EP0989373A2 - Dispositif pour produire une humidité relative déterminée dans l'air - Google Patents

Dispositif pour produire une humidité relative déterminée dans l'air Download PDF

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Publication number
EP0989373A2
EP0989373A2 EP99118774A EP99118774A EP0989373A2 EP 0989373 A2 EP0989373 A2 EP 0989373A2 EP 99118774 A EP99118774 A EP 99118774A EP 99118774 A EP99118774 A EP 99118774A EP 0989373 A2 EP0989373 A2 EP 0989373A2
Authority
EP
European Patent Office
Prior art keywords
chamber
valve unit
measuring chamber
saturation
connecting line
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP99118774A
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German (de)
English (en)
Other versions
EP0989373A3 (fr
EP0989373B1 (fr
Inventor
Helmut Dr. Mitter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
E&E Elektronik GmbH
Original Assignee
E&E Elektronik GmbH
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 E&E Elektronik GmbH filed Critical E&E Elektronik GmbH
Priority to AT99118774T priority Critical patent/ATE273488T1/de
Publication of EP0989373A2 publication Critical patent/EP0989373A2/fr
Publication of EP0989373A3 publication Critical patent/EP0989373A3/fr
Application granted granted Critical
Publication of EP0989373B1 publication Critical patent/EP0989373B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air

Definitions

  • the present invention relates to a device for generating a defined relative air humidity according to the preamble of claim 1.
  • Moisture generators These deliver defined relative air humidity values RH in a measuring chamber, in which in turn the moisture sensors to be calibrated or at least parts thereof can be arranged.
  • two-pressure / two-temperature humidity generators have also become known.
  • air saturated with water vapor is generated in a saturation chamber at a temperature T1 and a pressure p1 and then expanded to a pressure p2 at the temperature T2 in a measuring chamber.
  • the relative humidity in the measuring chamber can be determined or, in other words, by varying these parameters, the desired relative humidity RH can be set in a defined manner in the measuring chamber.
  • moisture generators about such moisture generators is about the publication Humidity Sensing, Measurements and Calibration Standards "by PH Huang in Sensors, Feb. 1990, pages 12-21.
  • the problem with moisture generators constructed in this way is now the relatively large outlay in terms of equipment, in particular to accomplish temperature control, temperature measurement and temperature stabilization. A less complex modification of such a moisture generator is now a so-called pure two-pressure generator.
  • the temperature in the saturation chamber as well as in the measuring chamber is kept the same by suitable measures and the desired relative humidity RH only by varying the pressure conditions in the Saturation chamber and the measuring chamber set.
  • moisture generator types reference is made, for example, to JP 09-257283.
  • the object of the present invention is therefore to be as compact as possible simply constructed device for generating a defined relative To create humidity, in particular the problems mentioned above be avoided when displaying moisture.
  • the measures according to the invention now ensure an extreme compact and simply constructed device for generating a defined relative humidity.
  • the ones mentioned above can also be used Problems related to the condensation of saturated air in the Avoid area of the connecting line or valve unit safely.
  • the measures in the dependent claims ensure that a constant relative humidity values to be displayed in the entire range Gas flow into the measuring chamber results. So fluctuates from the above Document known device with varying relative humidity values the gas flow in the measuring chamber. However, there is a constant gas flow advantageous in terms of the overall accuracy of the system.
  • a device has thus been created which can be varied simply the pressure conditions in the two chambers to produce a desired relative humidity RH enables.
  • the expenditure on equipment was significantly reduced compared to known moisture generators, so that ultimately results in a system that can also be easily transported is.
  • the invention Measures used in a so-called two-pressure generator; basically is possible, however, also in the two-pressure / two-temperature humidity generators mentioned to implement these measures.
  • the device according to the invention for generating a defined relative air humidity in this exemplary embodiment essentially consists of a single structural unit in which both the saturation chamber 1 and the actual measuring chamber 2 are arranged.
  • the complete assembly is made of a material with high thermal conductivity. Aluminum, for example, is suitable for this.
  • the saturation chamber 1 is fed on the inlet side via a feed line 3, for example air under excess pressure p.
  • the desired pressure p1 is set in the saturation chamber 1 by means of a reducing valve 12, p1 ⁇ p.
  • In the saturation chamber 1 there is water 1.1, which serves to saturate the introduced air or possibly nitrogen to the relative humidity RH 100%.
  • the air is passed into the actual measuring chamber 2 via a connecting line consisting of two sections 4.1, 4.2 and a valve unit 5.
  • the measuring chamber 2 is in turn connected to the environment via an open supply line 2.1, ie ultimately a pressure p2 is established in the measuring chamber 2 which corresponds to the ambient pressure p a .
  • the defined setting of the pressure ratio p2 / p1 can be used in the Measuring chamber 2 represent the desired relative humidity RH.
  • the measuring chamber 2 can then, for example, moisture sensors or at least Arrange parts of it to be calibrated.
  • the described The exemplary embodiment accordingly represents a two-pressure moisture generator dar;
  • the measures according to the invention can also be used in other types of moisture generators.
  • K represents an empirically determinable, constant real gas factor.
  • the output signals of the two pressure measurement units 8, 9 are fed to an operating unit 7 for evaluation or further processing, in which the relative humidity RH is determined via the above-mentioned relationship and is shown in a display area 7.1.
  • the operating unit 7 comprises an operating element 7.2, which is used to set the desired relative humidity RH in the measuring chamber 1.
  • the control element 7.2 ultimately acts on the reducing valve 12 in order to set the pressure p1 in such a way defined that the air is saturated in the saturation chamber.
  • the desired defined setting of the relative humidity RH in the measuring chamber 2 is obtained by setting the pressure p1 and thus ultimately the pressure ratio p2 / p1.
  • a corresponding signal connecting line between the control unit 7 and the reducing valve 12 is also shown schematically in FIG indicated.
  • FIG. 1 is schematic in the device according to the invention indicated heater 6 provided in thermal Contact with certain parts of the device.
  • the heating device 6 on the one hand in thermal contact with the section 4.1 the connecting line between saturation chamber 1 and measuring chamber 2, which extends from the saturation chamber 1 to the valve unit 5.
  • the heating device 6 is also in thermal contact with others the valve unit 5.
  • Further details on the invention arranged heating device 6 are subsequently based on the Figures 2a and 2b explained.
  • FIG. 2a shows a partial view of the embodiment of Figure 1 with a more detailed representation of the heating device 6;
  • FIG. 2b shows an electrical circuit diagram of this heating device 6.
  • the section 4.1 of the connecting line between the saturation chamber 1 and the measuring chamber including the schematically indicated valve unit 5 can be seen.
  • the heating device essentially consists of a current-carrying resistance wire, which in turn comprises two sections 6.1a, 6.1b.
  • the first section 6.1a of the resistance wire is arranged wound around the connecting line 4.1 in the area between the saturation chamber 1 and the valve unit 5.
  • the winding of the resistance wire 6.1a in this area of the connecting line was chosen such that approximately half the length of the resistance wire 6.1a was arranged in the first third of the connecting line 4.1, starting with the saturation chamber 1.
  • the second section 6.1b of the resistance wire is arranged wound around the valve unit 5.
  • an operating element 5.3 can also be seen from the valve unit 5, via which the desired gas flow into the measuring chamber 2 can optionally be set.
  • insulation 13 is arranged in each case. This is used for thermal insulation these areas or the heating device 6 with respect to the environment.
  • Insulation can, for example, commercially available PU foam or other commercially available, prefabricated pipe insulation can be provided.
  • the two resistance wires 6.1a, 6.1b of the heating device are connected in series in the exemplary embodiment shown and have contacts U V , GND for connection to a suitable supply voltage.
  • a contact U M is also provided between the two resistance wires 6.1a, 6.1b, via which a control voltage can be tapped and is therefore used to check the function of the heating device.
  • the associated electrical equivalent circuit diagram for the exemplary embodiment of a heating device shown is shown in FIG. 2b. In one possible embodiment, an electrical resistance of 100 ⁇ was selected in each of the two resistance wires 6.1a, 6.1b.
  • the supply voltage at contact U V is 24V; in this exemplary embodiment, the heating device is consequently designed as a simple constant power control.
  • Such a dimensioning or design of the heating device can achieve a heating of approximately 5-7 ° C. in the area 4.1 of the connecting line and in the area of the valve unit 5, which is independent of the respective ambient temperature.
  • the temperature in these areas is thus at least slightly above the dew point temperature of the air saturated in the saturation chamber. Condensation of the highly saturated air coming from the saturation chamber can be reliably prevented by these measures in these areas of the device according to the invention.
  • valve unit 5 A detailed view of the valve unit 5 is shown in FIG. 3. Here was for clarity on the representation of the heating device waived.
  • the valve unit 5 in the present invention preferably includes one arranged on the input side, so-called differential pressure regulator 5.1, which has a needle valve 5.2 is subordinate, further in the embodiment shown includes an adjusting element 5.3.
  • the setting element 5.3 of the needle valve 5.2 can be used to generate a desired gas flow in the Adjust the measuring chamber.
  • the differential pressure regulator 5.1 arranged on the input side in the valve unit 5 now keeps the air pressure p z reaching the needle valve 5.2 and thus the air flow in the measuring chamber constant, regardless of fluctuations in the air pressure p1 in the saturation chamber 1 on the input side.
  • An intermediate pressure p z is set here for the needle valve 5.2, which is approximately 150 mbar above the pressure p 2; the intermediate pressure p z is kept constant.
  • the gas is expanded or expanded from p z to p2, p2 generally corresponding to the ambient pressure.
  • Suitable differential pressure regulators 5.1 are, for example, from Fischer & Porter under the name Differential pressure regulator series 53R_2110 "available.
  • the valve unit 5 consists of a differential pressure regulator 5.1, a needle valve 5.2 and, if appropriate, an adjusting device for the needle valve 5.3.
  • a differential pressure regulator 5.1 By means of 5.1 in the connecting line between 5.1 u. 5.2 an intermediate pressure p z of approximately 150 mbar above p2 is set and kept constant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Control Of Non-Electrical Variables (AREA)
EP99118774A 1998-09-25 1999-09-23 Dispositif pour produire une humidité relative déterminée dans l'air Expired - Lifetime EP0989373B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT99118774T ATE273488T1 (de) 1998-09-25 1999-09-23 Vorrichtung zur erzeugung einer definierten relativen luftfeuchte

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0062298U AT3403U1 (de) 1998-09-25 1998-09-25 Vorrichtung zur erzeugung einer definierten relativen luftfeuchte
AT62298U 1998-09-25

Publications (3)

Publication Number Publication Date
EP0989373A2 true EP0989373A2 (fr) 2000-03-29
EP0989373A3 EP0989373A3 (fr) 2002-07-24
EP0989373B1 EP0989373B1 (fr) 2004-08-11

Family

ID=3495478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99118774A Expired - Lifetime EP0989373B1 (fr) 1998-09-25 1999-09-23 Dispositif pour produire une humidité relative déterminée dans l'air

Country Status (5)

Country Link
US (1) US6299147B1 (fr)
EP (1) EP0989373B1 (fr)
JP (1) JP2000112534A (fr)
AT (2) AT3403U1 (fr)
DE (1) DE59910183D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10203637A1 (de) * 2002-01-30 2003-08-21 Testo Gmbh & Co Verfahren und Vorrichtung zur Kalibrierung eines Feuchtesensors sowie Sensoranordnung mit einem kalibrierbaren Feuchtesensor
DE10232172A1 (de) * 2002-07-16 2004-02-12 Proteros Biostructures Gmbh Vorrichtung und Verfahren zur Erzeugung einer definierten Umgebung für partikelförmige Proben
EP1624356A1 (fr) 2004-08-04 2006-02-08 E + E Elektronik Gesellschaft M.B.H. Appareil pour générer des références d'humidité relative
CN101118241B (zh) * 2006-07-31 2012-05-16 陈坚 温湿度检定箱缩短高温高湿度平衡时间的方法及装置
DE112011100765B4 (de) * 2011-01-19 2013-06-20 Sichuan Electric Power Research Institute Kalibriervorrichtung für Online-Schwefelhexafluorid-Feuchtigkeitsmessgeräte und zugehöriges Kalibrierverfahren

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6863268B2 (en) * 2001-11-27 2005-03-08 Chaojiong Zhang Dew point humidifier (DPH) and related gas temperature control
US6712504B1 (en) * 2002-10-01 2004-03-30 Forintek Canada Corp. Method for determining the relative humidity of a volume of air having a temperature of 100° C or greater
US6988717B2 (en) * 2003-12-15 2006-01-24 Chemflow Systems, Inc. Method and system for near saturation humidification of a gas flow
DE102005012373B4 (de) * 2005-03-17 2007-11-15 Thermo Electron Led Gmbh Verfahren zur Kalibrierung von Feuchtesensoren in Klimageräten und Klimagerät
FI20050530A (fi) * 2005-05-18 2006-11-19 Vaisala Oyj Menetelmä ja laitteisto suhteellisen pitoisuuden mittauksen kalibroimiseksi
DE202005013613U1 (de) * 2005-08-29 2005-11-10 Testo Ag Vorrichtung zur Kalibrierung eines Feuchtesensors sowie Sensoranordnung mit einem kalibrierbaren Feuchtesensor
US20070107500A1 (en) * 2005-11-16 2007-05-17 Neha Patel Sensing moisture uptake of package polymers
US8069690B2 (en) * 2005-12-16 2011-12-06 Ofs Fitel, Llc Apparatus and method for fabricating glass bodies using an aerosol delivery system
US20100201006A1 (en) 2009-02-12 2010-08-12 Lee Ron C Method and apparatus for stable and adjustable gas humidification
CN101794158B (zh) * 2010-03-26 2013-05-08 上海市计量测试技术研究院 一种湿度发生器的气体压力和流量控制装置
US9803590B2 (en) * 2013-02-22 2017-10-31 Ford Global Technologies, Llc Humidity sensor diagnostics
DE102016003172A1 (de) 2016-03-16 2017-09-21 W. O. M. World of Medicine GmbH lnsufflationsschlauch für die Laparoskopie mit Heizelement, Befeuchtungsmittel und Vorrichtung zur Bestimmung des Feuchtigkeitsgehaltes
WO2020184496A1 (fr) * 2019-03-08 2020-09-17 Ball Wave Inc. Système, procédé et programme d'étalonnage d'un capteur d'humidité

Citations (1)

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Publication number Priority date Publication date Assignee Title
JPH09257283A (ja) 1996-03-22 1997-09-30 Chino Corp 湿度発生装置

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JPH08140695A (ja) * 1994-11-25 1996-06-04 Yaegaki Hakko Giken Kk 培養菌体からのアスタキサンチンの分離・精製方法
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JPH09257283A (ja) 1996-03-22 1997-09-30 Chino Corp 湿度発生装置

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10203637A1 (de) * 2002-01-30 2003-08-21 Testo Gmbh & Co Verfahren und Vorrichtung zur Kalibrierung eines Feuchtesensors sowie Sensoranordnung mit einem kalibrierbaren Feuchtesensor
DE10203637B4 (de) * 2002-01-30 2004-09-16 Testo Ag Verfahren und Vorrichtung zur Kalibrierung eines Feuchtesensors
DE10232172A1 (de) * 2002-07-16 2004-02-12 Proteros Biostructures Gmbh Vorrichtung und Verfahren zur Erzeugung einer definierten Umgebung für partikelförmige Proben
DE10232172B4 (de) * 2002-07-16 2005-03-10 Proteros Biostructures Gmbh Vorrichtung und Verfahren zur Erzeugung einer definierten Umgebung für partikelförmige Proben
US7281669B2 (en) 2002-07-16 2007-10-16 Proteros Biostructures Gmbh Apparatus and method for generating a defined environment for particle-shaped samples
EP1624356A1 (fr) 2004-08-04 2006-02-08 E + E Elektronik Gesellschaft M.B.H. Appareil pour générer des références d'humidité relative
US7395673B2 (en) 2004-08-04 2008-07-08 E + E Elektronik Ges. M.B.H. Device for creating a reference humidity
CN101118241B (zh) * 2006-07-31 2012-05-16 陈坚 温湿度检定箱缩短高温高湿度平衡时间的方法及装置
DE112011100765B4 (de) * 2011-01-19 2013-06-20 Sichuan Electric Power Research Institute Kalibriervorrichtung für Online-Schwefelhexafluorid-Feuchtigkeitsmessgeräte und zugehöriges Kalibrierverfahren

Also Published As

Publication number Publication date
EP0989373A3 (fr) 2002-07-24
JP2000112534A (ja) 2000-04-21
ATE273488T1 (de) 2004-08-15
EP0989373B1 (fr) 2004-08-11
US6299147B1 (en) 2001-10-09
DE59910183D1 (de) 2004-09-16
AT3403U1 (de) 2000-02-25

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