CN115461580A - Air conditioning system, building, and program - Google Patents

Abstract

An air conditioning system (1) is provided with: an air conditioning device (10) that has a supply/discharge function and an indoor temperature adjustment function and that performs air conditioning of an indoor space (80); CO 2 ₂ A sensor (20) which is provided at a position (P0) in the indoor space (80) and measures a first concentration of carbon dioxide at the position (P0); a signal processing unit (32) based on CO ₂ The first concentration measured by the sensor (20) is used to estimate a second concentration of carbon dioxide at each of the one or more positions (P1 and P2)A height of the positions (P1 and P2) from the floor or ceiling face of the indoor space (80) is different from a height of the position (P0) from the floor or ceiling face; and a control unit (33) that controls the air conditioning equipment (10) on the basis of the first concentration and the second concentration.

Description

Air conditioning system, building, and program

Technical Field

The invention relates to an air conditioning system, a building, and a program.

Background

For example, patent document 1 discloses an air-conditioning system including an air conditioner and a ventilator. In the air-conditioning system disclosed in patent document 1, the concentration of carbon dioxide (hereinafter, referred to as CO) detected by a carbon dioxide sensor provided in an air conditioner or a ventilator ₂ Concentration) is greater than the set concentration, the ventilator is controlled so that the ventilation amount is increased.

Documents of the prior art

Patent document

Patent document 1: international publication No. 2014/109193

Disclosure of Invention

Problems to be solved by the invention

CO in indoor space ₂ The concentration may be locally high or low depending on the concentration of the person. Therefore, in the conventional air-conditioning system, the following may occur: despite the fact that CO ₂ The concentration is low as the indoor space as a whole and ventilation is not required, but because of CO ₂ Since the concentration is locally high at the position where the carbon dioxide sensor is provided, the ventilator operates, and thus, originally unnecessary electric power is consumed.

Conversely, the following may occur: despite CO ₂ The concentration is high in the indoor space as a whole and ventilation is required, but the concentration is high due to CO ₂ Since the concentration is locally low at the position where the carbon dioxide sensor is provided, the ventilator does not operate. In this case, CO cannot be reduced ₂ Concentration, and thus comfort of the indoor space cannot be maintained.

Therefore, an object of the present invention is to provide an air conditioning system, a building, and a program that can maintain comfort of an indoor space while suppressing power consumption of an air conditioner.

Means for solving the problems

An air conditioning system according to an aspect of the present invention includes: an air conditioning apparatus having a supply/discharge function and an indoor temperature adjustment function, for performing air conditioning of an indoor space; CO 2 ₂ A sensor disposed at a first location within the indoor space that measures a first concentration of carbon dioxide at the first location; a signal processing part based on the CO ₂ Estimating a second concentration of carbon dioxide at each of one or more second locations by the first concentration measured by the sensor, wherein the second location is at a different height from a floor or ceiling surface of the indoor space than the first location; and a control unit that controls the air conditioning equipment based on the first concentration and the second concentration.

A building according to an aspect of the present invention includes the air conditioning system.

A program according to an aspect of the present invention causes a computer to execute a control method of controlling an air conditioner that has a supply/discharge function and an indoor temperature adjustment function and performs air conditioning of an indoor space, the control method including controlling an air conditioner that performs air conditioning of the indoor space from CO installed at a first position in the indoor space ₂ A sensor acquires a first concentration of carbon dioxide at the first location, estimates a second concentration of carbon dioxide at each of one or more second locations based on the first concentration, wherein the second location is at a different height from a floor or ceiling surface of the indoor space than the first location, and controls the air conditioning equipment based on the first concentration and the second concentration.

Further, an embodiment of the present invention can also be realized as the control method described above. Alternatively, an embodiment of the present invention can be realized as a non-transitory computer-readable recording medium on which the program is recorded.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the comfort of the indoor space can be maintained while suppressing the power consumption of the air conditioner.

Drawings

Fig. 1 is a diagram showing the configuration of an air conditioning system according to embodiment 1.

Fig. 2 is a flowchart illustrating an operation of the air conditioning system according to embodiment 1.

Fig. 3 is a diagram showing the configuration of an air conditioning system according to embodiment 2.

FIG. 4A is a schematic diagram showing a person and multiple COs located in an indoor space ₂ Perspective view of the respective positions of the sensors.

FIG. 4B is a view showing CO at the ceiling surface (sensor installation surface) of the indoor space shown in FIG. 4A ₂ Contour plot of concentration distribution.

Fig. 5 is a flowchart illustrating an operation of the air conditioning system according to embodiment 2.

FIG. 6A is a schematic diagram showing multiple COs ₂ A perspective view of a first example of the arrangement of the sensors.

FIG. 6B is a schematic diagram showing multiple COs ₂ Perspective view of a second example of the arrangement of sensors.

FIG. 6C is a schematic diagram showing multiple COs ₂ A perspective view of a third example of the arrangement of the sensors.

FIG. 7A is a view showing the shape of an indoor space and a plurality of COs ₂ A top view of a first example of a configuration of the sensor.

FIG. 7B is a view showing the shape of an indoor space and a plurality of COs ₂ A top view of a second example of the configuration of the sensor.

FIG. 7C is a view showing the shape of an indoor space and a plurality of COs ₂ A top view of a third example of the configuration of the sensor.

FIG. 7D is a view showing the shape of an indoor space and a plurality of COs ₂ Top view of a fourth example of the configuration of the sensor.

FIG. 7E is a view showing the shape of the indoor space and a plurality of COs ₂ A top view of a fifth example of the configuration of the sensor.

FIG. 7F is a view showing an indoor spaceForm and multiple CO ₂ A top view of a sixth example of the configuration of the sensor.

Fig. 8 is a diagram showing the configuration of an air conditioning system according to embodiment 3.

FIG. 9 is a schematic view showing CO ₂ Graph of the time variation of the concentration.

Fig. 10 is a flowchart illustrating an operation of the air conditioning system according to embodiment 3.

Fig. 11 is a diagram showing the configuration of an air conditioning system according to embodiment 4.

Fig. 12 is a diagram showing the configuration of an information presentation unit according to embodiment 4.

Detailed Description

Hereinafter, an air conditioning system, a building, and a program according to an embodiment of the present invention will be described in detail with reference to the drawings. The embodiments described below all show a specific example of the present invention. Accordingly, the numerical values, shapes, materials, constituent elements, arrangement positions and connection modes of the constituent elements, steps, order of the steps, and the like shown in the following embodiments are examples, and the gist thereof is not limited to the invention. Therefore, among the components in the following embodiments, components not described in the independent claims will be described as arbitrary components.

The drawings are schematic and not necessarily strictly illustrated. Therefore, for example, the scales and the like are not necessarily consistent in each drawing. In the drawings, substantially the same components are denoted by the same reference numerals, and redundant description is omitted or simplified.

In the present specification, terms indicating the relationship between elements such as parallel or perpendicular, terms indicating the shape of elements such as rectangular, square, or circular, and numerical ranges are not intended to be expressions which only have strict meanings, but are intended to include substantially equivalent ranges, for example, expressions which differ by about several percent.

In the present specification and the drawings, the x-axis, the y-axis, and the z-axis represent three axes of a three-dimensional orthogonal coordinate system. In each embodiment, the z-axis direction is a vertical direction, and a direction perpendicular to the z-axis (a direction parallel to the xy plane) is a horizontal direction. The positive direction of the z-axis is set to be vertically upward.

(embodiment mode 1)

[ Structure ]

First, the configuration of the air conditioning system according to embodiment 1 will be described with reference to fig. 1. Fig. 1 is a diagram showing a configuration of an air conditioning system 1 according to the present embodiment.

The air conditioning system 1 shown in fig. 1 is a system for adjusting the air environment of an indoor space 80 in a building such as a house, an office, or a hospital. The indoor space 80 is a rectangular parallelepiped-shaped closed space having a ceiling surface 81 and a floor surface 82. The indoor space 80 is a large space having a size of 15m × 15m on the floor 82 and a height of about 2.5m to 3.0m from the floor 82 to the ceiling 81.

The air environment of the indoor space 80 refers to the temperature, humidity, and CO in the indoor space 80 ₂ Concentration, etc. The air conditioning system 1 adjusts at least one of the temperature and the humidity of the indoor space 80, and adjusts CO of the indoor space 80 ₂ And (4) concentration.

As shown in FIG. 1, an air conditioning system 1 includes an air conditioner 10 and a CO ₂ Sensor 20, control device 30, and cloud server 40. The control device 30 and the cloud server 40 are connected to be able to communicate with each other via a wide area communication network 50 such as the internet.

The air conditioner 10 has a supply/discharge function and an indoor temperature adjustment function, and performs air conditioning of the indoor space 80. Specifically, the air conditioner 10 includes an air supply facility 11 and an air discharge facility 12. The air supply device 11 is a device for supplying air from the outdoor space to the indoor space 80. The exhaust equipment 12 is a device for exhausting air from the indoor space 80 to the outdoor space. The air feeding device 11 and the air discharging device 12 are, for example, blowers (fans), respectively. The air supply device 11 and the air discharge device 12 may be a single device having an air supply and discharge function.

The air conditioner 10 further includes an indoor temperature adjusting device (not shown) for adjusting the temperature of the indoor space 80. The indoor temperature adjusting device is, for example, a cooling/heating device that adjusts the temperature of the indoor space 80. The indoor temperature adjusting apparatus may also adjust the humidity of the indoor space 80. The indoor temperature adjusting device may be a cooling device having only a cooling function, or may be a heating device having only a heating function. Alternatively, the air conditioner 10 may be a single device (e.g., a total heat exchanger) having the functions of the air supply device 11, the air discharge device 12, and the cooling and heating device.

CO ₂ The sensor 20 is installed at a position P0 in the indoor space 80, and measures CO at the position P0 ₂ And (4) concentration. From CO ₂ CO measured by sensor 20 ₂ The concentration is an example of the first concentration, and is CO ₂ The measured value of the concentration. CO 2 ₂ The sensor 20 is, for example, CO of infrared absorption system ₂ The sensor is not particularly limited. CO 2 ₂ Sensor 20 will indicate the measured CO ₂ The information of the density is output to control device 30.

CO ₂ The position P0, which is the installation position of the sensor 20, is an example of the first position in the indoor space 80, and is located on the ceiling surface 81, for example. As shown in fig. 1, the position P0 is a position closer to one of the four corners than the center of the ceiling surface 81. For example, the position P0 is a position where the person 90 rarely exists vertically below the position P. That is, the position P0 is not vertically above a chair on which the person 90 sits, a work area of the person 90, a vicinity of a door where the person 90 enters and exits the indoor space 80, or the like.

In addition, CO ₂ The position P0 at which the sensor 20 is installed may be the ground 82. Alternatively, the position P0 may be a position spaced apart from the ceiling surface 81 or the floor surface 82 by a predetermined distance in the vertical direction.

Control device 30 is based on CO ₂ CO measured by sensor 20 ₂ The concentration to control the air conditioning apparatus 10. The control device 30 is a local controller provided in or near the indoor space 80. The control device 30 includes a first communication unit 31, a signal processing unit 32, a control unit 33, a storage unit 34, and a second communication unit 35.

The first communication unit 31 is used by the control device 30 to communicate with the air-conditioning equipment 10 and the CO via the local communication network ₂ A communication module (communication circuit) for the sensor 20 to communicate. The first communication unit 31 is, for exampleThe operation information of the air conditioner 10 is acquired. Specifically, the operation information is information indicating the operation state of the air conditioner 10, such as a set temperature, a set humidity, or a set amount of air to be discharged. In addition, the first communication unit 31 is connected from the CO ₂ Sensor 20 acquires CO at position P0 ₂ And (4) concentration. The communication performed by the first communication unit 31 may be wired communication or wireless communication. The communication standard used for communication is not particularly limited.

The signal processing unit 32 is based on the CO ₂ CO measured by sensor 20 ₂ Concentration to estimate CO at each of one or more positions different from the position P0 ₂ And (4) concentration. One or more COs estimated by the signal processing unit 32 ₂ The concentration is an example of the second concentration, and is CO ₂ An estimate of the concentration. In the present embodiment, the signal processing unit 32 estimates CO ₂ Sensor 20 for measuring CO ₂ CO at a position different from the measurement position P0 at the same time as the concentration ₂ And (4) concentration.

For example, the signal processing section 32 estimates CO at each of the positions P1 and P2 shown in fig. 1 ₂ And (4) concentration. Both the positions P1 and P2 are examples of second positions having different heights from the floor surface 82 or the ceiling surface 81 than the position P0 from the floor surface 82 or the ceiling surface 81. The position P1 is a position at a height of 1.2m from the ground 82. The height of the position P1 corresponds to the same height as the vicinity of the mouth of the person 90 seated in the chair. Position P2 is a position on the ground 82. The positions P1 and P2 are positions different from each other on the vertical line VL passing through the position P0.

In the present embodiment, the signal processing unit 32 uses the following cases: CO at each of positions P1 and P2 ₂ Concentration can be used for CO at position P0 ₂ Concentration is a linear function representation of the variable. Specifically, the signal processing unit 32 estimates CO based on the following expression (1) ₂ And (4) concentration.

(1)B＝α×A+β

In formula (1), A is formed from CO ₂ CO measured by sensor 20 ₂ Concentration, i.e. CO at position P0 ₂ The measured value of the concentration. B is CO in position P1 or P2 ₂ An estimate of the concentration. A and β are coefficients, respectively. Specifically, α and β are values that may differ depending on the position at which the estimation is made.

For example, α is a smaller value when used for estimation of the position close to the floor surface 82 than when used for estimation of the position close to the ceiling surface 81. This is deduced by considering the movement path of carbon dioxide contained in the exhalation of the person 90. Specifically, as shown in fig. 1, carbon dioxide contained in the exhaled breath of the person 90 moves toward the ceiling surface 81 by an updraft 91 generated by the body temperature of the person 90. The carbon dioxide reaches the ceiling surface 81 vertically above the person 90, then diffuses along the ceiling surface 81, and since the carbon dioxide is heavier than air, the carbon dioxide gradually falls and diffuses in the indoor space 80. On the other hand, in a state where a person is present indoors, since carbon dioxide frequently rises around the person, CO is present closer to the ceiling surface 81 ₂ The higher the concentration, the closer to the ground 82, the CO ₂ The lower the concentration.

Further, at a height (position P1) near the mouth edge of the person 90, there may occur a case where carbon dioxide exhaled by the person 90 exists as in the case where the person 90 exists nearby. Thus, CO at position P1 ₂ CO concentration sometimes becomes higher than that of the ceiling face 81 ₂ The concentration is high. From the above, for example, CO at position P1 is calculated ₂ α at the concentration B is a value of 0.9 to 1.5. In addition, CO at position P2 is calculated ₂ α at the concentration B is a value of 0.6 to 0.9. Alpha and beta may also be varied based on the distance of the positions P1 and P2 from the person 90.

Further, the signal processing section 32 estimates CO ₂ The concentration position may be only 1 position. For example, the signal processing unit 32 may estimate only CO at the position P2 ₂ And (4) concentration. Alternatively, the signal processor 32 may estimate CO continuously along the vertical line VL ₂ And (4) concentration. That is, CO at each of a plurality of positions arranged at sufficiently small equal intervals (for example, 10cm or less) on the vertical line VL can also be estimated ₂ And (4) concentration. Thereby, CO on the plumb line VL can be generated ₂ Distribution of concentration (i.e. vertical)Distribution).

The signal processing section 32 is a processor, a microcomputer, or a dedicated circuit. The signal processing unit 32 may be realized by a combination of two or more of a processor, a microcomputer, and a dedicated circuit. The functions performed by the signal processing unit 32 may be implemented by software or hardware.

The control part 33 is based on the CO ₂ CO measured by sensor 20 ₂ Concentration A and a plurality of COs estimated by the signal processing section 32 ₂ The concentration B to control the air conditioning apparatus 10. In particular, in CO ₂ Concentration A and multiple CO ₂ When at least one of the concentrations B exceeds the predetermined threshold Dth, the control unit 33 controls the air conditioner 10 so that the air supply and exhaust function takes precedence over the indoor temperature adjustment function.

The threshold Dth is CO in the indoor space 80 ₂ Reference value, i.e. CO, at which the concentration should not exceed ₂ Allowable concentration of concentration. The threshold Dth is a value of more than 400ppm and 2000ppm or less. The threshold Dth may be 700ppm to 1000ppm. For example, the threshold Dth is 1000ppm.

The control unit 33 determines the control condition of the air conditioner 10 based on the capability information indicating the capability of the air conditioner 10, outputs a control command to the air conditioner 10 via the first communication unit 31, and causes the air conditioner 10 to operate under the determined control condition. Further, the capability information is acquired from the air conditioner 10 via the first communication unit 31, for example. Alternatively, the capability information may be acquired from the cloud server 40 via the second communication unit 35.

The control unit 33 is a processor, a microcomputer, or a dedicated circuit. The control unit 33 may be realized by a combination of two or more of a processor, a microcomputer, and a dedicated circuit. The functions performed by the control unit 33 may be implemented by software or hardware. The control unit 33 and the signal processing unit 32 may be realized by sharing the same hardware.

The storage unit 34 stores and processes CO ₂ A program for estimating the concentration, a program for controlling the air conditioner 10, and the like. The storage part 34 is, for example, a halfA nonvolatile memory element such as a conductor memory.

The second communication unit 35 is a communication module (communication circuit) for the control device 30 to communicate with the cloud server 40 via the wide area communication network 50. The communication performed by the second communication unit 35 may be wireless communication or wired communication.

The cloud server 40 is a storage CO ₂ Measurement of CO by sensor 20 ₂ A computer system for time series data of concentrations. Show a reaction of CO ₂ CO measured by sensor 20 ₂ The information of the density is acquired by the first communication unit 31 of the control device 30 and then transmitted to the cloud server 40 via the second communication unit 35. In the cloud server 40, CO ₂ The concentration is stored as time-series data together with the time of day. In addition, CO ₂ The time-series data of the concentration may be stored in the storage unit 34 of the control device 30. In this case, the control device 30 may not include the second communication unit 35, and the air conditioning system 1 may not include the cloud server 40.

[ actions ]

Next, the operation of the air conditioning system 1 according to the present embodiment will be described with reference to fig. 2. Fig. 2 is a flowchart illustrating the operation of the air conditioning system 1 according to the present embodiment. Fig. 2 mainly shows the operation of the control device 30.

As shown in fig. 2, first, the control unit 33 acquires the capability information of the air supply and exhaust function of the air conditioner 10 (S10). At this time, the control unit 33 may acquire the operation information of the air conditioner 10. The control unit 33 can appropriately determine the control conditions of the air conditioner 10 by comparing the operation information of the air conditioner 10 with the capability information.

Then, the signal processing unit 32 receives the signal from the CO via the first communication unit 31 ₂ Sensor 20 acquiring CO ₂ The measured value of concentration (S11). CO 2 ₂ The sensor 20 measures CO at the position P0 based on an instruction from the control unit 33, for example ₂ Concentration of CO and will represent the measured CO ₂ The information of the density is output to control device 30. Or, CO ₂ The sensor 20 may also be continuously or periodically CO enabled ₂ Determination of concentration, and continuously or periodicallyGround output of measured CO ₂ And (4) concentration.

Then, the signal processing section 32 calculates CO ₂ The vertical distribution of concentration D (z) (S12). The vertical distribution D (z) shows the estimated CO at a plurality of positions on the plumb line VL shown in FIG. 1 ₂ And (4) concentration. The signal processing unit 32 estimates CO at each position based on the above expression (1) by using α and β determined appropriately for each estimated position ₂ And (4) concentration. The estimated vertical distribution D (z) is temporarily stored in the storage unit 34, for example.

Next, the signal processing unit 32 extracts CO from the vertical distribution D (z) ₂ The maximum concentration Dmax at which the concentration is the maximum (S13). The signal processing unit 32 compares the extracted maximum density Dmax with a predetermined threshold Dth (S14).

When the maximum density Dmax is equal to or less than the threshold Dth (yes in S14), the control unit 33 maintains the current control conditions of the air conditioner 10 (S15). That is, due to the CO at which position on the plumb line VL ₂ The concentration does not exceed the threshold value Dth, and therefore CO in the indoor space 80 ₂ The concentration is within the allowable range, and the control conditions may not be changed.

When the maximum density Dmax exceeds the threshold Dth (no in S14), the control unit 33 determines a control condition for setting the maximum density Dmax to the threshold Dth or less based on the capability information (S16). For example, the control unit 33 calculates the amount of supply/discharge gas required to make the maximum concentration Dmax equal to or less than the threshold Dth, and determines control conditions for realizing the calculated amount of supply/discharge gas. Since the capability information is used to determine the control condition, the capability information may be acquired (S10) after determining that the maximum density Dmax exceeds the threshold Dth.

Next, the control unit 33 controls the air conditioner 10 so that the air supply and exhaust function takes precedence over the indoor temperature adjustment function (S17). Specifically, the control unit 33 operates the gas supply facility 11 and the exhaust facility 12 based on the control conditions determined in step S16.

After that, control device 30 repeats the processing from step S11. Thereby, CO in the indoor space 80 can be generated ₂ When the concentration exceeds the threshold DthMake CO ₂ The concentration is rapidly decreased to maintain the comfort of the indoor space 80.

Further, in step S12, the signal processing section 32 may estimate CO at only one of the positions P1 and P2 ₂ And (4) concentration. In this case, step S13 is omitted.

[ Effect and the like ]

As described above, the air conditioning system 1 according to the present embodiment includes: an air conditioning system 10 having a supply/discharge function and an indoor temperature adjustment function and performing air conditioning of an indoor space; CO 2 ₂ A sensor 20 provided at a first position in the indoor space 80, for measuring a first concentration of carbon dioxide at the first position; a signal processing part 32 based on CO ₂ Estimating a second concentration of carbon dioxide at each of one or more second positions having a different height from the floor 82 or ceiling 81 of the indoor space 80 than the first position, from the first concentration measured by the sensor 20; and a control unit 33 that controls the air conditioner 10 based on the first concentration and the second concentration.

Thereby, the CO at the 2 or more positions in the indoor space 80 is used ₂ Since the air conditioner 10 is controlled by the concentration, CO in the indoor space 80 can be suppressed ₂ The air conditioner 10 is operated efficiently by the influence of the local level of concentration (i.e., concentration unevenness). Thus, the comfort of the indoor space 80 can be maintained while suppressing the power consumption of the air conditioner 10.

In addition, a large amount of CO does not need to be configured ₂ Sensor, as a minimum structure, only 1 CO is provided ₂ The sensor 20 may be used. On the other hand, in the case of disposing a large amount of CO ₂ In the case of the sensor, CO in the indoor space 80 can be generated with high accuracy ₂ The effect of the spatial distribution of the concentration. However, in this case, there is a problem of handling a large amount of CO ₂ CO acquired by sensor ₂ The systematic complication and high cost of the concentration data are adverse effects. In contrast, according to the air conditioning system 1 of the present embodiment, the number of sensors can be minimizedThe air conditioner 10 is operated efficiently. Of course, when there are a plurality of air-aged areas due to the shape of the room or the complicated flow of wind generated by supply and exhaust air, etc., CO can be additionally provided on the ceiling surface corresponding to the position of the area ₂ A sensor 20.

When ventilation is performed while the temperature or humidity in the indoor space 80 is being adjusted by the air conditioner 10, the temperature or humidity of the indoor space 80 changes, and the comfort of the person 90 located in the indoor space 80 may be impaired. In order to avoid impairment of comfort, the temperature or humidity adjustment needs to be carried out rapidly. In this case, since the air conditioner 10 is caused to strongly exhibit the indoor temperature adjusting function, the power consumption of the air conditioner 10 increases.

According to the air conditioning system 1 of the present embodiment, the CO in the indoor space 80 is used as a basis ₂ Since the air conditioner 10 is controlled by the concentration, ventilation can be performed when necessary, and ventilation can be not performed when unnecessary. For example, if CO ₂ When the concentration is maintained at a low level, the number of ventilation can be reduced to less than 0.5 ventilation/hour, which is a typical number of ventilation. This can maintain the comfort of the indoor space while suppressing the power consumption of the air conditioner 10.

Further, since the control of the air supply system 11 and the exhaust system 12 can be performed swiftly, the amount of ventilation per one time can be reduced. Since the temperature or humidity of the indoor space 80 can be easily kept constant by reducing the amount of ventilation, the operation of the indoor temperature adjusting function can be stabilized. That is, since the fluctuation of the temperature or the humidity is small, the output of the indoor temperature adjusting function may be small, and the power consumption can be suppressed.

In addition, for example, from CO ₂ The first position, which is the measurement position where the sensor 20 performs measurement, is located on the ceiling surface 81 or the floor surface 82.

Thus, the CO can be disposed at a position away from the mouth of the person 90 ₂ A sensor 20. Can inhibit CO ₂ CO measured by sensor 20 ₂ The measurement value of the concentration is rapidly increased or decreased by the respiration of the person 90, and the measurement can be improvedReliability of the fixed value. Therefore, CO estimated based on the measured values ₂ The reliability of the estimated value of the concentration is also improved. Therefore, the air conditioner 10 can be efficiently operated while suppressing the influence of the density unevenness in the indoor space 80.

In addition, CO ₂ When the sensor 20 is provided on the ceiling surface 81, there is a low possibility that the sensor contacts a person 90, an object, water, or the like. Thus, CO ₂ The possibility of the sensor 20 failing is also low, and the air conditioning system 1 with high reliability can be realized.

In addition, in the air conditioning system 1, by constructing a physical model of the airflow to which the fluid dynamics is applied and performing simulation, CO in the indoor space 80 can be generated with high accuracy ₂ And (4) concentration distribution. However, not only the amount of calculation increases, but also the physical model needs to be reconstructed each time the person 90 enters or exits the indoor space 80. Therefore, it is difficult to efficiently control the air conditioning apparatus 10 in accordance with the actual situation in the indoor space 80.

In contrast, in the air conditioning system 1 according to the present embodiment, for example, when the first density is a and the second density is B, the signal processing unit 32 performs the following processing based on the equation: b = α × a + β (α and β are coefficients) to estimate the second concentration.

This makes it possible to reduce the amount of computation required to efficiently control the air-conditioning apparatus 10, because it is possible to avoid performing a complicated computation with a large processing amount.

In addition, for example, from CO ₂ The first position, which is the measurement position at which the sensor 20 measures, is located on the ceiling surface 81, and the one or more second positions are a plurality of different second positions on the vertical line VL passing through the first position.

Thereby, by increasing CO ₂ The number of estimated values of the density can further suppress the influence of density unevenness in the indoor space 80, and the air conditioner 10 can be operated more efficiently.

For example, when at least one of the first concentration and the one or more second concentrations exceeds the predetermined threshold Dth, the control unit 33 controls the air conditioner 10 so that the air supply/discharge function takes precedence over the indoor temperature adjustment function.

Thereby, CO can be added ₂ When the concentration exceeds the threshold value Dth, the air conditioner 10 is operated to control CO ₂ The concentration decreases rapidly. Thus, the comfort of the indoor space 80 can be maintained. For example, when the indoor unit is operated at 0.5 times/hour, which is a normal ventilation frequency, the CO in the indoor space 80 cannot be reduced ₂ In the case of the concentration, since the supply/exhaust function can be controlled preferentially, CO in the indoor space 80 can be controlled ₂ The concentration decreases rapidly.

For example, the program according to the present embodiment is a program for causing a computer to execute a control method for controlling the air conditioner 10, and the air conditioner 10 has a supply/discharge function and an indoor temperature adjustment function and performs air conditioning of the indoor space 80. In the control method, the CO is controlled from a first position provided in the indoor space 80 ₂ The sensor 20 acquires a first concentration of carbon dioxide at a first location, estimates a second concentration of carbon dioxide at each of one or more second locations, which are different in height from the floor 82 or ceiling 81 of the indoor space 80 from the first location, based on the first concentration, and controls 10 the air conditioning apparatus based on the first concentration and the second concentration.

As a result, as in the case of the air conditioning system 1, the comfort of the indoor space 80 can be maintained while suppressing the power consumption of the air conditioner 10.

(embodiment mode 2)

Next, embodiment 2 will be explained.

Embodiment 2 is mainly different from embodiment 1 in that a human detection sensor and a plurality of CO are provided in an indoor space ₂ A sensor. In the following, differences from embodiment 1 will be mainly described, and descriptions of common points will be omitted or simplified.

[ Structure ]

First, the configuration of the air conditioning system according to embodiment 2 will be described with reference to fig. 3. Fig. 3 is a diagram showing the configuration of the air conditioning system 101 according to the present embodiment.

As shown in fig. 3, an air conditioning system 101 includes an air conditioner 10 and a plurality of COs ₂ Sensors 20a to 20e, human detection sensor 120, control device 130, and cloud server 40.

Multiple CO ₂ Each of the sensors 20a to 20e is similar to CO according to embodiment 1 ₂ The sensor 20 is identical. Multiple CO ₂ The sensors 20a to 20e are installed at different positions. In the following, CO is carried out ₂ Respective CO in the sensors 20a to 20e ₂ When the common features of the sensors are explained, it is not necessary to distinguish between COs ₂ In the case of the sensors 20a to 20e, the CO may be detected ₂ The sensor 20 is illustrated.

CO ₂ As the number of sensors 20 increases, CO in the indoor space 80 can be generated with higher accuracy ₂ Concentration distribution, but increase in the amount of calculation cannot be avoided. Thus, CO ₂ The number of sensors 20 is preferably small. In the air conditioning system 101 according to the present embodiment, the CO is used ₂ The sensor 20 is configured to utilize a limited amount of CO ₂ The sensor 20 suppresses the influence of concentration unevenness in the indoor space 80.

Specifically, a plurality of COs ₂ The sensor 20 is located in a first virtual plane parallel to the ceiling face 81 or the floor 82. Multiple CO ₂ 4 COs in sensor 20 ₂ The sensors are arranged at four corners of the first virtual plane. In the present embodiment, the first virtual plane is the ceiling surface 81. That is, multiple COs ₂ The sensor 20 is provided on the ceiling surface 81.

E.g. 4 COs ₂ The sensors 20a to 20d are provided at the four corners of the ceiling surface 81. The remaining 1 CO ₂ The sensor 20e is provided in the center of the ceiling surface 81.CO 2 ₂ The sensor 20e is provided at the same position as the human detection sensor 120.

Here, the "same position" may or may not be completely the same as long as it can be regarded as substantially the same range. CO 2 ₂ The sensor 20e and the human detection sensor 120 may be disposed at a maximum distance of about several cm to several tens of cm, for example. Similarly, the "corner" refers not only to the top view of the ceiling 81The vertices of the rectangular shapes may be aligned in a range that can be substantially regarded as the same as the vertices. For example, the "corner" may be a position about several cm to several tens cm from the vertex of the rectangle.

The human detection sensor 120 detects a human 90 present in the indoor space 80. The human detection sensor 120 is, for example, an infrared sensor, an image sensor, or the like. The human detection sensor 120 is disposed vertically above an area where the human 90 is likely to be present, such as a chair or a work area.

The human detection sensor 120 outputs the detection result of the human 90 to the control device 130. The detection result contains information indicating whether or not the person 90 is present. The detection result may further include information indicating at least one of the position and the number of persons of the detected person 90.

The control device 130 is based on multiple COs ₂ Respective CO in the sensor 20 ₂ CO measured by sensor 20 ₂ Concentration to control the air conditioning apparatus 10. In the present embodiment, the control device 130 also controls the air conditioner 10 based on the detection result obtained by the human detection sensor 120. The control device 130 includes a signal processing unit 132 instead of the signal processing unit 32, compared to the control device 30 according to embodiment 1.

The signal processing unit 132 is based on a plurality of COs ₂ CO measured by sensor 20 ₂ Concentration to estimate the set of CO ₂ A first concentration profile of carbon dioxide within a first virtual plane of the sensor 20. Due to 5 CO ₂ Since the sensors 20a to 20e are provided on the ceiling surface 81, the first concentration distribution is CO in the ceiling surface 81 ₂ And (4) concentration distribution. The first concentration profile contains CO at each position determined by x and y coordinates ₂ Concentration A (x, y).

For example, the signal processing section 132 is based on a plurality of COs ₂ CO at the respective installation positions of the sensors 20 ₂ Concentration, using statistical methods to generate CO ₂ And (4) concentration distribution. Specifically, as a statistical method, an algorithm for calculating the contour is used. The algorithms are, for example, the maximum slope method, the Enhanced Triangulated TIN (Enhanced Triangulated Irregular Network) method, the,Kriging (Kriging) method or spline method, etc. In the present specification, the statistical method does not mean performing a process using a physical simulation system such as a simulation of fluid dynamics.

For example, as shown in FIG. 4A, based on 6 COs disposed on the ceiling surface 81 ₂ CO of each of the sensors 20a to 20f ₂ Measured values of the concentrations enable CO to be generated as shown in FIG. 4B ₂ And (4) concentration distribution. Further, fig. 4A is a diagram showing persons 90 and 92 and a plurality of COs positioned in the indoor space 80 ₂ Perspective view of the respective positions of the sensors 20. FIG. 4B is a view showing CO at a ceiling surface 81 (sensor installation surface) of the indoor space 80 shown in FIG. 4A ₂ Contour plot of concentration distribution. The x-axis and y-axis in fig. 4B are each in meters.

In the example shown in FIG. 4A, 4 COs ₂ The sensors 20a to 20d are provided at four corners of the ceiling surface 81. 2 CO ₂ The sensors 20e and 20f are disposed directly above the persons 90h and 92, respectively. Thereby, CO caused by carbon dioxide exhaled from the persons 90 and 92 can be detected with high accuracy ₂ The change of concentration can increase CO ₂ The estimation accuracy of the concentration distribution.

The signal processing unit 132 estimates a second concentration distribution of carbon dioxide in one or more second virtual planes parallel to the first virtual plane, based on the estimated first concentration distribution. Specifically, the signal processing unit 132 converts CO at the position (x, y) included in the first concentration distribution ₂ Concentration is set as CO ₂ Concentration a, and CO contained in the second concentration distribution is calculated based on formula (1) shown in embodiment 1 ₂ And (4) concentration B. Calculated CO ₂ The concentration B is a value at a position on a perpendicular line passing through the position (x, y), and is a second position included in the second virtual plane. The signal processing unit 132 calculates CO for each coordinate (x, y) ₂ And B, generating a second concentration distribution. The signal processing unit 132 can generate three-dimensional CO in the entire indoor space 80 by continuously estimating the second concentration distribution in the height direction (z-axis direction) of the indoor space 80 ₂ And (4) concentration distribution. Three-dimensional CO ₂ The concentration distribution (also referred to as "vertical distribution" in the present embodiment) is represented by coordinatesEach position represented by (x, y, z) contains a CO ₂ Concentration B (x, y, z).

In the present embodiment, the signal processing section 132 further estimates the first concentration distribution and the second concentration distribution based on the position of the person 90 detected by the person detection sensor 120. Due to CO ₂ Since the density is increased vertically above the person 90, the accuracy of the first density distribution and the second density distribution can be improved by using the position of the person 90 for estimation. Specifically, by introducing CO around the person 90 ₂ The concentration distribution is approximated to a three-dimensional shape including the human 90 inside, for example, a cylindrical shape, a rotating ellipsoid shape, an upwardly open trumpet shape, or the like, and is superimposed on the CO determined in the above ₂ The spatial distribution of the concentration can be highly accurate. At this time, CO due to exhalation of the person 90 ₂ Since the concentration is 4.5%, the CO inside the three-dimensional shape can be generated by considering the respiration rate and the diffusion rate of carbon dioxide ₂ Estimation of the concentration distribution. In addition, the CO near the sensor 120 is detected by the user ₂ By correcting the estimation based on the value of the concentration, high accuracy can be achieved.

[ actions ]

Next, the operation of the air conditioning system 101 according to the present embodiment will be described with reference to fig. 5. Fig. 5 is a flowchart illustrating the operation of the air conditioning system 101 according to the present embodiment. Fig. 5 mainly shows the operation of the control device 130.

As shown in fig. 5, first, the control unit 33 acquires the capability information of the air supply and exhaust function of the air conditioner 10 (S10). Next, the signal processing section 132 acquires position information indicating the positions of the persons 90 and 92 detected by the person detection sensor 120 via the first communication section 31 (S20). The acquisition of the position information (S20) may be performed prior to the acquisition of the capability information (S10), or may be performed in the subsequent CO ₂ The measurement of concentration is obtained (S21).

Next, the signal processing unit 132 receives signals from the plurality of COs through the first communication unit 31 ₂ Respective CO in the sensor 20 ₂ Sensor acquisition of CO ₂ The measured value of concentration (S21). Multiple CO ₂ The sensor 20 is based on an instruction from the control unit 33, for exampleTo measure CO at each installation position ₂ Concentration of CO and will represent the measured CO ₂ The information of the density is output to the control device 130. Or, a plurality of CO ₂ The sensor 20 may also be continuously or periodically CO-enabled, respectively ₂ Measuring the concentration and outputting the measured CO continuously or periodically ₂ And (4) concentration.

Then, the signal processing section 132 calculates CO ₂ The horizontal distribution of concentration D (x, y) (S22). Specifically, the signal processing unit 132 statistically generates CO in the ceiling surface 81 based on the plurality of measurement values ₂ And (4) concentration distribution. For example, the concentration profile shown in fig. 4B is generated.

Next, the signal processing unit 132 calculates CO by expanding the horizontal distribution D (x, y) in the z-axis direction ₂ The vertical distribution of concentration D (x, y, z) (S23). The vertical distribution D (x, y, z) is CO in the indoor space 80 ₂ Three-dimensional distribution of concentration. The signal processing unit 132 estimates CO at each height from the ground 82 using appropriate α and β for each height and based on the above equation (1) ₂ And (4) concentration distribution. The estimated vertical distribution D (x, y, z) is temporarily stored in the storage section 34, for example.

The subsequent processing is the same as in embodiment 1. After controlling the air conditioner 10 so that the air supply and exhaust function has priority over the indoor temperature adjustment function, the control device 130 repeats the processing from step S20. Thereby, CO in the indoor space 80 can be generated ₂ CO is allowed to flow when the concentration exceeds a threshold Dth ₂ The concentration is rapidly decreased to maintain the comfort of the indoor space 80.

In step S23, the signal processing unit 132 may estimate only CO at a predetermined height from the ground 82 ₂ And (4) concentration distribution. For example, the signal processing unit 132 may estimate only CO at the ground 82 ₂ And (4) concentration distribution.

[ Effect and the like ]

As described above, the air conditioning system 101 according to the present embodiment includes a plurality of COs ₂ A sensor 20. Multiple CO ₂ Sensor 20 is located in a first virtual plane parallel to ceiling 81 or floor 82. Signal processing unit 132 based on a plurality of COs ₂ Respective CO in the sensor 20 ₂ The first concentration distribution of carbon dioxide in the first virtual plane is estimated based on the first concentration measured by the sensor, and the second concentration distribution of carbon dioxide in one or more second virtual planes that are parallel to the first virtual plane and that each include one or more second positions is estimated based on the estimated first concentration distribution.

Thereby, three-dimensional CO in the indoor space 80 can be generated ₂ The concentration distribution enables the air conditioner 10 to operate more efficiently.

In addition, for example, a plurality of COs ₂ The sensor 20 comprises more than 4 COs ₂ A sensor 20. Multiple CO ₂ 4 COs in sensor 20 ₂ The sensors 20 are disposed at four corners of the indoor space 80 in the first virtual plane.

Thus, CO is provided at four corners where the human 90 rarely exists ₂ Sensor 20, therefore consisting of 4 COs ₂ CO measured by sensor 20 ₂ The concentration is not directly affected by the carbon dioxide contained in the breath of the person 90. Therefore, CO in the virtual plane can be increased ₂ The estimation accuracy of the concentration distribution.

For example, the air conditioning system 101 according to the present embodiment further includes a human detection sensor 120 that detects a human present in the indoor space 80. The signal processing section 132 also estimates the first concentration distribution and the second concentration distribution based on the position of the person detected by the person detection sensor 120. In addition, for example, a plurality of COs ₂ Sensor 20 includes CO provided at the same position as human detection sensor 120 ₂ A sensor.

Thereby, CO can be generated ₂ The estimation of the concentration distribution reflects the influence of carbon dioxide exhaled by the person 90, and can increase CO ₂ The estimation accuracy of the concentration distribution.

[ multiple CO ] ₂ Modification of sensor arrangement]

In the following, fig. 6A to 6C are used to treat a plurality of COs ₂ A modified example of the arrangement of the sensor 20 will be described. FIGS. 6A to 6C show a plurality of COs, respectively ₂ Of the sensor 20Perspective views of the first to third examples of the arrangement.

In the example shown in FIG. 6A, 4 COs ₂ The sensors 20a to 20d are provided at four corners of the floor 82. In addition, 4 COs ₂ The sensors 20a to 20d may be provided at predetermined heights between the ceiling surface 81 and the floor surface 82.

In addition, in the example shown in FIG. 6B, 5 COs ₂ The sensors 20a to 20e are provided at the four corners and the center of the ceiling surface 81. And, CO ₂ The sensor 20f is disposed on the ground 82.CO 2 ₂ The sensor 20f is provided at one of the four corners of the floor 82, but may be provided at the center of the floor 82 or at a predetermined position between the center and the corner.

In addition, in the example shown in FIG. 6C, 4 COs ₂ The sensors 20a to 20d are provided at four corners of the floor 82. And, CO ₂ The sensor 20e is provided on the ceiling surface 81.CO 2 ₂ The sensor 20e is provided at one of the four corners of the ceiling surface 81, but may be provided at the center of the ceiling surface 81 or at a predetermined position between the center and the corner.

In addition, CO may be disposed at four corners of the ceiling surface 81 and the floor surface 82, respectively ₂ A sensor 20. That is, a total of 8 COs may be provided in the indoor space 80 ₂ A sensor 20. Alternatively, CO may be additionally provided at the center of at least one of ceiling surface 81 and floor surface 82 ₂ A sensor 20. A total of 10 COs may be provided in the indoor space 80 ₂ A sensor 20.

As described above, each of fig. 6A to 6C shows a plurality of CO in the rectangular parallelepiped indoor space 80 ₂ Examples of the configuration of the sensor 20. The shape of the indoor space 80 may not be a rectangular parallelepiped.

FIGS. 7A to 7F are diagrams showing the shape of the indoor space and a plurality of COs, respectively ₂ Top views of the first to sixth examples of the arrangement of the sensor 20.

In the example shown in fig. 7A, an indoor space 80a having a square shape in plan view is shown. That is, the ceiling surface 81 and the floor surface 82 are both square in plan view and have the same size. In addition, as shown in FIG. 7BIn the example, the indoor space 80b having a rectangular shape in plan view is shown. That is, the ceiling surface 81 and the floor surface 82 are rectangular in plan view and have the same size. In the case of FIGS. 7A and 7B, 4 COs are present ₂ The sensors 20a to 20d are arranged at four corners and 1 CO ₂ The sensor 20e is disposed at the center.

In the example shown in fig. 7C and 7D, an indoor space 80C having a trapezoidal shape in a plan view is shown. That is, the ceiling surface 81 and the floor surface 82 are trapezoidal in shape in plan view and have the same size.

In the case of FIG. 7C, 4 COs ₂ The sensors 20a to 20d are arranged at four corners, and 1 CO ₂ The sensor 20e is disposed at the center. The center here is the intersection of the diagonals of the trapezoid. In addition, CO ₂ The sensor 20e may be located at a position other than the four corners, and may be located at the center of gravity of a trapezoid, for example.

Alternatively, the trapezoidal indoor space 80c may be divided into a quadrangular region 80c1 and a triangular region 80c 2.5 COs as shown in FIG. 7D ₂ The sensors 20a to 20e are disposed at the four corners and the center of the quadrangular region 80c 1. In addition, CO ₂ The sensors 20c, 20d, and 20f are arranged in the triangular shape of the triangular region 80c2. 1 CO is disposed at a vertex shared by the quadrangular region 80c1 and the triangular region 80c2 ₂ Sensor (specifically, CO) ₂ Sensor 20c or 20 d).

In the example shown in fig. 7E, an indoor space 80d having a shape in plan view represented by a combination of a plurality of quadrangles is shown. The indoor space 80d can be divided into a large quadrangular region 80d1 and a small quadrangular region 80d2.5 CO ₂ The sensors 20a to 20e are disposed at the four corners and the center of the quadrangular region 80d 1. In addition, CO ₂ The sensors 20d, 20f to 20h are disposed at four corners of the quadrangular region 80d2. 1 CO is disposed at a vertex shared by the quadrangular region 80d1 and the quadrangular region 80d2 ₂ Sensor (specifically, CO) ₂ Sensor 20 d). In addition, CO may be disposed also in the center of the small quadrangular region 80d2 ₂ A sensor 20.

In the example shown in fig. 7F, an indoor space 80e having a circular shape in plan view is shown. That is, the ceiling surface 81 and the floor surface 82 are both circular in plan view and have the same size. In this case, 4 COs ₂ The sensors 20a to 20d are arranged at equal intervals along the circumference. In addition, CO ₂ The sensor 20e is arranged at the center of the circle. The indoor space 80e may have an elliptical shape in plan view.

In the present embodiment, CO is provided at each of four corners of the ceiling surface 81 ₂ Although the sensor 20 is illustrated, at least one of the four corners may not be provided with CO ₂ A sensor 20. Without CO provision ₂ CO of the location of the sensor 20 ₂ In concentrations capable of other CO ₂ The average of the measurements of the sensor 20. This is because of the CO at the four corners of the indoor space 80, for example, in a place where there is no person 90 ₂ Concentration of CO due to agitation of the space gas stream ₂ The difference in concentration is small. That is, the CO at the four corners ₂ The concentration becomes approximately the same value.

(embodiment mode 3)

Next, embodiment 3 will be explained.

Embodiment 3 is mainly different from embodiments 1 and 2 in that the ratio measurement of CO is performed ₂ CO at a later time than the concentration ₂ And (4) estimating the concentration. In the following description, differences from embodiments 1 and 2 will be mainly described, and descriptions of common points will be omitted or simplified.

[ Structure ]

First, the configuration of the air conditioning system according to embodiment 3 will be described with reference to fig. 8. Fig. 8 is a diagram showing the configuration of an air conditioning system 201 according to the present embodiment.

As shown in fig. 8, an air conditioning system 201 includes an air conditioner 10 and a CO ₂ A sensor 20, a human detection sensor 120, a control device 230, and a cloud server 40.

Controller 230 estimates the ratio and measures CO ₂ CO at a second time after the first time of concentration ₂ And (4) concentration. In the present embodiment, it is preferred that,the control device 230 includes a signal processing unit 232 and a control unit 233 instead of the signal processing unit 32 and the control unit 33, as compared with the control device 30 according to embodiment 1.

The signal processing unit 232 is based on the CO ₂ CO measured by sensor 20 ₂ The concentration and the number of people detected by the people detection sensor 120 are used to estimate the ratio of the measured CO ₂ CO at a second time after the first time of concentration ₂ And (4) concentration. The second time is, for example, 10 minutes, 30 minutes, or 1 hour after the first time. The second moment is in comparison with CO ₂ The estimated time of the concentration is a later future time. That is, the signal processing unit 232 performs CO ₂ And (4) predicting the concentration.

The signal processing unit 232 utilizes the following phenomenon: CO at a specified location ₂ The concentration increases in proportion to the number of persons and the time of the persons existing in the indoor space 80. The predetermined position is a place where people move little, such as a corner of the floor 82.

FIG. 9 is a schematic view showing CO ₂ Graph of the time variation of the concentration. In FIG. 9, the horizontal axis represents time (unit: minute) and the vertical axis represents CO ₂ Concentration (unit: ppm). FIG. 9 shows CO in the case where the number of people is not increased or decreased in a closed space of a predetermined size ₂ Measured values obtained from changes in concentration. As shown in FIG. 9, CO was observed ₂ The proportion of increase in concentration is approximately fixed.

Thereby, CO at the second time at the predetermined position ₂ The concentration can be easily expressed by a linear function with time as a variable. The signal processing unit 232 estimates CO based on the following equations (2) and (3) ₂ And (4) concentration.

(2)A(t)＝f(n)×(t-t0)+γ×A(t0)+η

(3)B(t)＝α×A(t)+β

In equations (2) and (3), n is the number of persons detected by the person detection sensor 120. t0 is formed by CO ₂ Measurement of CO by sensor 20 ₂ The first moment of concentration. t is a second time later than the first time and is CO ₂ The time of prediction of the concentration.

A (t) is the set of CO at time t ₂ CO at position P0 of sensor 20 ₂ And (4) concentration. A (t 0) is derived from CO ₂ CO obtained by sensor 20 ₂ The measured value of the concentration corresponds to a so-called initial value. B (t) is CO at a position P1 different from the position P0 at the time t ₂ An estimate of the concentration. As shown in fig. 8, the position P1 is included in the ground 82, for example. The position P1 is on a vertical line passing through the position P0. The position P1 may be an arbitrary position on the vertical line.

α, β, γ and η are coefficients. As in embodiment 1, α and β may be different values depending on the position to be estimated. γ and η are values determined based on the operating state of the air conditioner 10.

f (n) is a function of the number of people as a factor. The more the number of people, the more CO ₂ The more the concentration is increased and the fewer the number of people is, the CO ₂ The less the increase in concentration. Representing the number of people and CO by a function f (n) ₂ The relationship of concentration. f (n) × (t-t 0) is expressed in the following CO ₂ CO whose concentration increases in the period from the measurement time t0 to the prediction time t (i.e., the elapsed time t-t 0) according to the number n of people present in the indoor space 80 ₂ And (4) concentration. For example, if a CO of multiple persons is assumed ₂ If the discharge amounts are the same, f (n) = n × (CO per person per unit time) ₂ Concentration).

The control unit 233 is based on the CO estimated by the signal processing unit 232 ₂ Concentrations a (t) and B (t) to control the air conditioning apparatus 10. In particular, in CO ₂ When the concentrations a (t) and B (t) are greater than the threshold Dth, the control unit 233 controls the air-conditioning equipment 10 so that CO is present ₂ The concentration is below the threshold Dth at time t. That is, even in CO ₂ If the concentration does not exceed the threshold Dth at the current time (first time), the control unit 233 controls the air conditioner 10 so that the air supply and exhaust function takes priority over the indoor temperature adjustment function, as needed.

[ actions ]

Next, the operation of the air conditioning system 201 according to the present embodiment will be described with reference to fig. 10. Fig. 10 is a flowchart illustrating an operation of the air conditioning system 201 according to the present embodiment. Fig. 10 mainly shows the operation of the control device 230.

As shown in fig. 10, first, the control unit 233 acquires the capability information of the air supply and exhaust function of the air conditioner 10 (S10). Next, the signal processing unit 232 acquires the number-of-persons information indicating the number of persons n detected by the person detection sensor 120 via the first communication unit 31 (S30). The number-of-people information may be acquired (S30) prior to the acquisition of the capability information (S10), or may be acquired in the next CO ₂ The measurement value of the concentration is acquired (S11).

Then, the signal processing unit 232 receives the signal from the CO via the first communication unit 31 ₂ Sensor 20 acquiring CO ₂ The measured value of concentration (S11). CO 2 ₂ The sensor 20 measures CO at the installation position P0 based on an instruction from the control unit 33, for example ₂ Concentration of CO and will represent the measured CO ₂ The information of the density is output to the control device 230. The obtained measurement value is a (t 0) in formula (2).

Next, the signal processing unit 232 estimates CO ₂ The sensor 20 measures the concentration a (t) at the measurement position P0 at the time t (S32). Specifically, the signal processing unit 232 compares the number of people n with the number of CO ₂ The concentration A (t 0) is substituted into the formula (2) to calculate CO ₂ Concentration A (t).

Next, the signal processing unit 232 estimates CO at time t at a position P1 different from the measurement position P0 ₂ The concentration B (t) (S33). Specifically, the signal processing unit 232 calculates CO by substituting the calculated a (t) into equation (3) ₂ Concentration B (t).

At this time, the signal processing unit 232 may calculate CO at time t at each of a plurality of positions different from the measurement position P0 ₂ And (4) concentration. For example, the signal processor 232 may calculate CO along the vertical line VL ₂ Vertical distribution of the predicted values of concentration. As in embodiment 1, CO can be calculated by applying equation (1) for each height from the ground 82 ₂ Vertical distribution of the predicted values of concentration.

Then, the signal processing unit 232 converts CO ₂ The concentration B (t) is compared with a threshold Dth (S34). In addition, a plurality of COs are calculated ₂ In the case of the concentration B (t), the signal processing unit 232 selects a plurality of CO ₂ Extraction in concentration B (t)A maximum value Dmax (t), and comparing the extracted maximum value Dmax (t) with a threshold Dth.

In CO ₂ When the concentration B (t) is equal to or lower than the threshold Dth (yes in S34), the control unit 233 maintains the current control conditions of the air conditioner 10 (S15). That is, since CO is predicted ₂ Since the concentration does not exceed the threshold Dth at the future time t, CO in the indoor space 80 ₂ The concentration is within the allowable range, and the control conditions may not be changed.

In CO ₂ When the concentration B (t) exceeds the threshold Dth (no in S34), the control unit 233 determines to make CO based on the capacity information ₂ And a control condition that the concentration B (t) is equal to or less than the threshold Dth at the time t (S36). For example, the control unit 233 calculates to make CO ₂ The concentration B (t) is a required supply/exhaust gas amount equal to or less than the threshold Dth, and control conditions for realizing the calculated supply/exhaust gas amount are determined. Since the capability information is used to determine the control condition, the acquisition of the capability information (S10) may be determined to be CO ₂ The concentration B (t) is performed after exceeding the threshold Dth.

Next, the control unit 233 calculates a start time ts for operating the air conditioner 10 under the determined control condition (S37). The start time ts is a time after the first time t0 and before the second time t. That is, to make CO ₂ The concentration B (t) is equal to or less than the threshold Dth at the second time t, and the operation of the air conditioner 10 giving priority to the air supply/discharge function should be started. In general, even if the air supply and exhaust function is prioritized, CO in the indoor space 80 ₂ The concentration reduction also requires a certain period of time. Therefore, by operating the air conditioner 10 so as to give priority to the air supply and exhaust function from the time ts before the second time t, CO can be avoided ₂ The concentration B (t) exceeds the threshold Dth at the second time t. For example, when the air supply/exhaust function is operated at the maximum output, CO ₂ In the case where it takes 30 minutes for the concentration B (t) to fall below the threshold Dth, the control unit 233 determines t-30 minutes as time ts.

Next, when the time ts is reached, the control unit 233 controls the air conditioner 10 under the control conditions determined in step S36 (S38). That is, after time ts, the control unit 233 controls the air conditioning equipment 10 so that the air supply and exhaust function takes precedence over the indoor temperature adjustment function.

After that, control device 230 repeats the processing from step S30 after the time t plus Δ t (S39). Δ t is, for example, 1 second, 10 seconds, 1 minute, 10 minutes, or the like, but is not particularly limited.

Thereby, the CO in the predicted indoor space 80 ₂ When the concentration B (t) exceeds the threshold Dth, the air conditioner 10 can be operated to avoid CO ₂ The concentration exceeds the threshold value Dth. Thus, CO generation can be avoided ₂ The period in which the density exceeds the threshold Dth can maintain the comfort of the indoor space 80.

[ Effect and the like ]

As described above, in the air conditioning system 201 according to the present embodiment, the signal processing unit 232 further estimates the second concentration at the second time after the first time at which the first concentration was measured, based on the number of people present in the indoor space 80.

This enables the air conditioner 10 to operate to avoid CO ₂ Since the density exceeds the threshold Dth, the comfort of the indoor space 80 can be maintained. Further, since the operation of giving priority to the air supply/exhaust function can be performed with a margin, it is possible to suppress a change in temperature or humidity due to rapid ventilation. Therefore, the operation of the indoor temperature adjusting function for keeping the temperature or humidity constant can be suppressed, and thus an increase in power consumption can be suppressed.

For example, when the number of people is n, the first time is t0, the second time is t, the second concentration is B (t), and the predicted value of the concentration of carbon dioxide at the first position at the second time is a (t), the signal processing unit 232 estimates the second concentration based on the above equations (2) and (3).

This makes it possible to reduce the amount of computation required to efficiently control the air conditioner 10, because complex computation with a large processing amount is not required.

Note that, the air conditioning system 201 may be the same as embodiment 2Having a plurality of COs ₂ Sensor 20, may also estimate multiple COs ₂ CO at first timing on installation surface of sensor 20 ₂ And (4) concentration distribution. Or based on the estimated CO at the first time instant ₂ Concentration profile to estimate CO at a second time ₂ And (4) concentration distribution.

(embodiment mode 4)

Next, embodiment 4 will be explained.

Embodiment 4 is mainly different from embodiments 1 to 3 in that it includes a presentation unit that presents predetermined information. In the following, differences from embodiments 1 to 3 will be mainly described, and descriptions of common points will be omitted or simplified.

[ Structure ]

First, the configuration of the air conditioning system according to embodiment 4 will be described with reference to fig. 11. Fig. 11 is a diagram showing the configuration of an air conditioning system 301 according to the present embodiment. As shown in fig. 11, the air conditioning system 301 further includes an information presentation unit 330, as compared with the air conditioning system 1 according to embodiment 1.

Fig. 12 is a diagram showing the configuration of the information presentation unit 330 according to the present embodiment. As shown in fig. 12, the information presentation unit 330 includes a display monitor 331, a sound generation unit 333, and a light generation unit 335. The information presentation unit 330 presents CO at a predetermined position in the room ₂ Information about the concentration. Specifically, the information presenting unit 330 presents and utilizes the CO ₂ CO estimated from measurement values obtained by sensor 20 ₂ Concentration (second concentration) related information.

The display monitor 331 displays the CO and the content ₂ A display part of the image of the information related to the density. The display monitor 331 is implemented by, for example, a liquid crystal display panel, an organic EL display panel, or the like. Displaying CO in display monitor 331 ₂ An average value at a specific moment of concentration and/or a monitored time variation. CO 2 ₂ Monitoring of the concentration shows for example CO at a location of 1.2m above the ground ₂ Display of the temporal change in concentration. 1.2m corresponds approximately to the vicinity of the trunk of a standing person. For example, in the display monitor of FIG. 12In the unit 331, time is represented by the horizontal axis and CO is represented by the vertical axis ₂ Graph of concentration to show CO ₂ Temporal change in concentration (monitoring result).

When the average value is displayed, for example, a plurality of points such as 0.6m, 1.2m, 1.8m above the ground may be extracted and averaged. This can approximate CO to which the entire human body is exposed ₂ Approximate value of concentration. For example, CO showing a plurality of positions is displayed on the display monitor 331 of fig. 12 ₂ Text information of the average value of the density.

The display monitor 331 may display a warning as an example of information presentation when a predetermined condition is satisfied. The specified condition being, for example, CO ₂ The concentration deviates from the specified range. Whether or not the predetermined condition is satisfied is determined by, for example, the control unit 33 of the control device 30 or the control unit (not shown) of the information presentation unit 330.

CO ₂ The predetermined range of the concentration is, for example, 300ppm at the lower limit and 1000ppm at the upper limit, but is not limited thereto. In general, the CO of the outdoor atmosphere ₂ The concentration is about 400 ppm. In addition, CO from the viewpoint of comfort ₂ The upper limit of the concentration is set to 1000ppm. If CO is present ₂ If the concentration is much lower than 400ppm, toxic gas different from air may be introduced. Therefore, not only the upper limit but also CO is determined from the viewpoint of comfort ₂ The lower limit of the concentration. Thereby, the air conditioning system 301 more useful from the viewpoint of comfort and safety is realized.

When the warning is displayed, the display monitor 331 displays CO ₂ The display color of the numerical value of the density becomes red. Alternatively, as shown in fig. 12, a bright point display 332 of a predetermined color (for example, red) is displayed as an abnormal point in the monitor display.

The sound generation unit 333 and the light generation unit 335 are examples of warning units that perform warning. The sound generation unit 333 and the light generation unit 335 issue a warning when a predetermined condition is satisfied.

The sound generating unit 333 is a speaker that generates a predetermined sound such as a warning sound. The warning sound generated by the sound generation unit 333 is an example of presentation by sound.

The light generating unit 335 is a light source unit that emits visible light, and is, for example, a red light such as a warning light that emits red light. The red light emitted by the light generating unit 335 is an example of the presentation using light.

The information presented by the information presentation unit 330 is not limited to CO alone ₂ The value of the concentration. For example, the information presentation unit 330 may present CO ₂ The region having a concentration within a predetermined range, i.e. CO ₂ The volume ratio (hereinafter referred to as "good space ratio") of the low-concentration comfortable space in the indoor space 80. For example, a good spatial ratio (unit:%) is displayed in the display monitor 331 of fig. 12. Thereby, only CO is displayed ₂ The environmental condition in the indoor space 80 can be grasped by comparing the average values of the concentrations.

The good spatial proportion is estimated, for example, by the signal processing unit 32 of the control device 30. Specifically, the signal processing unit 32 is based on CO in the indoor space 80 ₂ Estimation of three-dimensional distribution of concentration to calculate CO ₂ The volume of the region having a concentration within the specified range. The volume (volume) of the indoor space 80 is stored in the storage unit 34 in advance, for example. This enables the signal processing unit 32 to calculate a good spatial ratio.

In this case, the information presentation unit 330 may give a warning when the ratio of good space is lower than a predetermined value. The warning is at least one of the display monitor 331 changing the display color, the sound generation unit 333 generating a warning sound, and the light generation unit 335 generating red light. The predetermined value is a lower limit value of a preset allowable range, and is stored in the storage unit 34, for example.

In addition, the information presentation unit 330 may present CO to CO ₂ The estimated time until the concentration deviates from the predetermined range. For example, the display monitor 331 of fig. 12 displays the CO-containing gas ₂ The estimated time until the concentration deviates from the predetermined range in the indoor space 80 is used as the predicted recommended ventilation time. This makes it possible to predict an environmental abnormality in the indoor space 80 in advance.

Predicting time, e.g. by controlThe signal processing section 32 of the device 30. Specifically, the signal processing unit 32 is based on CO in the indoor space 80 ₂ Time change of concentration in CO ₂ CO based on estimated time points in case of increasing concentration ₂ The time until the instantaneous value of the concentration reaches the upper limit value of the predetermined range is estimated based on the ratio of the change to the instantaneous value of the concentration.

[ Effect and the like ]

As described above, the air conditioning system 301 according to the present embodiment includes the presentation and CO ₂ And an information presentation unit 330 for information on density.

Thereby, CO in the indoor space 80 is presented ₂ The information on the density is therefore useful for assisting a user located in the indoor space 80, a manager of the indoor space 80, or the like in grasping and coping with the environmental state in the space.

In addition, for example, the signal processing unit 32 may estimate CO of the indoor space 80 ₂ Volume fraction of the region having a concentration within a prescribed range. The information presenting section 330 may present the estimated volume ratio.

Thus, CO is present ₂ The proportion of the region where the density is low (i.e., the comfortable region) can therefore notify the user, the manager, or the like of the environmental state in the space in a more understandable manner.

For example, when the volume ratio is lower than a predetermined value, the information presentation unit 330 may perform at least one of screen display, presentation by sound, and presentation by light.

This makes it possible to give a warning when the proportion of the comfortable area is small.

In addition, for example, the signal processing unit 32 may estimate CO up to the indoor space 80 ₂ The estimated time until the concentration deviates from the predetermined range. The information presentation section 330 may also present the estimated time.

Thereby, it is displayed until it becomes due to CO ₂ Since the estimated time until the increase in concentration impairs comfort, the user, the administrator, or the like can be notified of the environmental state in the space in a manner that is easier to understand.

In addition, theE.g. in CO ₂ When the density is out of the predetermined range, the information presentation unit 330 may perform at least one of screen display, presentation by sound, and presentation by light.

This makes it possible to warn that comfort or safety may be impaired.

The information presentation unit 330 may be separate from the control device 30 and may be configured to be capable of wired or wireless communication with each other. For example, the information presentation unit 330 may be an information processing terminal such as a smartphone, a tablet terminal, or a personal computer that the person 90 has. Alternatively, the information presentation unit 330 may be 1 unit integrated with the control device 30.

The information presentation unit 330 may not include the sound generation unit 333 and the light generation unit 335. The sound generation unit 333 may output information displayed on the display monitor 331 as sound. That is, the sound generation unit 333 not only generates a warning but also has a function of presenting information. In this case, the information presentation unit 330 may not include the display monitor 331.

(others)

The air conditioning system and the program according to the present invention have been described above based on the above-described embodiments and the like, but the present invention is not limited to the above-described embodiments.

For example, one embodiment of the present invention may be implemented as a building including the air conditioning system 1, 101, or 201 according to each of the embodiments described above. Specifically, the building is a general home, office building, school, hospital, nursing facility, or the like having the indoor space 80, but is not limited thereto. In addition, one aspect of the present invention may also be implemented as part of such buildings (e.g., a room). Further, an embodiment of the present invention can be realized as a mobile body such as an electric train, a bus, or a ship that includes the air conditioning system and the indoor space 80.

In addition, for example, in the above embodiments, the use of CO is shown ₂ CO obtained by sensor 20 ₂ Measured value of concentration and a plurality of estimates estimated based on the measured valueAn example of giving priority to the air discharge function when the maximum value Dmax among the count values exceeds the threshold Dth is not limited to this. For example, the signal processing unit 32, 132, or 232 may calculate a difference between the maximum value Dmax and the minimum value Dmin. Minimum Dmin is by CO ₂ CO obtained by sensor 20 ₂ A measurement value of the concentration, and a minimum value among a plurality of estimation values estimated based on the measurement value.

As mentioned above, CO ₂ The concentration increases in a region from the vicinity of the mouth of the person 90 to vertically above the person 90, with CO increasing with distance from the person 90 ₂ The lower the concentration tends to be. However, if the indoor space 80 is not ventilated and the amount of carbon dioxide discharged from the person 90 increases, carbon dioxide accumulates in the indoor space 80 and CO accumulates ₂ The concentration becomes uniform as a whole. Therefore, the difference between the maximum value Dmax and the minimum value Dmin becomes smaller than a predetermined threshold value. Therefore, the control unit 33 may control the air conditioner 10 such that the air supply and exhaust function is prioritized over the indoor temperature adjustment function when the calculated difference is smaller than the predetermined threshold value. This can maintain the comfort of the indoor space 80.

Alternatively, the control section 33 may also be CO at the surface 82 ₂ When the estimated value of the concentration exceeds the predetermined threshold value, the air conditioner 10 is controlled so that the air supply and exhaust function takes precedence over the indoor temperature adjustment function. CO near the floor 82 at a position distant from the person 90 such as four corners of the floor 82 of the indoor space 80 ₂ When the concentration is higher than the predetermined threshold, it can be determined that the indoor space 80 as a whole contains a large amount of carbon dioxide and ventilation is to be performed.

In addition, in each embodiment, CO is explained ₂ The sensor 20 is provided on the ceiling surface or the floor surface, but is not limited thereto. For example, CO ₂ The sensor 20 may also be a CO of the portable type which is easy to carry ₂ A sensor. For example, CO of the hand-held type ₂ The sensor 20 may be installed on a desk or the like by the person 90 and measure CO ₂ And (4) concentration. In this case, CO ₂ The estimation formula of the concentration is also different from the above. For example, the signal processing unit 32, 132 or 232 may be disposed on a deskCO ₂ Height of sensor from ground and CO of installation place ₂ The distribution in the height direction is estimated using a linear expression with the concentration as a reference.

In addition, for example, when CO ₂ And when the concentration deviates from the allowable range, an alarm is given, so that the method can be used for remote diagnosis in the field. In addition to this, in CO ₂ Even when the concentration is an abnormal value, the method can be used for business assistance of a maintenance person in charge such as a facility manager for diagnosing a sensor failure and/or for contact repair.

The communication method between the apparatuses described in the above embodiments is not particularly limited. When wireless communication is performed between devices, the wireless communication method (communication standard) is short-range wireless communication such as ZigBee (registered trademark), bluetooth (registered trademark), or wireless LAN (Local Area Network). Alternatively, the wireless communication method (communication standard) may be communication via a wide area communication network such as the internet. Instead of wireless communication, wired communication may be performed between the apparatuses. Specifically, the wired Communication is Communication using a Power Line Communication (PLC) or a wired LAN.

In the above-described embodiment, the process executed by a specific processing unit may be executed by another processing unit. Further, the order of more processes may be changed, or a plurality of processes may be executed in parallel. The allocation of the components included in the air conditioning system 1, 101, or 201 to a plurality of devices is an example. For example, a component provided in one device may be provided in another device.

For example, the processing described in the above embodiment may be realized by performing centralized processing using a single apparatus (system), or may be realized by performing distributed processing using a plurality of apparatuses. The processor that executes the program may be singular or plural. That is, the collective processing may be performed, or the distributed processing may be performed.

In the above-described embodiment, all or part of the components such as the control unit may be configured by dedicated hardware, or may be realized by executing a software program suitable for each component. Each component can be realized by a program execution Unit such as a CPU (Central Processing Unit) or a processor reading out and executing a software program recorded in a recording medium such as a HDD (Hard Disk Drive) or a semiconductor memory.

The components such as the control unit may be constituted by one or more circuits. The one or more circuits may be general-purpose circuits or dedicated circuits, respectively.

The one or more circuits may include, for example, a semiconductor device, an IC (Integrated Circuit), an LSI (Large Scale Integration), or the like. The IC or LSI may be integrated into one chip or may be integrated into a plurality of chips. It is referred to as IC or LSI, but the term "LSI" may be used as long as it varies depending on the degree of Integration, and may be referred to as system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). In addition, an FPGA (Field Programmable Gate Array) programmed after the manufacture of the LSI can also be used for the same purpose.

In addition, the general or specific aspects of the present invention may be implemented by a system, an apparatus, a method, an integrated circuit, or a computer program. Alternatively, the present invention can be realized by a non-transitory computer-readable recording medium such as an optical disk, an HDD, or a semiconductor memory, in which the computer program is stored. In addition, the present invention can be realized by any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

In addition, the present invention includes an embodiment obtained by applying various modifications to the respective embodiments, or an embodiment obtained by arbitrarily combining the structural elements and functions in the respective embodiments within a range not departing from the gist of the present invention.

Description of the reference numerals

1. 101, 201, 301: an air conditioning system; 10: an air conditioning device; 11: a gas supply device; 12: an exhaust apparatus; 20. 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h: CO 2 ₂ A sensor; 32. 132, 232: a signal processing unit; 33. 233: a control unit; 80. 80a, 80b, 80c, 80d, 80e: an indoor space; 81: a ceiling face; 82: a ground surface; 90. 92: a human; 120: a human detection sensor; 330: an information presenting part.

Claims (18)

1. An air conditioning system is provided with:

an air conditioning apparatus having a supply/discharge function and an indoor temperature adjustment function, for performing air conditioning of an indoor space;

CO ₂ a sensor disposed at a first location within the indoor space that measures a first concentration of carbon dioxide at the first location;

a signal processing part based on the CO ₂ Estimating a second concentration of carbon dioxide at each of one or more second locations by the first concentration measured by the sensor, wherein the second location is at a different height from a floor or ceiling surface of the indoor space than the first location; and

a control unit that controls the air conditioning equipment based on the first concentration and the second concentration.

2. The air conditioning system of claim 1,

the first location is at the ceiling face or the floor.

3. The air conditioning system according to claim 1 or 2,

in the case where the first concentration is set to a and the second concentration is set to B,

the signal processing section is based on the following equation: b = α × a + β to estimate the second concentration, where α and β are coefficients.

4. The air conditioning system according to any one of claims 1 to 3,

the first location is located on the ceiling face,

the one or more second positions are a plurality of second positions different from each other on a vertical line passing through the first position.

5. The air conditioning system according to claim 1 or 2,

a plurality of said COs ₂ The sensor is provided with a sensor which is used for detecting the position of the sensor,

a plurality of said CO ₂ The sensor is located in a first virtual plane parallel to the ceiling surface or the ground surface,

the signal processing unit is based on a plurality of the COs ₂ Respective CO in the sensor ₂ Estimating a first concentration distribution of carbon dioxide in the first virtual plane from the first concentration measured by the sensor,

the signal processing unit estimates a second concentration distribution of carbon dioxide in one or more second virtual planes that are parallel to the first virtual plane and that respectively include the one or more second positions, based on the estimated first concentration distribution.

6. The air conditioning system of claim 5,

a plurality of said CO ₂ The sensor comprises more than 4 COs ₂ The sensor is provided with a sensor which is used for detecting the position of the sensor,

a plurality of said CO ₂ 4 COs in the sensor ₂ The sensors are arranged at four corners of the indoor space in the first virtual plane.

7. The air conditioning system of claim 5 or 6,

further comprises a human detection sensor for detecting a human being present in the indoor space,

the signal processing section further estimates the first concentration distribution and the second concentration distribution based on a position of the person detected by the person detection sensor.

8. The air conditioning system of claim 7,

a plurality of said CO ₂ Including in the sensor set up in with the CO of people detection sensor looks same position ₂ A sensor.

9. The air conditioning system according to any one of claims 1 to 8,

the signal processing unit further estimates the second concentration at a second time later than a first time at which the first concentration is measured, based on the number of people present in the indoor space.

10. The air conditioning system of claim 9,

when the number of people is n, the first time is t0, the second time is t, the second concentration is B (t), and the predicted value of the concentration of carbon dioxide at the first position at the second time is A (t),

the signal processing section estimates the second density based on the following 2 equations,

A(t)＝f(n)×(t-t0)+γ×A(t0)+η

B(t)＝α×A(t)+β

wherein, alpha, beta, gamma and eta are coefficients, and f (n) is a function with n as a variable.

11. The air conditioning system according to any one of claims 1 to 10,

the control unit controls the air conditioner so that the air supply/discharge function takes precedence over the indoor temperature adjustment function when at least one of the first concentration and one or more of the second concentrations exceeds a predetermined threshold value.

12. The air conditioning system according to any one of claims 1 to 11,

the display device further includes a presentation unit that presents information related to the second concentration.

13. The air conditioning system of claim 12,

the signal processing unit estimates a volume ratio of a region in the indoor space where the second concentration is within a predetermined range,

the presenting part presents the volume ratio.

14. The air conditioning system of claim 13,

when the volume ratio is less than a predetermined value, the presentation unit performs at least one of screen display, presentation using sound, and presentation using light.

15. The air conditioning system according to any one of claims 12 to 14,

the signal processing unit estimates an estimated time until the second concentration in the indoor space deviates from a predetermined range,

the presenting section presents the estimated time.

16. The air conditioning system according to any one of claims 12 to 15,

the presentation unit performs at least one of screen display, presentation by sound, and presentation by light when the second density is out of a predetermined range.

17. A building provided with the air conditioning system according to any one of claims 1 to 16.

18. A program for causing a computer to execute a control method for controlling an air conditioning apparatus having a supply/discharge function and an indoor temperature adjusting function for performing air conditioning of an indoor space,

in the control method, the control unit is provided with a control unit,

from CO located at a first location in the indoor space ₂ A sensor obtains a first concentration of carbon dioxide at the first location,

estimating a second concentration of carbon dioxide at each of one or more second locations based on the first concentration, wherein the second location is at a different height from a floor or ceiling face of the indoor space than the first location,

controlling the air conditioning device based on the first concentration and the second concentration.

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