WO2013045572A1 - Dispositif de mesure de niveau pour humidificateur d'air inhalé - Google Patents

Dispositif de mesure de niveau pour humidificateur d'air inhalé Download PDF

Info

Publication number
WO2013045572A1
WO2013045572A1 PCT/EP2012/069120 EP2012069120W WO2013045572A1 WO 2013045572 A1 WO2013045572 A1 WO 2013045572A1 EP 2012069120 W EP2012069120 W EP 2012069120W WO 2013045572 A1 WO2013045572 A1 WO 2013045572A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid container
electrode
measuring device
wall
level
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.)
Ceased
Application number
PCT/EP2012/069120
Other languages
German (de)
English (en)
Inventor
Rudolf BÜCHI
Marc MAEDER
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.)
Hamilton Bonaduz AG
Original Assignee
Hamilton Bonaduz AG
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 Hamilton Bonaduz AG filed Critical Hamilton Bonaduz AG
Publication of WO2013045572A1 publication Critical patent/WO2013045572A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/268—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/109—Preparation of respiratory gases or vapours by influencing the temperature the humidifying liquid or the beneficial agent
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3317—Electromagnetic, inductive or dielectric measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
    • A61M2205/3389—Continuous level detection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/50—General characteristics of the apparatus with microprocessors or computers
    • A61M2205/502—User interfaces, e.g. screens or keyboards

Definitions

  • the present invention relates to a level measuring device for breathing humidifier when breathing patients with breathing gas, and more particularly to a humidifier with a capacitive level measuring device.
  • the patient to be ventilated is pneumatically connected to the ventilator using a breathing circuit. Since the respiratory gas supplied to the patient must be adjusted in temperature and humidity to the physiological requirements of the patient, a humidifier is placed in the inspiratory or inspiratory tube which warms and moistens the respiratory gas.
  • the humidifier has a liquid container filled with distilled water, through which the inhaled gas is passed and enriched with moisture.
  • the heating of the liquid in the liquid container via a heating plate in the lower portion of the housing of the humidifier, wherein the heat is thermally transferred from the heating plate to the heat-conductive bottom of the liquid container. So that the liquid container does not run dry, the level in the liquid container is monitored.
  • a hose is passed from above into the liquid container, to the lowest permissible level.
  • On this hose there is a float valve, which opens the valve seat when a liquid level falls below a certain level and releases the supply of liquid from the external reservoir until a maximum permissible level is reached. Then the float valve blocks the further supply of liquid from the external reservoir.
  • the contactless capacitive level measurement in vessels is known in principle, for. Example from WO 2006/000378 A1.
  • electrodes are applied from the outside to a vessel made of non-electrically conductive material, for example, glued or produced by applying by means of a conductive plastic.
  • High-frequency alternating voltage is supplied via one or more transmitting electrodes, which causes capacitive currents in at least one further electrode designed as a receiving electrode.
  • the electric field reaches through the vessel wall and the medium in the vessel. Since most media have a dielectric constant different from 1, the filling of the vessel leads to an increase in the capacitance between the electrodes and thus to a proportional increase in the current amplitude, which can be evaluated as a measurement signal.
  • the GB 2 358 789 A discloses a non-contact level measurement in a kettle or kettle, in which two parallel electrodes are mounted in the fill level outside on a Kunststoffbeh older.
  • the measuring signal is passed to a control device which controls the function of the kettle accordingly.
  • a level measuring device for a humidifier having a liquid container with a bottom plate and a housing with a heating plate, wherein for heating the liquid in the liquid container, the heating plate can be heated and the bottom plate can be brought into contact with the heating plate.
  • the level measuring device is characterized in that, for capacitive measurement of the liquid level in the liquid container, it has a first electrode and a second electrode, each connected to an AC voltage source, and a measuring device adapted to measure the capacitance between the first electrode and the first electrode second housing, wherein the housing has a first wall which is substantially adjacent to a second wall of the liquid container, wherein the bottom plate is provided as a first electrode and the second electrode is arranged on the first wall, that it the second Wall of the liquid container opposite. Because the bottom plate of the liquid container usually made of very good electrically and thermally conductive metal such. As aluminum is formed, it can serve as a first electrode in the capacitive measurement of the level without an additional components would be required.
  • the level measuring device Although an additional function for the humidifier is provided with the level measuring device according to the invention, a change in the structure of the liquid container is not necessary. Furthermore, the current level can be transmitted at any time to a control device of the humidifier, there displayed and evaluated. Since the bottom plate as the first electrode has a very large area, it is possible that the second electrode may extend on the first wall over a relatively large area. This also allows a large area for the second electrode, whereby the capacity and with it also the measuring range of the capacity between the filled and empty liquid container relatively large. This allows more accurate measurement results.
  • the second electrode is preferably arranged on the first wall in such a way that it extends over the height of all fill levels to be expected in the liquid container.
  • the level measuring device may comprise a plurality of second electrodes, which are arranged on the first wall such that the plurality of second electrodes are distributed over the height of all to be expected in the liquid container levels. In both cases, the arrangement increases the accuracy of the measurement.
  • the first wall and the second wall are arranged substantially parallel to each other. This simplifies the measurement and calibration of the level gauges. Since the numbers of electrons of the materials of the first wall, the second wall and the gap are constant over the entire area of the second electrode. Decisive therefore is essentially only the level of the liquid. It is advantageous if the first wall and the second wall are arranged substantially perpendicular to the bottom plate. This results in a simple construction.
  • the bottom plate is grounded. This is used for interference immunity by high-frequency interference signals. Since the bottom plate is firmly pressed in the operating state of the humidifier on the heating plate of the housing and is formed of electrically conductive material, it is at the same potential as the heating plate and thereby the grounding of the bottom plate can be effected by the grounding of the heating plate. This can be used on existing components for grounding the bottom plate. Particularly effective is the heating effect when the bottom plate and the heating plate are flat and each having a substantially equal contact surface. It is preferred that the bottom plate made of aluminum and the second electrode are formed of copper. It is further preferred that the second electrode extends substantially across the width of the liquid container.
  • a humidifier with a housing, a liquid container and a level measuring device as defined above, wherein the humidifier has a control device, in which the measuring device is integrated and which is adapted to determine the level in the liquid container from the measured capacitance.
  • the control device can then at any time transmit the fill level measurement signal, for example, to a user interface which displays a corresponding fill level value on a display device. It is also advantageous that the control device is suitable for outputting an optical or acoustic signal for the user at certain level values.
  • Fig. 1 shows a perspective view of a housing of a humidifier with a preferred embodiment of the level measuring device according to the invention
  • FIG. 2 shows a perspective view of a liquid container of a respiratory humidifier with a fill level measuring device according to the invention of the preferred embodiment
  • Fig. 3 is a schematic side view of a liquid container
  • FIG. 4 shows a schematic representation of the functional principle of the present invention
  • FIG. 5 shows a perspective cross-sectional view of a portion of a humidifier according to a preferred embodiment of the present invention.
  • the housing 2 has a substantially L-shape with a horizontal leg 4 and a vertical leg 6.
  • a heating plate 8 is arranged, which is oriented substantially horizontally and covers almost the entire surface of the horizontal leg 4.
  • the inclined surface comprises a user interface 12.
  • the user interface 12 has a display device 14 and operating elements 16, by means of which and a control device (not shown) the respiratory humidifier can be monitored and controlled.
  • electrical contact elements 18 are respectively arranged at the upper end of the vertical leg 6 and can be brought into electrical contact with corresponding connecting pieces of a ventilation hose system.
  • the arrow in FIG. 1 indicates the insertion direction for the liquid container, which has a shape which is substantially complementary to the projection-like section 10 of the housing 2 is.
  • the liquid container 3 of the humidifier, which has a preferred embodiment of the level measuring device according to the invention.
  • the liquid container 3 each have a connection element 5, which is designed as a pipe socket with a circular cross-section for pneumatic connection to a breathing circuit. Between the two connection elements 5, the liquid container 3 has a recess or a cutout 7. Furthermore, a refill hose 10 can be connected to the cover surface of the liquid container 3.
  • Fig. 3 shows a schematic side view of the liquid container 3 with the elements of the level measuring device according to the invention.
  • the bottom plate 11 of the liquid container 3 is designed as a first electrode, and a second electrode 13 is here arranged schematically perpendicular to the bottom plate 11. It should be noted that in the present invention, the second electrode 13 is not disposed directly on the first wall 15 of the liquid container 3 as shown in FIG. 3, but on the second wall 27 of the housing 2 (not shown in FIG. 3).
  • the illustration in FIG. 3 therefore has a purely illustrative character.
  • a liquid 17, for example, normal or distilled water which extends to a marked with the wavy line 19 level 21.
  • the dashed line 23 is the lower course of the section 7 shown in Fig. 2 again and determines the maximum level height 25 for the liquid 17.
  • the respiratory gas flow in operation no longer wets the maximum surface of the liquid 17th and therefore the function of the humidifier is further limited. The respiratory gas flow is then no longer the largest possible liquid surface available for moisture absorption.
  • Fig. 4 the functional principle of the capacitive level measurement is shown schematically in the level measuring device according to the invention.
  • the standing with the heating plate 8 in complete electrical contact bottom plate 11 forms the first electrode.
  • An AC voltage source 20 is connected to this first electrode via a line 22, and the other end of the lead 22 is connected to the second electrode 13. Similar to Fig. 3, in Fig. 4, the first and second walls are not shown for the sake of simplicity.
  • the first electrode 11 is supplied by the AC voltage source 20 via the line 22, a high-frequency AC voltage, which causes capacitive currents in the second electrode 13, which can be detected for example by a measuring device in the line 22.
  • the magnitude of the capacitive currents in the second electrode 13 is determined by the electrical properties, in particular the dielectric constant, of the substances that are physically present between the first electrode 1 1 and second electrode 13 and are detected by the high-frequency alternating electric field.
  • the capacity 24 is representative of the capacity of the substances between the electrodes.
  • the liquid 17 extends in the liquid container 3 to the filling level 21, and because, for example, water 17 has a different dielectric constant than liquid 17, a higher filling level 21 leads to an increase in the capacitance 24 between the two electrodes 8, 13 and thus to one proportional increase in the measurable amplitude of the capacitive currents. In an analogous manner, a lower fill level leads to a smaller capacity 24 and thus to a drop in the measurable current amplitude.
  • FIG. 5 shows a perspective cross-sectional view of a respiratory humidifier with a preferred embodiment of the level measuring device according to the invention.
  • the liquid container 3 is completely inserted, as indicated by the arrow in Fig. 1.
  • the bottom plate or first electrode 11 rests completely on the heating plate 8 of the housing 2 and is in complete thermal and electrical contact with it.
  • the base plate 11 adjoins the second wall 15 of the liquid container 3 in the area shown on the right in FIG. 5, and this second wall 15 is flat and parallel to the first wall 27 of the housing 2 over a larger portion.
  • the first wall 27 and the second wall 15 face each other so close to each other that only a thinnest possible air gap is formed therebetween, the dielectric properties of which are taken into account in the level measurement.
  • the second electrode 13 is arranged on the surface of the first wall 27, which is directed into the interior of the housing 2 and is perpendicular to the heating plate 8, in such a way that it likewise acts in the direction of the wall. sentlichen and parallel to the second wall 15 of the liquid container 3 extends.
  • the width of the electrode 13 extends substantially over the height of all in the liquid container expected levels up to the maximum level height 25. Thus, each level value can be continuously measured.
  • the electronic components of the filling level measuring device according to the invention are for example integrated in the control device, preferably on the same printed circuit board.
  • the measuring device may preferably be an application-specific integrated circuit (ASIC) which is arranged on the main circuit board of the control device.
  • ASICs are mass-produced and therefore cost-effective, simple and flexible.
  • the humidifier also includes a controller to which the level gauge continuously supplies the values of its measurements.
  • the control device is suitable for displaying the measured values on the user interface 12 or the display device 14 and outputting acoustic or optical signals when the limit values fall below or exceed predetermined limits.
  • a level measuring device for a humidifier which can accurately measure the level in the liquid container at any time, can provide the measured value immediately for evaluation and display and manages without additional components in the liquid container.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Air Humidification (AREA)

Abstract

Dispositif de mesure de niveau pour humidificateur d'air inhalé, qui comporte un réservoir à liquide (3) pourvu d'une plaque de fond (11) et un boîtier (2) pourvu d'une plaque de chauffe (8), la plaque de chauffe (8) pouvant être chauffée pour chauffer le liquide présent dans le réservoir à liquide (3), et la plaque de fond (11) pouvant être mise en contact avec la plaque de chauffe (8). Ledit dispositif est caractérisé en ce qu'il comporte, pour la mesure capacitive du niveau de liquide dans le réservoir à liquide (3), une première électrode (11) et une seconde électrode (13) connectées toutes les deux à une source de tension alternative (20), et un dispositif de mesure approprié pour mesurer la capacité entre la première électrode (11) et la seconde électrode (13), le boîtier (2) comportant une première paroi (27) qui est sensiblement adjacente à une seconde paroi (15) du réservoir à liquide (3), la plaque de fond (11) étant conçue en tant que première électrode (11), et la seconde électrode (13) étant fixée sur la première paroi (27) de manière telle qu'elle se trouve à l'opposé de la seconde paroi (15) du réservoir à liquide (3).
PCT/EP2012/069120 2011-10-01 2012-09-27 Dispositif de mesure de niveau pour humidificateur d'air inhalé Ceased WO2013045572A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011054133A DE102011054133A1 (de) 2011-10-01 2011-10-01 Füllstandsmessvorrichtung für Atemluftbefeuchter
DE102011054133.0 2011-10-01

Publications (1)

Publication Number Publication Date
WO2013045572A1 true WO2013045572A1 (fr) 2013-04-04

Family

ID=47008577

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/069120 Ceased WO2013045572A1 (fr) 2011-10-01 2012-09-27 Dispositif de mesure de niveau pour humidificateur d'air inhalé

Country Status (2)

Country Link
DE (1) DE102011054133A1 (fr)
WO (1) WO2013045572A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185589A1 (fr) * 2014-06-05 2015-12-10 BSH Hausgeräte GmbH Évaporateur
US9987455B2 (en) 2012-03-15 2018-06-05 Fisher & Paykel Healthcare Limited Respiratory gas humidification system
CN111795733A (zh) * 2019-09-07 2020-10-20 孙中一 一种蒸发传感器
US10828482B2 (en) 2013-12-20 2020-11-10 Fisher & Paykel Healthcare Limited Humidification system connections
US11129956B2 (en) 2012-04-27 2021-09-28 Fisher & Paykel Healthcare Limited Usability features for respiratory humidification system
US11324911B2 (en) 2014-06-03 2022-05-10 Fisher & Paykel Healthcare Limited Flow mixers for respiratory therapy systems
US11351332B2 (en) 2016-12-07 2022-06-07 Fisher & Paykel Healthcare Limited Sensing arrangements for medical devices
US11559653B2 (en) 2014-02-07 2023-01-24 Fisher & Paykel Healthcare Limited Respiratory humidification system
US11801360B2 (en) 2013-09-13 2023-10-31 Fisher & Paykel Healthcare Limited Connections for humidification system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2120407A1 (de) * 1970-04-27 1971-12-09 Drexelbrook Controls HF System zur Messung von Material mveaus
US5017909A (en) 1989-01-06 1991-05-21 Standex International Corporation Capacitive liquid level sensor
GB2261952A (en) * 1991-11-27 1993-06-02 Langston Corp Fluid level detection system
GB2358789A (en) 2000-02-07 2001-08-08 Otter Controls Ltd Liquid heating device with excessive or insufficient water level protection means.
EP1479404A2 (fr) * 2003-05-19 2004-11-24 Weinmann Geräte für Medizin GmbH & Co. KG Procédé et dispositif de distribution de gaz respirable
WO2006000378A2 (fr) 2004-06-25 2006-01-05 Accelab Gmbh Mesure capacitive et sans contact d'un niveau de remplissage
DE102006033204A1 (de) 2006-07-18 2008-01-24 Rawe Electronic Gmbh Füllstandssensor für Fluide und/oder Schüttgüter
DE102007022873A1 (de) * 2007-05-14 2008-11-20 Samsung SDI Co., Ltd., Suwon Kapazitiver Flüssigkeitsstanddetektor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4967673B2 (ja) * 2007-01-16 2012-07-04 パナソニック株式会社 電気機器の液体容器
ITRM20080132A1 (it) * 2008-03-11 2009-09-12 I R C A S P A Industria Resistenz E Corazzate Evaporatore di fluidi di condensa
EP2340867B1 (fr) * 2009-12-30 2013-05-15 Deas S.R.L. Une chambre d'humidification avec un capteur de sécurité pour détecter un niveau excessif de liquide

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2120407A1 (de) * 1970-04-27 1971-12-09 Drexelbrook Controls HF System zur Messung von Material mveaus
US5017909A (en) 1989-01-06 1991-05-21 Standex International Corporation Capacitive liquid level sensor
GB2261952A (en) * 1991-11-27 1993-06-02 Langston Corp Fluid level detection system
GB2358789A (en) 2000-02-07 2001-08-08 Otter Controls Ltd Liquid heating device with excessive or insufficient water level protection means.
EP1479404A2 (fr) * 2003-05-19 2004-11-24 Weinmann Geräte für Medizin GmbH & Co. KG Procédé et dispositif de distribution de gaz respirable
WO2006000378A2 (fr) 2004-06-25 2006-01-05 Accelab Gmbh Mesure capacitive et sans contact d'un niveau de remplissage
DE102006033204A1 (de) 2006-07-18 2008-01-24 Rawe Electronic Gmbh Füllstandssensor für Fluide und/oder Schüttgüter
DE102007022873A1 (de) * 2007-05-14 2008-11-20 Samsung SDI Co., Ltd., Suwon Kapazitiver Flüssigkeitsstanddetektor

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12350436B2 (en) 2012-03-15 2025-07-08 Fisher & Paykel Healthcare Limited Respiratory gas humidification system
US9987455B2 (en) 2012-03-15 2018-06-05 Fisher & Paykel Healthcare Limited Respiratory gas humidification system
US10974015B2 (en) 2012-03-15 2021-04-13 Fisher & Paykel Healthcare Limited Respiratory gas humidification system
US11878093B2 (en) 2012-04-27 2024-01-23 Fisher & Paykel Healthcare Limited Usability features for respiratory humidification system
US11129956B2 (en) 2012-04-27 2021-09-28 Fisher & Paykel Healthcare Limited Usability features for respiratory humidification system
US12515008B2 (en) 2013-09-13 2026-01-06 Fisher & Paykel Healthcare Limited Connections for humidification system
US11801360B2 (en) 2013-09-13 2023-10-31 Fisher & Paykel Healthcare Limited Connections for humidification system
US11826538B2 (en) 2013-12-20 2023-11-28 Fisher & Paykel Healthcare Limited Humidification system connections
US10828482B2 (en) 2013-12-20 2020-11-10 Fisher & Paykel Healthcare Limited Humidification system connections
US11559653B2 (en) 2014-02-07 2023-01-24 Fisher & Paykel Healthcare Limited Respiratory humidification system
US12397127B2 (en) 2014-02-07 2025-08-26 Fisher & Paykel Healthcare Limited Respiratory humidification system
US11712536B2 (en) 2014-06-03 2023-08-01 Fisher & Paykel Healthcare Limited Flow mixers for respiratory therapy systems
US11324911B2 (en) 2014-06-03 2022-05-10 Fisher & Paykel Healthcare Limited Flow mixers for respiratory therapy systems
WO2015185589A1 (fr) * 2014-06-05 2015-12-10 BSH Hausgeräte GmbH Évaporateur
CN106461205B (zh) * 2014-06-05 2019-11-08 Bsh家用电器有限公司 蒸发器
US20170108209A1 (en) * 2014-06-05 2017-04-20 BSH Hausgeräte GmbH Evaporator
CN106461205A (zh) * 2014-06-05 2017-02-22 Bsh家用电器有限公司 蒸发器
US11351332B2 (en) 2016-12-07 2022-06-07 Fisher & Paykel Healthcare Limited Sensing arrangements for medical devices
US12508391B2 (en) 2016-12-07 2025-12-30 Fisher & Paykel Healthcare Limited Sensing arrangements for medical devices
CN111795733A (zh) * 2019-09-07 2020-10-20 孙中一 一种蒸发传感器

Also Published As

Publication number Publication date
DE102011054133A1 (de) 2013-04-04

Similar Documents

Publication Publication Date Title
WO2013045572A1 (fr) Dispositif de mesure de niveau pour humidificateur d'air inhalé
DE102010001993B4 (de) Magnetisch-induktives Durchflussmessgerät
DE4338687C1 (de) Urinmeßgerät und Verfahren zum Ermitteln der Dichte von Urin
EP3152530B1 (fr) Procédé et dispositif de surveillance du niveau d'un milieu dans un récipient
WO2003066133A1 (fr) Cloche de tire-lait
DE102020112151B4 (de) Magnetisch-induktive Durchflussmesssonde und Verfahren zum Ermitteln eines Füllstandes
EP3080563B1 (fr) Dispositif permettant de mesurer le niveau d'un produit de remplissage dans un contenant
EP1556670A1 (fr) Debitmetre a tourbillons
WO2006094576A1 (fr) Systeme de tuyauterie pouvant etre chauffe
EP1514500B1 (fr) Appareil de préparation de boisson
DE10063557A1 (de) Verfahren und Vorrichtung zum Messen von Pegelständen
TWM313774U (en) Solution admeasurement sensing device
WO2020126274A1 (fr) Débitmètre à induction magnétique et point de mesure
DE102013010708B4 (de) Kapazitiver Füllstandschalter
DE102006029606A1 (de) Füllstandssensoreinrichtung für einen Vorratsbehälter mit einem Auslauf zur Bevorratung eines elektrisch leitfähigen Fluids eines Haushaltsgeräts
EP3039382B1 (fr) Capteur capacitif avec élément de chauffage intégré
DE102012014568A1 (de) Elektronischer Heizkostenverteiler mit Raumtemperatursensor
DE202006009381U1 (de) Kapazitive Füllstandsmessvorrichtung für Schüttgüter
DE102015223868B4 (de) Anordnung und Verfahren zur kapazitiven Füllstandsbestimmung
DE102013003648B3 (de) Textiler Kondensator
DE112005000387T5 (de) Messverfahren für die genaue Größe von Luftblasen in einer durch einen Schlauch fließenden Flüssigkeit und eine Elektrode eines Kapazitätssensors und ein Kapazitätssensor zur Durchführung des Messverfahrens
EP3492670A1 (fr) Dispositif d'insufflation du matériau isolant
DE102017128166A1 (de) Anordnung zur Abfrage eines kritischen Füllstandes oder eines Grenzstandes in einem Tank
EP2459974B1 (fr) Dispositif et prodédé pour la détermination d'une quantité physique d'un détecteur de proximité capacitif
DE102006003054A1 (de) Verfahren, Flüssigkeitsversorgungseinheit und Messvorrichtung für eine Füllstandsanzeige

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12770078

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12770078

Country of ref document: EP

Kind code of ref document: A1