Management device

Abstract

To provide a management device capable of managing, over a long period of time, adsorption performance of a chemical adsorption building material disposed in a living space of a residence where a user lives.SOLUTION: Provided is a management device mounted on a surface of a chemical adsorption building material disposed in a living space of a residence where a user lives, that manages adsorption performance of the chemical adsorption building material, the management device comprising: a hollow housing having an opening formed therein through which a portion of the surface of the chemical adsorption building material is exposed; an air inlet formed in the housing to draw air in the living space into the housing; an air outlet formed in the housing to discharge air in the housing into the living space; a first sensor for detecting the concentration of chemical substances in air at the air inlet; a second sensor for detecting the concentration of chemical substances in air at the air outlet; and a processing part for calculating adsorption performance of the chemical adsorption building material on the basis of values detected by the first sensor and the second sensor.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a management device for managing the adsorption performance of chemical substance adsorbing building materials.

Background Art

[0002] In houses where measures for preventing sick house syndrome are taken, chemical substance adsorbing building materials having the performance of adsorbing formaldehyde, volatile organic compounds (VOCs), etc. released from building materials are often used as wall materials of houses. As a test for evaluating the adsorption performance of chemical substance adsorbing building materials, a reduction performance test method by a small chamber method is known.

[0003] Note that Patent Document 1 below discloses a VOC removal device for purifying exhaust gas from a factory and discharging it to the outside.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Since the reduction performance test method by the small chamber method uses a chemical substance adsorbing building material in a new state as a test target, it is impossible to evaluate the deterioration of the adsorption performance during long-term use over several years to several decades.

[0006] The present invention has been made in view of such circumstances, and an object thereof is to obtain a management device capable of managing the adsorption performance of chemical substance adsorbing building materials arranged in the living room of a house where a user lives over a long period of time.

Means for Solving the Problems

[0007] The management device according to the first aspect of the present invention is a management device that is attached to the surface of a chemical substance adsorbing building material disposed in a living room of a house where a user lives, and manages the adsorption performance of the chemical substance adsorbing building material. The management device includes a hollow housing in which an opening is formed so that a part of the surface of the chemical substance adsorbing building material is exposed, an air supply port formed in the housing for taking in air in the living room into the housing, an exhaust port formed in the housing for discharging air in the housing into the living room, a first sensor for detecting the concentration of chemical substances in the air at the air supply port, a second sensor for detecting the concentration of chemical substances in the air at the exhaust port, and a processing unit for calculating the adsorption performance of the chemical substance adsorbing building material based on the detection value of the first sensor and the detection value of the second sensor.

[0008] According to the first aspect, the management device is attached to the surface of a chemical substance adsorbing building material disposed in a living room of a house where a user lives. The processing unit included in the management device calculates the adsorption performance of the chemical substance adsorbing building material based on the detection value of the first sensor and the detection value of the second sensor. Therefore, the adsorption performance of the chemical substance adsorbing building material disposed in the living room can be managed by the management device over a long period of time.

[0009] The management device according to the second aspect of the present invention is, in the first aspect, the ratio of the volume of the housing to the area of the opening is set to be equal to the ratio of the volume of the living room to the area of the chemical substance adsorbing building material.

[0010] According to the second aspect, the removal effect of chemical substances in the air in the housing by the chemical substance adsorbing building material exposed from the opening of the housing can be set to be equal to the removal effect of chemical substances in the air in the living room by the chemical substance adsorbing building material disposed in the living room. As a result, the adsorption performance of the chemical substance adsorbing building material disposed in the living room can be managed with high precision by the management device.

[0011] The management device according to the third aspect of the present invention is, in the first or second aspect, the number of air exchanges in the housing per unit time is set to be equal to the number of air exchanges in the living room per unit time.

[0012] According to the third aspect, the ventilation volume of the air in the housing can be set equal to the ventilation volume of the air in the living room. As a result, the adsorption performance of the chemical substance adsorbing building material disposed in the living room can be accurately managed by the management device.

[0013] The management device according to the fourth aspect of the present invention further includes a blower fan that forms an air flow from the air supply port to the exhaust port in the housing in the third aspect, and the processing unit sets the ventilation frequency of the air in the housing per unit time by controlling the air volume of the blower fan.

[0014] According to the fourth aspect, the ventilation frequency of the air in the housing per unit time can be accurately controlled by the air volume of the blower fan.

[0015] The management device according to the fifth aspect of the present invention, in the third or fourth aspect, the processing unit detects the start and end of the ventilation of the living room by opening the window based on the change in the detection value of the first sensor, and based on the detection value of the first sensor at the start time of the ventilation of the living room, the detection value of the first sensor after the start of the window-opening ventilation, and the volume of the living room, calculates the ventilation frequency of the air in the living room per unit time.

[0016] According to the fifth aspect, the ventilation frequency of the air in the living room per unit time can be calculated simply and accurately.

[0017] The management device according to the sixth aspect of the present invention, in any one of the first to fifth aspects, the processing unit calculates the cumulative adsorption amount of the chemical substance by the chemical substance adsorbing building material based on the detection value of the first sensor, the detection value of the second sensor, the ventilation volume of the air in the housing per unit time, and the area of the opening, and calculates the performance deterioration degree of the chemical substance adsorbing building material based on the cumulative adsorption amount and the maximum adsorption amount of the chemical substance by the chemical substance adsorbing building material.

[0018] According to the sixth aspect, the performance deterioration degree of the chemical substance adsorbing building material disposed in the living room can be accurately calculated based on the cumulative adsorption amount and the maximum adsorption amount.

[0019] In the seventh aspect of the present invention, the management device, in the sixth aspect, the chemical substance adsorbing building material adsorbs the chemical substance by chemical adsorption, and the processing unit predicts the lifespan of the chemical substance adsorbing building material based on the degree of performance degradation.

[0020] According to the seventh aspect, the lifespan of the chemical substance adsorbing building material arranged in the living room by chemical adsorption can be predicted with high accuracy based on the degree of performance degradation.

[0021] In the eighth aspect of the present invention, the management device, in the sixth aspect, the chemical substance adsorbing building material adsorbs the chemical substance by physical adsorption, and the processing unit predicts the ventilation timing of the living room based on the degree of performance degradation.

[0022] According to the eighth aspect, the ventilation timing of the living room in which the chemical substance adsorbing building material by physical adsorption is arranged can be predicted with high accuracy based on the degree of performance degradation.

[0023] In the ninth aspect of the present invention, the management device, in the sixth aspect, the chemical substance adsorbing building material adsorbs the chemical substance by chemical adsorption and physical adsorption, and the processing unit predicts the lifespan of the chemical substance adsorbing building material and the ventilation timing of the living room based on the degree of performance degradation.

[0024] According to the ninth aspect, the lifespan of the chemical substance adsorbing building material arranged in the living room can be predicted with high accuracy based on the degree of performance degradation, and the ventilation timing of the living room can be predicted with high accuracy based on the degree of performance degradation.

[0025] In the management device according to the tenth aspect of the present invention, in the ninth aspect, the processing unit detects the start of ventilation in the living room based on a change in the detection value of the first sensor, and after the start of ventilation in the living room, based on the detection value of the first sensor, the detection value of the second sensor, the ventilation volume of the air in the housing per unit time, the area of the opening, and the elapsed time since the start of ventilation in the living room, calculates the cumulative emission amount of the chemical substance from the chemical substance adsorbing building material, and based on the cumulative adsorption amount and the cumulative emission amount, calculates the chemical adsorption amount and the physical adsorption amount of the chemical substance by the chemical substance adsorbing building material.

[0026] According to the tenth aspect, the chemical adsorption amount and the physical adsorption amount of the chemical substance by the chemical substance adsorbing building material can be calculated with high accuracy based on the cumulative adsorption amount and the cumulative emission amount.

Effects of the Invention

[0027] According to the present invention, the adsorption performance of the chemical substance adsorbing building material arranged in the living room of the house where the user lives can be managed over a long period of time.

Brief Description of the Drawings

[0028]

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Mode for Carrying Out the Invention

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that elements denoted by the same reference numerals in different drawings indicate the same or corresponding elements.

[0030] FIG. 1 is a diagram schematically showing a living room 1 of a house where a user lives. The house has taken preventive measures against sick house syndrome. On one wall in the living room 1, a chemical substance adsorbing building material 2 having the performance of adsorbing formaldehyde, volatile organic compounds (VOCs), etc. released from building materials is used as a wall material or the like. The chemical substance adsorbing building material 2 may adsorb VOCs by chemical adsorption, may adsorb VOCs by physical adsorption, or may adsorb VOCs by both chemical adsorption and physical adsorption. A management device 10 for managing the adsorption performance of the chemical substance adsorbing building material 2 is attached on the surface of the chemical substance adsorbing building material 2. The living room 1 has a window 3. By the user opening the window 3, window ventilation of the air in the living room 1 can be performed.

[0031] FIGS. 2 to 7 are diagrams schematically showing the structure of the management device 10. The directions in each figure are indicated by the XYZ orthogonal coordinate system in the figure. The management device 10 includes a hollow housing 21 in which an opening 23 where a part of the surface of the chemical substance adsorbing building material 2 is exposed is formed.

[0032] FIG. 2 shows a front structure viewed in the -Z direction. On the front of the housing 21, a display unit 22 having a touch panel function is arranged. The display unit 22 is configured using a liquid crystal display, an organic EL display, or the like. Instead of the display unit 22 having a touch panel function, by implementing a communication function with a smartphone or the like held by the user in the management device 10, the display screen of the user's smartphone or the like may be substituted as the display unit 22 of the management device 10. Inside the housing 21, a controller 20 is arranged. The controller 20 is configured using a microcontroller or the like.

[0033] In Fig. 3(A), the rear structure viewed in the +Z direction is shown, and in Fig. 3(B), the rear structure viewed in the -Z direction is shown. An opening 23 is formed on the rear surface of the housing 21, through which a part of the surface of the chemical substance adsorbing building material 2 is exposed. By preparing a plurality of frame-shaped covers with different sizes and attaching any one of the frame-shaped covers to the opening 23, the area of the opening 23 can be arbitrarily set. Alternatively, by closing a part of the opening 23 with an adhesive tape, the area of the opening 23 can be arbitrarily set. The ratio of the volume inside the housing 21 to the area of the opening 23 is set equal to the ratio of the volume inside the living room 1 to the area of the chemical substance adsorbing building material 2.

[0034] Fig. 4 shows the upper surface structure viewed in the -Y direction. An air supply port 24 having a plurality of slits is formed on the upper surface of the housing 21 for taking in the air inside the living room 1 into the housing 21.

[0035] Fig. 5 shows the bottom surface structure viewed in the +Y direction. An exhaust port 25 having a plurality of slits is formed on the bottom surface of the housing 21 for discharging the air inside the housing 21 into the living room 1.

[0036] Fig. 6 shows the side surface structure viewed in the +X direction, and Fig. 7 shows the internal structure viewed in the +X direction. Inside the housing 21, a first sensor 27 for detecting the VOC concentration in the air near the air supply port 24 and a second sensor 28 for detecting the VOC concentration in the air near the exhaust port 25 are arranged. The detection values of the first sensor 27 and the second sensor 28 are input to the controller 20. Also, inside the housing 21, a blower fan 26 for forming an air flow from the air supply port 24 toward the exhaust port 25 inside the housing 21 is arranged.

[0037] The air volume corresponding to the rotation speed of the blower fan 26 is controlled by the controller 20. The controller 20 sets the number of air ventilation times inside the housing 21 per unit time equal to the number of air ventilation times inside the living room 1 per unit time. The house is equipped with a 24-hour ventilation system that constantly ventilates the air inside the house at a constant ventilation volume.

[0038] During normal times when the user does not perform window ventilation, the controller 20 sets the ventilation rate of the air inside the housing 21 per unit time to be equal to the ventilation rate corresponding to the ventilation volume of 24-hour ventilation.

[0039] During window ventilation when the user performs window ventilation, the controller 20 sets the ventilation rate of the air inside the housing 21 per unit time to be equal to the ventilation rate corresponding to the ventilation volume of window ventilation.

[0040] Figure 8 is a diagram showing a simplified functional configuration of the management device 10. The management device 10 includes a controller 20, an input unit 29, a display unit 22, a first sensor 27, a second sensor 28, and a blower fan 26. The input unit 29 is configured as a touch panel function that the display unit 22 has.

[0041] The controller 20 has a processing unit 31, a storage unit 32, and a communication unit 33. The processing unit 31 is configured using a processor such as a CPU. The storage unit 32 is configured using an HDD, an SSD, or a semiconductor memory, etc. The communication unit 33 is configured using a communication module corresponding to the communication standards with the first sensor 27, the second sensor 28, and the blower fan 26.

[0042] The storage unit 32 stores setting information 41 and measurement information 42. The setting information 41 and the measurement information 42 may be a database including a plurality of records.

[0043] Figure 9 is a flowchart showing the processing executed by the processing unit 31 in the initial setting. The initial setting is executed at the first startup of the system or when the chemical substance adsorption building material 2 is replaced.

[0044] First, in step SP11, the processing unit 31 acquires the input information input from the input unit 29 by the operator. The input information includes information on the type of the chemical substance adsorbing building material 2 indicating the presence or absence of the performance of chemical adsorption and physical adsorption. Further, the input information includes information indicating the maximum adsorption amount according to the area of the chemical substance adsorbing building material 2 and the content amount of the chemical adsorbent. When the chemical substance adsorbing building material 2 has the performance of both chemical adsorption and physical adsorption, the input information includes information indicating the individual maximum adsorption amounts of chemical adsorption and physical adsorption. Also, the input information includes information indicating the start date of use of the chemical substance adsorbing building material 2. The start date of use may be the completion date of construction of the chemical substance adsorbing building material 2. Further, the input information includes information indicating the volume of the living room 1. Also, the input information includes information indicating the constant ventilation amount of the 24-hour ventilation system of the house.

[0045] Next, in step SP12, the processing unit 31 creates the setting information 41 based on the input information acquired in step SP11.

[0046] FIG. 10 is a diagram schematically showing an example of the setting information 41. When the chemical substance adsorbing building material 2 has the performance of chemical adsorption, the setting information 41 includes information indicating the maximum adsorption amount of chemical adsorption and information indicating the start date of use of the chemical substance adsorbing building material 2. When the chemical substance adsorbing building material 2 has the performance of physical adsorption, the setting information 41 includes information indicating the maximum adsorption amount of physical adsorption. Also, the setting information 41 includes information indicating the volume of the living room 1. Also, the setting information 41 includes information indicating the air volume of the blower fan 26 corresponding to the constant ventilation amount of the 24-hour ventilation system of the house.

[0047] FIG. 11 is a flowchart showing the process executed by the processing unit 31 regarding the setting of the air volume of the blower fan 26 during window ventilation.

[0048] First, in step SP21, the processing unit 31 periodically acquires the detection value of the first sensor 27, and determines whether the window opening ventilation of the living room 1 has started based on the change in the detection value of the first sensor 27. When the detection value of the first sensor 27 drops by a predetermined value or more within a predetermined time, the processing unit 31 detects that the window opening ventilation has started.

[0049] When the start of the window opening ventilation is not detected (step SP21: NO), the processing unit 31 repeatedly executes the process of step SP21.

[0050] When the start of the window opening ventilation is detected (step SP21: YES), next, in step SP22, the processing unit 31 acquires the detection value of the first sensor 27 at the start time of the window opening ventilation. The start time of the window opening ventilation may be the time immediately before the detection value of the first sensor 27 drops by the predetermined value or more. The processing unit 31 calculates the generation amount of VOC generated in the living room 1 at the start time of the window opening ventilation by the following formula (1).

[0051] VOC generation amount [μg / h] = Detection value of the first sensor 27 at the start time of window opening ventilation [μg / m 3 × Ventilation volume of the 24-hour ventilation system in the living room 1 [m 3 / h] ··· (1)

[0052] Next, in step SP23, the processing unit 31 calculates the ventilation volume of the living room 1 by the window opening ventilation by the following formula (2).

[0053] Ventilation volume [m 3 / h] = VOC generation amount [μg / h] ÷ Detection value of the first sensor 27 that has dropped by a predetermined value or more after the start of the window opening ventilation [μg / m 3 ··· (2)

[0054] Next, in step SP24, the processing unit 31 calculates the number of ventilation times of the living room 1 by the window opening ventilation by the following formula (3).

[0055] Number of ventilation times of the living room 1 [times / h] = Ventilation volume [m 3 / h] ÷ Volume of the living room 1 [m3 ···(3)

[0056] In addition, during window ventilation, if the detected value of the first sensor 27 is zero or very small, the processing unit 31 may set an arbitrary maximum value (for example, 5 times / h) as the ventilation rate of the living room 1.

[0057] Next, in step SP25, the processing unit 31 sets the air volume of the blower fan 26 so that the ventilation rate of the air in the housing 21 is equal to the ventilation rate of the living room 1. The processing unit 31 stores the information indicating the set air volume of the blower fan 26 in the storage unit 32.

[0058] Next, in step SP26, the processing unit 31 periodically acquires the detected value of the first sensor 27, and determines whether there is a change in the state of window ventilation based on the change in the detected value of the first sensor 27. The state of window ventilation changes based on changes in the number of windows that can be opened, or changes in the external wind speed, etc. When the detected value of the first sensor 27 changes by a predetermined value or more within a certain period of time, the processing unit 31 detects that there has been a change in the state of window ventilation, and executes the processing after step SP23.

[0059] If there is no change in the state of window ventilation (step SP26: NO), next, in step SP27, the processing unit 31 periodically acquires the detected value of the first sensor 27, and determines whether the window ventilation of the living room 1 has ended based on the change in the detected value of the first sensor 27. When the detected value of the first sensor 27 rises by a predetermined value or more within a certain period of time, the processing unit 31 detects that the window ventilation has ended.

[0060] If the end of window ventilation is not detected (step SP27: NO), the processing unit 31 executes the processing after step SP26.

[0061] If the end of window ventilation is detected (step SP27: YES), next, in step SP28, the processing unit 31 returns the setting of the air volume of the blower fan 26 to the air volume during 24-hour ventilation.

[0062] FIG. 12 is a flowchart showing the processing executed by the processing unit 31 regarding the management of the adsorption performance of the chemical substance adsorbing building material 2 having chemisorption performance. In the following description, the management device 10 manages the adsorption performance of the chemical substance adsorbing building material 2 using the ventilation volume conversion value [m 3 / (h·m 2 )] per unit time and per unit area, but is not limited to this example.

[0063] First, in step SP31, the processing unit 31 acquires it by reading the setting information 41 from the storage unit 32.

[0064] Next, in step SP32, the processing unit 31 calculates the cumulative usage time of the chemical substance adsorbing building material 2 since the previous measurement.

[0065] Next, in step SP33, the processing unit 31 acquires the detection value of the first sensor 27.

[0066] Next, in step SP34, the processing unit 31 acquires the detection value of the second sensor 28.

[0067] Next, in step SP35, the processing unit 31 calculates the cumulative adsorption amount since the previous measurement by the following formula (4).

[0068] Cumulative adsorption amount [μg / m 2 = (detection value of the first sensor 27 [μg / m 3 - detection value of the second sensor 28 [μg / m 3 ) × ventilation volume of the housing 21 [m 3 / h] × elapsed time [h] ÷ area of the opening 23 [m 2 ··· (4)

[0069] The ventilation volume in formula (4) is the ventilation volume of 24-hour ventilation or the ventilation volume of window ventilation.

[0070] The processing unit 31 adds the cumulative adsorption amount from the previous measurement calculated for the current measurement to the database of the measurement information 42. Further, the processing unit 31 calculates the cumulative adsorption amount from the start of use of the chemical substance adsorbing building material 2 by summing up all the cumulative adsorption amounts included in the database of the measurement information 42.

[0071] Next, in step SP36, the processing unit 31 calculates, as the performance degradation degree of the chemical substance adsorbing building material 2, the ratio of the cumulative adsorption amount from the start of use to the maximum adsorption amount of the chemical substance adsorbing building material 2.

[0072] Next, in step SP37, the processing unit 31 predicts the lifespan of the chemical substance adsorbing building material 2 at which the above ratio becomes "1" based on the time-series change of the performance degradation degree of the chemical substance adsorbing building material 2.

[0073] FIG. 13 is a flowchart showing a first example of the processing executed by the processing unit 31 regarding the management of the adsorption performance for the chemical substance adsorbing building material 2 having the physical adsorption performance.

[0074] In the chemical substance adsorbing building material 2 having the physical adsorption performance, the adsorption performance of the chemical substance adsorbing building material 2 can be restored by dissipating the physically adsorbed VOC by opening the window for ventilation. When the physically adsorbed VOC is completely dissipated, the adsorption performance of the chemical substance adsorbing building material 2 is reset to a new state.

[0075] The processing unit 31 calculates the cumulative dissipation amount from the start of opening the window for ventilation by the following formula (5).

[0076] Cumulative dissipation amount [μg / m 2 = (Detection value of the second sensor 28 [μg / m 3 - Detection value of the first sensor 27 [μg / m 3 ) × Ventilation rate of the housing 21 [m 3 / h] × Elapsed time from the start of opening the window for ventilation [h] ÷ Area of the opening 23 [m 2 ··· (5)

[0077] The ventilation rate in formula (5) is the ventilation rate of opening the window for ventilation.

[0078] First, in step SP31, the processing unit 31 acquires it by reading the setting information 41 from the storage unit 32.

[0079] Next, in step SP32, the processing unit 31 calculates the cumulative usage time of the chemical substance adsorbing building material 2 since the previous measurement.

[0080] Next, in step SP33, the processing unit 31 acquires the detection value of the first sensor 27.

[0081] Next, in step SP34, the processing unit 31 acquires the detection value of the second sensor 28.

[0082] Next, in step SP35, the processing unit 31 calculates the cumulative adsorption amount since the previous measurement by the above formula (4). Note that the processing unit 31 subtracts the ventilation volume conversion value of the cumulative desorption amount from the previous measurement to the current measurement from the cumulative adsorption amount since the previous measurement calculated by the above formula (4).

[0083] The processing unit 31 adds the cumulative adsorption amount since the previous measurement calculated for the current measurement to the database of the measurement information 42. Further, the processing unit 31 calculates the cumulative adsorption amount of the chemical substance adsorbing building material 2 since the previous reset by summing up the cumulative adsorption amount since the previous reset included in the database of the measurement information 42.

[0084] Next, in step SP36, the processing unit 31 calculates, as the performance deterioration degree of the chemical substance adsorbing building material 2, the ratio of the cumulative adsorption amount since the previous reset to the maximum adsorption amount of the chemical substance adsorbing building material 2.

[0085] Next, in step SP41, based on the time-series change of the performance deterioration degree of the chemical substance adsorbing building material 2, the processing unit 31 predicts the ventilation timing at which the window opening ventilation of the living room 1 should be performed as the date when the performance deterioration degree becomes equal to or higher than the threshold value Th1.

[0086] FIG. 14 is a diagram showing a prediction example of the ventilation timing of window ventilation. In the example shown in FIG. 14, window ventilation has not been performed at all since the previous reset, and the degree of performance deterioration of the chemical substance adsorbing building material 2 increases in proportion to the elapsed time. The processing unit 31 predicts the ventilation timing at which the window of the living room 1 should be opened for ventilation by specifying the date and time when the degree of performance deterioration becomes equal to or higher than the threshold value Th1.

[0087] FIG. 15 is a flowchart showing a second example of the processing executed by the processing unit 31 regarding the management of the adsorption performance of the chemical substance adsorbing building material 2 having the performance of physical adsorption.

[0088] The processing of steps SP31 to SP35 is the same as the first example shown in FIG. 13.

[0089] Next, in step SP51, the processing unit 31 calculates the ventilation volume conversion value of the adsorption performance value of the chemical substance adsorbing building material 2 by the following formula (6).

[0090] Ventilation volume conversion value [m 3 / (h·m 2 )] = {((Detection value of the first sensor 27 [μg / m 3 ÷Detection value of the second sensor 28 [μg / m 3 ) - 1}×Ventilation volume of the housing 21 [m 3 / h]÷Area of the opening 23 [m 2 ···(6)

[0091] The ventilation volume in formula (6) is the ventilation volume of 24-hour ventilation or the ventilation volume of window ventilation.

[0092] Next, in step SP42, the processing unit 31 predicts the ventilation timing at which the window of the living room 1 should be opened for ventilation as the date and time when the adsorption performance value becomes equal to or lower than the threshold value Th2 based on the time-series change of the adsorption performance value of the chemical substance adsorbing building material 2.

[0093] FIG. 16 is a diagram showing a prediction example of the ventilation timing of window ventilation. In the example shown in FIG. 16, window ventilation has not been performed at all since the previous reset, and the adsorption performance value of the chemical substance adsorbing building material 2 has decreased in proportion to the elapsed time. The processing unit 31 predicts the ventilation timing at which the window of the living room 1 should be opened by specifying the date when the adsorption performance value becomes equal to or less than the threshold value Th2.

[0094] When the chemical substance adsorbing building material 2 has both chemical adsorption and physical adsorption performances, the processing unit 31 may predict both the life of the chemical substance adsorbing building material 2 and the ventilation timing of the living room 1 based on the performance degradation degree (or adsorption performance value) of the chemical substance adsorbing building material 2.

[0095] FIG. 17 is a diagram showing a calculation example of the chemical adsorption amount and the physical adsorption amount regarding the chemical substance adsorbing building material 2. Time T0 indicates the previous reset timing, time T1 indicates the start timing of the current window ventilation, and time T2 indicates the current reset timing due to the current window ventilation.

[0096] The processing unit 31 calculates the chemical adsorption amount accumulated between times T0 and T2 as the accumulated adsorption amount (Q2 - Q1) obtained by subtracting the accumulated adsorption amount Q0 at time T0 from the accumulated adsorption amount Q2 at time T2. The difference between the accumulated adsorption amount Q2 and the accumulated adsorption amount Q1 corresponds to the accumulated desorption amount.

[0097] Further, the processing unit 31 calculates the physical adsorption amount accumulated between times T0 and T1 as the accumulated adsorption amount (Q1 - Q2) obtained by subtracting the accumulated adsorption amount Q2 at time T2 from the accumulated adsorption amount Q1 at time T1.

[0098] According to the present embodiment, the management device 10 is attached onto the surface of the chemical substance adsorbing building material 2 disposed in the living room 1 of the house where the user lives. The processing unit 31 provided in the management device 10 calculates the adsorption performance of the chemical substance adsorbing building material 2 based on the detection value of the first sensor 27 and the detection value of the second sensor 28. Therefore, the adsorption performance of the chemical substance adsorbing building material 2 disposed in the living room 1 can be managed by the management device 10 over a long period of time.

[0099] Further, according to the present embodiment, the effect of removing chemical substances in the air in the housing 21 by the chemical substance adsorbing building material 2 exposed from the opening 23 of the housing 21 can be set equal to the effect of removing chemical substances in the air in the living room 1 by the chemical substance adsorbing building material 2 arranged in the living room 1. As a result, the adsorption performance of the chemical substance adsorbing building material 2 arranged in the living room 1 can be accurately managed by the management device 10.

[0100] Further, according to the present embodiment, the ventilation rate of the air in the housing 21 can be set equal to the ventilation rate of the air in the living room 1. As a result, the adsorption performance of the chemical substance adsorbing building material 2 arranged in the living room 1 can be accurately managed by the management device 10.

[0101] Further, according to the present embodiment, the number of ventilation times of the air in the housing 21 per unit time can be accurately controlled by the air volume of the blower fan 26.

[0102] Further, according to the present embodiment, the number of ventilation times of the air in the living room 1 per unit time can be calculated simply and accurately.

[0103] Further, according to the present embodiment, the degree of performance deterioration of the chemical substance adsorbing building material 2 arranged in the living room 1 can be accurately calculated based on the cumulative adsorption amount and the maximum adsorption amount.

[0104] Further, according to the present embodiment, the life of the chemical substance adsorbing building material 2 by chemical adsorption arranged in the living room 1 can be accurately predicted based on the degree of performance deterioration.

[0105] Further, according to the present embodiment, the ventilation timing of the living room 1 in which the chemical substance adsorbing building material 2 by physical adsorption is arranged can be accurately predicted based on the degree of performance deterioration.

[0106] Further, according to the present embodiment, the life of the chemical substance adsorbing building material 2 arranged in the living room 1 can be accurately predicted based on the degree of performance deterioration, and the ventilation timing of the living room 1 can be accurately predicted based on the degree of performance deterioration.

[0107] Moreover, according to the present embodiment, the chemical adsorption amount and physical adsorption amount of chemical substances by the chemical substance adsorbing building material 2 can be calculated with high accuracy based on the cumulative adsorption amount and cumulative desorption amount.

Explanation of Signs

[0108] 1 Living room 2 Chemical substance adsorbing building material 3 Window 10 Management device 21 Housing 23 Opening 24 Air supply port 25 Exhaust port 26 Blower fan 27 First sensor 28 Second sensor 31 Processing unit 41 Setting information

Claims

1. A management device that is attached to the surface of a chemical substance adsorbing building material disposed in a living room of a house where a user lives, and manages the adsorption performance of the chemical substance adsorbing building material, a hollow housing having an opening formed therein through which a part of the surface of the chemical substance adsorbing building material is exposed; an air supply port formed in the housing for taking in air in the living room into the housing; an exhaust port formed in the housing for discharging air in the housing into the living room; a first sensor for detecting the concentration of a chemical substance in the air at the air supply port; a second sensor for detecting the concentration of a chemical substance in the air at the exhaust port; a processing unit that calculates the adsorption performance of the chemical substance adsorbing building material based on the detection value of the first sensor and the detection value of the second sensor; A management device comprising:

2. The ratio of the volume of the housing to the area of the opening is set equal to the ratio of the volume of the living room to the area of the chemical substance adsorbing building material, The management device according to claim 1.

3. The number of air exchanges per unit time in the housing is set equal to the number of air exchanges per unit time in the living room, The management device according to claim 1.

4. The management device further includes a blower fan that forms an air flow from the air supply port to the exhaust port in the housing, The processing unit sets the number of air exchanges per unit time in the housing by controlling the air volume of the blower fan. The management device according to claim 3.

5. The processing unit, detects the start and end of ventilation of the living room by opening the window based on a change in the detection value of the first sensor, calculates the number of air exchanges per unit time in the living room based on the detection value of the first sensor at the start of ventilation of the living room, the detection value of the first sensor after the start of opening the window, and the volume of the living room, The management device according to claim 3.

6. The processing unit, calculates the cumulative adsorption amount of the chemical substance by the chemical substance adsorbing building material based on the detection value of the first sensor, the detection value of the second sensor, the air exchange amount per unit time in the housing, and the area of the opening, calculates the performance degradation degree of the chemical substance adsorbing building material based on the cumulative adsorption amount and the maximum adsorption amount of the chemical substance by the chemical substance adsorbing building material, The management device according to claim 1.

7. The chemical substance adsorbing building material adsorbs the chemical substance by chemical adsorption, The processing unit predicts the lifespan of the chemical substance adsorbing building material based on the performance degradation degree. The management device according to claim 6.

8. The chemical substance adsorbing building material adsorbs the chemical substance by physical adsorption, Based on the degree of performance degradation, the processing unit predicts the ventilation timing of the living room. The management device according to claim 6.

9. The chemical substance adsorbing building material adsorbs the chemical substance by chemical adsorption and physical adsorption, Based on the degree of performance degradation, the processing unit predicts the lifespan of the chemical substance adsorbing building material and the ventilation timing of the living room. The management device according to claim 6.

10. The processing unit, detects the start of ventilation of the living room based on the change in the detection value of the first sensor, after the start of ventilation of the living room, based on the detection value of the first sensor, the detection value of the second sensor, the ventilation volume of the air in the housing per unit time, the area of the opening, and the elapsed time since the start of ventilation of the living room, calculates the cumulative emission amount of the chemical substance from the chemical substance adsorbing building material, calculates the chemical adsorption amount and physical adsorption amount of the chemical substance by the chemical substance adsorbing building material based on the cumulative adsorption amount and the cumulative emission amount. The management device according to claim 9.

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