Ventilation indicator

Abstract

The invention relates to a ventilation functionality indicator device, which is placed in connection with a ventilation valve. The device comprises a valve body (1) attached to the end of a ventilation duct on the side of the space subject to ventilation, and a disc-shaped or conical central part (3), and a threaded rod (2), which is attached to said parts, enabling the adjustment of the mutual distance between the central part (3) and the valve body (1). The device further comprises a ventilation measuring element (4), an indicator (5), a system circuit (7), an auxiliary-powered motor (6) and its bearing-mounted shaft (6a), and a power source (8) for providing electrical energy to said elements, and a digital display (9) for indicating the status to a user, a transmitter / receiver (10), a programming device (11), and a mobile device (12). In the device according to the invention, a measuring element (4) is arranged in connection with the valve for measuring airflow and / or air quality parameters and is connected to a system circuit (7) arranged inside the central part (3) for forming a control signal for the motor (6), the motor (6) being arranged in the space inside the central part (3) and connected in a bearing-mounted manner in connection with the threaded rod (2) and further via the shaft (6a) to the indicator (5) for moving it and for indicating the functionality of the ventilation to the user.

Description

[0001] VENTILATION INDICATOR

[0002] The invention relates to a device according to the preamble of the independent patent claim for indicating and measuring the operation of ventilation, which is intended to measure airflow and / or air quality from a ventilation duct and to indicate the suf ficiency of the airflow and / or air quality by means of a visually perceptible element .

[0003] BACKGROUND OF THE INVENTION

[0004] The purpose of ventilation is to bring clean breathing air into indoor spaces and to remove impurities generated within the building and those coming from outside the building . The purpose of ventilation is , as its name suggests , to exchange "used" indoor air for fresh and clean indoor air and thus ensure that the concentration of harmful substances in the indoor air does not rise to a level that is harmful to health . As a reference value for properly functioning ventilation, it can be considered, for example , that the indoor air is circulated so that the air in the space subj ect to ventilation is completely replaced every two hours . In this case , the indoor humidity percentage remains correct , odors do not have time to form, and possible radon concentrations do not have time to rise above the risk limits .

[0005] Thus , functioning ventilation and the monitoring of its operation are of great importance . In practice , the functionality of ventilation is af fected by, among other things , the cleanliness of the ventilation ducts and filters , the settings of the ventilation devices , and also the changes made by users to the ventilation devices and their settings . The functionality of ventilation is typically checked in connection with the cleaning of the ventilation ducts and the adj ustment of the ventilation, after which the monitoring of the ventilation system ' s operation is based almost exclusively on monitoring the reali zation of the set values of the ventilation device .

[0006] The operation of mechanical ventilation can also be monitored with the help of a building automation system . The building automation system monitors the operation of the ventilation devices ( supply and exhaust air machines ) . However, this does not provide information about the quantitative operation and / or air quality of the ventilation in the apartments or other spaces themselves . For example , i f there is a blockage in the ventilation duct leading from an apartment , a negative pressure is created in the ventilation system . The ventilation automation reacts to this by increasing the power of the exhaust air flow without solving the actual problem . The space-speci fic exhaust ventilation valve may also have been set incorrectly by either the property or the resident , or the make-up air may not be properly or suf ficiently arranged . Such error situations are not necessarily revealed by the ventilation monitoring of the building automation .

[0007] The purpose of the arrangement according to the present invention is to indicate to users the functionality of the ventilation under changing conditions visually . The observation of the ventilation ' s operation can be linked to both gravity-based and mechanical ventilation systems .

[0008] In the design, construction, and supervision of construction of ventilation, there are shortcomings concerning ventilation, which in the worst cases lead to the non- functioning of ventilation . For example, the monitoring of a property ' s ventilation may be completely absent , or it may be arranged inadequately, especially in the case of residential buildings .

[0009] The device according to the invention enables , for its part , the monitoring of ventilation operation and thus creates the conditions for healthy indoor air and reduces the public health problem caused by poorly functioning ventilation and the costs arising from it .

[0010] Publication US 6103201A discloses a propeller, speci f ically installed on the grille of a car ' s ventilation duct , which rotates under the ef fect of airflow without an external power source . The device , according to the invention, also acts as an air freshener . The device according to the invention is a passive element that gets its rotational force from the airflow of the car ' s ventilation device , and no other technical features have been presented for it , for example , for measuring airflow .

[0011] Publication CN105628971A di scloses an impeller-type indicator arranged in connection with a ventilation pipe , which is placed inside a transparent pipe section arranged as part of the ventilation duct to indicate the airflow . The indicator is not placed in connection with a ventilation valve , but in the ventilation duct , such that a part of the ventilation duct has been replaced with a transparent part , through which the movement of the impeller can be observed .

[0012] The invention according to publication CN105628972A concerns a short transparent pipe placed in a ventilation pipe or duct , inside which a ribbon that sways under the ef fect o f airflow is arranged . The movement of the ribbon indicates the magnitude and direction of the airflow . The publication only describes a ribbon arranged inside a transparent pipe , but not the use of the ribbon in connection with a ventilation valve . Furthermore , in addition to such a device , it is known to use , for example , a rotating impeller or other lightweight bodies moving under the ef fect of airflow instead of a ribbon, which can be arranged as part of the ventilation duct inside a transparent part .

[0013] Publication SE455819B, in turn, discloses a hood or fan cabinet related to ventilation, especially for cooker hoods , wherein the indication of airflow is achieved by means of a plate-like structure comprising thin threads arranged ins ide a casing portion within the region af fected by the airflow, said structure tilting under the influence of the airflow . The plate is connected to a rod-like indicator arranged outside the casing, which, as the inner plate turns under the ef fect of the airflow, turns and indicates the magnitude of the airflow with its angle .

[0014] Publication JP2004239661A discloses a device used for evaluating the flow of a flowing substance , such as a liquid or gas , which consists of a pipe made at least partially of a transparent material and a light spherical indicator arranged inside it , which moves along the path of the transparent part . The movement o f the indicator ball i s restricted by dam structures inside the pipe . As the liquid or gas flows through the pipe , the strength of the flow can be estimated based on the position of the ball . However, the publication does not disclose the device in connection with a ventilation valve .

[0015] Furthermore , publication GB765847A discloses a device equipped with a transparent part placed in connection with a ventilation pipe or the l ike . Inside the device , an impeller or a rotor that rotates according to the strength of the airflow is arranged . The publication does not disclose the device arranged in connection with ventilation valves .

[0016] Furthermore , publication SU1157585A1 discloses an airf low indicator which is placed in connection with ventilation . The publication describes an indicator that gives an electrical signal to a control circuit . The publication does not describe the placement of the device according to the invention in connection with a ventilation valve nor visually perceptible parts of the indicator .

[0017] Furthermore , for indicating airflow in connection with ventilation, it is known to use various measuring devices , such as an anemometer, especially a propeller anemometer, which has a rotating impeller that the airflow rotates , and a swinging-vane anemometer, where the airflow moves a thin strip, which is placed in a casing open at its ends , and on the side of which a transparent opening is arranged, in connection with which there is a measuring scale .

[0018] In the prior art solutions mentioned above , devices for indicating airflow in connection with ventilation, especially in ventilation ducts , have been described . In buildings , however, it is typical to place ventilation ducts invisibly behind surface structures , such as false ceilings , interior walls , and floors , so that only the surface-mounted valves remain visible . Correcting the deficiencies o f ventilation requires in the first phase the detection of the qualitative and quantitative weakness of the space-speci fic room air .

[0019] So that the quantitative non- functioning of the ventilation and the weakness of the air quality can be easily detected, a space-speci fic ventilation measuring and indicating device is needed . The current prior art publications do not describe indicators to be placed in connection with a ventilation valve , which visually indicate the state of ventilation to users .

[0020] The purpose of the present invention is to achieve a deci sive improvement to the problems presented above and thus to signi ficantly raise the state of the art prevailing in the field . To achieve this purpose , the invention i s characteri zed by what is presented in the characteri zing part of the independent patent claim directed to it .

[0021] PURPOSE OF THE INVENTION

[0022] The purpose of the device according to the invention is to present a device suitable for measuring and indicating airflow and / or air quality, placed in connection with a ventilation valve , which is intended to measure quantities af fecting the airflow and / or air quality from the ventilation duct and to indicate the suf ficiency of the airflow and / or air quality by means of a visually perceptible element and / or display, and to communicate information related to the suf ficiency of the airflow and / or air quality in the location space of the device and / or between the location space and the outdoors by means of a transmitter and receiver .

[0023] The purpose of the present invention is to make spacespeci fic observation easy, whereby corrective actions and / or repair planning can be undertaken as soon as the problems appear . The invention enables the monitoring of spacespeci fic quantitative operation and / or air quality o f ventilation by users of the spaces and by automatic monitoring / alarm functions of the ventilation . Furthermore , the detection of problems is continuous with the device according to the invention, either by the user ' s observations or by the system ' s automatic monitoring / alarm function . With the help of the invention, the level of indoor air qual ity can be easily, quickly, in real-time , and automatically detected . The invention enables , for its part , the systematic and comprehensive monitoring of ventilation operation and air quality .

[0024] The basic idea of the invention is to arrange in connection with a modern-type ventilation valve , where the distance between the valve body and the adj ustable central part is typically adj usted by means of a threaded rod, elements by means of which it is possible to measure the state of the ventilation and indicate it to a user, who is located in the space subj ect to ventilation .

[0025] DESCRIPTION OF THE INVENTION

[0026] The obj ect of the invention, a device for indicating the operation of ventilation, i s intended to be installed in connection with a ventilation valve . The indicator comprises at least one measuring element for measuring the ventilation airflow and / or air quality, an indicator, a system circuit , and a motor .

[0027] The device according to the invention is suitable for installation in both mechanical and gravity-based ventilation valves , which comprise a valve body and an adj ustable central part , wherein the valve body acts as a support structure for the other parts of the valve and further for installation in a duct , and to which the central part is attached by means of a threaded rod . Said threaded rod is then arranged to be tubular, an elongated piece open from the inside . Due to the tubular structure , it is possible to run, for example , electrical wires through it all the way to the space inside the duct , for example for at least one measuring element to be installed at the end of the threaded rod towards the duct . Furthermore , the threaded rod pierces the central part of the valve on the side of the space subj ect to ventilation, whereby it is possible to attach at least one indicator and / or the like to its end .

[0028] The measuring element attached to the end of the threaded rod on the duct side is a measuring device suitable for measuring airflow and / or air quality, by means of which it is possible with the device according to the invention to measure the magnitude of the airflow flowing in the duct and / or factors af fecting air quality, such as gases , smoke , fine particles and / or the like . The device , according to the invention, further comprises an indicator, such as an impeller placed on the side of the device in the space subj ect to ventilation, which is attached by its shaft structure in a bearing-mounted manner to the threaded rod . The indicator is moved by an auxiliary-powered, such as an electrically powered, motor, which receives its operating power from a power source , such as a battery and / or the mains supply, and which is connected via the shaft to said impeller . The device further comprises a system circuit , which receives measurement data from the measuring element and by means of which a control signal is given to the motor for rotating the indicator, such as the impeller . In this case , the device measures the magnitude and / or air quality of the airflow passing through the ventilation valve in the duct , and transmits the information to the system circuit , which further controls the motor to move the indicator, such as the impeller, whereby the user can observe the functionality of the ventilation directly from the space subj ect to ventilation .

[0029] As a preferred embodiment of the invention, it is possible to add to the connection of the valve a detector for smoke , humidity, gas and / or harmful substances , whereby it is possible to get a fault or alarm noti fication from said detector locally or via a remote connection . Furthermore , as a preferred embodiment of the invention, the information it provides can be transmitted to the user ' s terminal , such as a mobile device , for presenting the information to the user .

[0030] Among the most important advantages of the device according to the invention, it should be mentioned first of all its structure ' s suitability for replacing currently used ventilation valves without structural changes to the installation site . In connection with the device , it i s possible to utili ze currently used valve bodies , in which case only the central part o f the valve needs to be replaced with the device according to the invention .

[0031] With the device according to the invention, it is possible for the user to observe the functionality of the ventilation and the changes that occur in it directly from the space subj ect to ventilation without the need to monitor and / or adj ust , for example , the set values of the ventilation machine , which can be , for example, in a housing company, remarkably di f ficult due to access restrictions .

[0032] Other preferred embodiments of the device according to the invention are presented in the dependent patent claims directed thereto . LIST OF FIGURES

[0033] In the following description, the invention is illustrated in detail while referring to the accompanying drawings , in which figure 1 shows a cross-sectional view a preferred embodiment of the device of the invention as part of a valve used in gravity-based ventilation, figure 2 shows a cross-sectional view a preferred embodiment of the device of the invention as part of a valve used in mechanical ventilation, and figures 3a and 3b show cross-sectional views preferred embodiments of the device of the invention as exemplary schematic views , wherein the indicator and / or display is placed in a recess arranged in the central part of the ventilation valve .

[0034] DETAILED DESCRIPTION OF THE INVENTION

[0035] The obj ect of the invention is an indicator device for the operation of ventilation to be installed in connection with a ventilation valve , which comprises at least one ventilation measuring element 4 , an indicator 5 , a system circuit 7 , a motor 6 and a power source 8 .

[0036] The device according to the invention is suitable for installation in both valves used in connection with mechanical ventilation, especially exhaust air valves , which have a conical central part , and in exhaust air valves used in gravity-based ventilation, which have a disc-shaped central part . A conventional ventilation valve comprises a valve body 1 and an adj ustable disc-shaped or conical central part 3 . The valve body 1 acts as a support structure for the other parts of the valve and further for installation in a duct . To support the central part 3 , the valve body 1 typically comprises , arranged in its center on support arms to allow airflow, an internally threaded central hole lb of a mounting frame la, to which a threaded rod 2 arranged in the center of the central part 3 can be attached . In this case , by rotating the central part 3 , it is possible to adj ust the distance of the central part 3 relative to the valve body 1 , whereby the amount of airflow passing through the valve can be adj usted .

[0037] Departing from a conventional ventilation valve , in the device according to the invention, the threaded rod 2 arranged in the central part 3 and attached to the valve body 1 is arranged to be tubular, from the outside threaded and from the inside open, an elongated piece , whereby it is possible to run, for example , electrical wires through it to the space inside the duct , for the electrical connection of a measuring element 4 placed at the end of the threaded rod 2 . The threaded rod 2 can also be arranged to be internally threaded for attaching the measuring element 4 , indicator 5 and / or the like to its inner and / or outer thread . Furthermore , the hollow threaded rod 2 can pierce the central part 3 of the valve from its center, so that measuring devices , indicators and / or the like can be attached to the ends of the threaded rod 2 using the inner and / or outer threads of the threaded rod 2 for attachment . According to a preferred embodiment of the invention, the measuring element 4 is a measuring device suitable for measuring airflow, such as a di f ferential pressure or hotwire sensor or a pitot tube , which is adapted to be attached to the threaded rod 2 of the valve structure , for example by a counter-threaded fastening element of the measuring element 4 , so that the tip of the measuring element 4 points towards the inside of the ventilation duct . As a further preferred embodiment of the invention, the measuring element 4 is arranged to be thinner than the threaded rod 2 of the ventilation valve in order to f it it through the central hole lb for the threaded rod 2 in the mounting frame l a before attaching the central part 3 , such as the central cone or plate , to the mounting frame la .

[0038] The device of the invention comprises an indicator 5 , such as , referring to figure 1 , an impeller . The impeller acting as indicator 5 further comprises at least one blade , which is attached to a bearing 6b, 6c, allowing rotation, to a shaft 6a arranged in connection with the threaded rod 2 . In this case , the threaded rod 2 pierces the central part 3 of the valve , such as the central cone or plate , and attaches to the internally threaded central hole lb of the mounting frame la of the valve body 1 . A motor 6 is further connected to the indicator 5 , which is preferably a brushless electric motor, and which is equipped with a power source 8 , such as a battery and / or connected to the mains supply . The motor 6 is adapted to be installed in connection with the valve in the space on the side of the ventilation duct and it i s connected via the shaft 6a to said indicator 5 . The device of the invention further comprises a system circuit 7 , which receives measurement data from the measuring element 4 and provides a control signal for the motor 6 . In this case , the device according to the invention measures the magnitude of the airflow flowing in the duct through the ventilation valve , and transmits the information to the system circuit 7 , which further controls the motor 6 to move the indicator 5 , such as the impeller, whereby the user can observe the functionality of the ventilation directly from the space subj ect to ventilation . According to a preferred embodiment of the invention, the system circuit 7 controls the motor 6 , for example , so that when the airflow is in accordance with the setpoint value , the motor 6 causes a movement in the indicator 5 , which the user can observe from the space subj ect to ventilation . I f the airflow deviates from the setpoint value , it is possible , according to a preferred embodiment of the invention, to equip the indicator device with a digital display 9 to indicate the deviation .

[0039] The system circuit 7 further comprises a programmed circuit and / or logic, which controls the movement speed of the indicator 5 , such as the impeller, based on a preset airf low reference and / or adj ustment value . In this context , the system circuit 7 receives measurement data from the measuring element 4 and it is adapted to compare the measured airflow value and the preset airflow reference and / or adj ustment value to form a control signal for the indicator 5 .

[0040] As a preferred embodiment of the invention, the device may further comprise a programming device 11 , a digital display 9 , a transmitter / receiver 10 , and a mobile device 12 application . In this case , the programming device 11 is a device connected in a wireless and / or wired manner to the system circuit 7 for its programming . The digital display 9 is a display, such as an LCD or LED display, for numerical ly indicating the magnitude of the airflow, the state of the ventilation and / or the air quality and / or a light indicator indicating them with signal lights , which is connected to the system circuit 7 for indicating alarm limit values , suf ficient airflow and / or air quality . As a preferred embodiment of the invention, the digital display 9 can be adapted to indicate to the user a deviation between the measured airflow and / or air quality and their re ference value . Furthermore , the digital display 9 is , as a preferred embodiment of the invention, adapted to indicate i f the airflow is negative , i . e . , air flows from the exhaust duct into the apartment . At least one digital display 9 , as a further preferred embodiment of the invention, can also be placed separately from the valve structure , in which case the system circuit 7 is adapted to be in connection with said separately placed display in a wired or wireless manner via the transmitter / receiver 10 . The transmitter / receiver 10 is a device operating on a radio frequency, which is arranged in connection with the system circuit 7 and which is adapted to transmit information about the operation and / or air quality of the ventilation to the programming device 11 , to the mobile device 12 , which further comprises an application for processing and presenting the measurement data to the user, or to a corresponding terminal and / or property automation system or to receive information from a measuring element outside the valve , a display, a programming device , a mobile device or a corresponding terminal and / or a property automation system .

[0041] As a preferred embodiment of the invention, at least one measuring element 4 belonging to the device is a smoke , humidity, gas and / or harmful substance detector, such as an HCHO detector, impactor, or the like . As a further preferred embodiment of the invention, at least one of said measuring elements 4 is placed in the space subj ect to ventilation separately from the device of the invention, wherein the measuring element 4 is connected in a wired manner to the system circuit 7 or in a wireless manner to the system circuit 7 via the transmitter / receiver 10 for transmitting information to the system circuit 7 .

[0042] As a preferred embodiment of the invention, the device comprises one or more measuring elements 4 , in which case the measuring element 4 can be adapted to measure changes in the magnitude of the airflow and / or to measure quantities af fecting the air quality, whereby the device according to the invention can indicate the air quality to the user, for example , by means of an air quality index (AQI ) , in which case for determining the air quality index, the measuring element 4 is equipped with sensors that measure particulate emissions PM2 . 5 , where the particle si ze is less than 2 . 5 pm ( fine particulate emission, Particulate Matter 2 . 5 ) , particulate emissions PM10 ( coarser particles , particle si ze less than 10 pm) , ozone , nitrogen dioxide , sul fur dioxide , radon, volatile organic compounds (VOC ) , carbon monoxide or soot , smoke , humidity, dew point temperature , wet-bulb temperature , number of microbes and / or other corresponding quantities af fecting air quality .

[0043] As a preferred embodiment of the invention and with particular reference to figures 3a and 3b, a recess is arranged in the central part 3 of the valve , into which it is possible to fit the indicator 5 . The recess is arranged in the central part 3 with dimensions such that the indicator 5 can be embedded in all its parts inside the front surface of the central part 3 . Furthermore, as a preferred embodiment of the invention, a transparent window 3a, such as a glass or plastic window, is arranged in front of the recess of the central part , in which case the indicator 5 is fitted entirely into the recess of the valve , while still being observable by the user through the window 3a . Correspondingly, it is possible to arrange in the central part , with reference to figures 3a and 3b, another recess , where a digital display 9 can be placed, in which case the recess of the digital display 9 is correspondingly closed with a transparent window 9a, such as a glass or plastic window .

[0044] As a further preferred embodiment of the invention, accessories are arranged in the recess , such as a light 3b, which can be adapted to illuminate in di f ferent colors and by means of which it is thus possible to indicate the state of the ventilation and / or in dark conditions to act as a light for the indicator 5 and / or as a backlight . In this context , the indicator 5 can be made of a colored material or it can be made of a transparent material , such as acrylic plastic or plexiglass , in which case it can be illuminated with a separate light , whose light color can be variable . Furthermore , when making the indicator 5 from a transparent material , at least part of the light from the light 3b can be coupled into the structure of the indicator 5 , illuminating it .

[0045] As a further preferred embodiment of the invention, the device according to it is equipped with at least one of the following accessories : a camera, a speaker, a motion detector, and a microphone . Said one or more accessories are connected to the system circuit 7 of the device , in which case the accessories can be used for suf ficient airf low and / or air quality detection or indication in addition to monitoring and communication purposes .

[0046] As a preferred embodiment of the invention, the device according to it is adapted to send / receive in connection with a camera, speaker, motion detector, and microphone , in a wired or wireless manner, measured information related to airflow and / or air quality and information related to monitoring and communication to the system circuit 7 and by means of the transmitter / receiver 10 to the programming device 11 , to the mobile device 12 , which comprises an application for processing and presenting the information to the user, or to a corresponding terminal and / or property automation system .

[0047] It is obvious that the invention is not limited to the applications presented or described above , but can be modi fied within the framework of the basic idea of the invention depending on the circumstances by using, for example , the sensors best suited for the purpose at any given time for measuring airflow and various sensors for measuring indoor air quality . Furthermore, the indicator 5 providing a visual observation to the user and the element moving it can vary within the framework o f the basic idea of the invention, but in such a way that the information from the measurement of the airflow and / or air quality is transmitted to the user in the space subj ect to ventilation . The discshaped valve central part 3 belonging to the indicator device according to the invention and used especially in connection with gravity-based ventilation can be shaped so that a bevel or other design is arranged on the outermost part of its front edge , which makes it easier for the user, for example , in the installation situation to handle the central part 3 .

Claims

CLAIMS1. A ventilation functionality indicator device in connection with a ventilation valve, which comprises a valve body (1) attached to the end of a ventilation duct on the side of the space subject to ventilation and a disc-shaped or conical central part (3) , the valve body (1) further comprising a mounting frame (la) arranged in connection with it; a threaded rod (2) , which is movably attached to the mounting frame (la) of the valve body (1) and fixedly to the central part (3) so that by rotating the central part (3) , the mutual distance between the central part (3) and the valve body (1) can be adjusted; one or more air measuring elements (4) , such as an element suitable for measuring airflow and / or an element measuring air quality; at least one indicator (5) ; a system circuit (7) , which is a programmable circuit or logic; an auxiliary-powered motor (6) , such as an electric motor, and its shaft (6a) equipped with bearings (6b, 6c) ; and a power source (8) electrically connected to the system circuit (7) , motor (6) , indicator (5) , and measuring element (4) , such as a battery or a mains connection, for providing electrical energy to said elements; characterized in that the measuring element (4) is arranged in connection with the valve, the measuring element (4) being in connection with a system circuit (7) arranged inside the central part (3) for forming a control signal for the motor (6) , the motor (6) being further arranged in the space inside the central part (3) and electrically connected to the system circuit (7) for receiving the control signal, the motor (6) being further connected via the shaft (6a) equipped with bearings (6b, 6c) to the indicator (5) , which is arranged in connection with the central part (3) of the valve on the side of the space subject to ventilation to be observable by a user, for moving the indicator (5) with themotor (6) based on the control signal given by the system circuit (7) to indicate the functionality of the ventilation to the user.

2. The indicator device according to claim 1, characterized in that at least one measuring element (4) is an element suitable for measuring airflow, such as a differential pressure or hot-wire sensor, a pitot tube, or the like, and wherein the measuring element (4) is arranged in connection with the threaded rod (2) at its end towards the ventilation duct for measuring the airflow in the ventilation duct.

3. The indicator device according to claim 1 or 2, characterized in that at least one measuring element (4) is an element suitable for measuring air quality parameters, such as smoke, humidity, gases, harmful substances, microbes, and / or other substances present in the air, such as an HCHO detector, impactor, or the like, wherein the measuring element (4) is arranged in connection with the valve and / or separately from it in the space subject to ventilation, wherein the measuring element (4) is arranged in a wired or wireless connection with the system circuit (7) by means of a transmitter / receiver (10) .

4. The indicator device according to any of the preceding claims 1-3, characterized in that the threaded rod (2) is a tubular, from its outer and / or inner surface threaded, and from the inside open, elongated piece, wherein the electrical conductors of the measuring element (4) are led through the space inside the threaded rod (2) to the system circuit (7) .

5. The indicator device according to any of the preceding claims 1-4, characterized in that the measuring element (4) is a measuring device suitable for measuring airflow, such as a differential pressure sensor, hot-wire sensor, pitot tube, and / or the like, which is adapted to be attached to the inner and / or outer thread of the threaded rod (2) of the valve structure, for example, by a counterthreaded fastening element of the measuring element (4) , such that the tip of the measuring element (4) points in the direction of the ventilation duct.

6. The indicator device according to any of the preceding claims 1-5, characterized in that the indicator (5) is an impeller arranged on the outside of the central part (3) , which comprises at least one blade, which is attached in a manner allowing rotation by bearings (6b, 6c) to the shaft (6a) of the motor (6) arranged in connection with the threaded rod (2) piercing the central part (3) of the valve.

7. The indicator device according to any of the preceding claims 1-6, characterized in that the system circuit (7) comprises a programmed circuit and / or logic, which controls the movement speed of the indicator (5) based on a preset airflow reference and / or adjustment value and / or measurement results of air quality parameters, and processes information related to airflow and / or air quality, monitoring, and communication, and is in wired or wireless connection with a transmitter / receiver (10) , measuring element (4) , indicator (5) , motor (6) , power source (8) , digital display (9) , camera, motion detector, speaker, microphone, programming device (11) , mobile device (12) or a corresponding terminal device and / or property automationsystem for transmitting information related to airflow and / or air quality, monitoring, and communication.

8. The indicator device according to any of the preceding claims 1-7, characterized in that the device further comprises at least one digital display (9) arranged in connection with it on the side of the space subject to ventilation and / or elsewhere in the apartment, such as an LCD or LED display for indicating the state of the ventilation to the user.

9. The indicator device according to claim 8, characterized in that the digital display (9) is adapted in connection with the system circuit (7) and adapted to indicate the magnitude of the airflow, a deviation from a reference value, the measurement result of air quality parameters and / or the state of the ventilation numerically and / or with signal lights for indicating alarm limit values, sufficient airflow, and / or corresponding indications.

10. The indicator device according to any of the preceding claims 1-9, characterized in that it further comprises a programming device (11) , which is a device connected in a wireless and / or wired manner to the system circuit (7) for programming the system circuit (7) .

11. The indicator device according to any of the preceding claims 1-10, characterized in that it comprises at least one transmitter / receiver (10) , which is a radio frequency operating device, which is arranged in connection with the system circuit (7) and which is adapted to transmit / receive information related to airflow and / or air quality, monitoring, and communication in connection with the system circuit, measuring element, indicator, motor,power source, display, camera, motion detector, speaker, microphone, programming device, mobile device which comprises an application for processing, programming, controlling and displaying information, or a corresponding terminal device and / or property automation system.

12. The indicator device according to any of the preceding claims 1-11, characterized in that it is equipped with a camera, speaker, motion detector, and / or microphone, which is connected to the system circuit of the device.

13. The indicator device according to any of the preceding claims 1-12, characterized in that at least one recess is arranged in the central part (3) for fitting the indicator (5) and / or digital display (9) into the recess.

14. The indicator device according to claim 13, characterized in that the indicator (5) and / or digital display (9) is arranged in said recess of the central part (3) and wherein said recess is covered with a transparent window (3a, 9a) , such as a glass, plastic, or similar window.

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