JP7606402B2 - Control device, air conditioning ventilation system, control method, and program - Google Patents

Description

This disclosure relates to a control device, an air conditioning and ventilation system, a control method, and a program.

In recent years, air conditioning and ventilation systems have been installed in buildings such as office buildings and commercial buildings. In these air conditioning and ventilation systems, for example, the air conditioner is controlled while the CO2 concentration in the room is measured sequentially, and when the CO2 concentration rises and exceeds a standard value, it is determined that ventilation is necessary to accommodate the increase in the number of people in the room, and the ventilation fan is operated or the ventilation volume of the operating fan is increased to improve the air environment in the room.

Furthermore, when air conditioning is controlled while operating the ventilation fan in this manner, the indoor temperature can rise or fall significantly, particularly in summer or winter, resulting in a loss of indoor comfort.
For this reason, air conditioning and ventilation systems have been developed that perform control to increase the air conditioning capacity of the air conditioner when ventilation is performed.

For example, Patent Document 1 discloses technology for an indoor unit of a ceiling-embedded air conditioner that increases the airflow volume of the air conditioner when the CO2 concentration in the room exceeds a threshold value and ventilation is performed. In other words, by controlling to increase the air conditioning capacity when ventilation is performed, an attempt is made to maintain the conditioned temperature as much as possible, thereby reducing the decrease in indoor comfort.

JP 2001-304661 A

However, the technology disclosed in the above-mentioned Patent Document 1 had the problem that it could not immediately respond to temperature changes caused by ventilation, and indoor comfort was temporarily lost until the air-conditioned temperature returned to normal.

The present disclosure has been made to solve the above problems, and aims to provide a control device, an air conditioning and ventilation system, a control method, and a program that can prevent a decrease in indoor comfort during ventilation.

In order to achieve the above object, the control device according to the present disclosure includes:
A control device that controls an air conditioner and a ventilation fan,
An acquisition means for acquiring an indoor CO2 concentration, an outside temperature, and a room temperature;
an air conditioning control means for setting an air conditioning temperature to be set in the air conditioner to an air conditioning temperature having a higher air conditioning capacity than the current air conditioning temperature in accordance with a relationship between the outside air temperature and the room temperature when the CO2 concentration acquired by the acquisition means exceeds a threshold value;
a ventilation control means for operating the ventilation fan when the room temperature acquired by the acquisition means becomes equal to the air conditioning temperature set by the air conditioning control means;
Equipped with.

In the control device of the present disclosure, an acquisition means acquires the indoor CO2 concentration, the outside temperature, and the room temperature, and when the CO2 concentration exceeds a threshold value, an air conditioning control means sets the air conditioning temperature to an air conditioning temperature with a higher air conditioning capacity than the current air conditioning temperature in accordance with the relationship between the outside temperature and the room temperature, and a ventilation control means operates the ventilation fan when the room temperature becomes equal to the air conditioning temperature.
As a result, it is possible to prevent a decrease in indoor comfort during ventilation.

FIG. 1 is a diagram illustrating an example of an overall configuration of an air conditioning and ventilation system according to a first embodiment of the present disclosure. FIG. 1 is a diagram showing an example of each configuration according to the first embodiment; FIG. 1 is a sequence diagram for explaining the overall operation of the air conditioning and ventilation system according to the first embodiment. Flowchart for explaining air conditioning ventilation control processing according to the first embodiment 1 is a flowchart for explaining a data acquisition process according to the first embodiment. Flowchart for explaining air conditioning temperature setting processing according to the first embodiment A flowchart for explaining ventilation control start processing according to the first embodiment. A flowchart for explaining an air volume control start process according to the first embodiment. A flowchart for explaining a wind direction control start process according to the first embodiment. FIG. 1 is a diagram showing an example of an overall configuration of an air conditioning ventilation system according to a second embodiment of the present disclosure. FIG. 13 is a diagram showing an example of each configuration according to a second embodiment; Flowchart for explaining air conditioning ventilation control processing according to the second embodiment 11 is a flowchart for explaining a data acquisition process according to a second embodiment. A flowchart for explaining an air conditioning temperature setting process according to a second embodiment. FIG. 13 is a diagram showing an example of the overall configuration of an air conditioning ventilation system according to a third embodiment of the present disclosure. FIG. 13 is a diagram showing an example of each configuration according to a third embodiment. Flowchart for explaining air conditioning ventilation control processing according to the third embodiment FIG. 1 is a diagram showing an example of the overall configuration of an air conditioning ventilation system according to a fourth embodiment of the present disclosure. FIG. 13 is a diagram showing an example of each configuration according to a fourth embodiment. Flowchart for explaining air conditioning ventilation control processing according to the fourth embodiment FIG. 13 is a diagram showing an example of the overall configuration of an air conditioning and ventilation system according to another embodiment;

Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. In the following embodiments, an air conditioning ventilation system having an indoor unit and a ventilation fan separately will be described, but the present disclosure can also be applied to an air conditioning ventilation system having an indoor unit with a ventilation function. That is, the embodiments described below are for explanation purposes and do not limit the scope of the present disclosure. Therefore, a person skilled in the art can adopt an embodiment in which each or all of these elements are replaced with an equivalent, and these embodiments are also included in the scope of the present disclosure. That is, the present disclosure is not limited to the embodiments described below, and can be modified in various ways without departing from the spirit of the present disclosure.
In addition, in each drawing explaining the following embodiments, common elements are given the same reference numerals.

(Embodiment 1)
1 is a diagram showing an example of the overall configuration of an air conditioning and ventilation system 1 according to a first embodiment of the present disclosure. The air conditioning and ventilation system 1 is installed in a building such as an office building or a commercial building, and controls air conditioning and ventilation in the room. The air conditioning and ventilation system 1 may be installed in each room of a detached house, an apartment, a condominium, etc.
1, the air conditioning ventilation system 1 includes a CO2 concentration sensor 10, a control device 20, an outdoor unit 30, an indoor unit 40, and a ventilation fan 50. The CO2 concentration sensor 10, the control device 20, and the indoor unit 40 are installed in an indoor space.

Figure 2 is a diagram showing an example of each component of the air conditioning ventilation system 1. Below, the CO2 concentration sensor 10, the control device 20, the outdoor unit 30, the indoor unit 40, and the ventilation fan 50 will each be described with reference to Figure 2. Note that hereinafter, the outdoor unit 30 and the indoor unit 40 may be collectively referred to as the air conditioner.

The CO2 concentration sensor 10 is a sensor device that detects the CO2 concentration in a room, and is equipped with an acquisition unit 11 and a transmission unit 12.

The acquisition unit 11 detects the CO2 concentration in the room and acquires CO2 concentration information indicating that value.

The transmitting unit 12 transmits the CO2 concentration information acquired by the acquiring unit 11 to the control device 20.

The control device 20 includes a data receiving unit 21, which is an example of an acquisition means, an air conditioning control means, an air conditioning/ventilation connection management unit 22, which is an example of a ventilation control means, and a transmission unit 23, and controls the entire air conditioning/ventilation system 1.

The data receiving unit 21 receives the CO2 concentration information transmitted from the CO2 concentration sensor 10, the outside air temperature information transmitted from the outdoor unit 30, and the room temperature information transmitted from the indoor unit 40.

The air conditioning/ventilation connection management unit 22 performs threshold determination of the CO2 concentration and sets the air conditioning control and ventilation control. Note that the air conditioning/ventilation connection management unit 22 is realized, for example, by a CPU (Central Processing Unit) using a RAM (Random Access Memory) as a work memory and appropriately executing a program stored in a ROM (Read Only Memory).

The transmission unit 23 transmits a control command to the indoor unit 40 according to the air conditioning control set by the air conditioning ventilation connection management unit 22, and also transmits a control command to the ventilation fan 50 according to the ventilation control set by the air conditioning ventilation connection management unit 22.

The outdoor unit 30 is connected to the indoor unit 40 through piping for circulating the refrigerant, and includes a receiver 31, an outdoor air temperature acquisition unit 32, and a transmitter 33. In more detail, the outdoor unit 30 further includes a compressor and a heat source side heat exchanger (not shown), and circulates the compressed refrigerant between the outdoor unit 30 and the indoor unit 40.

The receiver 31 receives various commands sent from the control device 20. For example, the receiver 31 receives a command to obtain the outside air temperature.

The outside air temperature acquisition unit 32 detects the outside air temperature and acquires outside air temperature information indicating that value.

The transmission unit 33 transmits the outside air temperature information acquired by the outside air temperature acquisition unit 32 to the control device 20.

The indoor unit 40 is connected to the outdoor unit 30 through the above-mentioned piping, and includes a receiver 41, a controller 42, a room temperature acquisition unit 43, and a transmitter 44. In more detail, the indoor unit 40 further includes an expansion valve, a load-side heat exchanger, etc. (not shown), and works together with the outdoor unit 30 to condition the air inside the room.

The receiver 41 receives various commands sent from the control device 20. For example, the receiver 41 receives control commands indicating the details of air conditioning control, commands to obtain the room temperature, etc.

The control unit 42 controls the entire indoor unit 40. For example, the control unit 42 controls the air conditioning in the room according to the control command received by the receiving unit 41.

The room temperature acquisition unit 43 detects the room temperature and acquires room temperature information indicating that value.

The transmission unit 44 transmits the room temperature information acquired by the room temperature acquisition unit 43 to the control device 20.

The ventilation fan 50 includes a receiver 51 and a controller 52, and rotates a fan (not shown) to exhaust indoor air to the outside or supply outdoor air to the room.

The receiving unit 51 receives various commands transmitted from the control device 20. For example, the receiving unit 51 receives a control command indicating the details of ventilation control.

The control unit 52 controls the entire ventilation fan 50. For example, the control unit 52 performs ventilation control according to the control command received by the receiving unit 51.

Hereinafter, the operation of the air conditioning and ventilation system 1 having such a configuration will be described in detail with reference to FIG. 3 first, and then with reference to FIGS.
FIG. 3 is a sequence diagram for explaining the overall operation of the air conditioning ventilation system 1.

As shown in FIG. 3, first, the CO2 concentration sensor 10 transmits the CO2 concentration to the control device 20 (sq1).

The control device 20 compares this CO2 concentration with a threshold value, and if it determines that the CO2 concentration exceeds the threshold value, proceeds to the subsequent sequence.
That is, the controller 20 instructs the outdoor unit 30 to obtain the outside air temperature (sq2). In response to this, the outdoor unit 30 transmits the outside air temperature to the controller 20 (sq3).
Furthermore, the controller 20 instructs the indoor unit 40 to acquire the room temperature (sq4). In response to this, the indoor unit 40 transmits the room temperature to the controller 20 (sq5).

The control device 20 sets the air conditioning temperature (sq6). For example, the control device 20 sets the air conditioning temperature by automatic adjustment using a fixed value, as described below.

The controller 20 transmits the set air conditioning temperature to the indoor unit 40 (sq7). In response to this, the indoor unit 40 operates at the set temperature (sq8).
Then, the indoor unit 40 transmits the room temperature to the controller 20 (sq9).

The control device 20 compares the room temperature with the set temperature, and if it determines that the room temperature is equal to the set temperature, it proceeds to the subsequent sequence.
That is, the control device 20 transmits a high operation setting to the ventilation fan 50 (sq10). In response to this, the ventilation fan 50 operates in high operation (sq11).
Furthermore, the controller 20 transmits the air volume and air direction settings to the indoor unit 40 (sq12). In response to this, the indoor unit 40 operates in accordance with the set conditions (sq13).

Next, the operation of the air conditioning ventilation system 1 will be described in detail with reference to FIGS.
Fig. 4 is a flowchart explaining the air conditioning ventilation control process. Also, Figs. 5 to 9 are flowcharts explaining each subroutine in the air conditioning ventilation control process of Fig. 4. That is, Fig. 5 is a flowchart explaining the data acquisition process, Fig. 6 is a flowchart explaining the air conditioning temperature setting process, Fig. 7 is a flowchart explaining the ventilation control start process, Fig. 8 is a flowchart explaining the air volume control start process, and Fig. 9 is a flowchart explaining the air direction control start process.

As shown in FIG. 4, first, the air conditioning ventilation system 1 determines whether the air conditioner is operating (step S11). That is, the control device 20 determines whether the outdoor unit 30 and the indoor unit 40 are operating.

When the air conditioning and ventilation system 1 determines that the air conditioner is not operating (step S11; No), it ends the air conditioning and ventilation control process.

On the other hand, if it is determined that the air conditioner is operating (step S11; Yes), the CO2 concentration sensor 10 acquires the CO2 concentration (step S12). In other words, the acquisition unit 11 of the CO2 concentration sensor 10 detects the CO2 concentration in the room and acquires CO2 concentration information indicating that value.

The CO2 concentration sensor 10 transmits the CO2 concentration information to the control device 20 (step S13). That is, the transmission unit 12 of the CO2 concentration sensor 10 transmits the CO2 concentration information acquired in step S12 above to the control device 20.

The air conditioning ventilation system 1 determines whether the CO2 concentration exceeds a threshold value (step S14). In other words, the control device 20 determines whether the current CO2 concentration detected by the CO2 concentration sensor 10 exceeds a threshold value. The threshold value is set to a CO2 concentration value at which ventilation is required.

When the air conditioning ventilation system 1 determines that the CO2 concentration does not exceed the threshold value (step S14; No), it returns the process to step S12 described above.

On the other hand, if it is determined that the CO2 concentration exceeds the threshold value (step S14; Yes), the air conditioning ventilation system 1 executes a data acquisition process (step S15).
In addition, although details will be described later, the outside temperature and the room temperature are acquired in the data acquisition process.
This data acquisition process is an example of an acquisition step.

The air conditioning ventilation system 1 executes an air conditioning temperature setting process (step S16).
Although details will be described later, in the air conditioning temperature setting process, the air conditioning temperature to be set in the indoor unit 40 is determined.
This air conditioning temperature setting process is an example of an air conditioning control step.

The control device 20 transmits the set temperature information to the indoor unit 40 (step S17). That is, the control device 20 transmits to the indoor unit 40 set temperature information indicating the content of the air conditioning temperature set in step S16 above.

The indoor unit 40 starts operating at the set temperature (step S18). That is, the control unit 42 of the indoor unit 40 starts air conditioning control of the air conditioning temperature according to the set temperature information sent from the control device 20 in step S17 above.

The indoor unit 40 acquires the room temperature (step S19). That is, the room temperature acquisition unit 43 of the indoor unit 40 detects the room temperature and acquires room temperature information indicating that value.

The indoor unit 40 transmits the room temperature information to the control device 20 (step S20). That is, the transmission unit 44 of the indoor unit 40 transmits the room temperature information acquired in step S19 above to the control device 20.

The air conditioning and ventilation system 1 determines whether the room temperature is equal to the set temperature (step S21). That is, the control device 20 determines whether the room temperature has reached the set temperature when the indoor unit 40 starts operating at the set temperature in step S18 described above.

If the air conditioning and ventilation system 1 determines that the room temperature is not equal to the set temperature (step S21; No), it returns the process to step S19 described above.

On the other hand, if it is determined that the room temperature is equal to the set temperature (step S21; Yes), the air conditioning ventilation system 1 executes a ventilation control start process (step S22).
In addition, although details will be described later, in the ventilation control start process, the ventilation fan 50 is operated at high power.
This ventilation control start process is an example of a ventilation control step.

The air conditioning ventilation system 1 executes an air volume control start process (step S23).
It should be noted that, although details will be described later, in the air volume control start process, the indoor unit 40 is operated at the maximum air volume.

The air conditioning ventilation system 1 executes an airflow direction control start process (step S24).
Although details will be described later, in the air volume control start process, the airflow direction is swung to operate the indoor unit 40.

Next, the details of the data acquisition process executed in step S15 in the above air conditioning ventilation control process will be described with reference to the flowchart in FIG.

In the data acquisition process of FIG. 5, first, the control device 20 transmits an outside air temperature acquisition command to the outdoor unit 30 (step S31). That is, the transmission unit 23 of the control device 20 transmits an outside air temperature acquisition command to the outdoor unit 30.

The outdoor unit 30 acquires the outside air temperature (step S32). That is, the outside air temperature acquisition unit 32 of the outdoor unit 30 detects the outdoor temperature and acquires outside air temperature information indicating that value.

The outdoor unit 30 transmits the outside air temperature information to the control device 20 (step S33). That is, the transmission unit 33 of the outdoor unit 30 transmits the outside air temperature information acquired in step S32 above to the control device 20.

The control device 20 transmits a room temperature acquisition command to the indoor unit 40 (step S34). That is, the transmission unit 23 of the control device 20 transmits the room temperature acquisition command to the indoor unit 40.

The indoor unit 40 acquires the room temperature (step S35). That is, the room temperature acquisition unit 43 of the indoor unit 40 detects the room temperature and acquires room temperature information indicating that value.

The indoor unit 40 transmits the room temperature information to the control device 20 (step S36). That is, the transmission unit 44 of the indoor unit 40 transmits the room temperature information acquired in step S35 above to the control device 20.

Then, the air conditioning and ventilation system 1 finishes the data acquisition process and returns to the air conditioning and ventilation control process of Figure 4.

Next, the details of the air conditioning temperature setting process executed in step S16 in the air conditioning ventilation control process of FIG. 4 will be described with reference to the flowchart of FIG. 6.

In the air conditioning temperature setting process in FIG. 6, first, the air conditioning ventilation system 1 determines whether the air conditioner is operating in cooling mode (step S41). In other words, the control device 20 determines whether it has instructed the indoor unit 40 to control the air conditioning to operate in cooling mode.

When the air conditioning and ventilation system 1 determines that the air conditioner is operating in cooling mode (step S41; Yes), it determines whether the room temperature is equal to or lower than the outside air temperature (step S42). That is, the control device 20 compares the room temperature and the outside air temperature acquired in the data acquisition process of FIG. 5 described above to determine whether the room temperature is equal to or lower than the outside air temperature.

When the air conditioning and ventilation system 1 determines that the room temperature is not lower than the outside air temperature (step S42; No), it ends the air conditioning temperature setting process and returns to the air conditioning and ventilation control process of FIG. 4. In other words, since the outside air temperature is lower than the room temperature, the room temperature will not increase due to ventilation, and the air conditioning and ventilation system 1 ends the air conditioning temperature setting process without setting the air conditioning temperature.

On the other hand, if it is determined that the room temperature is equal to or lower than the outside air temperature (step S42; Yes), the control device 20 sets the air conditioning temperature to 2°C lower than the current air conditioning temperature (step S43). In other words, the air conditioning/ventilation connection management unit 22 of the control device 20 sets the air conditioning temperature 2°C lower. Note that this 2°C is just an example, and the air conditioning temperature may be set lower to another temperature. For example, the air conditioning/ventilation connection management unit 22 may set the air conditioning temperature lower to a temperature previously determined by the user.

In addition, if it is determined in step S41 that the indoor unit 40 is not operating in cooling mode (step S41; No), the air conditioning ventilation system 1 determines whether the air conditioner is operating in heating mode (step S44). In other words, the control device 20 determines whether it has instructed the indoor unit 40 to perform air conditioning control for heating operation.

When the air conditioning and ventilation system 1 determines that the air conditioner is not operating in heating mode (step S44; No), it ends the air conditioning temperature setting process and returns to the air conditioning and ventilation control process of FIG. 4.

On the other hand, if it is determined that the air conditioner is operating in heating mode (step S44; Yes), the air conditioning and ventilation system 1 determines whether the room temperature is higher than the outside air temperature (step S45). That is, the control device 20 compares the room temperature and the outside air temperature acquired in the data acquisition process of FIG. 5 to determine whether the room temperature is higher than the outside air temperature.

When the air conditioning and ventilation system 1 determines that the room temperature is not higher than the outside air temperature (step S45; No), it ends the air conditioning temperature setting process and returns to the air conditioning and ventilation control process of FIG. 4. In other words, since the room temperature is equal to or lower than the outside air temperature, the room temperature will not drop due to ventilation, and the air conditioning and ventilation system 1 ends the air conditioning temperature setting process without setting the air conditioning temperature.

On the other hand, if it is determined that the room temperature is higher than the outside air temperature (step S45; Yes), the control device 20 sets the air conditioning temperature 2°C higher than the current air conditioning temperature (step S46). That is, the air conditioning/ventilation connection management unit 22 of the control device 20 sets the air conditioning temperature 2°C higher. Note that this 2°C is just an example, and the air conditioning temperature may be set higher up to another temperature. For example, the air conditioning/ventilation connection management unit 22 may set the air conditioning temperature higher up to a temperature previously determined by the user.

Then, the air conditioning ventilation system 1 finishes the air conditioning temperature setting process and returns to the air conditioning ventilation control process of Figure 4.

Next, the ventilation control start process executed in step S22 of the air conditioning ventilation control process in FIG. 4 will be described in detail with reference to the flowchart in FIG. 7.

In the ventilation control start process of FIG. 7, first, the control device 20 sets the operation of the ventilation fan 50 to high operation (step S51). That is, the air conditioning ventilation connection management unit 22 of the control device 20 sets the operation to be determined for the ventilation fan 50 to high operation.

The control device 20 transmits strong operation information to the ventilation fan 50 (step S52). That is, the transmission unit 23 of the control device 20 transmits strong operation information indicating the strong operation set in step S51 above to the ventilation fan 50.

The ventilation fan 50 operates at high power (step S53). That is, in response to the high power operation information transmitted from the control device 20 in step S52 above, the ventilation fan 50 operates at high power.

Then, the air conditioning and ventilation system 1 finishes the ventilation control start process and returns to the air conditioning and ventilation control process of Figure 4.

Next, the details of the air volume control start process executed in step S23 in the air conditioning ventilation control process in FIG. 4 will be described with reference to the flowchart in FIG. 8.

In the air volume control start process of FIG. 8, first, the control device 20 sets the air volume of the indoor unit 40 to the maximum air volume (step S61). That is, the air conditioning ventilation connection management unit 22 of the control device 20 sets the air volume set for the indoor unit 40 to the maximum air volume.

The control device 20 transmits maximum air volume information to the indoor unit 40 (step S62). That is, the transmission unit 23 of the control device 20 transmits maximum air volume information indicating the maximum air volume set in step S61 above to the indoor unit 40.

The indoor unit 40 operates at the maximum air volume (step S63). That is, in response to the maximum air volume information transmitted from the control device 20 in step S62 above, the indoor unit 40 operates at the maximum air volume.

Then, the air conditioning and ventilation system 1 finishes the air volume control start process and returns to the air conditioning and ventilation control process of FIG. 4.

Next, the details of the airflow direction control start process executed in step S24 in the air conditioning ventilation control process of FIG. 4 will be described with reference to the flowchart of FIG. 9.

In the airflow direction control start process of FIG. 9, first, the control device 20 sets the airflow direction of the indoor unit 40 to swing (step S71). That is, the air conditioning ventilation connection management unit 22 of the control device 20 sets the airflow direction determined for the indoor unit 40 to swing.

The control device 20 transmits the wind direction information to the indoor unit 40 (step S72). That is, the transmission unit 23 of the control device 20 transmits wind direction information indicating the swing set in step S71 above to the indoor unit 40.

The indoor unit 40 swings the airflow direction (step S73). That is, in response to the airflow direction information transmitted from the control device 20 in step S72 above, the indoor unit 40 operates by swinging the airflow direction.

Then, the air conditioning and ventilation system 1 finishes the air direction control start process and returns to the air conditioning and ventilation control process of FIG. 4.

By performing each process centered on the air conditioning ventilation control process of Figure 4, the room temperature is automatically adjusted before the ventilation fan 50 is operated at high power, so that when the ventilation fan 50 is operated at high power, the room temperature is prevented from rising in summer and from falling in winter, thereby preventing a decrease in indoor comfort.
Moreover, when the ventilation fan 50 is operated at high speed, the air volume of the indoor unit 40 is maximized and the air direction is swung, which promotes the circulation of stagnant air in the room and reduces the CO2 concentration, thereby quickly improving the air environment.

(Embodiment 2)
In the above embodiment 1, a case has been described in which the air conditioning temperature is raised or lowered by a fixed temperature before the ventilation fan 50 is operated at high speed. However, it is also possible to actually learn the change in room temperature during ventilation and appropriately adjust the air conditioning temperature according to the environment.
Hereinafter, an air conditioning and ventilation system 2 according to a second embodiment will be described, which is characterized by learning the change in room temperature during ventilation and appropriately adjusting the air conditioning temperature before ventilation.

10 is a diagram illustrating an example of an overall configuration of an air conditioning and ventilation system 2 according to a second embodiment of the present disclosure. Like the first embodiment, this air conditioning and ventilation system 2 also controls air conditioning and ventilation in a room of a building.
10, the air conditioning ventilation system 2 includes a CO2 concentration sensor 10, a control device 60, an outdoor unit 30, an indoor unit 40, a ventilation fan 50, and a server 70. The CO2 concentration sensor 10, the control device 60, and the indoor unit 40 are installed in an indoor space. The server 70 is connected to the control device 60 so as to be able to communicate with each other via a network N such as the Internet.

11 is a diagram showing an example of each component of the air conditioning ventilation system 2. Note that the configurations of the CO2 concentration sensor 10, the outdoor unit 30, the indoor unit 40, and the ventilation fan 50 are similar to those of the air conditioning ventilation system 1 in FIG.
Therefore, the control device 60 and the server 70 will be described with reference to FIG.

The control device 60 includes a data receiving unit 21, an air conditioning/ventilation connection management unit 22, a transmission unit 23, a data acquisition unit 61, a data storage unit 62, a learning unit 63 which is an example of a learning means, and a model storage unit 64, and controls the entire air conditioning/ventilation system 2. The data receiving unit 21, the air conditioning/ventilation connection management unit 22, and the transmission unit 23 have the same configuration as the control device 20 in FIG.
Therefore, the data acquisition unit 61, the data storage unit 62, the learning unit 63, and the model storage unit 64 will be described.

The data acquisition unit 61 acquires weather information from the server 70.

The data storage unit 62 stores data necessary for learning by the learning unit 63. For example, the data storage unit 62 stores outside air temperature information transmitted from the outdoor unit 30 and room temperature information transmitted from the indoor unit 40 in addition to the weather information acquired by the data acquisition unit 61.

The learning unit 63 learns the degree of change in room temperature during ventilation. For example, the learning unit 63 learns the degree to which the room temperature changes based on the weather information and the inside and outside temperatures while the ventilation fan 50 is operating at high power.

The model storage unit 64 stores the learning model generated as a result of learning by the learning unit 63.

The server 70 provides weather information via the network N and includes a weather information storage unit 71.

The weather information storage unit 71 accumulates and stores weather information for each region.

The operation of the air conditioning and ventilation system 2 configured as above will be described below with reference to FIGS.
Fig. 12 is a flowchart illustrating an air conditioning ventilation control process according to embodiment 2. Fig. 13 is a flowchart illustrating a data acquisition process in the air conditioning ventilation control process of Fig. 12. Fig. 14 is a flowchart illustrating an air conditioning temperature setting process in the air conditioning ventilation control process of Fig. 12.

First, the air conditioning and ventilation control process in Fig. 12 will be described. Note that in the air conditioning and ventilation control process in Fig. 12, the same process contents as those in the air conditioning and ventilation control process in Fig. 4 according to the above-mentioned first embodiment are denoted by the same reference numerals.
In other words, in the air conditioning and ventilation control process of FIG. 12, the data acquisition process shown in step S15α and the air conditioning temperature setting process shown in step S16α differ from the air conditioning and ventilation control process of FIG. 4, and the other processes are the same as the air conditioning and ventilation control process of FIG. 4.
Therefore, the air conditioning ventilation control process in FIG. 12 will be briefly explained, and then the data acquisition process shown in step S15α and the air conditioning temperature setting process shown in step S16α will be explained with reference to FIG. 13 and FIG.

As shown in FIG. 12, first, the air conditioning and ventilation system 2 determines whether the air conditioner is operating (step S11), and if it determines that the air conditioner is not operating (step S11; No), it ends the air conditioning and ventilation control process.

On the other hand, if it is determined that the air conditioner is operating (step S11; Yes), the CO2 concentration sensor 10 acquires the CO2 concentration (step S12) and transmits the CO2 concentration information to the control device 60 (step S13).

The air conditioning ventilation system 2 determines whether the CO2 concentration exceeds the threshold value (step S14), and if it determines that the CO2 concentration does not exceed the threshold value (step S14; No), it returns the process to step S12 described above.

On the other hand, if it is determined that the CO2 concentration exceeds the threshold value (step S14; Yes), the air conditioning ventilation system 2 executes a data acquisition process (step S15α).
In addition, although details will be described later, in the data acquisition process, outside temperature information, room temperature information, and weather information are acquired.

The air conditioning ventilation system 2 executes an air conditioning temperature setting process (step S16α).
Note that, although details will be described later, in this air conditioning temperature setting process, the air conditioning temperature to be set in the indoor unit 40 is determined based on learning by the learning section 63.

The control device 20 transmits the set temperature information to the indoor unit 40 (step S17), and the indoor unit 40 starts operating at the set temperature (step S18).

The indoor unit 40 acquires the room temperature (step S19) and transmits the room temperature information to the control device 60 (step S20).

The air conditioning and ventilation system 2 determines whether the room temperature is equal to the set temperature (step S21), and if it determines that the room temperature is not equal to the set temperature (step S21; No), it returns to the process of step S19 described above.

On the other hand, if it is determined that the room temperature is equal to the set temperature (step S21; Yes), the air conditioning ventilation system 2 executes a ventilation control start process (step S22), an air volume control start process (step S23), and an air direction control start process (step S24).

Next, details of the data acquisition process executed in step S15α in the air conditioning ventilation control process in FIG. 12 will be described with reference to the flowchart in FIG.
In the data acquisition process in FIG. 13, the same process contents as those in the data acquisition process in FIG. 5 according to the above-described first embodiment are denoted by the same reference numerals.
In other words, in the data acquisition process of FIG. 13, steps S31 to S36 are the same as the data acquisition process of FIG. 5, but steps S81 to S83 are added thereafter, which is what makes the data acquisition process of FIG. 13 different from that of FIG.
Therefore, steps S31 to S36 will be explained briefly.

In the data acquisition process of FIG. 13, first, the control device 60 sends an outside air temperature acquisition command to the outdoor unit 30 (step S31), and then the outdoor unit 30 acquires the outside air temperature (step S32) and transmits the outside air temperature information to the control device 60 (step S33).

The control device 60 sends a room temperature acquisition command to the indoor unit 40 (step S34), and the indoor unit 40 acquires the room temperature (step S35) and sends the room temperature information to the control device 60 (step S36).

The control device 60 stores the room temperature information and the outside temperature information (step S81). That is, the control device 60 stores in the data storage unit 62 the outside temperature information transmitted from the outdoor unit 30 in step S33 described above and the room temperature information transmitted from the indoor unit 40 in step S36 described above.

The control device 60 acquires weather information from the server 70 (step S82). That is, the data acquisition unit 61 of the control device 60 acquires weather information from the server 70.

The control device 60 stores the weather information (step S83). In other words, the control device 60 stores the weather information acquired in step S82 above in the data storage unit 62.

Then, the air conditioning and ventilation system 2 completes the data acquisition process and returns to the air conditioning and ventilation control process of FIG. 12.

Next, details of the air conditioning temperature setting process executed in step S16α in the air conditioning ventilation control process of FIG. 12 will be described with reference to the flowchart of FIG.
In the air conditioning temperature setting process in FIG. 14, the same process contents as those in the air conditioning temperature setting process in FIG. 6 according to the above-described first embodiment are denoted by the same reference numerals.
14, steps S41, S42, S44, and S45 are the same as those in the air conditioning temperature setting process of FIG. 6, but steps S91 to S96 are different from those in the air conditioning temperature setting process of FIG.
Therefore, steps S41, S42, S44, and S45 will be explained briefly.

In the air conditioning temperature setting process of FIG. 14, the air conditioning ventilation system 2 first determines whether the air conditioner is operating in cooling mode (step S41), and if it determines that the air conditioner is operating in cooling mode (step S41; Yes), it determines whether the room temperature is equal to or lower than the outside air temperature (step S42).

If the air conditioning and ventilation system 2 determines that the room temperature is not lower than the outside air temperature (step S42; No), it ends the air conditioning temperature setting process and returns to the air conditioning and ventilation control process of FIG. 12.

On the other hand, if it is determined that the room temperature is equal to or lower than the outside temperature (step S42; Yes), the air conditioning and ventilation system 2 learns the degree to which the current room temperature changes due to ventilation based on a regression model, according to the acquired indoor and outdoor temperatures and weather information (step S91). For example, the learning unit 63 learns how much the room temperature will rise while the ventilation fan 50 is operating at high speed, based on the room temperature, the outside temperature, and the weather information.

The control device 60 saves the learning results (step S92). In other words, the control device 60 stores the learning model generated as a result of learning by the learning unit 63 in the data storage unit 62.

The control device 60 sets an air conditioning temperature that is lower than the current air conditioning temperature by the amount of the temperature change (step S93). In other words, the air conditioning ventilation connection management unit 22 of the control device 60 sets the air conditioning temperature lower by the amount of temperature that corresponds to the degree of change learned in step S91 described above.

Furthermore, if it is determined in step S41 described above that the air conditioner is not operating in cooling mode (step S41; No), the air conditioning and ventilation system 2 determines whether the air conditioner is operating in heating mode (step S44), and if it determines that the air conditioner is not operating in heating mode (step S44; No), it ends the air conditioning temperature setting process and returns to the air conditioning and ventilation control process of FIG. 12.

On the other hand, if it is determined that the air conditioner is operating in heating mode (step S44; Yes), the air conditioning and ventilation system 2 determines whether the room temperature is higher than the outside air temperature (step S45), and if it determines that the room temperature is not higher than the outside air temperature (step S45; No), it ends the air conditioning temperature setting process and returns to the air conditioning and ventilation control process of FIG. 12.

On the other hand, if it is determined that the room temperature is higher than the outside air temperature (step S45; Yes), the air conditioning and ventilation system 2 learns the degree of change in the current room temperature due to ventilation based on a regression model, according to the acquired indoor and outdoor air temperatures and weather information (step S94). For example, the learning unit 63 learns how much the room temperature will drop while the ventilation fan 50 is operating at high power, based on the room temperature, the outside air temperature, and the weather information.

The control device 60 saves the learning results (step S95). In other words, the control device 60 stores the learning model generated as a result of learning by the learning unit 63 in the data storage unit 62.

The control device 60 sets an air conditioning temperature that is higher than the current air conditioning temperature by the amount of the temperature change (step S96). In other words, the air conditioning ventilation connection management unit 22 of the control device 60 sets the air conditioning temperature higher by the amount of temperature that corresponds to the degree of change learned in step S94 described above.

Then, the air conditioning ventilation system 2 finishes the air conditioning temperature setting process and returns to the air conditioning ventilation control process of FIG. 12.

By performing each process centered on the air conditioning ventilation control process of Figure 12, the room temperature is automatically adjusted according to the learned degree of change in room temperature before operating the ventilation fan 50 at high power, so that when the ventilation fan 50 is operated at high power, the room temperature is prevented from rising in summer and from falling in winter, thereby preventing a decrease in indoor comfort.
Moreover, when the ventilation fan 50 is operated at high speed, the air volume of the indoor unit 40 is maximized and the air direction is swung, which promotes the circulation of stagnant air in the room and reduces the CO2 concentration, thereby quickly improving the air environment.

(Embodiment 3)
In the above embodiments 1 and 2, the setting of the air conditioning temperature before ventilation is started after the CO2 concentration exceeds the threshold value. However, even before the CO2 concentration exceeds the threshold value, if the CO2 concentration shows an increasing tendency, the setting of the air conditioning temperature before ventilation may be started.
Hereinafter, an air conditioning ventilation system 3 according to a third embodiment will be described, which is characterized in that setting of the air conditioning temperature before ventilation is started even when the CO2 concentration is on the rise.

15 is a diagram illustrating an example of an overall configuration of an air conditioning and ventilation system 3 according to a third embodiment of the present disclosure. Like the first embodiment, this air conditioning and ventilation system 3 also controls air conditioning and ventilation in a room of a building.
15, the air conditioning ventilation system 3 includes a CO2 concentration sensor 10, a control device 80, an outdoor unit 30, an indoor unit 40, and a ventilation fan 50. The CO2 concentration sensor 10, the control device 80, and the indoor unit 40 are installed in an indoor space.

16 is a diagram showing an example of each component of the air conditioning ventilation system 3. Note that the configurations of the CO2 concentration sensor 10, the outdoor unit 30, the indoor unit 40, and the ventilation fan 50 are similar to those of the air conditioning ventilation system 1 in FIG.
Therefore, the control device 80 will be described with reference to FIG.

The control device 80 includes a data receiving unit 21, an air conditioning/ventilation connection management unit 22, a transmitting unit 23, a data storage unit 81, and an estimation unit 82 which is an example of an estimation means, and controls the entire air conditioning/ventilation system 3. The data receiving unit 21, the air conditioning/ventilation connection management unit 22, and the transmitting unit 23 have the same configuration as the control device 20 in FIG.
Therefore, the data storage unit 81 and the estimation unit 82 will be described.

The data storage unit 81 stores data necessary for estimation by the estimation unit 82. For example, the data storage unit 81 stores the CO2 concentration sequentially acquired by the CO2 concentration sensor 10 in chronological order.

The estimation unit 82 estimates the time when the CO2 concentration will exceed the threshold value from the increasing trend of the CO2 concentration. For example, the estimation unit 82 grasps the increasing trend of the CO2 concentration from the current CO2 concentration acquired by the CO2 concentration sensor 10 and the past CO2 concentrations stored in the data storage unit 81, and estimates the time when the CO2 concentration will exceed the threshold value.

Hereinafter, the operation of the air conditioning and ventilation system 3 configured as above will be described with reference to Fig. 17. Fig. 17 is a flowchart illustrating the air conditioning and ventilation control process according to the third embodiment.
In the air conditioning and ventilation control process in FIG. 17, the same process contents as those in the air conditioning and ventilation control process in FIG. 4 according to the first embodiment are denoted by the same reference numerals.
In other words, in the air conditioning and ventilation control process of FIG. 17, the processes shown in steps S101 and S102 differ from the air conditioning and ventilation control process of FIG. 4, and also differ from the air conditioning and ventilation control process of FIG. 4 in that the order of the air direction control start process shown in step S24 has been moved forward, but the other processes are the same as the air conditioning and ventilation control process of FIG. 4.
Therefore, the processing contents that are the same as the air conditioning ventilation control processing in FIG. 4 will be explained briefly.

As shown in FIG. 17, first, the air conditioning and ventilation system 3 determines whether the air conditioner is operating (step S11), and if it determines that the air conditioner is not operating (step S11; No), it ends the air conditioning and ventilation control process.

On the other hand, if it is determined that the air conditioner is operating (Step S11; Yes), the air conditioning and ventilation system 3 executes an airflow direction control start process (Step S24).
Incidentally, by executing the air volume control start process at this timing, the air direction is swung to operate the indoor unit 40, thereby eliminating stagnant air and creating air flow so as to prevent the CO2 concentration from increasing.

The CO2 concentration sensor 10 acquires the CO2 concentration (step S12) and transmits the CO2 concentration information to the control device 20 (step S13).

The air conditioning ventilation system 3 determines whether the CO2 concentration exceeds the threshold value (step S101), and if it determines that the CO2 concentration does not exceed the threshold value (step S101; No), it determines whether the CO2 concentration is on an upward trend (step S102). For example, the estimation unit 82 of the control device 80 determines whether the CO2 concentration is on an upward trend based on the current CO2 concentration transmitted from the CO2 concentration sensor 10 in step S13 described above and the past CO2 concentrations stored in the data storage unit 81.

If the air conditioning ventilation system 3 determines that the CO2 concentration is not on an upward trend (step S102; No), it returns the process to step S24 described above.

On the other hand, if it is determined that the CO2 concentration exceeds the threshold value (step S101; Yes), or if it is determined that the CO2 concentration is on the rise (step S102; Yes), the air conditioning ventilation system 3 executes a data acquisition process (step S15) and then executes an air conditioning temperature setting process (step S16).
In addition to when it is determined that the CO2 concentration is on an upward trend, if the time at which the CO2 concentration will exceed the threshold value, as estimated by the estimation unit 82, is within a certain period of time, the process may proceed to step S15.

The control device 20 transmits the set temperature information to the indoor unit 40 (step S17), and the indoor unit 40 starts operating at the set temperature (step S18).

The indoor unit 40 acquires the room temperature (step S19) and transmits the room temperature information to the control device 20 (step S20).

The air conditioning and ventilation system 3 determines whether the room temperature is equal to the set temperature (step S21), and if it determines that the room temperature is not equal to the set temperature (step S21; No), it returns to the process of step S19 described above.

On the other hand, if it is determined that the room temperature is equal to the set temperature (step S21; Yes), the air conditioning ventilation system 3 executes a ventilation control start process (step S22) and then executes an air volume control start process (step S23).

By performing each process centered on the air conditioning ventilation control process of FIG. 17, even if the CO2 concentration does not exceed the threshold value, if the CO2 concentration is tending to increase, the room temperature is automatically adjusted before operating the ventilation fan 50 at high power. This makes it possible to prevent a decrease in indoor comfort by preventing the room temperature from rising in summer and the room temperature from falling in winter when the ventilation fan 50 is operated at high power.
Moreover, when the ventilation fan 50 is operated at high speed, the air volume of the indoor unit 40 which swings the air direction is maximized, which promotes the circulation of stagnant air in the room and reduces the CO2 concentration, thereby quickly improving the air environment.

(Embodiment 4)
In the above embodiments 1 to 3, a case has been described in which indoor comfort is prioritized, and when the CO2 concentration increases, setting of the air conditioning temperature before ventilation is started, and ventilation is started when the set air conditioning temperature is reached. However, in addition to prioritizing comfort, it is also possible to prioritize ventilation or air conditioning.
Below, we will explain the air conditioning and ventilation system 4 of embodiment 4, which is characterized in that the user can freely select from among comfort priority mode, ventilation priority mode, and air conditioning priority mode, and air conditioning control and ventilation control are performed according to the selected mode.

18 is a diagram illustrating an example of an overall configuration of an air conditioning and ventilation system 4 according to embodiment 4 of the present disclosure. Like embodiment 1, this air conditioning and ventilation system 4 also controls air conditioning and ventilation in a room of a building.
18, the air conditioning ventilation system 4 includes a CO2 concentration sensor 10, a control device 90, an outdoor unit 30, an indoor unit 40, and a ventilation fan 50. The CO2 concentration sensor 10, the control device 90, and the indoor unit 40 are installed in an indoor space.

19 is a diagram showing an example of each component of the air conditioning ventilation system 4. Note that the configurations of the CO2 concentration sensor 10, the outdoor unit 30, the indoor unit 40, and the ventilation fan 50 are similar to those of the air conditioning ventilation system 1 in FIG.
Therefore, the control device 90 will be described with reference to FIG.

The control device 90 includes a data receiving unit 21, an air conditioning/ventilation connection management unit 22, a transmitting unit 23, and a mode setting unit 91 which is an example of a mode setting means, and controls the entire air conditioning/ventilation system 4. The data receiving unit 21, the air conditioning/ventilation connection management unit 22, and the transmitting unit 23 have the same configuration as the control device 20 in FIG.
Therefore, the mode setting unit 91 will be described.

The mode setting unit 91 sets the mode of the air conditioner according to a user's instruction. For example, the mode setting unit 91 sets one of a comfort priority mode that prioritizes indoor comfort, a ventilation priority mode that prioritizes indoor ventilation, and an air conditioning priority mode that prioritizes indoor air conditioning according to a user's instruction.
The comfort priority mode may be the first mode, and the ventilation priority mode may be the second mode. The comfort priority mode, the ventilation priority mode, and the air conditioning priority mode are merely examples, and any mode may be set from among modes further including, for example, a power saving priority mode that prioritizes power saving.

Hereinafter, the operation of the air conditioning and ventilation system 4 configured as above will be described with reference to Fig. 20. Fig. 20 is a flowchart illustrating the air conditioning and ventilation control process according to the fourth embodiment.
In the air conditioning and ventilation control process in FIG. 20, the same process contents as those in the air conditioning and ventilation control process in FIG. 4 according to the first embodiment are denoted by the same reference numerals.
That is, in the air conditioning and ventilation control process in FIG. 20, the processes shown in steps S111 and S112 are different from the air conditioning and ventilation control process in FIG. 4, but the other processes are the same as the air conditioning and ventilation control process in FIG.
Therefore, the processing contents that are the same as the air conditioning ventilation control processing in FIG. 4 will be explained briefly.

As shown in FIG. 20, first, the air conditioning and ventilation system 4 determines whether the air conditioner is operating (step S11), and if it determines that the air conditioner is not operating (step S11; No), it ends the air conditioning and ventilation control process.

On the other hand, if it is determined that the air conditioner is operating (step S11; Yes), the air conditioning ventilation system 4 determines whether the set mode is the air conditioning priority mode (step S111). In other words, the control device 90 determines whether the current mode set in the mode setting unit 91 is the air conditioning priority mode.

When the air conditioning ventilation system 4 determines that it is in air conditioning priority mode (step S111; Yes), it ends the air conditioning ventilation control process.

On the other hand, if it is determined that the air conditioning priority mode is not selected (step S111; No), the CO2 concentration sensor 10 acquires the CO2 concentration (step S12) and transmits the CO2 concentration information to the control device 90 (step S13).

The air conditioning ventilation system 4 determines whether the CO2 concentration exceeds the threshold value (step S14), and if it determines that the CO2 concentration does not exceed the threshold value (step S14; No), it returns the process to step S12 described above.

On the other hand, if it is determined that the CO2 concentration exceeds the threshold value (step S14; Yes), the air conditioning ventilation system 4 determines whether the set mode is the comfort priority mode or not (step S112). In other words, the control device 90 determines whether the current mode set in the mode setting unit 91 is the comfort priority mode or not.

If the air conditioning and ventilation system 4 determines that it is not in the comfort priority mode (step S112; No), that is, that it is in the ventilation priority mode, it proceeds to step S22, which will be described later.

On the other hand, if it is determined that the mode is comfort priority mode (step S112; Yes), the air conditioning ventilation system 4 executes a data acquisition process (step S15) and then executes an air conditioning temperature setting process (step S16).

The control device 90 transmits the set temperature information to the indoor unit 40 (step S17), and the indoor unit 40 starts operating at the set temperature (step S18).

The indoor unit 40 acquires the room temperature (step S19) and transmits the room temperature information to the control device 90 (step S20).

The air conditioning and ventilation system 3 determines whether the room temperature is equal to the set temperature (step S21), and if it determines that the room temperature is not equal to the set temperature (step S21; No), it returns to the process of step S19 described above.

On the other hand, if it is determined that the room temperature is equal to the set temperature (step S21; Yes), or if it is determined in the above-mentioned step S112 that the mode is ventilation priority mode, the air conditioning ventilation system 3 executes ventilation control start processing (step S22), executes air volume control start processing (step S23), and then executes air direction control start processing (step S24).

By performing each process centered on the air conditioning and ventilation control process in Fig. 20, the user can freely select from the comfort priority mode, the ventilation priority mode, and the air conditioning priority mode, and air conditioning control and ventilation control can be performed according to the user's preference and situation. When the comfort priority mode is selected, the room temperature is automatically adjusted before the ventilation fan 50 is operated at high power, so that when the ventilation fan 50 is operated at high power, the room temperature rise is suppressed in summer and the room temperature drop is suppressed in winter, thereby preventing a decrease in indoor comfort.
Moreover, when the ventilation fan 50 is operated at high speed, the air volume of the indoor unit 40 is maximized and the air direction of the indoor unit 40 is swung, which promotes the circulation of stagnant air in the room and reduces the CO2 concentration, thereby quickly improving the air environment.

Other Embodiments
In the above embodiments 1 to 4, the outdoor unit 30, the indoor unit 40, and the ventilation fan 50 are controlled using the control devices 20, 60, 80, and 90 installed indoors. However, a cloud server corresponding to the control devices 20, 60, 80, and 90 may be installed externally, and the outdoor unit 30, the indoor unit 40, and the ventilation fan 50 may be controlled using this cloud server.

Below, with reference to FIG. 21, we will briefly explain an air conditioning and ventilation system 5 according to another embodiment, which is characterized in that the outdoor unit 30, the indoor unit 40, and the ventilation fan 50 are controlled using a cloud server 110 on a network N, such as the Internet.

21 is a diagram showing an example of the overall configuration of an air conditioning and ventilation system 5 according to another embodiment. Like the first embodiment, this air conditioning and ventilation system 5 also controls air conditioning and ventilation in the rooms of a building.
21 , the air conditioning ventilation system 5 includes a CO2 concentration sensor 10, a router 100, an outdoor unit 30, an indoor unit 40, a ventilation fan 50, and a cloud server 110. The CO2 concentration sensor 10, the router 100, and the indoor unit 40 are installed in an indoor space. The cloud server 110 is connected to the router 100 so as to be able to communicate with each other via a network N such as the Internet.

The router 100 is a communication device that relays communications between inside the building and the network N.
For example, the router 100 transmits CO2 concentration information acquired by the CO2 concentration sensor 10 to the cloud server 110 via the network N. The router 100 also transmits outside air temperature information acquired by the outdoor unit 30 and room temperature information acquired by the indoor unit 40 to the cloud server 110 via the network N. The router 100 also transmits various commands transmitted from the cloud server 110 via the network N to the outdoor unit 30, the indoor unit 40, and the ventilation fan 50.

The cloud server 110 is, for example, a server computer, and has a configuration similar to any one of the control devices 20, 60, 80, 90 described above. It communicates with the CO2 concentration sensor 10, the outdoor unit 30, the indoor unit 40, and the ventilation fan 50 via the router 100, and performs processing similar to the air conditioning and ventilation control processing shown in any one of Figures 4, 12, 17, and 20 described above, to perform air conditioning control and ventilation control.

Even when a cloud server 110 equivalent to the control devices 20, 60, 80, 90 is installed externally as in this type of air conditioning and ventilation system 5, the room temperature can be automatically adjusted before the ventilation fan 50 is operated at high power, thereby preventing a decrease in indoor comfort by preventing a rise in room temperature in summer and a fall in room temperature in winter when the ventilation fan 50 is operated at high power.
Moreover, when the ventilation fan 50 is operated at high speed, the air volume of the indoor unit 40 is maximized and the air direction of the indoor unit 40 is swung, which promotes the circulation of stagnant air in the room and reduces the CO2 concentration, thereby quickly improving the air environment.

In addition, in the above embodiment, a case where the indoor unit 40 and the ventilation fan 50 are provided separately has been described, but the present disclosure can be applied in the same manner as described above even if the indoor unit 40 has a ventilation function.

In addition, in the above embodiment, a case where the CO2 concentration sensor 10 is provided separately has been described, but the present disclosure can be applied in the same manner as above even if the indoor unit 40 has a sensor function for detecting the CO2 concentration.

In the above embodiment, the CPU of the control device 20, 60, 80, 90 uses the RAM as a work memory and appropriately executes the control program stored in the ROM to perform the above-mentioned operations.

However, all or part of the control unit may be realized by dedicated hardware. Examples of dedicated hardware include a single circuit, a composite circuit, a programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination of these.

The above control program can also be distributed by storing it on a computer-readable recording medium such as a CD-ROM (Compact Disc Read Only Memory), a DVD (Digital Versatile Disc), a Magneto-Optical Disc, a USB (Universal Serial Bus) memory, a memory card, or a HDD.

In the case of adopting a configuration in which such a control program is executed by a device separate from the control devices 20, 60, 80, and 90, it is possible to install the program distributed as described above into a specific or general-purpose computer, thereby causing the computer to function as the control device 20, 60, 80, and 90. In addition, the control program may be stored in a disk device owned by another server on the Internet, and the control program may be downloaded from that server to the control device.

Various embodiments and modifications of the present disclosure are possible without departing from the broad spirit and scope of the present disclosure. The above-described embodiments are for explaining the present disclosure and do not limit the scope of the present disclosure. In other words, the scope of the present disclosure is indicated by the claims, not the embodiments. Various modifications made within the scope of the claims and the scope equivalent thereto are considered to be within the scope of the present disclosure.
The subject matter of the dependent claims of the control device in the claims can also be subordinated to the air conditioning and ventilation system.

1, 2, 3, 4, 5 Air conditioning and ventilation system, 10 CO2 concentration sensor, 11 Acquisition unit, 12 Transmission unit, 20, 60, 80, 90 Control device, 21 Data reception unit, 22 Air conditioning and ventilation connection management unit, 23 Transmission unit, 61 Data acquisition unit, 62, 81 Data storage unit, 63 Learning unit, 64 Model storage unit, 82 Estimation unit, 91 Mode setting unit, 30 Outdoor unit, 31 Reception unit, 32 Outdoor air temperature acquisition unit, 33 Transmission unit, 40 Indoor unit, 41 Reception unit, 42 Control unit, 43 Room temperature acquisition unit, 44 Transmission unit, 50 Ventilation fan, 51 Reception unit, 52 Control unit, 70 Server, 71 Weather information storage unit, 100 Router, 110 Cloud server

Claims (9)

A control device that controls an air conditioner and a ventilation fan,
An acquisition means for acquiring an indoor CO2 concentration, an outside temperature, and a room temperature;
an air conditioning control means for setting an air conditioning temperature to be set in the air conditioner to an air conditioning temperature having a higher air conditioning capacity than the current air conditioning temperature in accordance with a relationship between the outside air temperature and the room temperature when the CO2 concentration acquired by the acquisition means exceeds a threshold value;
a ventilation control means for operating the ventilation fan when the room temperature acquired by the acquisition means becomes equal to the air conditioning temperature set by the air conditioning control means;
A control device comprising: The ventilation control means operates the ventilation fan at high power,
When the ventilation control means operates the ventilation fan at a high speed, the air conditioning control means increases the air volume of the air conditioner and swings the air direction of the air conditioner.
The control device according to claim 1 . The air conditioning control means sets the air conditioning temperature to be set in the air conditioner to an air conditioning temperature lower than a current air conditioning temperature when the air conditioner is in a cooling operation, and sets the air conditioning temperature to be set in the air conditioner to an air conditioning temperature higher than the current air conditioning temperature when the air conditioner is in a heating operation.
The control device according to claim 1 or 2. Further comprising a learning means for learning a degree of change in room temperature when the ventilation fan is operated,
The air conditioning control means, when the air conditioner is in cooling operation, sets the air conditioning temperature to be set in the air conditioner to an air conditioning temperature that is lower than the current air conditioning temperature in accordance with the degree of change learned by the learning means, and, when the air conditioner is in heating operation, sets the air conditioning temperature to be set in the air conditioner to an air conditioning temperature that is higher than the current air conditioning temperature in accordance with the degree of change learned by the learning means.
The control device according to claim 1 or 2. The method further includes estimating a time when the CO2 concentration will exceed the threshold value based on a time series change of the CO2 concentration acquired by the acquisition means,
The air conditioning control means sets the air conditioning temperature to be set on the air conditioner to an air conditioning temperature lower than the current air conditioning temperature when the air conditioner is in cooling operation, even if the CO2 concentration acquired by the acquisition means has not yet exceeded a threshold value, as long as the time estimated by the estimation means is within a certain period of time, and sets the air conditioning temperature to be set on the air conditioner to an air conditioning temperature higher than the current air conditioning temperature when the air conditioner is in heating operation.
The control device according to claim 1 or 2. Further comprising a mode setting means for setting the control of the air conditioner and the ventilation fan to either a first mode prioritizing comfort or a second mode prioritizing ventilation;
When the mode setting means is set to the first mode, if the CO2 concentration acquired by the acquisition means exceeds a threshold value, the air conditioning control means sets an air conditioning temperature to be set in the air conditioner to an air conditioning temperature having an air conditioning capacity higher than a current air conditioning temperature in accordance with a relationship between the outside air temperature and the room temperature,
When the mode setting means is set to the first mode, the ventilation control means operates the ventilation fan when the room temperature acquired by the acquisition means becomes equal to the air conditioning temperature set by the air conditioning control means, and when the mode setting means is set to the second mode, the ventilation control means operates the ventilation fan when the CO2 concentration acquired by the acquisition means exceeds a threshold value.
The control device according to claim 1 or 2. An air conditioning and ventilation system in which a control device controls an air conditioner and a ventilation fan,
An acquisition means for acquiring an indoor CO2 concentration, an outside temperature, and a room temperature;
an air conditioning control means for setting an air conditioning temperature to be set in the air conditioner to an air conditioning temperature having a higher air conditioning capacity than the current air conditioning temperature in accordance with a relationship between the outside air temperature and the room temperature when the CO2 concentration acquired by the acquisition means exceeds a threshold value;
a ventilation control means for operating the ventilation fan when the room temperature acquired by the acquisition means becomes equal to the air conditioning temperature set by the air conditioning control means;
An air conditioning and ventilation system. A control method executed by a control device that controls an air conditioner and a ventilation fan,
An acquisition step of acquiring an indoor CO2 concentration, an outside temperature, and a room temperature;
an air conditioning control step of setting an air conditioning temperature to be set in the air conditioner to an air conditioning temperature having an air conditioning capacity higher than a current air conditioning temperature in accordance with a relationship between the outside air temperature and the room temperature when the CO2 concentration acquired in the acquisition step exceeds a threshold value;
a ventilation control step of operating the ventilation fan when the room temperature acquired in the acquisition step becomes equal to the air conditioning temperature set in the air conditioning control step;
A control method comprising: The computer that controls the air conditioner and the ventilation fan
An acquisition step of acquiring the indoor CO2 concentration, the outside temperature, and the room temperature;
an air conditioning control step of setting an air conditioning temperature to be set in the air conditioner at an air conditioning temperature having an air conditioning capacity higher than a current air conditioning temperature in accordance with a relationship between the outside air temperature and the room temperature when the CO2 concentration acquired in the acquisition step exceeds a threshold value;
a ventilation control step of operating the ventilation fan when the room temperature acquired in the acquisition step becomes equal to the air conditioning temperature set in the air conditioning control step;
A program for executing.

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