WO2004029517A1 - Device for determining the quality of ambient air - Google Patents

Device for determining the quality of ambient air Download PDF

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Publication number
WO2004029517A1
WO2004029517A1 PCT/NL2003/000671 NL0300671W WO2004029517A1 WO 2004029517 A1 WO2004029517 A1 WO 2004029517A1 NL 0300671 W NL0300671 W NL 0300671W WO 2004029517 A1 WO2004029517 A1 WO 2004029517A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
threshold value
variable
room
variables
Prior art date
Application number
PCT/NL2003/000671
Other languages
French (fr)
Original Assignee
Vroege, Norbert, Peter
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vroege, Norbert, Peter filed Critical Vroege, Norbert, Peter
Priority to AU2003271233A priority Critical patent/AU2003271233A1/en
Priority to EP03751618A priority patent/EP1546612A1/en
Publication of WO2004029517A1 publication Critical patent/WO2004029517A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F24F11/526—Indication arrangements, e.g. displays giving audible indications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/70—Carbon dioxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a device for determining the quality of the ambient air in a room.
  • German patent 19700964 describes a multisensor which is used to control a heat treatment installation.
  • the atmosphere in rooms is important to the well being of humans and animals. This is true in particular in rooms in which a relatively large number of people are present. The presence of this relatively large number of people may cause the conditions in a room of this type to change rapidly.
  • One example is a classroom. It has been found that when the windows are closed conditions may deteriorate rapidly during the lesson, and consequently the ability of the pupils to absorb fresh information drops especially quickly. It has been found that the learning performance and attentiveness can be improved if the atmosphere in rooms of this type is improved.
  • the devices which have been used hitherto are particularly complicated and expensive, and consequently they are not in general use. Moreover, it has been found that devices of this type do not operate optimally under all conditions. If various parameters are being measured, it is preferable if, in the event of a defined threshold value for each variable being exceeded, a signal is emitted indicating that this threshold value has been exceeded. However, it has been found that even though defined threshold values are not exceeded, the climate in a certain room may nevertheless not satisfy the demands imposed upon it.
  • US-A-5,394,934 describes a device designed as a type of thermostat. It is to be attached to the wall of a room. The use of a device of this type is limited to the specific room.
  • the object of the present invention is to avoid the drawbacks described above and to provide a device which is simple to use and allows accurate determination of the climatic conditions inside a room, such as a classroom or other rooms in which a relatively large number of people are present.
  • this object is realized with a device for determining the quality of the ambient air in a room, comprising at least one sensor for measuring at least two variables, such as temperature, atmospheric humidity, number of particles, percentage of carbon dioxide, and a processing and comparison element for processing the signal emanating from the sensor, comparing the values of the variables in this signal with threshold values for these variables stored in a table and outputting an indication using a display and/or sound signal when said threshold value is passed, the level of the threshold value for a variable being dependent on the measured value for another variable, the parts of this device being accommodated in a stand-alone casing comprising a base, and the device comprising an energy store.
  • the threshold value for a variable, at which a signal is emitted when the threshold value is exceeded is not a constant value, but rather varies as a function of the value of other measured variables, i.e. if all the conditions are optimal apart from one condition, such as for example the atmospheric humidity, the threshold at which a signal is emitted will be relatively high. However, if an undesirable temperature level is approached at the same time, without the threshold value selected for this level being exceeded, the threshold value for the first variable, such as the atmospheric humidity, will be selected at a lower level and a signal will be emitted at an earlier stage.
  • the device By designing the device to be a stand-alone unit, accommodated in a case or housing which can be placed onto a table or the like, it is possible to quickly determine the climate in any room. Since the device has its own energy supply such as a battery, and has the option of emitting a sound signal, it is not necessary to take special measures in order to rapidly determine the air quality in any desired room. Moreover, the device according to the invention can be quickly changed between different rooms. For example, in schools it is possible to monitor a large number of classrooms using just one device.
  • the device is a structure without the need for any external cabling, i.e. the device is provided with its own energy supply and/or its own energy store.
  • An energy supply may, inter alia, comprise a solar cell, while an energy store may comprise a battery.
  • the indication which is given in order to characterize the conditions inside a room is carried out using a display, on which, for example, it is possible to present the temperature, atmospheric humidity and the like. Moreover, it is possible to use a sound and/or light signal to indicate whether certain threshold values are exceeded.
  • Fig. 1 diagrammatically depicts an embodiment of the device according to the invention.
  • Fig. 2 shows the block diagram of the device according to the invention.
  • the device according to the invention is denoted overall by 1. It is provided with a base 3 and a part 4 which projects from the base and in which there is a display 2.
  • a device of this type is a "stand-alone" unit and can easily be placed onto a desk or the like.
  • Fig. 2 diagrammatically depicts the structure of the device. 2 denotes the display, which is controlled by control/storage element 5. Sensors for determining four parameters, which sensors are denoted by 6, 7, 8 and 9, are connected to the control/storage element 5. These sensors can be used to detect the number of particles in the air, the percentage of carbon dioxide, the temperature and the humidity. Of course, it is also possible to measure other parameters, such as the conductivity and the like.
  • 12 denotes an antenna which symbolizes a transmission device.
  • 10 is a solar cell, while 11 is a battery.
  • 15 is a loudspeaker for emitting a sound signal, while 14 is an LED or other light-emitting element.
  • a table containing threshold values for each of the variables measured by sensors 6-9 is stored in element 5. If the values measured by the sensors 6, 8 and 9, for example, are well below the undesirable situation, the threshold value for the variable measured by sensor 7 is relatively high. However, if the values for the variables measured using the sensors 6, 8 and 9 approach their associated threshold values, without actually exceeding them, according to the invention the threshold value for the variable measured using sensor 7 is adjusted downward. If two of the sensors 6, 8 and 9 approach a threshold value, the threshold value of sensor 7 can be adjusted even further downward. Moreover, it is also possible, in such a situation, to adjust the threshold values for the sensors 6, 8 and/or 9 downward, i.e. lower threshold values are adopted for the combination measurement of the different variables if a number of threshold values are approached.
  • a warning signal can be given on display 2. Temperature, atmospheric humidity and the like can be presented on display 2.
  • the above-described device can be positioned without any physical connection to its surroundings, i.e. a single device can be used to alternately measure the climatic conditions in various rooms.

Abstract

Device for determining the quality of the ambient air in a room. There are at least two sensors which determine, for example, the temperatures, atmospheric humidity, number of particles or percentage of carbon dioxide. The value recorded by the sensor is compared with a threshold value which is stored in a memory. According to the invention, the threshold value of a variable is dependent on the measured value of another variable, i.e. if, for example, the atmospheric humidity limit is reached an alarm signal will be emitted at in relative terms a lower temperature than if the atmospheric humidity is far from reaching this limit.

Description

Device for determining the quality of ambient air
The present invention relates to a device for determining the quality of the ambient air in a room.
Devices of this type are generally known in the prior art. German patent 19700964 describes a multisensor which is used to control a heat treatment installation.
The atmosphere in rooms is important to the well being of humans and animals. This is true in particular in rooms in which a relatively large number of people are present. The presence of this relatively large number of people may cause the conditions in a room of this type to change rapidly. One example is a classroom. It has been found that when the windows are closed conditions may deteriorate rapidly during the lesson, and consequently the ability of the pupils to absorb fresh information drops especially quickly. It has been found that the learning performance and attentiveness can be improved if the atmosphere in rooms of this type is improved.
However, the devices which have been used hitherto are particularly complicated and expensive, and consequently they are not in general use. Moreover, it has been found that devices of this type do not operate optimally under all conditions. If various parameters are being measured, it is preferable if, in the event of a defined threshold value for each variable being exceeded, a signal is emitted indicating that this threshold value has been exceeded. However, it has been found that even though defined threshold values are not exceeded, the climate in a certain room may nevertheless not satisfy the demands imposed upon it.
US-A-5,394,934 describes a device designed as a type of thermostat. It is to be attached to the wall of a room. The use of a device of this type is limited to the specific room.
The object of the present invention is to avoid the drawbacks described above and to provide a device which is simple to use and allows accurate determination of the climatic conditions inside a room, such as a classroom or other rooms in which a relatively large number of people are present. In a device as described above, this object is realized with a device for determining the quality of the ambient air in a room, comprising at least one sensor for measuring at least two variables, such as temperature, atmospheric humidity, number of particles, percentage of carbon dioxide, and a processing and comparison element for processing the signal emanating from the sensor, comparing the values of the variables in this signal with threshold values for these variables stored in a table and outputting an indication using a display and/or sound signal when said threshold value is passed, the level of the threshold value for a variable being dependent on the measured value for another variable, the parts of this device being accommodated in a stand-alone casing comprising a base, and the device comprising an energy store.
According to the invention, the threshold value for a variable, at which a signal is emitted when the threshold value is exceeded, is not a constant value, but rather varies as a function of the value of other measured variables, i.e. if all the conditions are optimal apart from one condition, such as for example the atmospheric humidity, the threshold at which a signal is emitted will be relatively high. However, if an undesirable temperature level is approached at the same time, without the threshold value selected for this level being exceeded, the threshold value for the first variable, such as the atmospheric humidity, will be selected at a lower level and a signal will be emitted at an earlier stage. By designing the device to be a stand-alone unit, accommodated in a case or housing which can be placed onto a table or the like, it is possible to quickly determine the climate in any room. Since the device has its own energy supply such as a battery, and has the option of emitting a sound signal, it is not necessary to take special measures in order to rapidly determine the air quality in any desired room. Moreover, the device according to the invention can be quickly changed between different rooms. For example, in schools it is possible to monitor a large number of classrooms using just one device.
It has been found that in this way it is possible to obtain a device which operates particularly sensitively using relatively simple components, so that the device can be produced at low cost.
According to an advantageous embodiment of the invention, the device is a structure without the need for any external cabling, i.e. the device is provided with its own energy supply and/or its own energy store. An energy supply may, inter alia, comprise a solar cell, while an energy store may comprise a battery.
It is possible to use the device described above to wirelessly control a device for correcting the climate in a specific room.
The indication which is given in order to characterize the conditions inside a room is carried out using a display, on which, for example, it is possible to present the temperature, atmospheric humidity and the like. Moreover, it is possible to use a sound and/or light signal to indicate whether certain threshold values are exceeded.
The invention will be explained in more detail below on the basis of an exemplary embodiment which is illustrated in the drawing, in which:
Fig. 1 diagrammatically depicts an embodiment of the device according to the invention; and
Fig. 2 shows the block diagram of the device according to the invention.
In Fig. 1, the device according to the invention is denoted overall by 1. It is provided with a base 3 and a part 4 which projects from the base and in which there is a display 2. A device of this type is a "stand-alone" unit and can easily be placed onto a desk or the like.
Fig. 2 diagrammatically depicts the structure of the device. 2 denotes the display, which is controlled by control/storage element 5. Sensors for determining four parameters, which sensors are denoted by 6, 7, 8 and 9, are connected to the control/storage element 5. These sensors can be used to detect the number of particles in the air, the percentage of carbon dioxide, the temperature and the humidity. Of course, it is also possible to measure other parameters, such as the conductivity and the like.
12 denotes an antenna which symbolizes a transmission device. 10 is a solar cell, while 11 is a battery. 15 is a loudspeaker for emitting a sound signal, while 14 is an LED or other light-emitting element.
The device described above operates in the following way. A table containing threshold values for each of the variables measured by sensors 6-9 is stored in element 5. If the values measured by the sensors 6, 8 and 9, for example, are well below the undesirable situation, the threshold value for the variable measured by sensor 7 is relatively high. However, if the values for the variables measured using the sensors 6, 8 and 9 approach their associated threshold values, without actually exceeding them, according to the invention the threshold value for the variable measured using sensor 7 is adjusted downward. If two of the sensors 6, 8 and 9 approach a threshold value, the threshold value of sensor 7 can be adjusted even further downward. Moreover, it is also possible, in such a situation, to adjust the threshold values for the sensors 6, 8 and/or 9 downward, i.e. lower threshold values are adopted for the combination measurement of the different variables if a number of threshold values are approached.
If a certain threshold value is exceeded, this is indicated with the aid of sound or light. Moreover, a warning signal can be given on display 2. Temperature, atmospheric humidity and the like can be presented on display 2.
The above-described device can be positioned without any physical connection to its surroundings, i.e. a single device can be used to alternately measure the climatic conditions in various rooms.
Although the invention has been described above on the basis of a preferred embodiment, it should be understood that numerous modifications can be made to it, which will be obvious to the person skilled in the art on reading the above description and which lie within the scope of the appended claims.

Claims

Claims
1. A device (1) for determining the quality of the ambient air in a room, comprising at least one sensor (6-9) for measuring at least two variables, such as temperature, atmospheric humidity, number of particles, percentage of carbon dioxide, and a processing and comparison element (5) for processing the signal emanating from the sensor, comparing the values of the variables in this signal with threshold values for these variables stored in a table and outputting an indication using a display and/or sound signal when said threshold value is passed, the level of the threshold value for a variable being dependent on the measured value for another variable, the parts of this device being accommodated in a stand-alone casing comprising a base (3), and the device comprising an energy store.
2. The device as claimed in claim 1, comprising an energy supply (10, 11).
3. The device as claimed in one of the preceding claims, comprising an energy store (11).
4. The device as claimed in one of the preceding claims, comprising a transmission device (12) for emitting a signal to a further device for influencing a variable in said room.
5. The device as claimed in one of the preceding claims, in which said indication comprises a display (2). . The device as claimed in one of the preceding claims, in which said indication comprises a sound signal. . The device as claimed in one of the preceding claims, in which said indication comprises a light signal.
PCT/NL2003/000671 2002-09-30 2003-09-30 Device for determining the quality of ambient air WO2004029517A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003271233A AU2003271233A1 (en) 2002-09-30 2003-09-30 Device for determining the quality of ambient air
EP03751618A EP1546612A1 (en) 2002-09-30 2003-09-30 Device for determining the quality of ambient air

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1021562A NL1021562C2 (en) 2002-09-30 2002-09-30 Device operating independently for providing air quality information.
NL1021562 2002-09-30

Publications (1)

Publication Number Publication Date
WO2004029517A1 true WO2004029517A1 (en) 2004-04-08

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ID=32041044

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PCT/NL2003/000671 WO2004029517A1 (en) 2002-09-30 2003-09-30 Device for determining the quality of ambient air

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EP (1) EP1546612A1 (en)
AU (1) AU2003271233A1 (en)
NL (1) NL1021562C2 (en)
WO (1) WO2004029517A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010047322A1 (en) * 2010-10-01 2012-04-05 Abb Ag Electrical installation device with a room air quality indicator
CN103454378A (en) * 2012-05-30 2013-12-18 张跃 Multifunctional air quality detector
CN112015215A (en) * 2019-05-31 2020-12-01 智达电小二(天津)科技有限公司 Automatic control system for intelligent classroom

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111412619A (en) * 2020-02-28 2020-07-14 和湜(上海)建筑科技有限公司 Intelligent control system and control method for indoor environment
CN112817352A (en) * 2021-01-04 2021-05-18 河南职业技术学院 Wisdom classroom based on thing networking

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US5394934A (en) * 1994-04-15 1995-03-07 American Standard Inc. Indoor air quality sensor and method
US5428964A (en) * 1994-01-10 1995-07-04 Tec-Way Air Quality Products Inc. Control for air quality machine
US5589824A (en) * 1995-11-09 1996-12-31 Lynch Adam Q Multi-sensor detection system
DE19700964A1 (en) * 1997-01-14 1998-07-16 Probst Max Josef Arrangement for air-conditioning of living rooms and buildings
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DE19855056A1 (en) * 1998-11-28 2000-05-31 Auma Tec Ausbau Umwelt Und Anl Intelligent system for ventilation of individual rooms with window mounted unit for radio controlled operational units
WO2001037231A2 (en) * 1999-11-17 2001-05-25 Simulation Systems And Applications, Inc. Carbon monoxide detector for air vehicles
DE10028333A1 (en) * 2000-06-05 2001-12-06 Bauer Armin Safety radio circuit layout for applying to electrically operated ventilator systems and exhauster hoods requires no cabling installations

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US4462246A (en) * 1982-06-04 1984-07-31 Sierra Monitor Corporation Percent oxygen gauge
EP0518327A2 (en) * 1991-06-14 1992-12-16 Matsushita Electric Industrial Co., Ltd. Air quality conditioning system
EP0592796A1 (en) * 1992-10-13 1994-04-20 Matsushita Electric Industrial Co., Ltd. Method and apparatus for determining an air quality level
GB2280978A (en) * 1993-07-19 1995-02-15 Benedict Chaplin Spencer Portable temperature detector
US5428964A (en) * 1994-01-10 1995-07-04 Tec-Way Air Quality Products Inc. Control for air quality machine
US5394934A (en) * 1994-04-15 1995-03-07 American Standard Inc. Indoor air quality sensor and method
US5589824A (en) * 1995-11-09 1996-12-31 Lynch Adam Q Multi-sensor detection system
DE19700964A1 (en) * 1997-01-14 1998-07-16 Probst Max Josef Arrangement for air-conditioning of living rooms and buildings
JPH10213341A (en) * 1997-01-30 1998-08-11 Takenaka Komuten Co Ltd Air conditioning indoor controller
US5936532A (en) * 1998-06-16 1999-08-10 Peralta; David A. Smoke and carbon monoxide detector with clock
DE19855056A1 (en) * 1998-11-28 2000-05-31 Auma Tec Ausbau Umwelt Und Anl Intelligent system for ventilation of individual rooms with window mounted unit for radio controlled operational units
WO2001037231A2 (en) * 1999-11-17 2001-05-25 Simulation Systems And Applications, Inc. Carbon monoxide detector for air vehicles
DE10028333A1 (en) * 2000-06-05 2001-12-06 Bauer Armin Safety radio circuit layout for applying to electrically operated ventilator systems and exhauster hoods requires no cabling installations

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010047322A1 (en) * 2010-10-01 2012-04-05 Abb Ag Electrical installation device with a room air quality indicator
CN103454378A (en) * 2012-05-30 2013-12-18 张跃 Multifunctional air quality detector
CN112015215A (en) * 2019-05-31 2020-12-01 智达电小二(天津)科技有限公司 Automatic control system for intelligent classroom

Also Published As

Publication number Publication date
EP1546612A1 (en) 2005-06-29
AU2003271233A1 (en) 2004-04-19
NL1021562C2 (en) 2004-04-02

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