EP3812645A1 - Device for determining the consumption of a gas from a gas bottle at least partially filled with gas - Google Patents

Device for determining the consumption of a gas from a gas bottle at least partially filled with gas Download PDF

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Publication number
EP3812645A1
EP3812645A1 EP20197201.5A EP20197201A EP3812645A1 EP 3812645 A1 EP3812645 A1 EP 3812645A1 EP 20197201 A EP20197201 A EP 20197201A EP 3812645 A1 EP3812645 A1 EP 3812645A1
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EP
European Patent Office
Prior art keywords
gas
sensor
measurement signal
consumption
designed
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.)
Withdrawn
Application number
EP20197201.5A
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German (de)
French (fr)
Inventor
Oliver Stoll
Udo Hermann
Tobias TIPPELT
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP3812645A1 publication Critical patent/EP3812645A1/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbone dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/034—Control means using wireless transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • F17C2250/0417—Level of content in the vessel with electrical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0426—Volume
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0447—Composition; Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0465—Vibrations, e.g. of acoustic type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0486—Indicating or measuring characterised by the location
    • F17C2250/0491—Parameters measured at or inside the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0636—Flow or movement of content
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0689—Methods for controlling or regulating
    • F17C2250/0694—Methods for controlling or regulating with calculations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/024—Improving metering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/07—Applications for household use

Definitions

  • the present invention relates to a device for determining the consumption of a gas from a gas cylinder which is at least partially filled with gas.
  • gas cylinders are used in a wide variety of technical fields, but also in the field of industrial and household technology, such as, for example, in CO 2 sparkling water. In principle, the use of such devices is also conceivable in other areas of application.
  • a device for determining the consumption of a gas from a gas cylinder at least partially filled with gas, which at least largely avoids the above-mentioned disadvantages and which in particular enables a reliable and accurate determination of the gas consumption over the entire duration of the gas cylinder completely filled with liquid gas to for an empty gas cylinder with an internal pressure at ambient pressure level.
  • a device for determining the consumption of a gas from a gas bottle at least partially filled with gas, in particular liquid gas, comprises an electronic evaluation unit, a first sensor which can be connected to a gas bottle and which is designed to deliver a first measurement signal to the electronic control unit , and a second sensor which can be connected to the gas bottle and which is designed to supply a second measurement signal to the electronic control unit.
  • the second sensor is different from the first sensor.
  • the electronic evaluation unit is designed to determine the consumption of a gas from the gas cylinder based on the first measurement signal and / or the second measurement signal.
  • the second sensor can differ from the first sensor with regard to the physical measuring principle.
  • the gas consumption can be measured over the entire duration from the gas bottle completely filled with liquid gas to the empty gas bottle with an internal pressure at ambient pressure level.
  • the electronic evaluation unit can be designed to evaluate the first measurement signal and / or the second measurement signal as a function of a state of the gas in the gas cylinder. Accordingly, the measuring principle can be adapted to the condition of the gas and the measuring accuracy can be increased.
  • the first sensor and / or the second sensor can be designed to determine the state of the gas in the gas cylinder.
  • one of the sensors can detect the state of the gas, while the other sensor detects the gas consumption.
  • the sensors can change the The state of the gas can be changed. This means that both sensors can be operated at the same time and help to reliably determine gas consumption at all times.
  • a level measurement and a weight measurement of the gas bottle only provide information about gas consumption as long as there is liquid in the bottle.
  • a gas pressure measurement only provides information when the liquid has completely evaporated and there is only gas in the bottle. By evaluating the respective measurement signal, the condition and gas consumption can be recorded at the same time.
  • the first sensor and / or the second sensor can be designed for wired or wireless communication with the electronic evaluation unit. Accordingly, the type of communication between the sensors can be selected as required.
  • the first sensor and the second sensor can each be a sensor selected from the group consisting of: pressure sensor, ultrasonic sensor, weight sensor. It would also be conceivable to design the first sensor and / or the second sensor as a so-called combination sensor from the named sensor types, i.e. a sensor that combines two different measuring principles.
  • the first measurement signal can include at least two measurement values.
  • the second measurement signal can comprise at least two measurement values.
  • the measured values are recorded at different times.
  • the gas consumption can thus be determined. For example, via a difference in the measured values.
  • the gas consumption results from a difference between a first measured value and a second measured value that was recorded after the first measured value.
  • the electronic evaluation unit can have an interface for communicating with an external data processing device.
  • information about the gas consumption can also be transmitted to a spatially separate data processing device.
  • this allows remote inquiries about gas consumption, which increases user-friendliness.
  • the interface can be designed for wired or wireless communication with the external data processing device.
  • the type of communication can be selected as required.
  • the device can furthermore comprise a temperature sensor for detecting a temperature of the gas in the gas cylinder. That additional measurement of the temperature of the gas in the gas cylinder enables temperature-related fluctuations in the gas pressure to be recognized. Due to the thermal equation of state, changes in the gas pressure due to temperature changes can thus be eliminated when determining the gas consumption. A change in the gas pressure can then only come about by removing gas from the bottle.
  • the present invention provides complete information on gas consumption. Especially in the case of gases with high vapor pressure such as CO2 (approx. 70 bar), the state after the liquid has been consumed accounts for a high proportion of the total service life.
  • the invention comprises a system which consists of at least two sensors and an electronic unit in which the measurement signals from the sensors are brought together and the measurement data produced can potentially be processed.
  • the sensors can be, for example, a pressure sensor, an ultrasonic sensor, a weight sensor and a temperature sensor.
  • the electronic unit can also contain an interface via which the data can be sent to other systems. This interface can be implemented through a physical cable connection or a wireless data connection.
  • the system comprising the invention must also contain an interface for connection to a gas cylinder. Up to a certain amount of gas withdrawn, the gas pressure in the bottle is constant, since liquid gas evaporates during withdrawal until the vapor pressure of the liquid is reached again.
  • the gas consumption can be measured by measuring the level in the gas cylinder. From this point on, the level measurement no longer provides any information on gas consumption. From this point on, the gas consumption can be determined by measuring the gas pressure. In order to be able to recognize temperature-related fluctuations in the gas pressure, the temperature of the gas in the gas cylinder is also measured. Due to the thermal equation of state, changes in the gas pressure due to temperature changes can thus be eliminated when determining the gas consumption. A change in the gas pressure can then only come about by removing gas from the bottle.
  • Figure 1 shows an illustration of a device 10 according to the invention in a first state.
  • the device 10 is designed to determine the consumption of a gas 12 from a gas cylinder 14 which is at least partially filled with gas 12.
  • the gas 12 is, for example, CO 2 .
  • the gas 12 is partially liquid, so that the gas cylinder 14 is partially filled with liquid gas 16, above which the gas 12 is in its gaseous state.
  • the device 10 comprises an electronic evaluation unit 18, a first sensor 20, which can be connected to a gas cylinder 14 and which is designed to deliver a first measurement signal to the electronic evaluation unit 18, and a second sensor 22, which can be connected to the gas cylinder 14 and which is designed to deliver a second measurement signal to the electronic Evaluation unit 18 is formed.
  • the first measurement signal and / or the second measurement signal can include at least two measurement values that were recorded at different times.
  • the second sensor 22 differs from the first sensor 20, in particular with regard to the physical measuring principle.
  • the first sensor 20 can be a pressure sensor, ultrasonic sensor or weight sensor.
  • the second sensor 22 can be a pressure sensor, ultrasonic sensor or weight sensor, but differs from the first sensor 20 in terms of the measuring principle.
  • the first sensor 20 is an ultrasonic sensor and the second sensor 22 is a pressure sensor.
  • the first sensor 20 could be a weight sensor.
  • the first sensor 20 and / or the second sensor 22 is designed for wired or wireless communication with the electronic evaluation unit.
  • Figure 1 shows the first sensor 20 and the second sensor 22 in a state attached or mounted to the gas cylinder.
  • the electronic evaluation unit 18 is designed to determine the consumption of a gas 12 from the gas cylinder 14 based on the first measurement signal and / or the second measurement signal.
  • the electronic evaluation unit 18 is designed to evaluate the first measurement signal and / or the second measurement signal as a function of a state of the gas 12 in the gas cylinder 14.
  • the first sensor 20 and / or the second sensor 22 is designed to determine the state of the gas in the gas cylinder 14.
  • the device 10 furthermore comprises a temperature sensor 24 for detecting a temperature of the gas 12 in the gas cylinder 14.
  • the gas cylinder 14 contains both liquefied gas 16 and gaseous gas 12.
  • the gas consumption is determined by the liquid level, which is detected by means of the first sensor 20.
  • the second sensor 20 detects the gas pressure inside the gas bottle 14.
  • the gas pressure remains constant during the first state, ie as long as there is liquid gas 16 in the gas bottle.
  • the evaluation unit 18 determines the gas consumption based on the first measurement signal and detects the state of the gas 12 based on the second measurement signal.
  • the gas consumption can be determined from a difference between two measured values of the first measurement signal recorded at different times. For example, the gas consumption results based on the first measurement signal from a difference between a first measurement value and a second measurement value that was recorded after the first measurement value.
  • Figure 2 shows an illustration of a device 10 according to the invention in a second state. Only the differences to the Figure 1 and the same or comparable components are provided with the same reference numerals.
  • the gas cylinder 14 contains only gaseous gas 12, since the liquid gas 16 has completely evaporated.
  • the gas consumption is determined by the gas pressure by means of the second sensor 22. Changes in gas pressure caused by temperature can be eliminated by measuring the temperature by means of the temperature sensor 24 in the gas consumption calculation.
  • the level measurement by means of the first sensor 20 no longer provides any information on gas consumption.
  • the gas consumption can be determined from a difference between two measured values of the second measurement signal recorded at different times. For example, the gas consumption results based on the second measurement signal from a difference between a first measurement value and a second measurement value that was recorded after the first measurement value.
  • the mode of operation of the device 10 is correspondingly as will be described below.
  • the gas pressure in the bottle 14 is constant, since liquid gas 16 evaporates during withdrawal until the vapor pressure of the liquid is reached again.
  • the gas consumption can be measured by measuring the fill level in the gas cylinder 14. From this point on, the level measurement no longer provides any information on gas consumption. From this point on, the gas consumption can be determined by measuring the gas pressure. In order to be able to recognize temperature-related fluctuations in the gas pressure, the temperature of the gas 12 in the gas cylinder 14 is also measured. Due to the thermal equation of state, changes in the gas pressure due to temperature changes can thus be eliminated when determining the gas consumption. A change in gas pressure can then come about exclusively by removing gas 12 from bottle 14.
  • the electronic evaluation unit can optionally have an interface 26 for communicating with an external data processing device 28.
  • the interface 26 can be designed for wired or wireless communication with the external data processing device 28. This allows information on gas consumption to be transmitted to external devices.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Es wird eine Vorrichtung (10) zum Ermitteln eines Verbrauchs eines Gases aus einer zumindest teilweise mit Gas (12) gefüllten Gasflasche (14), vorgeschlagen. Die Vorrichtung (10) umfasst eine elektronische Auswerteeinheit (18), einen ersten Sensor (20), der mit einer Gasflasche (14) verbindbar ist und der zum Liefern eines ersten Messsignals an die elektronische Auswerteeinheit (18) ausgebildet ist, und einen zweiten Sensor (22), der mit der Gasflasche (14) verbindbar ist und der zum Liefern eines zweiten Messsignals an die elektronische Auswerteeinheit (18) ausgebildet ist. Der zweite Sensor (22) unterscheidet sich von dem ersten Sensor (20). Die elektronische Auswerteeinheit (18) ist zum Ermitteln eines Verbrauchs des Gases (12) aus der Gasflasche (14) basierend auf dem ersten Messsignal und/oder dem zweiten Messsignal ausgebildet.A device (10) is proposed for determining the consumption of a gas from a gas bottle (14) at least partially filled with gas (12). The device (10) comprises an electronic evaluation unit (18), a first sensor (20) which can be connected to a gas bottle (14) and which is designed to deliver a first measurement signal to the electronic evaluation unit (18), and a second sensor (22) which can be connected to the gas bottle (14) and which is designed to deliver a second measurement signal to the electronic evaluation unit (18). The second sensor (22) differs from the first sensor (20). The electronic evaluation unit (18) is designed to determine the consumption of the gas (12) from the gas cylinder (14) based on the first measurement signal and / or the second measurement signal.

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft eine Vorrichtung zum Ermitteln eines Verbrauchs eines Gases aus einer zumindest teilweise mit Gas gefüllten Gasflasche. Derartige Gasflaschen finden in vielfältigen technischen Gebieten Anwendung, aber auch im Bereich der Industrie- und Haushaltstechnik, wie beispielsweise in CO2-Trinkwassersprudlern. Grundsätzlich ist der Einsatz solcher Vorrichtungen auch in anderen Einsatzgebieten denkbar.The present invention relates to a device for determining the consumption of a gas from a gas cylinder which is at least partially filled with gas. Such gas cylinders are used in a wide variety of technical fields, but also in the field of industrial and household technology, such as, for example, in CO 2 sparkling water. In principle, the use of such devices is also conceivable in other areas of application.

Aus dem Stand der Technik ist es bekannt, dass über den Verbrauch des Gases aus einer Gasflasche für Flüssiggas durch einzelne Messmethoden wie beispielsweise der Messung des Füllstandes der Flüssigkeit in der Gasflasche, der Messung des Gasdruckes in der Gasflasche oder der Messung des Gewichtes der Gasflasche Informationen gewonnen werden können.From the prior art it is known that information about the consumption of the gas from a gas cylinder for liquid gas by individual measurement methods such as measuring the level of the liquid in the gas cylinder, measuring the gas pressure in the gas cylinder or measuring the weight of the gas cylinder can be won.

Trotz der durch diese Messmethoden bewirkten Vorteile besteht nach wie vor ein Verbesserungsbedarf. So liefern einzelne Messmethoden nur jeweils über bestimmte Zeiträume Informationen zum Gasverbrauch aus einer Gasflasche mit Flüssiggas und können durch externe Effekte wie Temperaturschwankungen verfälscht werden.Despite the advantages brought about by these measurement methods, there is still a need for improvement. For example, individual measurement methods only provide information on gas consumption from a gas cylinder with liquefied gas over certain periods of time and can be falsified by external effects such as temperature fluctuations.

Offenbarung der ErfindungDisclosure of the invention

Es wird daher eine Vorrichtung zum Ermitteln eines Verbrauchs eines Gases aus einer zumindest teilweise mit Gas gefüllten Gasflasche vorgeschlagen, die die oben genannten Nachteile zumindest weitgehend vermeidet und die insbesondere eine zuverlässige und genaue Ermittlung des Gasverbrauchs über die gesamte Dauer von der vollständig mit Flüssiggas gefüllten Gasflasche bis zur leeren Gasflasche mit einem internen Druck auf Umgebungsdruckniveau erlaubt.A device is therefore proposed for determining the consumption of a gas from a gas cylinder at least partially filled with gas, which at least largely avoids the above-mentioned disadvantages and which in particular enables a reliable and accurate determination of the gas consumption over the entire duration of the gas cylinder completely filled with liquid gas to for an empty gas cylinder with an internal pressure at ambient pressure level.

Eine erfindungsgemäße Vorrichtung zum Ermitteln eines Verbrauchs eines Gases aus einer zumindest teilweise mit Gas, insbesondere Flüssiggas, gefüllten Gasflasche, umfasst eine elektronische Auswerteeinheit, einen ersten Sensor, der mit einer Gasflasche verbindbar ist und der zum Liefern eines ersten Messsignals an die elektronische Steuereinheit ausgebildet ist, und einen zweiten Sensor, der mit der Gasflasche verbindbar ist und der zum Liefern eines zweiten Messsignals an die elektronische Steuereinheit ausgebildet ist. Der zweite Sensor unterscheidet sich von dem ersten Sensor. Die elektronische Auswerteeinheit ist zum Ermitteln eines Verbrauchs eines Gases aus der Gasflasche basierend auf dem ersten Messsignal und/oder dem zweiten Messsignal ausgebildet.A device according to the invention for determining the consumption of a gas from a gas bottle at least partially filled with gas, in particular liquid gas, comprises an electronic evaluation unit, a first sensor which can be connected to a gas bottle and which is designed to deliver a first measurement signal to the electronic control unit , and a second sensor which can be connected to the gas bottle and which is designed to supply a second measurement signal to the electronic control unit. The second sensor is different from the first sensor. The electronic evaluation unit is designed to determine the consumption of a gas from the gas cylinder based on the first measurement signal and / or the second measurement signal.

Durch den Einsatz von zwei verschiedenen Sensoren gibt es keine Zeiträume während der Nutzung der Gasflasche während denen keine Aussage über den Gasverbrauch getroffen werden kann. Stattdessen lässt sich der Gasverbrauch zuverlässig und genau durch die Plausibilisierung und Auswertung zweier verschiedener Messsignale ermitteln.Due to the use of two different sensors, there are no periods of time during the use of the gas cylinder during which no statement can be made about the gas consumption. Instead, the gas consumption can be determined reliably and precisely through the plausibility check and evaluation of two different measurement signals.

Der zweite Sensor kann sich von dem ersten Sensor hinsichtlich des physikalischen Messprinzips unterscheiden. Durch die Kombination verschiedener Messmethoden kann der Gasverbrauch über die gesamte Dauer von der vollständig mit Flüssiggas gefüllten Gasflasche bis zur leeren Gasflasche mit einem internen Druck auf Umgebungsdruckniveau gemessen werden.The second sensor can differ from the first sensor with regard to the physical measuring principle. By combining different measurement methods, the gas consumption can be measured over the entire duration from the gas bottle completely filled with liquid gas to the empty gas bottle with an internal pressure at ambient pressure level.

Die elektronische Auswerteeinheit kann zum Auswerten des ersten Messsignals und/oder des zweiten Messsignals in Abhängigkeit von einem Zustand des Gases in der Gasflasche ausgebildet sein. Entsprechend kann das Messprinzip an den Zustand des Gases angepasst werden und so die Messgenauigkeit erhöht werden.The electronic evaluation unit can be designed to evaluate the first measurement signal and / or the second measurement signal as a function of a state of the gas in the gas cylinder. Accordingly, the measuring principle can be adapted to the condition of the gas and the measuring accuracy can be increased.

Der erste Sensor und/oder der zweite Sensor kann zum Ermitteln des Zustands des Gases in der Gasflasche ausgebildet sein. Beispielsweise kann einer der Sensoren den Zustand des Gases erfassen, während der andere Sensor den Gasverbrauch erfasst. Dabei können die Sensoren bei einer Änderung des Zustands des Gases gewechselt werden. Somit lassen sich beide Sensoren gleichzeitig betreiben und tragen dazu bei, den Gasverbrauch zuverlässig zu jedem Zeitpunkt zu ermitteln. Beispielsweise liefern eine Füllstandsmessung sowie eine Gewichtsmessung der Gasflasche nur so lange Informationen über den Gasverbrauch, wie Flüssigkeit in der Flasche vorhanden ist. Eine Gasdruckmessung liefert erst Informationen, wenn die Flüssigkeit vollständig verdampft ist und sich ausschließlich Gas in der Flasche befindet. Durch Auswertung des jeweiligen Messsignals lässt sich der Zustand und der Gasverbrauch gleichzeitig erfassen.The first sensor and / or the second sensor can be designed to determine the state of the gas in the gas cylinder. For example, one of the sensors can detect the state of the gas, while the other sensor detects the gas consumption. The sensors can change the The state of the gas can be changed. This means that both sensors can be operated at the same time and help to reliably determine gas consumption at all times. For example, a level measurement and a weight measurement of the gas bottle only provide information about gas consumption as long as there is liquid in the bottle. A gas pressure measurement only provides information when the liquid has completely evaporated and there is only gas in the bottle. By evaluating the respective measurement signal, the condition and gas consumption can be recorded at the same time.

Der erste Sensor und/oder der zweite Sensor kann zum kabelgebundenen oder kabellosen Kommunizieren mit der elektronischen Auswerteeinheit ausgebildet sein. Entsprechend kann die Art der Kommunikation der Sensoren nach Bedarf gewählt werden.The first sensor and / or the second sensor can be designed for wired or wireless communication with the electronic evaluation unit. Accordingly, the type of communication between the sensors can be selected as required.

Der erste Sensor und der zweite Sensor können jeweils ein Sensor sein, der ausgewählt ist aus der Gruppe bestehend aus: Drucksensor, Ultraschallsensor, Gewichtssensor. Denkbar wäre auch die Ausbildung des ersten Sensors und/oder des zweiten Sensors als sogenannter Kombinationssensor aus den genannten Sensortypen, d.h. ein Sensor, der zwei unterschiedliche Messprinzipien vereint.The first sensor and the second sensor can each be a sensor selected from the group consisting of: pressure sensor, ultrasonic sensor, weight sensor. It would also be conceivable to design the first sensor and / or the second sensor as a so-called combination sensor from the named sensor types, i.e. a sensor that combines two different measuring principles.

Das erste Messsignal kann mindestens zwei Messwerte umfassen. Alternativ oder zusätzlich kann das zweite Messsignal mindestens zwei Messwerte umfassen. Die Messwerte sind dabei zu unterschiedlichen Zeitpunkten erfasst. Somit lässt sich der Gasverbrauch ermitteln. Beispielsweise über eine Differenz der Messwerte. So ergibt sich beispielsweise der Gasverbrauch aus einer Differenz eines ersten Messwerts und eines zweiten Messwerts, der zeitlich nach dem ersten Messwert erfasst wurde.The first measurement signal can include at least two measurement values. Alternatively or additionally, the second measurement signal can comprise at least two measurement values. The measured values are recorded at different times. The gas consumption can thus be determined. For example, via a difference in the measured values. For example, the gas consumption results from a difference between a first measured value and a second measured value that was recorded after the first measured value.

Die elektronische Auswerteeinheit kann eine Schnittstelle zum Kommunizieren mit einer externen Datenverarbeitungsvorrichtung aufweisen. Damit lassen sich Informationen über den Gasverbrauch auch an eine räumlich getrennte Datenverarbeitungsvorrichtung übermitteln. Entsprechend erlaubt dies eine Fernabfrage über den Gasverbrauch, was die Benutzerfreundlichkeit erhöht.The electronic evaluation unit can have an interface for communicating with an external data processing device. In this way, information about the gas consumption can also be transmitted to a spatially separate data processing device. Correspondingly, this allows remote inquiries about gas consumption, which increases user-friendliness.

Die Schnittstelle kann zum kabelgebundenen oder kabellosen Kommunizieren mit der externen Datenverarbeitungsvorrichtung ausgebildet sein. Somit kann die Art der Kommunikation nach Bedarf gewählt werden.The interface can be designed for wired or wireless communication with the external data processing device. Thus, the type of communication can be selected as required.

Die Vorrichtung kann weiterhin einen Temperatursensor zum Erfassen einer Temperatur des Gases in der Gasflasche umfassen. Dass zusätzliche Messen der Temperatur des Gases in der Gasflasche erlaubt, temperaturbedingte Schwankungen im Gasdruck erkennen zu können. Aufgrund der thermischen Zustandsgleichung können Änderungen des Gasdruckes durch Temperaturänderungen somit bei der Ermittlung des Gasverbrauches eliminiert werden. Eine Änderung des Gasdruckes kann dann ausschließlich durch Entnahme von Gas aus der Flasche zustande kommen.The device can furthermore comprise a temperature sensor for detecting a temperature of the gas in the gas cylinder. That additional measurement of the temperature of the gas in the gas cylinder enables temperature-related fluctuations in the gas pressure to be recognized. Due to the thermal equation of state, changes in the gas pressure due to temperature changes can thus be eliminated when determining the gas consumption. A change in the gas pressure can then only come about by removing gas from the bottle.

Bei der erfindungsgemäßen Vorrichtung gibt es keine Zeiträume während der Nutzung der Gasflasche während denen keine Aussage über den Gasverbrauch getroffen werden kann. Eine Füllstandsmessung sowie eine Gewichtsmessung der Flasche liefern nur so lange Informationen über den Gasverbrauch, wie Flüssigkeit in der Flasche vorhanden ist. Eine Gasdruckmessung liefert erst Informationen, wenn die Flüssigkeit vollständig verdampft ist und sich ausschließlich Gas in der Flasche befindet. Die vorliegende Erfindung liefert dagegen lückenlos Informationen zum Gasverbrauch. Insbesondere bei Gasen mit hohem Dampfdruck wie CO2 (circa 70 bar) macht der Zustand nach Verbrauch der Flüssigkeit einen hohen Anteil der Gesamtnutzungsdauer aus.In the device according to the invention, there are no periods of time during the use of the gas cylinder during which no statement can be made about the gas consumption. A level measurement and a weight measurement of the bottle only provide information about gas consumption as long as there is liquid in the bottle. A gas pressure measurement only provides information when the liquid has completely evaporated and there is only gas in the bottle. In contrast, the present invention provides complete information on gas consumption. Especially in the case of gases with high vapor pressure such as CO2 (approx. 70 bar), the state after the liquid has been consumed accounts for a high proportion of the total service life.

Die Erfindung umfasst ein System, das aus mindestens zwei Sensoren sowie einer elektronischen Einheit besteht, in der die Messsignale der Sensoren zusammengeführt werden und die entstehenden Messdaten potentiell verarbeitet werden können. Die Sensoren können im Einzelnen z.B. ein Drucksensor, ein Ultraschallsensor, ein Gewichtssensor sowie ein Temperatursensor sein. Die elektronische Einheit kann zudem eine Schnittstelle enthalten, über welche die Daten an weitere Systeme gesendet werden können. Diese Schnittstelle kann durch einen physischen Kabelanschluss oder eine drahtlose Datenverbindung realisiert werden. Das System, welches die Erfindung umfasst, muss zudem eine Schnittstelle für den Anschluss an einer Gasflasche enthalten. Bis zu einer bestimmten Entnahmemenge des Gases ist der Gasdruck in der Flasche konstant, da Flüssiggas bei der Entnahme verdampft bis der Dampfdruck der Flüssigkeit wieder erreicht ist. Bis zum Zeitpunkt des vollständigen Verdampfens des Flüssiggases kann der Gasverbrauch anhand der Messung des Füllstandes in der Gasflasche gemessen werden. Ab diesem Zeitpunkt liefert die Füllstandsmessung keine Information mehr zum Gasverbrauch. Ab diesem Zeitpunkt kann der Gasverbrauch durch die Messung des Gasdruckes ermittelt werden. Um temperaturbedingte Schwankungen im Gasdruck erkennen zu können, wird zusätzlich die Temperatur des Gases in der Gasflasche gemessen. Aufgrund der thermischen Zustandsgleichung können Änderungen des Gasdruckes durch Temperaturänderungen somit bei der Ermittlung des Gasverbrauches eliminiert werden. Eine Änderung des Gasdruckes kann dann ausschließlich durch Entnahme von Gas aus der Flasche zustande kommen.The invention comprises a system which consists of at least two sensors and an electronic unit in which the measurement signals from the sensors are brought together and the measurement data produced can potentially be processed. In detail, the sensors can be, for example, a pressure sensor, an ultrasonic sensor, a weight sensor and a temperature sensor. The electronic unit can also contain an interface via which the data can be sent to other systems. This interface can be implemented through a physical cable connection or a wireless data connection. The system comprising the invention must also contain an interface for connection to a gas cylinder. Up to a certain amount of gas withdrawn, the gas pressure in the bottle is constant, since liquid gas evaporates during withdrawal until the vapor pressure of the liquid is reached again. By the time of If the liquid gas has completely evaporated, the gas consumption can be measured by measuring the level in the gas cylinder. From this point on, the level measurement no longer provides any information on gas consumption. From this point on, the gas consumption can be determined by measuring the gas pressure. In order to be able to recognize temperature-related fluctuations in the gas pressure, the temperature of the gas in the gas cylinder is also measured. Due to the thermal equation of state, changes in the gas pressure due to temperature changes can thus be eliminated when determining the gas consumption. A change in the gas pressure can then only come about by removing gas from the bottle.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere optionale Einzelheiten und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele, welche in den Figuren schematisch dargestellt sind.Further optional details and features of the invention emerge from the following description of preferred exemplary embodiments, which are shown schematically in the figures.

Es zeigen:

  • Figur 1 eine Darstellung einer erfindungsgemäßen Vorrichtung bei einem ersten Zustand und
  • Figur 2 eine Darstellung der erfindungsgemäßen Vorrichtung bei einem zweiten Zustand.
Show it:
  • Figure 1 a representation of an inventive device in a first state and
  • Figure 2 a representation of the device according to the invention in a second state.

Ausführungsformen der ErfindungEmbodiments of the invention

Figur 1 zeigt eine Darstellung einer erfindungsgemäßen Vorrichtung 10 bei einem ersten Zustand. Die Vorrichtung 10 ist zum Ermitteln eines Verbrauchs eines Gases 12 aus einer zumindest teilweise mit Gas 12 gefüllten Gasflasche 14 ausgebildet. Das Gas 12 ist beispielsweise CO2. In dem ersten Zustand ist das Gas 12 teilweise flüssig, so dass die Gasflasche 14 teilweise mit Flüssiggas 16 gefüllt ist, über dem sich das Gas 12 in seinem gasförmigen Zustand befindet. Figure 1 shows an illustration of a device 10 according to the invention in a first state. The device 10 is designed to determine the consumption of a gas 12 from a gas cylinder 14 which is at least partially filled with gas 12. The gas 12 is, for example, CO 2 . In the first state, the gas 12 is partially liquid, so that the gas cylinder 14 is partially filled with liquid gas 16, above which the gas 12 is in its gaseous state.

Die Vorrichtung 10 umfasst eine elektronische Auswerteeinheit 18, einen ersten Sensor 20, der mit einer Gasflasche 14 verbindbar ist und der zum Liefern eines ersten Messsignals an die elektronische Auswerteeinheit 18 ausgebildet ist, und einen zweiten Sensor 22, der mit der Gasflasche 14 verbindbar ist und der zum Liefern eines zweiten Messsignals an die elektronische Auswerteeinheit 18 ausgebildet ist. Das erste Messsignal und/oder das zweite Messsignal kann mindestens zwei Messwerte umfassen, die zu unterschiedlichen Zeitpunkten erfasst wurden. Der zweite Sensor 22 unterscheidet sich von dem ersten Sensor 20, insbesondere hinsichtlich des physikalischen Messprinzips. Der erste Sensor 20 kann ein Drucksensor, Ultraschallsensor oder Gewichtssensor sein. Der zweite Sensor 22 kann ein Drucksensor, Ultraschallsensor oder Gewichtssensor sein, unterscheidet sich aber hinsichtlich des Messprinzips von dem ersten Sensor 20. Bei dem gezeigten Ausführungsbeispiel ist der erste Sensor 20 ein Ultraschallsensor und der zweite Sensor 22 ist ein Drucksensor. Alternativ könnte der erste Sensor 20 ein Gewichtssensor sein. Der erste Sensor 20 und/oder der zweite Sensor 22 ist zum kabelgebundenen oder kabellosen Kommunizieren mit der elektronischen Auswerteeinheit ausgebildet.The device 10 comprises an electronic evaluation unit 18, a first sensor 20, which can be connected to a gas cylinder 14 and which is designed to deliver a first measurement signal to the electronic evaluation unit 18, and a second sensor 22, which can be connected to the gas cylinder 14 and which is designed to deliver a second measurement signal to the electronic Evaluation unit 18 is formed. The first measurement signal and / or the second measurement signal can include at least two measurement values that were recorded at different times. The second sensor 22 differs from the first sensor 20, in particular with regard to the physical measuring principle. The first sensor 20 can be a pressure sensor, ultrasonic sensor or weight sensor. The second sensor 22 can be a pressure sensor, ultrasonic sensor or weight sensor, but differs from the first sensor 20 in terms of the measuring principle. In the exemplary embodiment shown, the first sensor 20 is an ultrasonic sensor and the second sensor 22 is a pressure sensor. Alternatively, the first sensor 20 could be a weight sensor. The first sensor 20 and / or the second sensor 22 is designed for wired or wireless communication with the electronic evaluation unit.

Figur 1 zeigt den ersten Sensor 20 und den zweiten Sensor 22 in einem an der Gasflasche angebrachten oder montierten Zustand. Die elektronische Auswerteeinheit 18 ist zum Ermitteln eines Verbrauchs eines Gases 12 aus der Gasflasche 14 basierend auf dem ersten Messsignal und/oder dem zweiten Messsignal ausgebildet. Die elektronische Auswerteeinheit 18 ist zum Auswerten des ersten Messsignals und/oder des zweiten Messsignals in Abhängigkeit von einem Zustand des Gases 12 in der Gasflasche 14 ausgebildet. Der erste Sensor 20 und/oder der zweite Sensor 22 ist zum Ermitteln des Zustands des Gases in der Gasflasche 14 ausgebildet ist. Bei dem gezeigten Ausführungsbeispiel umfasst die Vorrichtung 10 weiterhin einen Temperatursensor 24 zum Erfassen einer Temperatur des Gases 12 in der Gasflasche 14. Figure 1 shows the first sensor 20 and the second sensor 22 in a state attached or mounted to the gas cylinder. The electronic evaluation unit 18 is designed to determine the consumption of a gas 12 from the gas cylinder 14 based on the first measurement signal and / or the second measurement signal. The electronic evaluation unit 18 is designed to evaluate the first measurement signal and / or the second measurement signal as a function of a state of the gas 12 in the gas cylinder 14. The first sensor 20 and / or the second sensor 22 is designed to determine the state of the gas in the gas cylinder 14. In the exemplary embodiment shown, the device 10 furthermore comprises a temperature sensor 24 for detecting a temperature of the gas 12 in the gas cylinder 14.

Bei dem in Figur 1 gezeigten Zustand enthält die Gasflasche 14 sowohl verflüssigtes Gas 16 als auch gasförmiges Gas 12. Der Gasverbrauch wird durch den Flüssigkeitsstand ermittelt, der mittels des ersten Sensors 20 erfasst wird. Der zweite Sensor 20 erfasst den Gasdruck im Inneren der Gasflasche 14. Der Gasdruck bleibt während des ersten Zustands, d.h. solange wie sich flüssiges Gas 16 in der Gasflasche befindet, konstant. Entsprechend ermittelt die Auswerteeinheit 18 den Gasverbrauch basierend auf dem ersten Messsignal und erfasst den Zustand des Gases 12 basierend auf dem zweiten Messsignal. Aus einer Differenz von zwei zu unterschiedlichen Zeitpunkten erfassten Messwerten des ersten Messsignals ist der Gasverbrauch ermittelbar. So ergibt sich beispielsweise der Gasverbrauch basierend auf dem ersten Messsignal aus einer Differenz eines ersten Messwerts und eines zweiten Messwerts, der zeitlich nach dem ersten Messwert erfasst wurde.The in Figure 1 As shown in the state shown, the gas cylinder 14 contains both liquefied gas 16 and gaseous gas 12. The gas consumption is determined by the liquid level, which is detected by means of the first sensor 20. The second sensor 20 detects the gas pressure inside the gas bottle 14. The gas pressure remains constant during the first state, ie as long as there is liquid gas 16 in the gas bottle. Correspondingly, the evaluation unit 18 determines the gas consumption based on the first measurement signal and detects the state of the gas 12 based on the second measurement signal. The gas consumption can be determined from a difference between two measured values of the first measurement signal recorded at different times. For example, the gas consumption results based on the first measurement signal from a difference between a first measurement value and a second measurement value that was recorded after the first measurement value.

Figur 2 zeigt eine Darstellung einer erfindungsgemäßen Vorrichtung 10 bei einem zweiten Zustand. Nachstehend werden lediglich die Unterschiede zur Figur 1 beschrieben und gleiche oder vergleichbare Bauteile sind mit gleichen Bezugszeichen versehen. Während des zweiten Zustands enthält die Gasflasche 14 ausschließlich gasförmiges Gas 12, da das Flüssiggas 16 vollständig verdampft ist. Der Gasverbrauch wird mittels des zweiten Sensors 22 durch den Gasdruck ermittelt. Temperaturbedingte Gasdruckänderungen können durch die Temperaturmessung mittels des Temperatursensors 24 in der Gasverbrauchsberechnung eliminiert werden. In dem zweiten Zustand liefert die Füllstandsmessung mittels des ersten Sensors 20 keine Information mehr zum Gasverbrauch. Aus einer Differenz von zwei zu unterschiedlichen Zeitpunkten erfassten Messwerten des zweiten Messsignals ist der Gasverbrauch ermittelbar. So ergibt sich beispielsweise der Gasverbrauch basierend auf dem zweiten Messsignal aus einer Differenz eines ersten Messwerts und eines zweiten Messwerts, der zeitlich nach dem ersten Messwert erfasst wurde. Figure 2 shows an illustration of a device 10 according to the invention in a second state. Only the differences to the Figure 1 and the same or comparable components are provided with the same reference numerals. During the second state, the gas cylinder 14 contains only gaseous gas 12, since the liquid gas 16 has completely evaporated. The gas consumption is determined by the gas pressure by means of the second sensor 22. Changes in gas pressure caused by temperature can be eliminated by measuring the temperature by means of the temperature sensor 24 in the gas consumption calculation. In the second state, the level measurement by means of the first sensor 20 no longer provides any information on gas consumption. The gas consumption can be determined from a difference between two measured values of the second measurement signal recorded at different times. For example, the gas consumption results based on the second measurement signal from a difference between a first measurement value and a second measurement value that was recorded after the first measurement value.

Die Funktionsweise der Vorrichtung 10 ist entsprechend wie nachstehend beschrieben wird. Bis zu einer bestimmten Entnahmemenge des Gases 12 ist der Gasdruck in der Flasche 14 konstant, da Flüssiggas 16 bei der Entnahme verdampft bis der Dampfdruck der Flüssigkeit wieder erreicht ist. Bis zum Zeitpunkt des vollständigen Verdampfens des Flüssiggases 16 kann der Gasverbrauch anhand der Messung des Füllstandes in der Gasflasche 14 gemessen werden. Ab diesem Zeitpunkt liefert die Füllstandsmessung keine Information mehr zum Gasverbrauch. Ab diesem Zeitpunkt kann der Gasverbrauch durch die Messung des Gasdruckes ermittelt werden. Um temperaturbedingte Schwankungen im Gasdruck erkennen zu können, wird zusätzlich die Temperatur des Gases 12 in der Gasflasche 14 gemessen. Aufgrund der thermischen Zustandsgleichung können Änderungen des Gasdruckes durch Temperaturänderungen somit bei der Ermittlung des Gasverbrauches eliminiert werden. Eine Änderung des Gasdruckes kann dann ausschließlich durch Entnahme von Gas 12 aus der Flasche 14 zustande kommen.The mode of operation of the device 10 is correspondingly as will be described below. Up to a certain withdrawal amount of the gas 12, the gas pressure in the bottle 14 is constant, since liquid gas 16 evaporates during withdrawal until the vapor pressure of the liquid is reached again. Up to the point in time when the liquid gas 16 has completely evaporated, the gas consumption can be measured by measuring the fill level in the gas cylinder 14. From this point on, the level measurement no longer provides any information on gas consumption. From this point on, the gas consumption can be determined by measuring the gas pressure. In order to be able to recognize temperature-related fluctuations in the gas pressure, the temperature of the gas 12 in the gas cylinder 14 is also measured. Due to the thermal equation of state, changes in the gas pressure due to temperature changes can thus be eliminated when determining the gas consumption. A change in gas pressure can then come about exclusively by removing gas 12 from bottle 14.

Die elektronische Auswerteeinheit kann optional eine Schnittstelle 26 zum Kommunizieren mit einer externen Datenverarbeitungsvorrichtung 28 aufweisen. Die Schnittstelle 26 kann zum kabelgebundenen oder kabellosen Kommunizieren mit der externen Datenverarbeitungsvorrichtung 28 ausgebildet sein. Dadurch lassen sich Informationen zum Gasverbrauch an externe Geräte übermitteln.The electronic evaluation unit can optionally have an interface 26 for communicating with an external data processing device 28. The interface 26 can be designed for wired or wireless communication with the external data processing device 28. This allows information on gas consumption to be transmitted to external devices.

Claims (10)

Vorrichtung (10) zum Ermitteln eines Verbrauchs eines Gases aus einer zumindest teilweise mit Gas (12) gefüllten Gasflasche (14), umfassend: eine elektronische Auswerteeinheit (18), einen ersten Sensor (20), der mit einer Gasflasche (14) verbindbar ist und der zum Liefern eines ersten Messsignals an die elektronische Auswerteeinheit (18) ausgebildet ist, und einen zweiten Sensor (22), der mit der Gasflasche (14) verbindbar ist und der zum Liefern eines zweiten Messsignals an die elektronische Auswerteeinheit (18) ausgebildet ist, wobei sich der zweite Sensor (22) von dem ersten Sensor (20) unterscheidet, wobei die elektronische Auswerteeinheit (18) zum Ermitteln eines Verbrauchs des Gases (12) aus der Gasflasche (14) basierend auf dem ersten Messsignal und/oder dem zweiten Messsignal ausgebildet ist. Device (10) for determining the consumption of a gas from a gas cylinder (14) at least partially filled with gas (12), comprising: an electronic evaluation unit (18), a first sensor (20) which can be connected to a gas bottle (14) and which is designed to deliver a first measurement signal to the electronic evaluation unit (18), and a second sensor (22) which can be connected to the gas bottle (14) and which is designed to deliver a second measurement signal to the electronic evaluation unit (18), the second sensor (22) differing from the first sensor (20), wherein the electronic evaluation unit (18) is designed to determine a consumption of the gas (12) from the gas cylinder (14) based on the first measurement signal and / or the second measurement signal. Vorrichtung (10) nach dem vorhergehenden Anspruch, wobei sich der zweite Sensor (22) von dem ersten Sensor (20) hinsichtlich des physikalischen Messprinzips unterscheidet.Device (10) according to the preceding claim, wherein the second sensor (22) differs from the first sensor (20) with regard to the physical measuring principle. Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei die elektronische Auswerteeinheit (18) zum Auswerten des ersten Messsignals und/oder des zweiten Messsignals in Abhängigkeit von einem Zustand des Gases (12) in der Gasflasche (14) ausgebildet ist.Device (10) according to one of the preceding claims, wherein the electronic evaluation unit (18) is designed to evaluate the first measurement signal and / or the second measurement signal as a function of a state of the gas (12) in the gas cylinder (14). Vorrichtung (10) nach dem vorhergehenden Anspruch, wobei der erste Sensor (20) und/oder der zweite Sensor (22) zum Ermitteln des Zustands des Gases (12) in der Gasflasche (14) ausgebildet ist.Device (10) according to the preceding claim, wherein the first sensor (20) and / or the second sensor (22) is designed to determine the state of the gas (12) in the gas cylinder (14). Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei der erste Sensor (20) und/oder der zweite Sensor (22) zum kabelgebundenen oder kabellosen Kommunizieren mit der elektronischen Auswerteeinheit (18) ausgebildet sind.Device (10) according to one of the preceding claims, wherein the first sensor (20) and / or the second sensor (22) are designed for wired or wireless communication with the electronic evaluation unit (18). Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei der erste Sensor (20) und der zweite Sensor (22) mindestens ein Sensor ist ausgewählt aus der Gruppe bestehend aus: Drucksensor, Ultraschallsensor, Gewichtssensor.Device (10) according to one of the preceding claims, wherein the first sensor (20) and the second sensor (22) at least one sensor is selected from the group consisting of: pressure sensor, ultrasonic sensor, weight sensor. Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei das erste Messsignal und/oder das zweite Messsignal mindestens zwei Messwerte umfasst, wobei die Messwerte zu unterschiedlichen Zeitpunkten erfasst sind.Device (10) according to one of the preceding claims, wherein the first measurement signal and / or the second measurement signal comprises at least two measurement values, the measurement values being recorded at different times. Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei die elektronische Auswerteeinheit (18) eine Schnittstelle (26) zum Kommunizieren mit einer externen Datenverarbeitungsvorrichtung (28) aufweist.Device (10) according to one of the preceding claims, wherein the electronic evaluation unit (18) has an interface (26) for communicating with an external data processing device (28). Vorrichtung (10) nach dem vorhergehenden Anspruch, wobei die Schnittstelle (26) zum kabelgebundenen oder kabellosen Kommunizieren mit der externen Datenverarbeitungsvorrichtung (28) ausgebildet ist.Device (10) according to the preceding claim, wherein the interface (26) is designed for wired or wireless communication with the external data processing device (28). Vorrichtung (10) nach einem der vorhergehenden Ansprüche, weiterhin umfassend einen Temperatursensor (24) zum Erfassen einer Temperatur des Gases (12) in der Gasflasche (14).Device (10) according to one of the preceding claims, further comprising a temperature sensor (24) for detecting a temperature of the gas (12) in the gas bottle (14).
EP20197201.5A 2019-10-25 2020-09-21 Device for determining the consumption of a gas from a gas bottle at least partially filled with gas Withdrawn EP3812645A1 (en)

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Citations (2)

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Publication number Priority date Publication date Assignee Title
DE102017011349A1 (en) * 2016-12-20 2018-06-21 Scania Cv Ab METHOD FOR DETERMINING THE FUNCTIONING OF A PRESSURE REGULATOR AND A LIQUID GAS FUEL SYSTEM
WO2020249681A1 (en) * 2019-06-14 2020-12-17 Volkswagen Ag Fuel supply system for primary supply of an energy conversion device from a gas cushion of a fuel tank in which gaseous fuel is stored in liquefied form

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017011349A1 (en) * 2016-12-20 2018-06-21 Scania Cv Ab METHOD FOR DETERMINING THE FUNCTIONING OF A PRESSURE REGULATOR AND A LIQUID GAS FUEL SYSTEM
WO2020249681A1 (en) * 2019-06-14 2020-12-17 Volkswagen Ag Fuel supply system for primary supply of an energy conversion device from a gas cushion of a fuel tank in which gaseous fuel is stored in liquefied form

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