Air purifier

Abstract

To provide a technology which enables improvement of a carbon dioxide concentration in a predetermined space.SOLUTION: Air is taken from a first space 10 into a space in a housing 100 through a first space inlet 110. Air in the space in the housing 100 is blown out into the first space 10 through a first space outlet 112. Air is taken from a second space 12 into the space in the housing 100 through a second space inlet 120. A first space blowout fan 130 is provided at the space in the housing 100 and blows out air from the space in the housing 100 into the first space 10. An opening / closing damper 150 opens or closes the second space inlet 120. A control unit controls the first space blowout fan 130 and the opening / closing damper 150 based on a carbon dioxide concentration in the first space 10 and a carbon dioxide concentration in the second space 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This disclosure relates to an air purifying device. [Background technology]

[0002] The air purifier comprises a filter unit for collecting dust and gases and a blower unit, all housed in a main case having an air intake and an air outlet. The blower unit blows air from outside the main case into the main case through the air intake. The air drawn into the main case passes through the filter unit and is blown out of the main case through the air outlet (for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-95011 [Overview of the project] [Problems that the invention aims to solve]

[0004] Air purifiers are installed in a designated space and improve the air quality of that space, such as air pollution and PM2.5. However, air purifiers cannot improve the carbon dioxide concentration in that space.

[0005] This disclosure is made to solve the above-mentioned problems and aims to provide a technology to improve the carbon dioxide concentration in a given space. [Means for solving the problem]

[0006] In order to solve the above problem, an air cleaning device according to an aspect of the present disclosure includes: a first space intake port for taking in air from a first space into an internal space of a housing; a first space outlet port for blowing out air from the internal space of the housing into the first space; a second space intake port for taking in air from a second space into the internal space of the housing; a first space outlet fan provided in the internal space of the housing for blowing air from the internal space of the housing into the first space; a first space cleaning unit that removes fine particles from air to be blown out into the first space; A first spatial circulation air passage guides air in the order of first spatial intake, internal space of the enclosure, and first spatial outlet, and a second spatial intake air passage guides air in the order of second spatial intake, internal space of the enclosure, and first spatial outlet, an opening / closing damper that opens and closes the second space intake port; the carbon dioxide concentration of the first space and the carbon dioxide concentration of the second space degree and a control unit that controls the first space outlet fan and the opening / closing damper based on the above. control The unit performs a first control operation in which, if the carbon dioxide concentration in the first space is equal to or greater than the carbon dioxide concentration in the second space, and the carbon dioxide concentration in the first space is equal to or greater than a predetermined threshold, it opens the opening / closing damper and operates the first space discharge fan to transport the air from the second space to the first space via the second space intake air passage, and also transports the air from the first space back to the first space via the first space circulation air passage.

[0007] It should be noted that any combination of the above constituent elements, and conversions of the expressions of the present disclosure between methods, devices, systems, recording media, computer programs, and the like are also effective as aspects of the present disclosure. [Effect of the Invention]

[0008] According to the present disclosure, the carbon dioxide concentration in a predetermined space can be improved. [Brief Description of Drawings]

[0009] [Figure 1] It is a diagram showing the configuration of the air cleaning device according to the present embodiment. [Figure 2] Figures 2(a) to 2(d) are diagrams showing the control of the air cleaning device of Figure 1. [Figure 3] It is a diagram summarizing the control of Figures 2(a) to 2(d). [Figure 4] It is a diagram showing the configuration of a control unit in the air cleaning device of Figure 1. [Figure 5] It is a flowchart showing a control procedure by the air cleaning device of Figure 1. [Mode for Carrying Out the Invention]

[0010] The embodiments described below all represent preferred specific examples of the present disclosure. Therefore, the numerical values, shapes, materials, components, arrangement and connection configurations of components, as well as the steps (processes) and their order shown in the following embodiments are examples and are not intended to limit the present disclosure. Accordingly, among the components in the following embodiments, those components that are not described in the independent claims representing the highest-level concepts of the present disclosure will be described as optional components. In addition, substantially identical components are denoted by the same reference numerals in each figure, and redundant explanations are omitted or simplified.

[0011] Figure 1 shows the configuration of the air purifier 1000. The air purifier 1000 includes a housing 100, a second space intake port 120, a second space outlet port 122, an intake duct 124, and an outlet duct 126. The housing 100 includes a first space intake port 110, a first space outlet port 112, a first space outlet fan 130, a first space cleaning unit 132, a second space outlet fan 140, a second space cleaning unit 142, and an opening / closing damper 150.

[0012] The first space 10 and the second space 12 are separate rooms (spaces) within a residence. For example, the first space 10 is a living room, and the second space 12 is a bedroom. The first space 10 and the second space 12 may be located in a facility other than a residence, such as an office building. The housing 100 of the air purifier 1000 is embedded in the ceiling of the first space 10. The bottom surface of the housing 100 is exposed to the first space 10, and the bottom surface is provided with a first space intake port 110 and a first space outlet port 112. The first space intake port 110 is an opening for taking air from the first space 10 into the space inside the housing 100. The first space outlet port 112 is an opening for blowing air from the space inside the housing 100 into the first space 10. The first space outlet port 112 may be formed by a plurality of rectifier plates for rectifying the air being blown out.

[0013] A second space intake 120 and a second space outlet 122 are installed in the ceiling of the second space 12. The second space intake 120 is connected to the housing 100 via an intake duct 124, and the second space outlet 122 is connected to the housing 100 via an outlet duct 126. The intake duct 124 and the outlet duct 126 are connected to one side of the housing 100, and on one side of the housing 100, the intake duct 124 is connected to the underside of the outlet duct 126. Furthermore, the side to which the intake duct 124 and the outlet duct 126 are connected is located closer to the first space intake 110 than to the first space outlet 112. In addition, the intake duct 124 and the outlet duct 126 are installed in the ceiling space so as to straddle the first space 10 and the second space 12. The second space intake port 120 is an opening for taking air from the second space 12 into the internal space of the housing 100. The second space outlet port 122 is an opening for blowing air from the internal space of the housing 100 into the second space 12. The second space outlet port 122 may be formed by a plurality of rectifier plates for rectifying the air being blown out, similar to the first space outlet port 112.

[0014] A first space air outlet fan 130 and a first space air purification unit 132 are provided in the internal space of the housing 100. For example, in the internal space of the housing 100, the first space air outlet fan 130 is positioned above the first space outlet 112, and the first space air purification unit 132 is positioned between the first space outlet 112 and the first space air outlet fan 130. The first space air outlet fan 130 consists of a DC (Direct Current) motor, a shaft extending from the DC motor, and a blade attached to the end of the shaft. In the first space air outlet fan 130, the blade rotates when the DC motor operates. By rotating the blade, the first space air outlet fan 130 draws air from outside the housing 100 into the internal space of the housing 100 and blows the air from the internal space of the housing 100 into the first space 10. The first space air outlet fan 130 may be a motor other than a DC motor, such as an AC (Alternating Current) motor. The first space purification unit 132 is, for example, a HEPA (High Efficiency Particulate Air) filter capable of capturing airborne particulate matter. These particulate matter includes, for example, PM2.5, pollen, and house dust. Therefore, the first space purification unit 132 removes particulate matter from the air that the first space discharge fan 130 is supposed to blow out into the first space 10 from the first space outlet 112.

[0015] A second space discharge fan 140 and a second space cleaning unit 142 are provided in the internal space of the housing 100. For example, in the internal space of the housing 100, the second space discharge fan 140 is positioned above the first space intake port 110, and the second space cleaning unit 142 is positioned between the second space discharge fan 140 and the discharge duct 126 (second space outlet port 122). The second space discharge fan 140 consists of an AC motor, a shaft extending from the AC motor, and a blade attached to the end of the shaft. In the second space discharge fan 140, the blade rotates when the AC motor operates. By rotating the blade, the second space discharge fan 140 draws air from outside the housing 100 into the internal space of the housing 100 and blows the air from the internal space of the housing 100 into the second space 12. The second space discharge fan 140 may be a motor other than an AC motor, such as a DC motor. The second space purification unit 142 is, for example, a HEPA filter capable of capturing airborne particles. Therefore, the second space purification unit 142 removes particles from the air that the second space discharge fan 140 is supposed to blow out into the second space 12 from the second space outlet 122.

[0016] Within the internal space of the housing 100, an opening / closing damper 150 is provided at the point where the intake duct 124 is connected to the housing 100. The opening / closing damper 150 has an openable / closable structure. The opening / closing damper 150 opens and closes the second space intake port 120.

[0017] The first spatial sensor 200 is installed in the first space 10 and measures the temperature, PM2.5 concentration, and carbon dioxide concentration of the first space 10. Known techniques are used to measure the temperature, PM2.5 concentration, and carbon dioxide concentration. The first spatial sensor 200 is equipped with communication functions such as wireless communication and transmits the measurement results to the air purifier 1000. The second spatial sensor 202 is installed in the second space 12 and measures the temperature, PM2.5 concentration, and carbon dioxide concentration of the second space 12. The second spatial sensor 202 is equipped with communication functions such as wireless communication and transmits the measurement results to the air purifier 1000. The first spatial sensor 200 does not necessarily have to measure the temperature and PM2.5 concentration of the first space 10, and the second spatial sensor 202 does not necessarily have to measure the temperature and PM2.5 concentration of the second space 12.

[0018] Figures 2(a)-(d) show the control of the air purifier 1000. Figure 3 is a diagram summarizing the control of the air purifier 1000. Figure 2(a) shows an overview of the first control. Here, the first space discharge fan 130 is operated, the second space discharge fan 140 is stopped, and the opening / closing damper 150 is opened. As a result, a first space circulation air passage 300 is formed that guides air in the order of the first space intake 110, the space inside the housing 100, the first space cleaning section 132, and the first space outlet 112, so that the air in the first space 10 is transported back to the first space 10 via the first space circulation air passage 300. Furthermore, a second space intake air passage 302 is formed that guides air in the following order: second space intake port 120, intake duct 124, internal space of housing 100, first space cleaning section 132, and first space outlet 112. As a result, air from the second space 12 is transported to the first space 10 via the second space intake air passage 302. This first control reduces the PM2.5 concentration and the CO2 concentration in the first space 10.

[0019] Figure 2(b) shows an overview of the second control. In this control, the first space outlet fan 130 is activated, the second space outlet fan 140 is stopped, and the opening / closing damper 150 is closed. As a result, the aforementioned first space circulation air passage 300 is formed, and the air from the first space 10 is transported back to the first space 10 via the first space circulation air passage 300. Here, even if the second space outlet fan 140 is not included in the housing 100, the operation is the same as stopping the second space outlet fan 140. This second control reduces the PM2.5 concentration in the first space 10.

[0020] Figure 2(c) shows an overview of the third control. Here, the first space discharge fan 130 and the second space discharge fan 140 are operated, and the opening / closing damper 150 is closed. As a result, the aforementioned first space circulation air passage 300 is formed, and the air from the first space 10 is transported back to the first space 10 via the first space circulation air passage 300. In addition, a first space intake air passage 304 is formed that guides the air in the order of first space intake port 110, the space inside the housing 100, the second space cleaning section 142, the discharge duct 126, and the second space outlet port 122, so that the air from the first space 10 is transported to the second space 12 via the first space intake air passage 304. Through this third control, the PM2.5 concentration in the first space 10 is reduced, and the CO2 concentration in the second space 12 is reduced.

[0021] Figure 2(d) shows an overview of the fourth control. Here, the first space discharge fan 130 and the second space discharge fan 140 are operated, and the opening / closing damper 150 is opened. As a result, the aforementioned first space circulation air passage 300 is formed, and the air from the first space 10 is transported back to the first space 10 via the first space circulation air passage 300. Also, as the aforementioned first space intake air passage 304 is formed, the air from the first space 10 is transported to the second space 12 via the first space intake air passage 304. Furthermore, as the second space circulation air passage 306 is formed, which guides the air in the following order: second space intake port 120, intake duct 124, space inside the housing 100, second space cleaning section 142, discharge duct 126, and second space outlet port 122, the air from the second space 12 is transported back to the second space 12 via the second space circulation air passage 306. This fourth control reduces the PM2.5 concentration in the first space 10 and the second space 12, and also reduces the CO2 concentration in the second space 12.

[0022] Figure 4 shows the configuration of the control unit 170 in the air purifier 1000. The control unit 170 is located, for example, inside the housing 100. The control unit 170 is connected to the communication unit 160 and the storage unit 190. The control unit 170 includes a carbon dioxide concentration acquisition unit 172, a particulate matter concentration acquisition unit 174, a temperature acquisition unit 176, a comparison unit 178, and an operation control unit 180. The communication unit 160 communicates with the first spatial sensor 200 and the second spatial sensor 202 shown in Figure 1. By communicating with the first spatial sensor 200, the communication unit 160 receives information on the temperature, PM2.5 (particulate matter) concentration, and carbon dioxide concentration of the first space 10. The communication unit 160 also receives information on the temperature, PM2.5 (particulate matter) concentration, and carbon dioxide concentration of the second space 12 by communicating with the second spatial sensor 202.

[0023] The carbon dioxide concentration acquisition unit 172 of the control unit 170 acquires the carbon dioxide concentration of the first space 10 and the carbon dioxide concentration of the second space 12 from the communication unit 160. The particulate matter concentration acquisition unit 174 acquires the PM2.5 concentration of the first space 10 and the PM2.5 concentration of the second space 12 from the communication unit 160. The temperature acquisition unit 176 acquires the temperature of the first space 10 and the temperature of the second space 12 from the communication unit 160.

[0024] The control unit 170 controls the first space outlet fan 130 and the on / off damper 150 based on the carbon dioxide concentration in the first space 10 and the carbon dioxide concentration in the second space 12. The control unit 170 also controls the first space outlet fan 130, the on / off damper 150, and the second space outlet fan 140 based on the carbon dioxide concentration in the first space 10, the carbon dioxide concentration in the second space 12, the PM2.5 concentration in the first space 10, and the PM2.5 concentration in the second space 12. Furthermore, the control unit 170 controls the first space outlet fan 130 and the on / off damper 150 based on the temperature in the first space 10 and the temperature in the second space 12. The processing of the control unit 170 will be explained below using Figure 5 as well.

[0025] FIG. 5 is a flowchart showing a control procedure performed by the air cleaning device 1000. In an initial state, the operation control unit 180 closes the opening / closing damper 150. The operation control unit 180 starts the operation of the first space blowing fan 130 (S10). The temperature acquisition unit 176 acquires the temperature T of the first space 10 A and the temperature T of the second space 12 B , the carbon dioxide concentration acquisition unit 172 acquires the carbon dioxide concentration CO2 of the first space 10 A and the carbon dioxide concentration CO2 of the second space 12 B , and the fine particle concentration acquisition unit 174 acquires the PM2.5 concentration PM2.5 of the first space 10 A and the PM2.5 concentration PM2.5 of the second space 12 B (S12).

[0026] The comparison unit 178 calculates the absolute value of the difference between T A and T B , and compares the absolute value of the difference with a predetermined temperature difference X stored in the storage unit 190. If the absolute value of the difference is smaller than X (Y in S14), the comparison unit 178 compares CO2 A with CO2 B . When CO2 A is not smaller than CO2 B (N in S16), the comparison unit 178 compares CO2 A with a threshold Z stored in the storage unit 190. Z is, for example, 1000 ppm. If CO2 A is equal to or higher than Z (Y in S18), the operation control unit 180 executes a first control (S22) by opening the opening / closing damper 150 (S20). If CO2 A is not equal to or higher than Z (N in S18), the operation control unit 180 executes a second control (S24).

[0027] When CO2 A is smaller than CO2 B (Y in S16), the comparison unit 178 compares CO2 B with a second space carbon dioxide threshold P stored in the storage unit 190, and compares CO2 AThis is compared with the first spatial carbon dioxide threshold Q stored in the memory unit 190. Here, P > Q, for example, P is 1000 ppm and Q is 500 ppm. CO2 B If P is greater than CO2 A If it is less than Q (Y in S26), the comparison unit 178 is PM2.5 A and PM2.5 B Compare with PM2.5. A PM2.5 B If it is not smaller (N in S28), the operation control unit 180 performs a third control (S32) by starting the operation of the second space discharge fan 140 (S30). B If it is not greater than P, or CO2 A If is not less than Q (N in S26), the operation control unit 180 executes the second control (S34).

[0028] PM2.5 A PM2.5 B If it is smaller (Y in S28), the comparison section 178 is PM2.5 B This is then compared with the second spatial particulate threshold R stored in the memory unit 190. PM2.5 B If R is greater than Y in S36, the operation control unit 180 performs a fourth control by starting operation of the second space discharge fan 140 (S38) and opening the on / off damper 150 (S40) (S42). PM2.5 B If the difference is not greater than R (N in S36), the operation control unit 180 performs the third control by starting the operation of the second space outlet fan 140 (S30) (S32). If the absolute value of the difference is not less than X (N in S14), the operation control unit 180 performs the second control (S34).

[0029] The subject of the apparatus, system, or method in this disclosure comprises a computer. The functions of the subject of the apparatus, system, or method in this disclosure are realized by the computer executing a program. The computer comprises a processor as its main hardware component, which operates according to the program. The processor is of any type as long as it can realize its functions by executing the program. The processor consists of one or more electronic circuits, including semiconductor integrated circuits (ICs) or LSIs (Large Scale Integrations). Multiple electronic circuits may be integrated on one chip or provided on multiple chips. Multiple chips may be aggregated in one device or provided on multiple devices. The program is recorded on a non-temporary recording medium such as a ROM, optical disc, or hard disk drive that is readable by the computer. The program may be pre-stored on the recording medium or supplied to the recording medium via a wide-area communication network, including the Internet.

[0030] According to this embodiment, the carbon dioxide concentration in the first space 10 can be improved by controlling the first space outlet fan 130 and the opening / closing damper 150 based on the carbon dioxide concentration in the first space 10 and the carbon dioxide concentration in the second space 12. Furthermore, if the carbon dioxide concentration in the first space 10 is equal to or greater than the carbon dioxide concentration in the second space 12, and the carbon dioxide concentration in the first space 10 is equal to or greater than a predetermined threshold, the first control is performed, thereby improving the particulate matter concentration and the carbon dioxide concentration in the first space 10. In this case, since the first control is performed if the carbon dioxide concentration in the first space 10 is equal to or greater than a predetermined threshold, the carbon dioxide concentration in the first space 10 can be improved efficiently. Furthermore, if the carbon dioxide concentration in the first space 10 is equal to or greater than the carbon dioxide concentration in the second space 12, and the carbon dioxide concentration in the first space 10 is less than a predetermined threshold, the second control is performed, thereby improving the particulate matter concentration in the first space 10.

[0031] Furthermore, the first space outlet fan 130, the on / off damper 150, and the second space outlet fan 140 are controlled based on the carbon dioxide concentration in the first space 10, the carbon dioxide concentration in the second space 12, the particulate matter concentration in the first space 10, and the particulate matter concentration in the second space 12, thereby improving the carbon dioxide concentration in the second space 12. Also, if the carbon dioxide concentration in the first space 10 is less than the carbon dioxide concentration in the second space 12, and the particulate matter concentration in the first space 10 is equal to or greater than the particulate matter concentration in the second space 12, a third control is performed, thereby improving the particulate matter concentration in the first space 10 and improving the carbon dioxide concentration in the second space 12.

[0032] Furthermore, if the carbon dioxide concentration in the first space 10 is less than the carbon dioxide concentration in the second space 12, the particulate matter concentration in the first space 10 is equal to or greater than the particulate matter concentration in the second space 12, the carbon dioxide concentration in the second space 12 is greater than the carbon dioxide threshold for the second space, and the carbon dioxide concentration in the first space 10 is less than the carbon dioxide threshold for the first space, then the third control is performed, thereby improving the particulate matter concentration in the first space 10 and improving the carbon dioxide concentration in the second space 12. In this case, if the carbon dioxide concentration in the second space 12 is greater than the carbon dioxide threshold for the second space, and the carbon dioxide concentration in the first space 10 is less than the carbon dioxide threshold for the first space, then the third control is performed, thereby efficiently improving the carbon dioxide concentration in the second space 12. Also, if the carbon dioxide concentration in the second space 12 is less than the carbon dioxide threshold for the second space, or if the carbon dioxide concentration in the first space 10 is equal to or greater than the carbon dioxide threshold for the first space, then the second control is performed, thereby improving the particulate matter concentration in the first space 10.

[0033] Furthermore, if the carbon dioxide concentration in the first space 10 is less than the carbon dioxide concentration in the second space 12, and the particulate matter concentration in the first space 10 is less than the particulate matter concentration in the second space 12, the fourth control is performed, thereby improving the particulate matter concentrations in both the first space 10 and the second space 12, as well as improving the carbon dioxide concentration in the second space 12. Also, if the carbon dioxide concentration in the first space 10 is less than the carbon dioxide concentration in the second space 12, and the particulate matter concentration in the first space 10 is less than the particulate matter concentration in the second space 12, and the particulate matter concentration in the second space 12 is greater than the second space particulate matter threshold, the fourth control is performed, thereby improving the particulate matter concentrations in both the first space 10 and the second space 12, as well as improving the carbon dioxide concentration in the second space 12. In this case, if the particulate matter concentration in the second space 12 is greater than the second space particulate matter threshold, the fourth control is performed, so the particulate matter concentration in the second space 12 can be efficiently improved. Furthermore, if the particulate matter concentration in the second space 12 is below the second space particulate matter threshold, the third control is performed, thereby improving the particulate matter concentration in the first space 10 and improving the carbon dioxide concentration in the second space 12.

[0034] Furthermore, if the temperature difference between the first space 10 and the second space 12 is greater than or equal to a predetermined temperature difference, the opening / closing damper 150 is closed, preventing air from the second space 12 from blowing into the first space 10. In addition, the absolute value of the temperature difference between the first space 10 and the second space 12 is calculated, and if the absolute value of the difference is greater than or equal to the temperature difference, the second control is executed. If the absolute value of the difference is greater than or equal to the temperature difference, it is possible that one of the air in the first space 10 or the air in the second space 12 is temperature-controlled by cooling or heating, while the other is not. If a control other than the second control is performed in such a state, the temperature of the space that is temperature-controlled to a comfortable temperature for the user may change to a temperature that is uncomfortable for the user. In other words, by calculating the absolute value of the temperature difference between the first space 10 and the second space 12, and executing the second control if the absolute value of the difference is greater than or equal to the temperature difference X, a decrease in user comfort can be suppressed.

[0035] An outline of one aspect of the present disclosure is as follows: An air purifier (1000) in one aspect of the present disclosure includes a first space intake port (110) for taking in air from a first space (10) into the space inside the housing (100), a first space outlet port (112) for blowing air from the space inside the housing (100) into the first space (10), a second space intake port (120) for taking in air from a second space (12) into the space inside the housing (100), and a device provided in the space inside the housing (100) that takes in air from the space inside the housing (100) The system includes a first space discharge fan (130) that blows air into a first space (10), a first space cleaning unit (132) that removes fine particles from the air to be blown into the first space (10), an opening / closing damper (150) that opens and closes a second space intake port (120), and a control unit (170) that controls the first space discharge fan (130) and the opening / closing damper (150) based on the carbon dioxide concentration in the first space (10) and the carbon dioxide concentration in the second space (12).

[0036] The system may further include a first spatial circulation air passage (300) that guides air in the order of a first spatial intake (110), the internal space of the housing (100), and a first spatial outlet (112), and a second spatial intake air passage (302) that guides air in the order of a second spatial intake (120), the internal space of the housing (100), and a first spatial outlet (112). The control unit (170) performs a first control operation in which, if the carbon dioxide concentration in the first space (10) is equal to or greater than the carbon dioxide concentration in the second space (12), and the carbon dioxide concentration in the first space (10) is equal to or greater than a predetermined threshold, it opens the opening / closing damper (150) and operates the first space discharge fan (130) to transport the air from the second space (12) to the first space (10) via the second space intake air passage (302), and then transports the air from the first space (10) back to the first space (10) via the first space circulation air passage (300).

[0037] The control unit (170) performs a second control in which, if the carbon dioxide concentration in the first space (10) is equal to or greater than the carbon dioxide concentration in the second space (12), and the carbon dioxide concentration in the first space (10) is less than a predetermined threshold, it closes the opening / closing damper (150) and operates the first space blowing fan (130), thereby transporting the air from the first space (10) back to the first space (10) via the first space circulation air passage (300) without transporting the air from the second space (12) to the first space (10).

[0038] The system may further include a second space outlet (122) for blowing air from the internal space of the housing (100) into the second space (12), a second space blowing fan (140) provided in the internal space of the housing (100) for blowing air from the internal space of the housing (100) into the second space (12), and a second space cleaning unit (142) for removing fine particles from the air to be blown into the second space (12). The control unit (170) may control the first space blowing fan (130), the opening / closing damper (150), and the second space blowing fan (140) based on the carbon dioxide concentration in the first space (10), the carbon dioxide concentration in the second space (12), the fine particle concentration in the first space (10), and the fine particle concentration in the second space (12).

[0039] The system may further include a first space circulation air passage (300) that guides air in the order of a first space intake (110), the space inside the housing (100), and a first space outlet (112), and a first space intake air passage (304) that guides air in the order of a first space intake (110), the space inside the housing (100), and a second space outlet (122). The control unit (170) performs a third control operation in which, if the carbon dioxide concentration in the first space (10) is less than the carbon dioxide concentration in the second space (12), and the particulate matter concentration in the first space (10) is equal to or greater than the particulate matter concentration in the second space (12), it closes the opening / closing damper (150) and operates the first space discharge fan (130) and the second space discharge fan (140) to transport the air from the first space (10) to the second space (12) via the first space intake air passage (304), and then transports the air from the first space (10) back to the first space (10) via the first space circulation air passage (300).

[0040] The control unit (170) performs a third control if the carbon dioxide concentration in the second space (12) is greater than the second space carbon dioxide threshold, and the carbon dioxide concentration in the first space (10) is less than the first space carbon dioxide threshold, which is less than the second space carbon dioxide threshold. If the carbon dioxide concentration in the second space (12) is less than the second space carbon dioxide threshold, or if the carbon dioxide concentration in the first space (10) is greater than or equal to the first space carbon dioxide threshold, the control unit (170) performs a second control by closing the opening / closing damper (150), operating the first space discharge fan (130), and stopping the second space discharge fan (140), thereby transporting the air from the first space (10) back to the first space (10) via the first space circulation air passage (300) without transporting the air from the second space (12) to the first space (10).

[0041] The system may further include a first spatial circulation air passage (300) that guides air in the order of a first spatial intake (110), the internal space of the housing (100), and a first spatial outlet (112); a second spatial circulation air passage (306) that guides air in the order of a second spatial intake (120), the internal space of the housing (100), and a second spatial outlet (122); and a first spatial intake air passage (304) that guides air in the order of a first spatial intake (110), the internal space of the housing (100), and a second spatial outlet (122). The control unit (170) performs a fourth control operation in which, if the carbon dioxide concentration in the first space (10) is less than the carbon dioxide concentration in the second space (12), and the particulate matter concentration in the first space (10) is less than the particulate matter concentration in the second space (12), it opens the opening / closing damper (150) and operates the first space outlet fan (130) and the second space outlet fan (140) to transport the air from the first space (10) to the second space (12) via the first space intake air passage (304), transports the air from the second space (12) back to the second space (12) via the second space circulation air passage (306), and transports the air from the first space (10) back to the first space (10) via the first space circulation air passage (300).

[0042] The control unit (170) performs a fourth control if the particulate matter concentration in the second space (12) is greater than the second space particulate matter threshold, and if the particulate matter concentration in the second space (12) is less than the second space particulate matter threshold, it closes the opening / closing damper (150) and operates the first space discharge fan (130) and the second space discharge fan (140) to transport the air from the first space (10) to the second space (12) via the first space intake air passage (304), and then performs a third control to transport the air from the first space (10) back to the first space (10) via the first space circulation air passage (300).

[0043] The system may further include a first space circulation air passage (300) that guides air in the order of a first space intake (110), the space inside the housing (100), and a first space outlet (112). The control unit (170) controls the first space discharge fan (130) and the on / off damper (150) based on the temperature of the first space (10) and the temperature of the second space (12). If the temperature difference between the first space (10) and the second space (12) is greater than or equal to a predetermined temperature difference, the control unit (170) closes the on / off damper (150) and operates the first space discharge fan (130), thereby performing a second control that transports the air from the first space (10) back to the first space (10) via the first space circulation air passage (300) without transporting the air from the second space (12) to the first space (10).

[0044] The control unit (170) may also include a carbon dioxide concentration acquisition unit (172) that acquires the carbon dioxide concentration in the first space (10) and the carbon dioxide concentration in the second space (12).

[0045] The control unit (170) may also include a particulate concentration acquisition unit (174) that acquires the particulate concentration of the first space (10) and the particulate concentration of the second space (12).

[0046] The present disclosure has been described above based on examples. These examples are illustrative, and it will be understood by those skilled in the art that various modifications are possible for each component or combination of processing steps, and that such modifications are also within the scope of the present disclosure.

[0047] For example, the housing 100 of the air purifier 1000 may be embedded in the ceiling of the second space 12. In this case, the bottom surface of the housing 100 is exposed to the second space 12, and a second space intake port 120 and a second space outlet port 122 are provided on the bottom surface. A first space intake port 110 and a first space outlet port 112 are installed in the ceiling of the first space 10. The first space intake port 110 is connected to the housing 100 via a duct, and the first space outlet port 112 is also connected to the housing 100 via a duct separate from the duct connected to the first space intake port 110. The second space intake port 120 is an opening for taking air from the second space 12 into the space inside the housing 100. The second space outlet port 122 is an opening for blowing air from the space inside the housing 100 into the second space 12.

[0048] Furthermore, the second space outlet 122 (and outlet duct 126), the second space outlet fan 140, and the second space cleaning unit 142 do not need to be provided. In this case, the control unit 170 does not need to include the particulate matter concentration acquisition unit 174. The control unit 170 may perform first control and second control based on the carbon dioxide concentration in the first space 10 and the carbon dioxide concentration in the second space 12. This allows for a simpler configuration and control content.

[0049] Furthermore, the control unit 170 does not necessarily need to include the temperature acquisition unit 176. This allows for a simpler configuration and control system. [Explanation of symbols]

[0050] 10 First space, 12 Second space, 100 Housing, 110 First space intake, 112 First space outlet, 120 Second space intake, 122 Second space outlet, 124 Intake duct, 126 Outlet duct, 130 First space outlet fan, 132 First space cleaning unit, 140 Second space outlet fan, 142 Second space cleaning unit, 150 Opening / closing damper, 160 Communication unit, 170 Control unit, 172 Carbon dioxide concentration acquisition unit, 174 Particulate matter concentration acquisition unit, 176 Temperature acquisition unit, 178 Comparison unit, 180 Operation control unit, 190 Memory unit, 200 First space sensor, 202 Second space sensor, 300 First space circulation air passage, 302 Second space intake air passage, 304 First air intake passage, 306 Second air circulation passage, 1000 Air purifier.

Claims

1. A first space intake port for drawing air from the first space into the space inside the enclosure, A first space outlet for blowing air from the internal space of the housing into the first space, A second space intake port for taking in air from the second space into the space inside the housing, A first space discharge fan is provided in the internal space of the housing and blows air from the internal space of the housing into the first space, A first space purification unit that removes fine particles from the air to be blown into the first space, A first spatial circulation air passage guides air in the order of the first spatial intake, the internal space of the housing, and the first spatial outlet, A second space intake air passage guides air in the order of the second space intake port, the space inside the housing, and the first space outlet, An opening / closing damper for opening and closing the second space intake, A control unit controls the first space outlet fan and the opening / closing damper based on the carbon dioxide concentration in the first space and the carbon dioxide concentration in the second space, Equipped with, The control unit, If the carbon dioxide concentration in the first space is equal to or greater than the carbon dioxide concentration in the second space, and the carbon dioxide concentration in the first space is equal to or greater than a predetermined threshold, An air purifier that performs a first control by opening the opening / closing damper and operating the first space blowing fan, thereby transporting air from the second space to the first space via the second space intake air passage, and transporting air from the first space back to the first space via the first space circulation air passage.

2. The control unit, If the carbon dioxide concentration in the first space is equal to or greater than the carbon dioxide concentration in the second space, and the carbon dioxide concentration in the first space is less than the predetermined threshold, The air purifying device according to claim 1, wherein a second control is performed by closing the opening / closing damper and operating the first space blowing fan, thereby transporting the air from the first space back to the first space via the first space circulation air passage without transporting the air from the second space back to the first space.

3. A first space intake port for taking in air from the first space into the space inside the housing, A first space outlet for blowing air from the internal space of the housing into the first space, A second space intake port for taking in air from the second space into the space inside the housing, A second space outlet for blowing air from the internal space of the housing into the second space, A first space discharge fan is provided in the internal space of the housing and blows air from the internal space of the housing into the first space, A second space discharge fan is provided in the internal space of the housing and blows air from the internal space of the housing into the second space, A first space purification unit that removes fine particles from the air to be blown into the first space, A second space cleaning unit that removes the fine particles from the air to be blown into the second space, An opening / closing damper for opening and closing the second space intake, A first spatial circulation air passage guides air in the order of the first spatial intake, the internal space of the housing, and the first spatial outlet, A first space intake air passage guides air in the order of the first space intake port, the space inside the housing, and the second space outlet, A control unit controls the first space outlet fan, the opening / closing damper, and the second space outlet fan based on the carbon dioxide concentration in the first space, the carbon dioxide concentration in the second space, the particulate matter concentration in the first space, and the particulate matter concentration in the second space. Equipped with, The control unit, If the carbon dioxide concentration in the first space is less than the carbon dioxide concentration in the second space, and the particulate matter concentration in the first space is equal to or greater than the particulate matter concentration in the second space, An air purifier that performs a third control by closing the opening / closing damper and operating the first space discharge fan and the second space discharge fan, thereby transporting the air from the first space to the second space via the first space intake air passage, and then transporting the air from the first space back to the first space via the first space circulation air passage.

4. The control unit, If the carbon dioxide concentration in the second space is greater than the carbon dioxide threshold in the second space, and the carbon dioxide concentration in the first space is less than the carbon dioxide threshold in the first space (i.e., less than the carbon dioxide threshold in the second space), Perform the third control described above, If the carbon dioxide concentration in the second space is less than the carbon dioxide threshold for the second space, or if the carbon dioxide concentration in the first space is equal to or greater than the carbon dioxide threshold for the first space, The air purifying device according to claim 3, wherein a second control is performed to transport the air from the first space back to the first space via the first space circulation air passage without transporting the air from the second space back to the first space, by closing the opening / closing damper, operating the first space blowing fan, and stopping the second space blowing fan.

5. A first space intake port for taking in air from the first space into the space inside the housing, A first space outlet for blowing air from the internal space of the housing into the first space, A second space intake port for taking in air from the second space into the space inside the housing, A second space outlet for blowing air from the internal space of the housing into the second space, A first space discharge fan is provided in the internal space of the housing and blows air from the internal space of the housing into the first space, A second space discharge fan is provided in the internal space of the housing and blows air from the internal space of the housing into the second space, A first space purification unit that removes fine particles from the air to be blown into the first space, A second space cleaning unit that removes the fine particles from the air to be blown into the second space, An opening / closing damper for opening and closing the second space intake, A first spatial circulation air passage guides air in the order of the first spatial intake, the internal space of the housing, and the first spatial outlet, A second spatial circulation air passage guides air in the order of the second spatial intake port, the internal space of the housing, and the second spatial outlet, A first space intake air passage guides air in the order of the first space intake port, the space inside the housing, and the second space outlet, A control unit controls the first space outlet fan, the opening / closing damper, and the second space outlet fan based on the carbon dioxide concentration in the first space, the carbon dioxide concentration in the second space, the particulate matter concentration in the first space, and the particulate matter concentration in the second space. Equipped with, The control unit, If the carbon dioxide concentration in the first space is less than the carbon dioxide concentration in the second space, and the particulate matter concentration in the first space is less than the particulate matter concentration in the second space, An air purifying device that performs a fourth control by opening the opening / closing damper and operating the first space discharge fan and the second space discharge fan, thereby transporting the air from the first space to the second space via the first space intake air passage, transporting the air from the second space back to the second space via the second space circulation air passage, and transporting the air from the first space back to the first space via the first space circulation air passage.

6. The control unit, If the particle concentration in the second space is greater than the particle threshold in the second space, Perform the fourth control described above, If the particle concentration in the second space is less than the particle threshold in the second space, The air purifying device according to claim 5, wherein a third control is performed by closing the opening / closing damper and operating the first space discharge fan and the second space discharge fan to transport the air from the first space to the second space via the first space intake air passage, and then transporting the air from the first space back to the first space via the first space circulation air passage.

7. The control unit, The air purifier according to any one of claims 1, 3, or 5, further comprising a carbon dioxide concentration acquisition unit that acquires the carbon dioxide concentration in the first space and the carbon dioxide concentration in the second space.

8. The control unit, The air purifier according to claim 3 or 5, further comprising a particulate concentration acquisition unit for acquiring the particulate concentration of the first space and the particulate concentration of the second space.

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