Diffuser and diffuser control method

Abstract

The present invention relates to the structure of a diffuser provided in each of a plurality of indoor spaces, and a control method therefor. The diffuser presented in the present invention measures indoor air pollution levels through carbon dioxide, ultrafine dust and human body sensors provided therein and then, if a person enters, begins air purification, and thus can use energy efficiently.

Description

Diffuser and diffuser control method

[0001] The present invention relates to a diffuser installed in each of a plurality of rooms to purify and ventilate the internal air, and to a method for controlling the diffuser. The system comprises: a room in which an occupant is located; a check is made to determine whether the air pollution level of the room exceeds a standard pollution level; an artificial intelligence machine learning is used to predict the residence time of the occupant; and a diffuser system automatically provides a ventilation air volume that can make the air in the room comfortable and below the standard pollution level within the residence time, thereby improving energy efficiency and increasing the satisfaction of the occupant.

[0002]

[0003] A diffuser is a device that is installed indoors as a pair of supply and exhaust diffusers to ventilate indoor air.

[0004] Recently, the damage caused by indoor air pollution, such as respiratory diseases caused by fine dust, and group infections caused by airborne pathogens such as coronavirus and influenza, has been gradually increasing worldwide, and interest in indoor air purification and ventilation using diffusers is increasing.

[0005] Recently, a system has been introduced in which a sensor is attached to a diffuser to measure the concentration of ultrafine dust (PM2.5) with a particle size of 2.5 μm or less and the concentration of carbon dioxide (CO2), and if the measured concentration of ultrafine dust and carbon dioxide exceeds the standard, ventilation is activated.

[0006] And some diffuser systems are equipped with a human detection sensor that operates the diffuser system only when there is someone in the room, thus reducing energy waste.

[0007] That is, in the case of existing diffuser system control, as described above, most of the time the operation of the diffuser system is controlled only by checking whether the concentration of ultrafine dust and carbon dioxide exceeds the standard and whether there are people in the room.

[0008] Additionally, in the case of existing diffuser systems, sensors measuring ultrafine dust and carbon dioxide are attached to the bottom of the diffuser to expose it to the outside air as much as possible.

[0009] However, this standard diffuser system has the following disadvantages:

[0010] First, ultrafine dust and carbon dioxide in the air are heavier than air, so if there are no people inside the room for a long time, the above pollutants will accumulate on the floor.

[0011] Therefore, if the concentration of ultrafine dust and carbon dioxide is measured with an ultrafine dust sensor and a carbon dioxide sensor immediately when a person enters a room, there is a very high possibility that the air pollution level in the space where people actually live will be measured lower.

[0012] In addition, the ultrafine dust sensor and carbon dioxide sensor are exposed to the outside, which is not only unsightly, but also the wires that supply power to the sensors become tangled along with the rotation of the diffuser inlet, which can cause frequent malfunctions such as short circuits.

[0013] Second, by operating a diffuser control system that relies solely on the presence of occupants and the measurement results of carbon dioxide and ultrafine dust sensors without considering the air volume supplied and exhausted through the diffuser, ventilation may not be fully completed during the occupant's time.

[0014] Third, if the outdoor concentration of fine dust or carbon dioxide is higher than that of the indoor air due to seasonal factors such as yellow dust or nearby pollutants, even if the indoor air pollution level is higher than the standard, there is no function to stop ventilation, so the indoor pollution level may actually be aggravated by ventilation.

[0015] Therefore, a diffuser and its control system are essential to ensure occupant comfort while efficiently managing the energy consumed for indoor ventilation, taking into account factors such as occupant time, indoor air pollution levels, the number of rooms requiring ventilation, and outdoor air pollution levels.

[0016]

[0017] The present invention has been devised to solve the above-described problem, and its purpose is to provide a diffuser capable of controlling the air volume (CMH, Cubic Meter Hour) of a diffuser system installed in each of a plurality of rooms in a building, and a method for controlling the same.

[0018] The purpose is to install a carbon dioxide sensor and an ultrafine dust sensor inside a diffuser to sense indoor air mixed through ventilation and obtain measurement values ​​that can represent the level of air pollution in the room.

[0019] The purpose of this invention is to provide a control method that can forcibly terminate ventilation even if the indoor ultrafine dust or carbon dioxide concentration is higher than the standard concentration when the outdoor ultrafine dust or carbon dioxide concentration is higher than the indoor concentration.

[0020] The goal is to provide differential ventilation so that all ventilation can be completed while the occupants are in the room by predicting the occupant's residence time through artificial intelligence machine learning.

[0021] To this end, the purpose is to improve the overall energy efficiency within the building by allowing the opening of the exhaust and supply diffusers to be adjusted according to the usage environment.

[0022] The purpose is to minimize damage to occupants due to sensor malfunction by installing human body detection sensors in both the exhaust and supply diffusers and selecting the larger measurement result when the measurement results differ.

[0023] The purpose is to prevent damage due to frequent use by installing a cushioning material at the contact point between the diffuser cone and the diffuser body.

[0024] The purpose is to improve maintainability by fixing all sensors installed in the diffuser cone with elastic clips so that they can be easily removed and then installed in the installation groove.

[0025] The diffuser system and its control method presented according to the technical idea of ​​the present invention are not limited to the tasks mentioned in the above description, and other tasks can be clearly understood by those skilled in the art from the description below.

[0026]

[0027] In order to solve the above-described problem, the present invention comprises an exhaust diffuser (1) for ventilating indoor air, the exhaust diffuser (1) comprising: a main body (10) having an upper opening (12) connected to an exhaust fan (2200) at the upper end and a lower opening (11) formed at the lower end for sucking indoor air; an attachment part (20) located at the center inside the main body (10) and having an ultrafine dust sensor (50) and a carbon dioxide sensor (70) fixed thereto; a motor (60) fixed inside the attachment part (20); and a rack gear part (30) that is raised and lowered by the rotation of the motor (60), one end of which penetrates the upper end of the attachment part (20) and the other end of which is connected to a diffuser cone (40) on which a human body detection sensor (80) is installed; The above diffuser cone (40) may be characterized in that it moves up and down by the rotation of the motor (60), and adjusts the opening amount of the lower opening (11) by opening and closing the lower opening (11).

[0028] In one embodiment of the present invention, the ultrafine dust sensor (50), the carbon dioxide sensor (70), and the human body detection sensor (80) are inserted into the first installation groove (23), the second installation groove (24) formed in the attachment portion (20), and the third installation groove (42) installed at the bottom of the diffuser cone (40), respectively, and the ultrafine dust sensor (50), the carbon dioxide sensor (70), and the human body detection sensor (80) may be characterized in that they are fixed by elastic clips (25) installed in the first installation groove (23) to the third installation groove (25), respectively.

[0029] In one embodiment of the present invention, a plurality of fixing parts (21) are arranged at the bottom of the attachment part (20), and a fixing clip (211) that is fixed to the bottom of the main body (10) is formed at the end of the fixing part (21).

[0030] In one embodiment of the present invention, it may be characterized in that a first display unit (14) that indicates the indoor ultrafine dust concentration in color and a second display unit (15) that indicates the indoor carbon dioxide concentration in color are installed on one side of the lower portion of the main body (10).

[0031] In one embodiment of the present invention, it may be characterized in that a leak-preventing rubber (13) is installed at a predetermined interval along the lower opening (11) at the lower end of the main body (10), and a leak-preventing end (41) is formed on the outer surface of the diffuser cone (40) to contact the leak-preventing rubber (13) and seal the lower opening (11).

[0032] In one embodiment of the present invention, in the air supply diffuser (2) for ventilating indoor air,

[0033] The above air supply diffuser (2) comprises a main body (100) having an upper opening (120) connected to an air supply fan (2100) at the upper end and a lower opening (110) for supplying air to a room at the lower end; an attachment part (200) located at the center inside the main body (100) and to which an ultrafine dust sensor (500) and a carbon dioxide sensor (700) are fixed; a motor (600) fixed inside the attachment part (200); a rack gear part (300) that is raised and lowered by the rotation of the motor (600) and has one end penetrating the upper end of the attachment part (200) and the other end connected to a diffuser cone (400) having a human body detection sensor (800) installed on one side; a pleated filter (920) formed along the lower opening (110) of the main body (100) and the outer circumference of the diffuser cone (400); The above diffuser cone (400) may be characterized in that it moves up and down by the rotation of the motor (600), and adjusts the opening amount of the lower opening (110) by opening and closing the lower opening (110).

[0034] In one embodiment of the present invention, the ultrafine dust sensor (500), the carbon dioxide sensor (700), and the human body detection sensor (800) are inserted into the first installation groove (230), the second installation groove (240) formed in the attachment portion (200), and the third installation groove (420) installed at the bottom of the diffuser cone (400), respectively, and the ultrafine dust sensor (500), the carbon dioxide sensor (700), and the human body detection sensor (800) may be characterized in that they are fixed by elastic clips (25) installed in the first installation groove (230) to the third installation groove (250), respectively.

[0035] In one embodiment of the present invention, a plurality of fixing parts (21) are arranged at the bottom of the attachment part (200), and a fixing clip (211) fixed to the bottom of the main body (100) is formed at the end of the fixing part (21).

[0036] In one embodiment of the present invention, it may be characterized in that a first display unit (140) that indicates the indoor ultrafine dust concentration in color and a second display unit (150) that indicates the indoor carbon dioxide concentration in color are installed on one side of the lower portion of the main body (100).

[0037] In one embodiment of the present invention, it may be characterized in that a leak-preventing rubber (133) is installed at a predetermined interval along the lower opening (110) at the lower end of the main body (100), and a leak-preventing end (410) is formed on the outer surface of the diffuser cone (400) to contact the leak-preventing rubber (130) and seal the lower opening (110).

[0038] In one embodiment of the present invention, a method for controlling the operation of an exhaust diffuser (1) and a supply air diffuser (2) installed in a plurality of rooms by a control unit (1000) comprises: a first step of setting an ultrafine dust concentration standard and a carbon dioxide concentration standard in the control unit (1000); a second step of specifying a room in which occupants are present and the number of occupants from human body detection sensors (80, 800) installed in the exhaust diffuser (1) and the supply air diffuser (2), respectively; a third step of measuring the ultrafine dust and carbon dioxide concentrations in the room in which occupants are present using an ultrafine dust sensor (50) and a carbon dioxide sensor (70) installed in the exhaust diffuser (1), respectively, and measuring the external ultrafine dust and carbon dioxide concentrations using an ultrafine dust sensor (500) and a carbon dioxide sensor (700) installed in the supply air diffuser (2), respectively; A fourth step of specifying an indoor space in which the ultrafine dust or carbon dioxide concentration is higher than the ultrafine dust and carbon dioxide concentration standards among the outdoor measurement results as an indoor space requiring ventilation; a fifth step of calculating the required air supply and exhaust air volume to make the ultrafine dust and carbon dioxide concentration in the indoor space requiring ventilation lower than the ultrafine dust and carbon dioxide concentration standards; a sixth step of determining the exhaust air volume of an exhaust diffuser (1) and the supply air volume of a supply air diffuser (2) installed in the indoor space requiring ventilation; a seventh step of driving an exhaust fan (2200) and a supply air fan (2100) installed outdoors; an eighth step of calculating the opening amounts of the exhaust diffuser (1) and the supply air diffuser (2) in the indoor space requiring ventilation; a ninth step of adjusting the opening amounts of the exhaust diffuser (1) and the supply air diffuser (2) in the indoor space requiring ventilation and ventilating the room; It may be characterized by including a 10th step of re-measuring the concentration of ultrafine dust and carbon dioxide in the room requiring ventilation using the ultrafine dust sensor (50) and the carbon dioxide sensor (70); and an 11th step of setting the opening amount of the exhaust diffuser (1) and the supply air diffuser (2) in the room requiring ventilation to '0' if the re-measurement results show that the concentration of ultrafine dust and carbon dioxide in the room requiring ventilation are respectively below the concentration standards for ultrafine dust and carbon dioxide.

[0039] In one embodiment of the present invention, the control unit (1000) includes a communication unit (1100) that receives measurement information of an ultrafine dust sensor (50), a carbon dioxide sensor (70), and a human body detection sensor (80, 800) in each room;

[0040] It can be characterized by comprising: a learning storage unit (1300) that stores ultrafine dust and carbon dioxide concentration standards and predicts the expected residence time and expected carbon dioxide generation amount of each indoor occupant by machine learning the residence time of each indoor occupant and the carbon dioxide generation amount information of the occupant from the measurement information of the human body detection sensor (80) received by the communication unit (1100); and a calculation unit (1200) that specifies the indoor occupant from the human body detection sensor (80, 800) and calculates the required air supply amount and the required exhaust amount to adjust the ultrafine dust and carbon dioxide concentration standard or lower when the ultrafine dust or carbon dioxide concentration of the indoor is higher than the ultrafine dust and carbon dioxide concentration standard.

[0041] In one embodiment of the present invention, the required air supply amount and the required exhaust amount may be calculated through a step of setting the required air supply amount and the required exhaust amount to be the same by the calculation unit (1200); a step of calculating the air supply amount and the exhaust amount required to lower the concentration of ultrafine dust and carbon dioxide in the room requiring ventilation to below the ultrafine dust and carbon dioxide concentration standards when there is no occupant in the room requiring ventilation; and a step of calculating the required air supply amount and the required exhaust amount by adding the expected carbon dioxide generation amount of the occupant in the room to each of the air supply amount and the exhaust amount.

[0042] In one embodiment of the present invention, the opening amounts of the exhaust diffuser (1) and the supply air diffuser (2) are calculated by the calculation unit (1200) in the steps of: calculating the maximum exhaust and supply air volumes that can be produced by driving the supply air fan (210) and the exhaust fan (220); obtaining the practical exhaust and supply air volumes by multiplying the maximum exhaust and supply air volumes by an external static pressure ratio; obtaining the first air volume by dividing the practical exhaust and supply air volumes by the total number of rooms requiring ventilation; obtaining the second air volume by dividing the required supply air volume or the required exhaust air volume of the rooms requiring ventilation by the expected residence time of the occupants; comparing the first air volume with the second air volume; setting the value obtained by multiplying the maximum opening amounts of the exhaust diffuser (1) and the supply air diffuser (2) by a value obtained by dividing the first air volume by the second air volume as the opening amount when the first air volume is greater than the second air volume; It may be characterized in that it is calculated through a step of setting the maximum opening amount of the exhaust diffuser (1) and the supply air diffuser (2) as the opening amount when the first air volume is equal to or smaller than the second air volume.

[0043] In one embodiment of the present invention, the exhaust diffuser (1) comprises a main body (10) having an upper opening (12) connected to an exhaust fan (220) at the upper and lower ends and a lower opening (11) for intake of indoor air, respectively; an attachment part (20) located at the center inside the main body (10) and having an ultrafine dust sensor (50) and a carbon dioxide sensor (70) fixed thereto; a motor (60) fixed inside the attachment part (20) and controlled by the communication part (1100); and a rack gear part (30) that is raised and lowered by the rotation of the motor (60), and has one end penetrating the upper end of the attachment part (20) and the other end connected to a diffuser cone (40) in which a human body detection sensor (80) is installed; The above diffuser cone (40) is raised and lowered by the rotation of the motor (60), and the lower opening (11) is raised and lowered by the rotation of the motor (60), and the opening amount of the lower opening (11) is adjusted by opening and closing the lower opening (11).

[0044] In one embodiment of the present invention, a supply air diffuser (2) comprises: a main body (100) having an upper opening (120) connected to an air supply fan (210) at the upper and lower ends, and a lower opening (110) for supplying outside air into a room; an attachment part (200) located at the center inside the main body (100) and having an ultrafine dust sensor (500) and a carbon dioxide sensor (700) fixed thereto; a motor (600) fixed inside the attachment part (200) and driven by the communication part (1100); a rack gear part (300) that is moved up and down by the rotation of the motor (600), has one end penetrating the upper end of the attachment part (200), and has a human body detection sensor (800) installed on one end thereof, and is connected to a diffuser cone (400) having a plurality of perforations (410) formed on the surface; It may be characterized in that it comprises a pleated filter (920) formed along the lower opening (110) of the main body (100) and the outer surface of the diffuser cone (400); and a filter (910) installed on the upper part of the diffuser cone (400); and the diffuser cone (400) is raised and lowered by the rotation of the motor (600), and the opening amount of the lower opening (110) is adjusted by opening and closing the lower opening (110).

[0045] In one embodiment of the present invention, the third step may be characterized by comprising: a 12th step of ventilating the room for a predetermined period of time by maximizing the opening amounts of the exhaust diffuser (1) and the supply air diffuser (2); a 13th step of continuously measuring the concentration of ultrafine dust and carbon dioxide using an ultrafine dust sensor (50) and a carbon dioxide sensor (70) during the indoor ventilation; a 14th step of calculating a first concentration, which is an average value of the concentration of ultrafine dust measured by the ultrafine dust sensor (50) during the indoor ventilation, and a second concentration, which is an average value of the concentration of carbon dioxide measured by the carbon dioxide sensor (70), using the calculation unit (1200); and a step of setting the first concentration and the second concentration as the concentration of ultrafine dust and the concentration of carbon dioxide, respectively.

[0046] In one embodiment of the present invention, when the concentration of ultrafine dust measured by the ultrafine dust sensor (500) is higher than the concentration of ultrafine dust measured by the ultrafine dust sensor (50), or the concentration of carbon dioxide measured by the carbon dioxide sensor (700) is higher than the concentration of carbon dioxide measured by the carbon dioxide sensor (70), the supply fan (210) and the exhaust fan (220) may be stopped.

[0047] In one embodiment of the present invention, it may be characterized in that the supply fan (210) and the exhaust fan (220) are stopped when there is no room requiring ventilation in the fourth step.

[0048] In one embodiment of the present invention, when the measurement results of the human body detection sensor (80) installed in the exhaust diffuser and the human body detection sensor (800) installed in the supply air diffuser do not match, a larger measurement result is selected to identify the room where occupants are present and the number of occupants.

[0049]

[0050] By installing an ultra-fine dust sensor and a carbon dioxide sensor on one side of the diffuser cone, the aesthetics are improved, and since the sensing is performed on the indoor air being ventilated, the measurement accuracy can be drastically improved.

[0051] By acquiring the lifestyle patterns of occupants through machine learning using artificial intelligence and determining the expected residence time of the occupants, the air volume can be adjusted to complete ventilation during the occupant's residence time.

[0052] The ultrafine dust sensor and carbon dioxide sensor installed inside the diffuser can be easily removed and attached using elastic clips, and are housed inside a dedicated home to improve maintainability.

[0053] If the concentration of ultrafine dust or carbon dioxide outside is higher than that inside, ventilation can be forcibly turned off to prevent further damage even if the concentration of ultrafine dust or carbon dioxide inside is higher than the standard concentration.

[0054] By using artificial intelligence to control ventilation air volume according to the user's lifestyle patterns, the operating time of exhaust and supply fans can be optimized, maximizing energy efficiency.

[0055] By installing human detection sensors on both the exhaust and supply diffusers and selecting the larger measurement result when the measurement results differ, damage to occupants due to sensor malfunction can be minimized.

[0056] A display unit that can display the current state of ultrafine dust and carbon dioxide concentration in color at the bottom of the diffuser body can be placed to increase user satisfaction.

[0057] In addition to the effects described above, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

[0058]

[0059] Figure 1 is a conceptual diagram of indoor ventilation using an existing diffuser system.

[0060] Figure 2 is a conceptual diagram of indoor ventilation using a diffuser system according to the present invention.

[0061] Figure 3 is a cross-sectional view of the exhaust diffuser of the present invention.

[0062] Figure 4 is a perspective view showing an embodiment in which an ultrafine dust sensor is attached to a diffuser attachment according to the present invention.

[0063] Figure 5 is an exploded view showing the connection relationship between elements constituting the exhaust diffuser according to the present invention.

[0064] Figure 6 is an operational diagram showing that the diffuser according to the present invention adjusts the opening amount through motor rotation.

[0065] Figure 7 is a cross-sectional view of a supply diffuser according to the present invention.

[0066] Figure 8 is a bottom view of the air supply diffuser of the present invention.

[0067] Figure 9 is an operation diagram of a diffuser system control unit according to the present invention.

[0068] Figure 10 is a flowchart showing a control method of a diffuser system according to the present invention.

[0069]

[0070] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0071] The parts necessary for understanding the operation and function according to the present invention are described in detail.

[0072] When describing embodiments of the present invention, descriptions of technical contents that are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted.

[0073] This is to convey the gist of the present invention more clearly without obscuring it by omitting unnecessary explanations.

[0074] In addition, in describing the components of the present invention, different reference numerals may be given to components with the same name depending on the drawings, and the same reference numerals may be given to different drawings.

[0075] However, even in such cases, this does not mean that the components have different functions depending on the embodiment, or that they have the same function in different embodiments, and the function of each component should be judged based on the description of each component in the embodiment.

[0076] In addition, the technical terms used in this specification should be interpreted as having a meaning generally understood by a person of ordinary skill in the technical field to which the present invention pertains, unless specifically defined otherwise in this specification, and should not be interpreted in an overly comprehensive or overly narrow sense.

[0077] Additionally, singular expressions used herein include plural expressions unless the context clearly indicates otherwise.

[0078] In this application, terms such as “comprises” or “comprising” should not be construed to necessarily include all of the components or steps described in the specification, and should be construed to mean that some of the components or some of the steps may not be included, or that additional components or steps may be included.

[0079] The present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and the present embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform a person having ordinary skill in the art of the scope of the invention.

[0080] Figure 1 illustrates a ventilation system in which exhaust and supply diffusers are installed in each of multiple rooms.

[0081] Conventional ventilation systems using diffusers have the disadvantage that the entire diffuser system in the building operates when the concentration of the carbon dioxide sensor or ultra-fine sensor installed inside exceeds a certain level.

[0082] In addition, since the time required for the above ventilation cannot be specified, the opening of the diffuser cone is actually set to the maximum and used, which places a great burden on the exhaust fan and supply fan and has the disadvantage of lowering energy efficiency.

[0083] Figure 2 is a conceptual diagram of a diffuser system proposed in the present invention, in which a control unit (1000) analyzes the capacity of an outdoor supply fan (2100) and an exhaust fan (2200) and the lifestyle patterns of occupants, calculates an appropriate ventilation CMH that can eliminate indoor pollution within the occupants' residence time, and then implements it through an exhaust diffuser (1) and a supply diffuser (2).

[0084] Figure 3 is a cross-sectional view of the exhaust diffuser (1) proposed in the present invention.

[0085] The above exhaust diffuser (1) is configured to include a main body (10) having an upper opening (12) formed at the upper end to be connected to an exhaust fan (2200) and a lower opening (11) formed at the lower end to suck in indoor air, an attachment part (20) located at the center inside the main body (10) to which an ultrafine dust sensor (50) and a carbon dioxide sensor (70) are fixed, a motor (60) fixed inside the attachment part (20); a rack gear part (30) that is raised and lowered by the rotation of the motor (60) and has one end penetrating the upper end of the attachment part (20) and the other end connected to a diffuser cone (40) in which a human body detection sensor (80) is installed; and the diffuser cone (40) is raised and lowered by the rotation of the motor (60) and is configured to adjust the opening amount of the lower opening (11) by opening and closing the lower opening (11).

[0086] The exhaust fan (2200) that provides suction power to the exhaust diffuser (1) must provide suction power to all of the multiple exhaust diffusers (1) installed in each room, so the ventilation performance continuously changes depending on whether air is ventilated to users in other rooms.

[0087] Such fluctuations can be uncomfortable for occupants, and even if existing diffusers have the ability to adjust airflow, manually finding the appropriate ventilation CMH each time is a difficult task.

[0088] The above motor (60) rotates and raises and lowers the rack gear part (30) by means of a screw part (61) that engages with the rack gear part (30) on one side.

[0089] The lower end of the above rack gear part (30) is fixed to the diffuser cone (40) that opens and closes the lower opening (11), so when the rack gear part (30) rises, the diffuser cone (40) reduces the opening amount, and conversely, when the rack gear part (30) descends due to the rotation of the motor (60), the diffuser cone (40) also descends and increases the opening amount.

[0090] The suction force generated through the upper opening (12) is directly affected by the suction force of the exhaust fan (2200).

[0091] Since the suction power that the above exhaust fan (2200) can produce is fixed, if the number of rooms using the above exhaust diffuser (1) is large, the suction power naturally decreases.

[0092] At this time, if the motor (60) is driven according to the operation of the control unit (1000) and the opening amount increases, a constant exhaust air volume can always be maintained in the room.

[0093] The fact that a constant exhaust air volume is applied indoors has the advantage that the control unit (1000) can predict the point in time when ventilation is completed, and also has the advantage of preventing discomfort to occupants due to frequent changes in the exhaust air volume.

[0094] In addition, if the exhaust diffuser (1) reduces the opening amount at once due to ventilation termination, there is a risk that the pressure wave generated in the exhaust pipe may be transmitted to the exhaust fan (2200), causing a breakdown of the exhaust fan (2200).

[0095] The above ultrafine dust sensor (50) and carbon dioxide sensor (70) are both installed inside the main body (10) to measure the pollution level of the indoor air being taken in, so the measurement accuracy can be further improved compared to the existing method of measuring the pollution level only for the air around the sensor.

[0096] As mentioned above, ultrafine dust and carbon dioxide are heavier than air and settle to the floor, so the exhaust diffuser (1) must be operated to ventilate a certain amount so that the pollutants on the floor can be sucked up and captured as a measurement target.

[0097] The above ultrafine dust sensor (50) and carbon dioxide sensor (70) are installed in the first installation groove (23) and second installation groove (24) provided on the surface of the attachment part (20) to increase fixing stability.

[0098] If the ultrafine dust and carbon dioxide sensors are exposed to the outside as before, there is a high probability that they will malfunction even with minor vibrations or shocks.

[0099] A human body detection sensor (80) is installed at the bottom of the above diffuser cone (40), and the human body detection sensor (80) can measure the presence or absence of a person entering the room and the number of occupants.

[0100] If the control unit (1000) determines that there is no occupant in the room based on the measurement result of the above-mentioned inje detection sensor (80), the opening amount of the exhaust diffuser (1) in the room is set to '0' to minimize the load of the exhaust fan (2200).

[0101] In addition, when there is an occupant, the measurement result of the human body detection sensor (80) is transmitted to the learning storage unit (1300) of the control unit (1000) in the future, and can be used as data for predicting the occupant pattern by machine learning the occupant's residence time, amount of carbon dioxide generated, etc.

[0102] Figure 2 shows an ultrafine dust sensor (50) attached to the above attachment part (20).

[0103] The above ultrafine dust sensor (50) can be installed in the first installation groove (23) as described above and then fixed with a plurality of elastic clips (25).

[0104] The above elastic clip (25) has the advantage of being easily removable when replacing or inspecting the sensor because it undergoes elastic deformation with a slight pressure.

[0105] A perforation is formed on the upper part of the above attachment part (20) through which the rack gear part (30) passes, and the perforation also serves to support and guide the rack gear part (30).

[0106] Accordingly, the above rack gear part (30) is guided at two points by the screw part (61) at the bottom and the perforation at the top, so that tilting does not occur even when the motor (60) rotates and the movement is raised and lowered.

[0107] If tilting occurs in the above rack gear part (30), this may cause unnecessary load on the motor (60) and damage the internal stator or rotor, thereby shortening the lifespan.

[0108] Figure 5 shows an exploded view of the above exhaust diffuser (1).

[0109] The carbon dioxide sensor (70) is installed in the second installation groove (24) on the surface of the attachment portion (20) and the carbon dioxide sensor (70) is fixed with a plurality of elastic clips (25).

[0110] In addition, a fixing part (21) having a plurality of elastic legs is attached to the lower end of the attachment part (20), and a fixing clip (211) is formed at the end of the fixing part (21) to be detachably fixed to one side of the lower end of the main body (10).

[0111] Therefore, the exhaust diffuser (1) can be easily disassembled for maintenance by releasing the fixing clip (211) with a slight pressure to separate the attachment part (20), and then releasing the elastic clip (25) that fixes the ultrafine dust sensor (50) and carbon dioxide sensor (70) attached to the attachment part (20) with a slight pressure.

[0112] This ease of disassembly will lead to easier repairs, cleaning, and maintenance in the future, which will increase user satisfaction.

[0113] In addition, a first display unit (13) that shows the concentration of ultrafine dust in color and a second display unit (14) that shows the concentration of carbon dioxide in color are arranged on one side of the lower portion of the main body (10).

[0114] The first display unit (13) and the second display unit (14) above display the measurement results of the ultrafine dust sensor (50) and the measurement results of the carbon dioxide sensor (70) separately, thereby showing the general level of air pollution in the room without the occupant necessarily having to check the sensing results through the control unit (1000), thereby increasing the occupant's satisfaction with the use.

[0115] If the first display unit (13) and the second display unit (14) indicate that the indoor air pollution level is still high even though the exhaust diffuser (1) has been in operation to a considerable extent, this may also be seen as indicating a failure of the ultrafine dust sensor (50) and the carbon dioxide sensor (70).

[0116] In addition, leak-preventing rubber (13) is installed at a predetermined interval along the lower opening (11) of the main body (10), and a leak-preventing section (41) is formed on the outer surface of the diffuser cone (40) to contact the leak-preventing rubber (13) and seal the lower opening (11).

[0117] The above components must come into contact with each other to make the opening amount '0' when there is no occupant in the room, when the air pollution level in the room with occupants is adjusted to below the ultrafine dust and carbon dioxide concentration standards through the operation of the exhaust diffuser (1) system, or when the ultrafine dust or carbon dioxide concentration in the outside air is higher than the ultrafine dust or carbon dioxide concentration in the room.

[0118] Even under the conditions described above, if the opening amount of the exhaust diffuser (1) is not '0', the suction power of the exhaust fan (2200) will continuously affect the room through the lower part of the exhaust diffuser (1) body (10), which may soon become the starting point for causing an overload of the entire ventilation system.

[0119] This adjustment of the opening amount of the above diffuser occurs continuously, and in the case of the existing diffuser system, damage to the lower part of the main body (10) or breakage of the diffuser cone (40) frequently occurs due to micro-collisions between the diffuser main body and the diffuser cone that occur when adjusting the opening amount. However, if the combination between the leak-proof rubber (13) and the leak-proof end (41) of the present invention is applied, this problem of reduced durability can be fundamentally eliminated.

[0120] In addition, the above leak-preventing rubber (13) can be replaced by the user when hardening occurs due to long-term use.

[0121] As another embodiment, the leak-preventing rubber (13) may be installed by being seated in a third installation groove formed at the bottom of the main body. At this time, double-sided tape may be used at the contact portion between the leak-preventing rubber (13) and the third installation groove, or the size of the third installation groove may be made smaller than the leak-preventing rubber (13) so that the leak-preventing rubber (13) can be fixed by its own elastic restoring force.

[0122] Figure 6 shows that the motor (60) of the exhaust diffuser (1) rotates to raise and lower the rack gear part (30) to adjust the opening amount.

[0123] If ventilation is required in multiple rooms at the same time, the exhaust air volume that the exhaust fan (2200) can supply is limited, so the exhaust air volume of the exhaust diffuser (1) provided to each room also continuously changes.

[0124] However, as in the system illustrated in Fig. 6, the diffuser cone (40) at the bottom of the rack gear section (30) moves up and down and changes the air intake area through the bottom opening (11), so that a constant ventilation air volume can always be provided indoors.

[0125] Figure 7 shows a cross-sectional view of the air supply diffuser (2).

[0126] The above-described air supply diffuser (2) comprises a main body (100) having an upper opening (120) connected to a supply fan (2100) at the upper end and a lower opening (110) for supplying air to the room at the lower end, similar to the exhaust diffuser (1) described above; an attachment part (200) located at the center inside the main body (100) and to which an ultrafine dust sensor (500) and a carbon dioxide sensor (700) are fixed; a motor (600) fixed inside the attachment part (200); a rack gear part (300) that is raised and lowered by the rotation of the motor (600) and has one end penetrating the upper end of the attachment part (200) and the other end connected to a diffuser cone (400) having a human body detection sensor (800) installed on one side; a pleated filter (920) formed along the lower opening (110) of the main body (100) and the outer circumference of the diffuser cone (400); The above diffuser cone (400) is raised and lowered by the rotation of the motor (600), and has a mechanism for adjusting the opening amount of the lower opening (110) by opening and closing the lower opening (110).

[0127] During operation of the above supply air diffuser (2), the supply air volume is always adjusted to be the same as the exhaust air volume of the above exhaust diffuser (1).

[0128] If there is a difference in air volume between the exhaust diffuser (1) and the supply diffuser (2), the indoor air pressure becomes different from the outside air pressure, which may cause pain such as dizziness and tinnitus to the occupants.

[0129] Most of the configuration is the same as the exhaust diffuser (1) described above, but there is a difference in that the ultrafine dust sensor (500) and carbon dioxide sensor (700) installed on the attachment part (200) of the supply air diffuser (2) sense the outside air, not the indoor air.

[0130] Recently, there are many days when the concentration of ultrafine dust outside is temporarily higher than that inside, so even if the concentration of ultrafine dust or carbon dioxide inside does not meet the ultrafine dust concentration standard and carbon dioxide concentration standard preset by the manager in the control unit (1000), it is advantageous for the occupants not to ventilate.

[0131] Therefore, in the present invention, an ultrafine dust sensor (500) and a carbon dioxide sensor (700) are installed in the air supply diffuser (2) to simultaneously measure the indoor and outdoor units during ventilation.

[0132] The above ultrafine dust sensor (500) and carbon dioxide sensor (700) are also necessary to calculate the amount of ventilation air required to normalize the air in a room where occupants are present when the air is below the ultrafine dust concentration standard or carbon dioxide concentration standard.

[0133] That is, if the concentration of ultrafine dust and carbon dioxide in the outdoor air is much lower than the ultrafine dust concentration standard and carbon dioxide concentration standard, the total amount of air required for indoor ventilation may be small, but if the concentration of ultrafine dust and carbon dioxide in the outdoor air is slightly lower than the ultrafine dust concentration standard and carbon dioxide concentration standard, a relatively large amount of ventilation is required.

[0134] The lower opening (110) of the main body (100) of the above-mentioned air diffuser (2) and the outer surface of the diffuser cone (400) are sealed with a pleated filter (920).

[0135] The above-mentioned wrinkle filter (920) can flexibly respond to changes in the opening amount that occur when the diffuser cone (400) fixed to the rack gear part (300) rises and falls due to the rotational movement of the above-mentioned motor (600).

[0136] As another embodiment, the pleated filter (920) can be fixed to the main body (100) and the diffuser cone (400) with Velcro, double-sided tape, or a ring, so that the pleated filter (920) can be easily replaced by the user when its lifespan ends.

[0137] Since the outside air supplied to the room through the above-mentioned supply fan (2100) must pass through the above-mentioned pleated filter (920), an outside static pressure may occur.

[0138] Therefore, in order to maintain the same supply air volume as the exhaust diffuser (1) in the case of the above supply diffuser (2), the opening amount of the above supply diffuser (2) must be set to be greater than the opening amount of the above exhaust diffuser (1).

[0139] As another embodiment to overcome this, a plurality of perforations (430) may be formed in the diffuser cone (400), and a separate filter (910) may be placed on the upper portion of the diffuser cone (400).

[0140] The human body detection sensor (800) at the bottom of the above diffuser cone (400) measures the presence or absence of occupants and the number of occupants together with the human body detection sensor (80) of the exhaust diffuser (1).

[0141] The measurement result of the above human body detection sensor (800) is used to increase measurement accuracy by comparing it with the measurement result of the human body detection sensor (80) of the exhaust diffuser (1).

[0142] As in the above exhaust diffuser (1), if the control unit (1000) determines that there is no occupant in the room based on the measurement result of the inlet detection sensor (800), the opening amount of the supply air diffuser (2) in the room is set to '0' to minimize the load of the supply air fan (2100).

[0143] In addition, when there is an occupant, the measurement result of the human body detection sensor (800) is transmitted to the learning storage unit (1300) of the control unit (1000) in the future, and can be used as data for predicting the occupant pattern by machine learning the occupant's residence time, amount of carbon dioxide generated, etc.

[0144] The above ultrafine dust sensor (500) can be installed in the first installation groove (230) and then fixed with a plurality of elastic clips (25).

[0145] The above elastic clip (25) has the advantage of being easily removable when replacing or inspecting the sensor because it undergoes elastic deformation with a slight pressure.

[0146] The carbon dioxide sensor (700) is installed in the second installation groove (240) on the surface of the attachment portion (200) and the carbon dioxide sensor (700) is fixed with a plurality of elastic clips (25).

[0147] In addition, a fixing part (210) having a plurality of elastic legs is attached to the lower end of the attachment part (200), and a fixing clip (211) is formed at the end of the fixing part (210) to be detachably fixed to one side of the lower end of the main body (100).

[0148] Therefore, the above air supply diffuser (2) can be easily disassembled for maintenance by releasing the fixing clip (211) with a slight pressure to separate the attachment part (200), and then releasing the elastic clip (25) that fixes the ultrafine dust sensor (500) and carbon dioxide sensor (700) attached to the attachment part (200) with a slight pressure.

[0149] A perforation is formed on the upper part of the above attachment part (200) through which the rack gear part (300) passes, and the perforation also serves to support and guide the rack gear part (300).

[0150] On the lower side of the main body (100), a first display unit (130) that shows the concentration of ultrafine dust in color and a second display unit (140) that shows the concentration of carbon dioxide in color are arranged.

[0151] The first display unit (130) and the second display unit (140) above display the measurement results of the ultrafine dust sensor (500) and the measurement results of the carbon dioxide sensor (700) separately, thereby showing the general level of pollution in the outside air without the user having to check the sensing results through the control unit (1000), thereby increasing the user satisfaction.

[0152] In addition, leak-preventing rubber (130) is installed at a predetermined interval along the lower opening (110) of the main body (100), and a leak-preventing section (410) is formed on the outer surface of the diffuser cone (400) to contact the leak-preventing rubber (130) and seal the lower opening (110).

[0153] The above components must come into contact with each other to make the opening amount '0' when there is no occupant in the room, when the air pollution level in the room with occupants is adjusted to be below the ultrafine dust and carbon dioxide concentration standards through the operation of the exhaust diffuser (1) system, or when the ultrafine dust sensor (500) and carbon dioxide sensor (700) measure that the outdoor ultrafine dust or carbon dioxide concentration is higher than the indoor ultrafine dust or carbon dioxide concentration.

[0154] Even under the conditions described above, if the opening amount of the air supply diffuser (2) is not '0', the supply power of the air supply fan (2100) will continuously affect the room through the lower part of the main body (100) of the air supply diffuser (2), which may soon become the starting point for causing an overload of the entire ventilation system.

[0155] This adjustment of the opening amount of the above diffuser occurs continuously, and in the case of the existing diffuser system, damage to the lower part of the main body (100) or breakage of the diffuser cone (400) frequently occurs due to micro-collisions between the diffuser main body and the diffuser cone that occur when adjusting the opening amount. However, if the combination between the leak-proof rubber (130) and the leak-proof end (410) of the present invention is applied, this problem of reduced durability can be fundamentally eliminated.

[0156] In addition, the above leak-preventing rubber (130) can be replaced by the user when hardening occurs due to long-term use.

[0157] As another embodiment, the leak-preventing rubber (130) may be installed by being seated in a third installation groove formed at the bottom of the main body. At this time, double-sided tape may be used at the contact portion between the leak-preventing rubber (130) and the third installation groove, or the size of the third installation groove may be made smaller than the leak-preventing rubber (130) so that the leak-preventing rubber (130) can be fixed by its own elastic restoring force.

[0158] FIG. 8 shows that a number of perforations (430) are formed at the bottom of the diffuser cone (400) to supplement the external static pressure generated by the above-described pleated filter (920) as described in the above-described embodiment.

[0159] Figure 9 shows the configuration and operation diagram of the above control unit (1000).

[0160] The above control unit (1000) is largely composed of a communication unit (1100), an operation unit (1200), and a learning storage unit (1300).

[0161] The above communication unit (1100) receives measurement information from the ultrafine dust sensor (50, 500), carbon dioxide sensor (70, 700) and human body detection sensor (80, 800) installed in each indoor exhaust diffuser (1) and supply air diffuser (2), respectively, transmits the information to the operation unit (1200), and instructs the motor (60, 600) to perform a driving command again in order to implement the operation result of the operation unit (1200).

[0162] In addition, it transmits the indoor air quality measured by the ultrafine dust sensor (50, 500) and carbon dioxide sensor (70, 700) to the user terminal (2000) carried by the user, and directly transmits the ultrafine dust and carbon dioxide concentration standards, the operating speed standards of the exhaust fan (2200) and the supply fan (2100) indicated through the user terminal (2000), and the like to the calculation unit (1200) or the exhaust fan (2200) and the supply fan (2100).

[0163] The above calculation unit (1200) firstly performs the function of checking whether the results measured by the ultrafine dust sensor (50, 500) and the carbon dioxide sensor (70, 700) meet the ultrafine dust concentration standard or the carbon dioxide concentration standard, secondly, when a room requiring ventilation is specified, the function of setting the required air supply and exhaust volumes required to make the indoor air below the ultrafine dust concentration standard or the carbon dioxide concentration standard, and thirdly, the function of calculating the opening amount of the exhaust diffuser (1) and the supply air diffuser (2) required to complete ventilation for the occupant's residence time using the required air supply and exhaust volumes.

[0164] The first function is used to identify the room that requires ventilation, the second function is necessary to improve the energy efficiency of the entire ventilation system, and the third function is necessary to create a comfortable air quality while the occupants are living there.

[0165] The above learning storage unit (1300) has the following functions: first, a function of setting the ultrafine dust concentration standard and the carbon dioxide concentration standard, which are conditions for operating the ventilation system; second, a function of calculating the expected residence time of the occupant and the expected carbon dioxide generation amount by performing machine learning using artificial intelligence based on the results measured by the ultrafine dust sensor (50) and carbon dioxide sensor (70).

[0166] If the time for which the occupant resides indoors is unknown, the standard for the air volume for projecting the required supply air volume and required exhaust air volume calculated by the calculation unit (1200) into the indoors cannot be set, and thus, even if the exhaust diffuser (1) and the supply air diffuser (2) actually have a function for controlling the air volume, a problem occurs in that ventilation must always be performed at the maximum air volume in order to complete ventilation in the shortest period of time.

[0167] Operation of this type of ventilation system will place a load on the supply fan (2100) and exhaust fan (2200), ultimately reducing energy efficiency.

[0168] Therefore, in the present invention, by predicting in advance the residence time of the occupants, the number of occupants, and the amount of carbon dioxide generated by the occupants in the learning storage unit (1300), an appropriate ventilation air volume for completing ventilation within the residence time of the occupants can be calculated based on the predicted values.

[0169] Figure 10 describes a control algorithm for indoor ventilation using the control unit (1000), exhaust diffuser (1), and supply diffuser (2) described above.

[0170] The above algorithm comprises: a first step in which a user or administrator sets an ultrafine dust concentration standard and a carbon dioxide concentration standard in the control unit (1000); a second step in which a room in which occupants are present and the number of occupants are specified from human body detection sensors (80, 800) installed in the exhaust diffuser (1) and the supply air diffuser (2), respectively; a third step in which the ultrafine dust and carbon dioxide concentrations in the room in which occupants are present are measured using the ultrafine dust sensor (50) and the carbon dioxide sensor (70) installed in the exhaust diffuser (1), and the external ultrafine dust and carbon dioxide concentrations are measured using the ultrafine dust sensor (500) and the carbon dioxide sensor (700) installed in the supply air diffuser (2), respectively; a fourth step in which an indoor space in which the ultrafine dust or carbon dioxide concentration is higher than the ultrafine dust and carbon dioxide concentration standard among the outdoor measurement results is specified as an indoor space requiring ventilation; A fifth step of calculating the required supply air volume and required exhaust air volume to make the concentration of ultrafine dust and carbon dioxide in the room requiring ventilation below the concentration standard of ultrafine dust and carbon dioxide; a sixth step of determining the exhaust air volume of the exhaust diffuser (1) and the supply air volume of the supply air diffuser (2) installed in the room requiring ventilation; a seventh step of driving the exhaust fan (2100) and the supply air fan (2200) installed outdoors; an eighth step of calculating the opening amounts of the exhaust diffuser (1) and the supply air diffuser (2) in the room requiring ventilation; a ninth step of adjusting the opening amounts of the exhaust diffuser (1) and the supply air diffuser (2) in the room requiring ventilation and ventilating; a tenth step of re-measuring the concentration of ultrafine dust and carbon dioxide in the room requiring ventilation using the ultrafine dust sensor (50) and the carbon dioxide sensor (70); If the re-measurement results show that the concentration of ultrafine dust and the concentration of carbon dioxide in the room requiring ventilation are below the ultrafine dust and carbon dioxide concentration standards, respectively, the 11th step is to set the opening amount of the exhaust diffuser (1) and the supply air diffuser (2) in the room requiring ventilation to '0'.

[0171] The concentration standard for the first step may be directly input into the control unit (1000) by a user or administrator, or may be input into a user terminal (2000) connected to the control unit (1000) via wired or wireless means.

[0172] In the second step above, if the measurement results of the human body detection sensor (80) installed in the exhaust diffuser and the human body detection sensor (800) installed in the supply air diffuser do not match, the larger measurement result is selected to identify the room where occupants are present and the number of occupants present.

[0173] In the third step above, even if the human body detection sensor (80, 800) recognizes an occupant, if the indoor air pollution level is measured immediately using the ultrafine dust sensor (50) and carbon dioxide sensor (70), the sensing target is limited to the air near the sensor, so the indoor ultrafine dust concentration and carbon dioxide concentration may be measured lower than the actual value.

[0174] This is because ultrafine dust and carbon dioxide are heavier than air and tend to settle to the floor when there are no people present.

[0175] Therefore, in order to accurately measure the level of air pollution in a room with occupants, it is necessary to measure the concentration of ultrafine dust and carbon dioxide while ventilating for a certain period of time.

[0176] To this end, first, a step is performed to ventilate the room for a predetermined period of time by maximizing the opening amount of the exhaust diffuser (1) and the supply air diffuser (2), a step is performed to continuously measure the concentration of ultrafine dust and carbon dioxide using an ultrafine dust sensor (50) and a carbon dioxide sensor (70) during the indoor ventilation, a step is performed to obtain a first concentration, which is an average value of the concentration of ultrafine dust measured by the ultrafine dust sensor (50) during the indoor ventilation, and a second concentration, which is an average value of the concentration of carbon dioxide measured by the carbon dioxide sensor (70), using the calculation unit (1200), and a step is performed to set the first concentration and the second concentration as the concentration of ultrafine dust and the concentration of carbon dioxide in the room, respectively.

[0177] In the fifth step above, the required air supply and exhaust air volumes required to ventilate a specific room requiring ventilation are calculated by adding the expected carbon dioxide generation of the occupants of the room to the required air supply and exhaust air volumes required to lower the concentration of ultrafine dust and carbon dioxide in the room requiring ventilation below the ultrafine dust and carbon dioxide concentration standards when there are no occupants in the room requiring ventilation.

[0178] Of course, at this time, the required air supply and required exhaust air are set to the same value and calculated.

[0179] The above estimated carbon dioxide emissions refer to the total amount of carbon dioxide generated while the occupant resides indoors.

[0180] In the above ninth step, the opening amounts of the exhaust diffuser (1) and the supply diffuser (2) are calculated in the calculation unit (1200) as described above.

[0181] The above calculation unit (1200) first calculates the maximum exhaust air volume and supply air volume that can be produced by driving the supply fan (210) and the exhaust fan (220), multiplies the maximum exhaust air volume and supply air volume by the external static pressure rate to obtain the practical exhaust air volume and supply air volume, divides the practical exhaust air volume and supply air volume by the total number of rooms requiring ventilation to obtain the first air volume, divides the required air volume or required exhaust volume of the rooms requiring ventilation by the expected residence time of the occupants to obtain the second air volume, compares the first air volume and the second air volume, if the first air volume is greater than the second air volume, sets the value obtained by multiplying the maximum opening amount of the exhaust diffuser (1) and the supply air diffuser (2) by the value obtained by dividing the first air volume by the second air volume as the opening amount, and if the first air volume is equal to or less than the second air volume, sets the maximum opening amount of the exhaust diffuser (1) and the supply air diffuser (2) to the value obtained by dividing the first air volume by the second air volume. It can be calculated as a step to set the opening amount.

[0182] The above external static pressure ratio refers to the loss rate that occurs until the exhaust air volume and supply air volume generated by the exhaust fan (2200) or supply fan (2100) are delivered to the exhaust diffuser (1) and supply air diffuser (2).

[0183] The above first air volume refers to the maximum air volume that can be supplied to a room requiring ventilation, and the second air volume refers to the minimum air volume required to complete ventilation during the time that occupants reside therein.

[0184] Therefore, the ventilation system manager can include in the control algorithm a task of increasing the second air volume by a certain percentage in order to complete ventilation of a room requiring ventilation more quickly.

[0185] If the first air volume is greater than the second air volume, it is necessary to adjust the opening amount of the exhaust diffuser (1) and the supply air diffuser (2) to supply a constant air volume. However, if the first air volume is less than the second air volume, the only way for the occupants to quickly feel comfortable with the air in the room requiring ventilation is to maximize the opening amount.

[0186] However, even if the indoor air in the building is below the ultrafine dust concentration standard and carbon dioxide concentration standard, if the outdoor ultrafine dust concentration or carbon dioxide concentration is higher than the indoor concentration, it is natural to immediately stop the operation of the supply fan (2100) and exhaust fan (2200).

[0187] The structure of the exhaust diffuser (1) and supply diffuser (2) used in the indoor ventilation control algorithm described above is the same as that described above.

[0188] This description presents one embodiment of the present invention, and provides examples to illustrate the invention and to enable those skilled in the art to make and use the invention. The specification, written in this manner, is not intended to limit the invention to the specific terms presented.

[0189] Accordingly, although the present invention has been described in detail with reference to the examples described above, those skilled in the art can make modifications, changes, and variations to the examples without departing from the scope of the present invention.

[0190] In short, it is to be understood that in order to achieve the intended effect of the present invention, it is not necessary to include all of the functional blocks depicted in the drawings separately or follow all of the orders depicted in the drawings in the exact order shown, and even if not, it may fall within the technical scope of the present invention described in the claims.

Claims

1. In the exhaust diffuser (1) that ventilates indoor air, The above exhaust diffuser (1) comprises a main body (10) having an upper opening (12) connected to an exhaust fan (2200) at the top and a lower opening (11) formed at the bottom to intake indoor air; An attachment part (20) located in the center of the inside of the main body (10) and to which an ultrafine dust sensor (50) and a carbon dioxide sensor (70) are fixed; A motor (60) fixed inside the above attachment part (20); It is configured to include a rack gear part (30) that is raised and lowered by the rotation of the above motor (60), has one end penetrating the upper part of the above attachment part (20), and has the other end connected to a diffuser cone (40) in which a human body detection sensor (80) is installed; The above-mentioned diffuser cone (40) is raised and lowered by the rotation of the above-mentioned motor (60), and the exhaust diffuser is characterized in that the opening amount of the lower opening (11) is adjusted by opening and closing the lower opening (11).

2. In claim 1, The above ultrafine dust sensor (50), carbon dioxide sensor (70) and human body detection sensor (80) are each inserted into the first installation groove (23), the second installation groove (24) formed in the attachment part (20) and the third installation groove (42) installed at the bottom of the diffuser cone (40), and the ultrafine dust sensor (50), carbon dioxide sensor (70) and human body detection sensor (80) are each fixed by an elastic clip (25) installed in the first installation groove (23) to the third installation groove (25), respectively.

3. In claim 1, An exhaust diffuser characterized in that a plurality of fixing parts (21) are arranged at the bottom of the above attachment part (20), and a fixing clip (211) that is fixed to one side of the bottom of the main body (10) is formed at the end of the fixing part (21).

4. In claim 1, An exhaust diffuser characterized in that a first display unit (14) that indicates the indoor ultrafine dust concentration in color and a second display unit (15) that indicates the indoor carbon dioxide concentration in color are installed on one side of the lower portion of the main body (10).

5. In claim 1 An exhaust diffuser characterized in that a leak-preventing rubber (13) is installed at a predetermined interval along the lower opening (11) at the lower end of the main body (10), and a leak-preventing end (41) is formed on the outer surface of the diffuser cone (40) to contact the leak-preventing rubber (13) and seal the lower opening (11).

6. In the air supply diffuser (2) that ventilates indoor air, The above air supply diffuser (2) comprises a main body (100) having an upper opening (120) connected to an air supply fan (2100) at the top and a lower opening (110) at the bottom for supplying air to the room; An attachment part (200) located in the center of the inside of the main body (100) and to which an ultrafine dust sensor (500) and a carbon dioxide sensor (700) are fixed; A motor (600) fixed inside the above attachment part (200); A rack gear part (300) that is raised and lowered by the rotation of the above motor (600), has one end penetrating the upper part of the above attachment part (200), and the other end connected to a diffuser cone (400) having a human body detection sensor (800) installed on one side; A pleated filter (920) formed along the lower opening (110) of the main body (100) and the outer surface of the diffuser cone (400); The above diffuser cone (400) is raised and lowered by the rotation of the motor (600), and the supply air diffuser is characterized in that the opening amount of the lower opening (110) is adjusted by opening and closing the lower opening (110).

7. In claim 6, The above ultrafine dust sensor (500), carbon dioxide sensor (700) and human body detection sensor (800) are inserted into the first installation groove (230), the second installation groove (240) formed in the attachment part (200) and the third installation groove (420) installed at the bottom of the diffuser cone (400), respectively, and the ultrafine dust sensor (500), carbon dioxide sensor (700) and human body detection sensor (800) are fixed by elastic clips (25) installed in the first installation groove (230) to the third installation groove (250), respectively, of the supply air diffuser.

8. In claim 7, An exhaust diffuser characterized in that a plurality of fixing parts (21) are arranged at the bottom of the above attachment part (200), and a fixing clip (211) that is fixed to one side of the bottom of the main body (100) is formed at the end of the fixing part (21).

9. In claim 6, An air supply diffuser characterized in that a first display unit (140) that indicates the indoor ultrafine dust concentration in color and a second display unit (150) that indicates the indoor carbon dioxide concentration in color are installed on one side of the lower portion of the main body (100).

10. In claim 6, An air supply diffuser characterized in that a leak-preventing rubber (133) is installed at a predetermined interval along the lower opening (110) at the lower end of the main body (100), and a leak-preventing end (410) is formed on the outer surface of the diffuser cone (400) to contact the leak-preventing rubber (130) and seal the lower opening (110).

11. In a method for controlling the operation of an exhaust diffuser (1) and a supply diffuser (2) installed in each of a plurality of rooms by a control unit (1000), A first step of setting ultrafine dust concentration standards and carbon dioxide concentration standards in the above control unit (1000); A second step of identifying the room in which occupants are present and the number of occupants from the human body detection sensors (80, 800) installed in the exhaust diffuser (1) and the supply air diffuser (2), respectively; A third step of measuring the concentration of ultrafine dust and carbon dioxide in a room where occupants are present using the ultrafine dust sensor (50) and carbon dioxide sensor (70) installed in the exhaust diffuser (1), and measuring the concentration of external ultrafine dust and carbon dioxide using the ultrafine dust sensor (500) and carbon dioxide sensor (700) installed in the supply air diffuser (2); A fourth step of specifying an indoor space in which the ultrafine dust or carbon dioxide concentration is higher than the ultrafine dust and carbon dioxide concentration standards among the outdoor measurement results as an indoor space requiring ventilation; A fifth step of calculating the required air supply and exhaust volume to make the concentration of ultrafine dust and carbon dioxide in the above-mentioned ventilation-required room below the ultrafine dust and carbon dioxide concentration standards; Step 6 of determining the exhaust air volume of the exhaust diffuser (1) and the supply air volume of the supply air diffuser (2) installed in the above-mentioned room requiring ventilation; Step 7 of driving an exhaust fan (2100) and a supply fan (2200) installed outdoors; Step 8 of calculating the opening amount of the exhaust diffuser (1) and the supply diffuser (2) in the above-mentioned room requiring ventilation; Step 9: Adjusting the opening amount of the exhaust diffuser (1) and the supply diffuser (2) in the room requiring ventilation and ventilating; Step 10 of re-measuring the concentration of ultrafine dust and carbon dioxide in the room requiring ventilation using the ultrafine dust sensor (50) and carbon dioxide sensor (70); A diffuser control method characterized by including an 11th step of setting the opening amount of the exhaust diffuser (1) and the supply air diffuser (2) of the ventilation-required room to '0' when the ultrafine dust concentration and carbon dioxide concentration of the room requiring ventilation are respectively below the ultrafine dust and carbon dioxide concentration standards as a result of the re-measurement.

12. In claim 11, The above control unit (1000) includes a communication unit (1100) that receives measurement information from each indoor ultrafine dust sensor (50, 500), carbon dioxide sensor (70, 700), and human body detection sensor (80, 800); A learning storage unit (1300) that stores ultrafine dust and carbon dioxide concentration standards and machine-learns the residence time of each indoor occupant and the carbon dioxide emission amount of the occupant from the measurement information of the human body detection sensor (80, 800) received by the communication unit (1100) to calculate the expected residence time and expected carbon dioxide emission amount of each indoor occupant; and A diffuser control method characterized by comprising: a calculation unit (1200) that identifies a room in which an occupant is present from the human body detection sensor (80, 800), and calculates the required air supply and exhaust volume to adjust the concentration of ultrafine dust or carbon dioxide in the room to below the ultrafine dust and carbon dioxide standard concentration level when the concentration is higher than the ultrafine dust and carbon dioxide standard concentration level; 13. In claim 12, The above required air supply and exhaust air volume are calculated by the above calculation unit (1200). A step of setting the required air supply and required exhaust air volumes to be the same; A step of calculating the amount of air supply and exhaust required to lower the concentration of ultrafine dust and carbon dioxide in the room requiring ventilation to below the ultrafine dust and carbon dioxide concentration standards when there is no occupant in the room requiring ventilation; A diffuser control method characterized in that it is calculated through a step of adding the expected carbon dioxide generation amount of the indoor occupants to the respective supply and exhaust amounts to obtain the required supply and exhaust amounts.

14. In claim 11, The opening amount of the exhaust diffuser (1) and the supply diffuser (2) is determined by the calculation unit (1200). A step of calculating the maximum exhaust air volume and supply air volume that can be produced by driving the supply fan (210) and exhaust fan (220); A step of calculating the practical exhaust air volume and supply air volume by multiplying the external static pressure ratio by the above maximum exhaust air volume and supply air volume. A step of obtaining a first wind volume by dividing the above practical exhaust air volume and supply air volume by the total number of rooms requiring ventilation; A step of obtaining a second air volume by dividing the required air supply or exhaust air volume of the above-mentioned room requiring ventilation by the expected residence time of the occupants; A step of comparing the first wind volume and the second wind volume; A step of setting the opening amount as the value obtained by multiplying the maximum opening amount of the exhaust diffuser (1) and the supply air diffuser (2) by the value obtained by dividing the first air volume by the second air volume when the first air volume is greater than the second air volume; A diffuser control method characterized in that it is calculated through a step of setting the maximum opening amount of the exhaust diffuser (1) and the supply diffuser (2) as the opening amount when the first air volume is equal to or smaller than the second air volume.

15. In claim 11, The above exhaust diffuser (1) comprises a main body (10) having an upper opening (12) connected to an exhaust fan (220) at the top and bottom, respectively, and a lower opening (11) for intake of indoor air; An attachment part (20) located in the center of the inside of the main body (10) and to which an ultrafine dust sensor (50) and a carbon dioxide sensor (70) are fixed; A motor (60) fixed inside the above attachment part (20) and controlled by the above communication part (1100); It is configured to include a rack gear part (30) that is raised and lowered by the rotation of the above motor (60), has one end penetrating the upper part of the above attachment part (20), and has the other end connected to a diffuser cone (40) in which a human body detection sensor (80) is installed; The above diffuser cone (40) is raised and lowered by the rotation of the motor (60), and the lower opening (11) is raised and lowered by the rotation of the motor (60), and the lower opening (11) is opened and closed, thereby adjusting the opening amount of the lower opening (11).

16. In claim 11, The above air supply diffuser (2) comprises a main body (100) having an upper opening (120) connected to an air supply fan (210) at the top and bottom, respectively, and a lower opening (110) for supplying outside air into the room; An attachment part (200) located in the center of the inside of the main body (100) and to which an ultrafine dust sensor (500) and a carbon dioxide sensor (700) are fixed; A motor (600) is fixed inside the above attachment part (200) and driven by the communication part (1100); A rack gear part (300) that is raised and lowered by the rotation of the above motor (600), has one end penetrating the upper part of the above attachment part (200), and has a human body detection sensor (800) installed on one side of the other end and is connected to a diffuser cone (400) having a plurality of perforations (410) formed on the surface; A pleated filter (920) formed along the lower opening (110) of the main body (100) and the outer surface of the diffuser cone (400); It is configured to include a filter (910) installed on the top of the above diffuser cone (400); The above diffuser cone (400) is raised and lowered by the rotation of the motor (600), and the diffuser control method is characterized in that the opening amount of the lower opening (110) is adjusted by opening and closing the lower opening (110).

17. In claim 11 Step 3 is; Step 12 of ventilating the room for a predetermined period of time by maximizing the opening amount of the exhaust diffuser (1) and the supply diffuser (2); Step 13 of continuously measuring the concentration of ultrafine dust and carbon dioxide using an ultrafine dust sensor (50) and a carbon dioxide sensor (70) during the above indoor ventilation; A 14th step of calculating a first concentration, which is an average value of the concentration of ultrafine dust measured by the ultrafine dust sensor (50) during the indoor ventilation, and a second concentration, which is an average value of the concentration of carbon dioxide measured by the carbon dioxide sensor (70), using the above calculation unit (1200); A diffuser control method characterized by comprising a step of setting the first concentration and the second concentration to the concentration of ultrafine dust and the concentration of carbon dioxide, respectively.

18. In claim 11 A diffuser control method characterized in that the supply fan (210) and the exhaust fan (220) are stopped when the concentration of ultrafine dust measured by the ultrafine dust sensor (500) is higher than the concentration of ultrafine dust measured by the ultrafine dust sensor (50), or when the concentration of carbon dioxide measured by the carbon dioxide sensor (700) is higher than the concentration of carbon dioxide measured by the carbon dioxide sensor (70).

19. In claim 11 A diffuser control method characterized in that the supply fan (210) and the exhaust fan (220) are stopped when there is no room requiring ventilation in the above fourth step.

20. In claim 11 A diffuser control method characterized in that, when the measurement results of the human body detection sensor (80) installed in the exhaust diffuser (1) and the human body detection sensor (800) installed in the supply air diffuser do not match, a larger measurement result is selected to identify the room in which occupants are present and the number of occupants present.

Images