned model based on the volume of the target space, the number of people in the target space, the ventilation volume, the current value of the carbon dioxide concentration, and the actual measured value of the carbon dioxide concentration after the first time has elapsed from the present time.

4. A ventilation and air conditioning system as described in any one of claims 1 to 3, wherein the control device controls the air conditioner so that the air temperature in the target space becomes a set temperature in accordance with the ventilation volume by the ventilation device.

5. A ventilation and air conditioning system as described in any one of claims 1 to 4, wherein the control device, when the predicted value is equal to or greater than a predetermined first threshold value and is greater than the current value, controls the ventilation volume by the ventilation device based on the rate of increase in carbon dioxide at the first time, which is obtained based on the predicted value, the current value, and the first time.

6. The ventilation and air conditioning system of claim 5, wherein the control device controls the ventilation device to increase the ventilation volume when the predicted value is greater than or equal to the first threshold value, the predicted value is equal to the current value, and the current value is greater than or equal to a predetermined second threshold value.

7. The ventilation and air conditioning system of claim 6, wherein the control device determines whether or not there is a person in the target space when the predicted value is equal to or greater than the first threshold value and is smaller than the current value, and if there is no person in the target space, stops the ventilation device and the air conditioner, and if there is a person in the target space, determines whether or not the current value is equal to or greater than the second threshold value, and if the current value is equal to or greater than the second threshold, controls the ventilation device to increase the ventilation volume, and if the current value is less than the second threshold, controls the ventilation device to decrease the ventilation volume.

8. A ventilation and air conditioning system as described in any one of claims 5 to 7, wherein the control device has an operation unit that accepts input from a user, and accepts the setting of the first threshold value via the operation unit.

9. A ventilation and air conditioning system as described in any one of claims 5 to 7, wherein the control device is provided with a communication unit that communicates with an external communication device that accepts input from a user, and the first threshold value input to the external communication device is obtained via the communication unit.

10. A ventilation and air conditioning system as described in any one of claims 1 to 7, wherein the control device is provided with an operation unit that accepts input from a user, and obtains information indicating the volume of the target space via the operation unit.

11. A ventilation and air conditioning system as described in any one of claims 1 to 7, wherein the control device is provided with an operation unit that accepts input from a user, and accepts the setting of the first time via the operation unit.

12. The ventilation and air conditioning system described in any one of claims 1 to 7, wherein the control device is provided with a communication unit that communicates with an external communication device that accepts input from a user, and obtains information indicating both or one of the volume of the target space and the first time input to the external communication device via the communication unit.

13. A ventilation and air conditioning system as described in any one of claims 1 to 7, wherein the control device includes an operation unit that accepts input from a user, and the operation unit accepts a selection of which of manual control based on instructions from the user to the ventilation device and the air conditioner is to be given priority, or automatic control based on the predicted value, and the control device gives priority to either the manual control or the automatic control selected via the operation unit.

14. A ventilation and air conditioning system as described in any one of claims 1 to 7, wherein the control device is provided with a communication unit that communicates with an external communication device that accepts input from a user, and the external communication device accepts a selection of which of manual control based on instructions from the user to the ventilation device and the air conditioner is to be prioritized, or automatic control based on the predicted value, and transmits the content of the accepted selection to the communication unit, and the control device prioritizes either the manual control or the automatic control based on the content of the selection obtained via the communication unit.

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