• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Device for measuring the concentration of ammonia gas continuously in a working atmosphere with permanent exposure. A probe (12) measures the concentration of ammonia in a receptacle (20) that houses it inside with an opening (11) to receive air from the working atmosphere. A cleaning unit (24) cleans the probe (1) by purging the air from the receptacle (20) and a control unit (14) alternately records a measurement of the probe (12) during a measurement interval and activates the unit of cleaning (24) during a cleaning interval. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2660061A1
    申请号:ES201631225
    申请日:2016-09-20
    公开日:2018-03-20
    发明作者:Manuel PORTELA GONZÁLEZ；Clarisa MOREIRA OURENS；Alberto BOUZÓN RIVAS
    申请人:Soluciones Globales De Informatica Aplicada S L；Soluciones Globales De Informatica Aplicada SL；
    IPC主号:
    专利说明:

    Technical Field of the Invention
    The present invention is part of the industrial control of working atmospheres and is related to the measurement of gases in general and particularly
    10 ammonia, in atmospheres where there is a permanent concentration of said gas, with application in general in any sector where working with atmospheres in which there is a permanent concentration of ammonia to be monitored. For example, in the agricultural and livestock sector and specifically in poultry farming.
    Background of the invention
    The state of the art from a commercial point of view is made up of the devices / elements developed by:
    20 Manufacturers of electrochemical ammonia measuring sensors, such as Nemoto or Figaro. The manufacturers of gas measurement equipment, including ammonia, which use the above sensors as the base measuring element. Dräger and Testo can be cited as an example.
    25 In the case of the manufacturers of electrochemical sensors all indicate that the sensor is aimed at the safety and human health sector since its usefulness is the timely detection of high levels of ammonia that may be toxic or harmful. Note the technical specifications of Nemoto in which indicate that the sensor has an active chemical agent
    30 which is consumed in the presence of ammonia, so the sensor's duration is greatly reduced if it is in contact with this substance continuously.


    With regard to the manufacturers of ammonia measuring equipment, all of them are logically within the safety and human health sector. Its function is the detection of ammonia levels in environments where it does not exist on a regular basis and to warn the carriers of the equipment that
    5 are in a risk zone. That is, the equipment is only in contact with this gas when there is a leak or a fault that causes its appearance and they never measure continuously in an environment with a permanent concentration of ammonia. On the other hand the problems in the use of these types of sensors for the
    10 measurement in environments with continued exposure to ammonia and in particular in poultry farms are mentioned in the scientific article “Method for Measuring Ammonia Emissions from Poultry Houses, Poultry Science Association, 2005” in which it is indicated that electrochemical sensors become saturated due to continuous exposure to atmospheres loaded with ammonia.
    On the other hand, in EP2860524 the problem of a prolonged measurement in time in an atmosphere with continued exposure to ammonia, in particular in animal stables, is again indicated, and the use of an ammonia retaining filter is proposed as a solution that it will be used in combination with the measurement of air without passing through said filter.
    In summary, the state of the art shows that electrochemical sensors for the measurement of ammonia are designed for the timely measurement of the presence of said gas and are not useful for continuous measurement in environments with permanent exposure, such as for example be the livestock production enclosures.
    Brief Description of the Invention
    The invention relates to a device that resolves the limitations observed in the state of the art. It incorporates a probe preferably
    Electrochemical for measuring ammonia continuously and repeatedly. It is therefore of special application in working atmospheres in which there is a permanent presence of said gas in varying concentrations.


    The device object of the present invention measures the concentration of ammonia in a working atmosphere and includes a probe to measure the concentration of ammonia in air, a receptacle that houses the probe and that provides an opening to receive the air from the atmosphere of job. 5 The device also includes a cleaning unit to clean the probe by purifying the receptacle air and a control unit to alternately record a measurement of the probe during a measurement interval and to activate the cleaning unit during a cleaning interval . In this way, the conditions for the probe to regenerate are restored.
    10 and measure again correctly.
    One of the working principles is therefore the combination of a measurement cycle in which the probe is in contact with the ammonia and a cycle in which the probe is in contact with air without the content of
    15 ammonia and that allows its cleaning. In the first cycle the probe performs the data collection of the atmosphere and in the second it does not perform it. Advantageously, these intervals or cycles are performed without having to transport the probe out of the measurement environment for cleaning and several situations can be distinguished:
    20 -The cleaning interval of the probe is carried out by the direct entry of outside air into the measurement enclosure through conduction and causing its entry through forced ventilation.
    - The cleaning interval of the probe is carried out by means of the action of compressed air cartridges incorporated in the equipment. 25 -The cleaning interval of the probe is carried out by performing vacuum
    around the sensor In addition, the above solutions are not exclusive and can be combined with each other according to the cleaning needs caused by the variation in ambient ammonia concentrations.
    30 In all situations described with the control unit, the duration of the cleaning and measuring intervals and their cadence can be defined and modified.


    Brief description of the figures
    In FIG. 1 describes the composition of elements of the measuring equipment with regeneration of the probe by means of outside air inlet without ammonia.
    5 In FIG. 2 the composition of the equipment with the use of pressurized air cartridges as a means of regeneration of the probe is described. In FIG. 3 describes the composition of the equipment with use of vacuum as a means of regeneration of the probe.
    10 Detailed description of the invention
    With reference to the preceding figures, various embodiments of the invention are described in greater detail and without limitation. In them you can see the clean air flows represented by the dotted arrow and the flow of
    15 air with ammonia using the striped arrow. Dotted lines indicate an interaction between elements.
    FIG. 1 shows a device 10 that incorporates a probe 12 into a receptacle 20 and a cleaning unit 24 that implements a clean air cleaning mechanism outside. The regeneration of the probe 12 is carried out
    20 by introducing clean outside air. For this, the control unit 14 commands an electrovalve 16 and a fan 18 that actuates together.
    Once the opening order has been given to the solenoid valve 16, the fan 18 forces the clean air inlet that displaces the air with ammonia surrounding
    25 the probe 12.
    When the opposite order is given, the solenoid valve 16 closes, the fan 18 stops and no clean outside air enters. At this time, the natural entry of the air with ammonia into the receptacle 20 in which the probe 12 is located is produced through a hole 11 and the measurement is made.
    30 FIG. 2 shows a device 10 incorporating a probe 12 in a receptacle 20 and a cleaning unit 24 with a compressed air cleaning mechanism. The regeneration of the probe is carried out by means of


    introduction of clean compressed air from a set of cartridges
    22. For this, the control unit 14 commands the opening / closing of said cartridges 22.
    Once the opening order of the cartridges 22 is given, compressed air 5 is introduced into the receptacle 20 of the probe 12 displacing the air with ammonia.
    When the cleaning is finished, the air intake with ammonia occurs naturally through a hole 11 and its measurement is performed.
    In this embodiment, the compressed air cartridges 22 are a consumable 10 that must be periodically renewed.
    FIG. 3 shows a device 10 incorporating a probe 12 and a cleaning unit 24 with a vacuum cleaning mechanism. The regeneration of the ammonia probe 12 is carried out by applying vacuum in the receptacle 20 in which said probe 12. is housed.
    15 control 14 commands the start / stop of a vacuum fan 19 which may or may not be reversible. This vacuum fan 19 must ensure the tightness of the receptacle 20 to allow the realization of said vacuum. The vacuum fan 19 is coupled to the receptacle 20 in which the probe 12 is housed without affecting its tightness.
    20 Once the vacuum fan 19 comes into operation, it extracts the air surrounding the ammonia probe 12, leaving it in contact with said gas.
    When the vacuum fan 19 stops or turns in the opposite direction, the air enters with ammonia and with it the measurement.
    25 Although described individually, the above embodiments are compatible with each other. For example, if the cleaning action by means of the outside air intake is not considered sufficient for a probe, pressure and / or vacuum air can be added.

    权利要求:
    Claims (7)
    [1]
    1. Device for measuring the concentration of ammonia gas in a work atmosphere comprising:
    5 -a probe (12) configured to measure the concentration of ammonia in air;
    - a receptacle (20) comprising an opening (11) for receiving air from the working atmosphere, where the receptacle (20) houses the probe (12);
    characterized in that it also includes:
    10 -a cleaning unit (24) configured to clean the probe (12) by purifying the air in the receptacle (20);
    - a control unit (14) configured to alternately register a measurement of the probe (12) during a measurement interval and to activate the cleaning unit (24) during a cleaning interval.
    [2]
    2. Device for measuring the concentration of ammonia gas according to claim 1, characterized in that the cleaning unit (24) comprises a fan (18) configured to introduce clean air into the receptacle (20) and an electrovalve (16) to activate said fan (18) during an interval
    20 cleaning.
    [3]
    3. Device for measuring the concentration of ammonia gas according to claim 1 or 2, characterized in that the cleaning unit (24) comprises at least one compressed air cartridge (22) controlled by the
    25 control unit (14) to open said cartridge (22) during a cleaning interval and introduce clean air into the receptacle (20).
    [4]
    4. Device for measuring the concentration of ammonia gas according to any one of claims 1 to 3, characterized in that the unit of

    cleaning (24) comprises a vacuum fan (19) that is tightly coupled with the receptacle (20) that houses the probe (12), and that is controlled by the control unit (14) to extract air from the probe (12) during a cleaning interval.
    [5]
    5. Device for measuring the concentration of ammonia gas according to claim 4, characterized in that the vacuum fan (19) is controlled by the control unit (14) to further introduce air from the working atmosphere into the probe (12) during a measurement range
    [6]
    6. Device for measuring the concentration of ammonia gas according to claim 5, characterized in that the vacuum fan (19) for introducing air from the working atmosphere into the probe (12) during a measurement interval reverses its rotation.
    [7]
    7. Device for measuring the concentration of ammonia gas according to any one of claims 1 to 6, characterized in that the probe (12) is electrochemical.

     Fig. 1 
     with ammonia
     Fig. 2

     with ammonia
    Fig. 3
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    同族专利:
    公开号 | 公开日
    ES2660061B1|2019-01-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20080093226A1|2005-10-27|2008-04-24|Mikhail Briman|Ammonia nanosensors, and environmental control system|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201631225A|ES2660061B1|2016-09-20|2016-09-20|Device for measuring the concentration of ammonia gas in a working atmosphere|ES201631225A| ES2660061B1|2016-09-20|2016-09-20|Device for measuring the concentration of ammonia gas in a working atmosphere|
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