EP3589375A1 - Dispositif de mesure du débit de fuite d'au moins un élément de masque de protection respiratoire - Google Patents
Dispositif de mesure du débit de fuite d'au moins un élément de masque de protection respiratoireInfo
- Publication number
- EP3589375A1 EP3589375A1 EP18711609.0A EP18711609A EP3589375A1 EP 3589375 A1 EP3589375 A1 EP 3589375A1 EP 18711609 A EP18711609 A EP 18711609A EP 3589375 A1 EP3589375 A1 EP 3589375A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mask
- measuring
- generating
- orifice
- communication
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B27/00—Methods or devices for testing respiratory or breathing apparatus for high altitudes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3209—Details, e.g. container closure devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3218—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators for flexible or elastic containers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3254—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a flow detector
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3263—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a differential pressure detector
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/10—Valves
Definitions
- the present invention relates to the technical field of devices for measuring the leakage rate of at least one respiratory protection mask element, the respiratory protection mask comprising at least one communication orifice between the inside of the mask, via an inlet, and the outside of the mask, through an outlet, the communication port having an open position in which a fluid can pass through the port between the inlet and the outlet and a closed position wherein a fluid can not pass through the orifice.
- a mask of respiratory protection makes it possible to protect the carrier vis-a-vis particles (aerosols) or gas by filtering the air intended for the carrier mask through a filtration device. Except for the simplest masks, the expiration of the wearer is through an exhalation valve. Thus, the exhaled air does not pass through the filter layers. As a result, in the event of a defect in the exhalation valve, a significant leakage is created and the protection conferred on the wearer by his mask is deteriorated in a generally substantial manner.
- leaks in the protective mask can come from three sources:
- the overall protection conferred by the mask can be tested in different ways:
- the mask tests presented above do not generally make it possible to discriminate between a leak at the mask-face interface, due for example to a bad choice of mask, given the morphology of the wearer, or to a bad adjustment of flanges. on the one hand, and a leak in an accessory of the defective mask, for example the exhalation valve, on the other hand.
- a device for measuring the leakage rate of at least one respiratory protection mask element comprising at least one communication orifice between the inside of the mask, via an inlet, and the outside of the mask, through an outlet, the communication port having an open position in which a fluid can pass through the port between the inlet and the outlet and a closed position in which a fluid can not pass through the orifice, is characterized in that it comprises:
- means for generating a pressure differential between the inside and the outside of the mask means for controlling the means for generating a pressure differential between the inside and the outside of the mask,
- measuring means capable of measuring the leakage rate of the communication orifice, in the closed position, at the inlet or outlet respectively,
- the means for generating a pressure differential is an overpressure generating means outside the mask, the pressure at the outlet of the communication orifice being greater than the pressure at the inlet. of the communication orifice, the measuring means being able to measure the leakage rate of the communication orifice, in the closed position, at the outlet, outside the mask.
- the communication port may be an exhalation valve, a voice diaphragm, a liquid food pick-up device or any other accessory of the mask allowing communication between the inside and the outside of the mask.
- the overpressure or depression generating means is an electric pump.
- the measuring means may comprise a flowmeter for measuring the overall volume which is injected into the confined volume above the communication orifice such as a valve, in the corresponding zone inside the mask in the case of a work with creation of an overpressure, to maintain a constant overpressure (/ a depression).
- the measuring means may comprise a differential pressure gauge for knowing the overpressure (/ depression) applied to the communication orifice such as a valve.
- the evolution of the overpressure (/ depression) over time after the shutdown of the overpressure generation means (depression respectively) can be used to determine the leakage flow, in addition to or instead of a flowmeter .
- the device according to the invention is based on the measurement of the leakage flow through a valve. This leakage rate makes it possible to quantify the intrinsic performance of the valve.
- this invention is adaptable to measuring the performance of civilian mask expiration valves, other mask accessories, etc.
- the invention must allow testing accessories having a communication port directly on the mask, to validate its performance in situ. Indeed, the fact of setting up or removing an accessory, for example a valve, its support can deteriorate significantly.
- the idea is to connect directly to the periphery of the valve, in the case of testing a valve, and to apply a differential pressure representative of the pressure in the mask when a wearer breathes.
- the leakage rate is that of the valve alone, or the accessory having a communication port tested the mask, overcoming spurious leakage mask / head interface.
- the device according to the invention therefore comprises a clip-type element allowing a connection with the mask comprising the device to be tested, or with a support on which the device to be tested is mounted.
- the means for fixing the vacuum generating means, respectively of the overpressure comprises a clamp body adapted to be secured to a support of the communication orifice.
- a piston can be slidably mounted on the body, a spring being compressed between the body and the piston.
- the body may comprise a lip, adapted to cooperate with a groove provided in the support.
- the piston may comprise a channel connected to the means of generating overpressure or depression respectively.
- Fig. 1 is a schematic representation showing a fastening means according to the invention, constituted by a clip-type element, engaged on a support belonging to a mask and carrying a valve
- Fig. 2 is a schematic perspective view of the fixing means of FIG. 1
- Fig. 3 is a half-view from above of the fixing means of FIG. 1, the support not being represented, and
- Fig. 4 is a half-view in side elevation of the fixing means of FIG. 1, the support is not shown.
- an overpressure air supply typically in the case of a test bench, or else an integrated suppression generation system, for example via a small pump, in the case of a portable variant
- a controllable valve system to let or not a flow of air, depending on a setpoint
- a differential pressure gauge to know the pressure applied to the valve that will be used as a control means of the pressure generation means
- an electronic command control card which in this embodiment is an arduino-type module, for controlling the controllable valve as a function of the values measured by the differential pressure gauge, in order to maintain a constant overpressure.
- This card also makes it possible to collect the information of the flowmeter for a calculation of the volume injected during a test;
- a computer may be used to adjust the system parameters such as, for example, the setpoint pressure, and act as a man-machine interface.
- a small screen or light or sound indicators can be connected to the control board, to gain compactness
- controllable valve assembly associated with a flowmeter may be replaced by a flow regulator according to an alternative embodiment.
- the valve assembly controllable associated with a flow meter may be omitted, in an alternative embodiment.
- FIG. 1 to 4 an embodiment of a fastening means of the vacuum generating means. Fixing is performed by clipping a clamp P in the groove 3a around the periphery of a valve support 3 and compressing an O-ring 4 around the valve 7, without touching the valve 7.
- the clamp P comprises a body 1 of substantially circular shape having a first end pierced with an orifice 1b in which the rod 2a of a piston 2 slides.
- the piston 2 also comprises a head under which a bearing surface 2b located opposite a bearing surface 1a belonging to the body 1.
- a spring 6 is interposed between the bearing surfaces 1a and 2b.
- the piston head 2 also has a lateral guiding surface 2c in contact with a cylindrical inner surface at a second end of the body 1 allowing the piston 2 to be guided in translation by the body 1.
- the piston head 2 finally has a cylindrical groove 2d accommodating an O-ring 4 sealing with a contact zone 3b provided on the support 3.
- the piston 2 is also traversed by a longitudinal channel 2e, connected to the overpressure generator thus making it possible to communicate an overpressure to the valve 7 mounted on the support 3.
- the part of the body 1 in contact with the contact surface 2c of the piston 2 has a small thickness and wide recesses leaving only deformable tabs 1f remaining.
- a prominent lip 1e is adapted to engage in a groove 3a provided on the support 3. In this way a force exerted longitudinally on the body 1 will allow the deformation of the end of the body 1 and its engagement around the support 3.
- the lip 1e penetrating into the groove 3a, allows clipping and securing the body 1 on the support 3.
- a ring 5, sliding outside the body, can be moved facing the lip 1e so as to prevent deformation of the body 1 and thus ensure the attachment of the body 1 on the support 3.
- the support 3 has a hole of communication 3c allowing the wearer of the mask to exhale through the valve 7.
- Most respirators with a valve have a groove 3a used by the device according to the invention. In the case where such a groove is absent, it is also possible to consider pinch fastening, in particular by replacing for example the lip 1e with a groove containing a deformable seal.
- the air to be injected which may possibly be replaced by nitrogen or any other inert gas, may come from the compressed air network.
- the device according to the invention has many advantages. It allows in particular a test of the intrinsic performance of the exhalation valve. The performance and the precision of the device make it possible to discriminate well the defective valves.
- a portable version of the device according to the invention has a weight of less than one kilogram and a volume of less than one liter.
- the overpressure can be provided via a small pump, powered either by the electrical network or battery, which gives the advantage to the overall device, besides being lightweight and small, to be autonomous energy.
- a small pump powered either by the electrical network or battery, which gives the advantage to the overall device, besides being lightweight and small, to be autonomous energy.
- Such a compact device can be used directly by the user of the mask to ensure the proper functioning of its valve, whether it is completely in situ, the valve being in place in the mask or the valve being out of the mask, simply placed on a valve support identical or similar to that of the mask.
- the same device regardless of its version, can also be able to measure the leakage rates through the different accessories of the mask, either with as many lines as mask accessories, or with fewer lines but a measure of the sum of the leak rates through several accessories of the mask.
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1700198A FR3063344B1 (fr) | 2017-02-28 | 2017-02-28 | Dispositif de mesure du debit de fuite d'au moins un element de masque de protection respiratoire |
| PCT/FR2018/000036 WO2018158512A1 (fr) | 2017-02-28 | 2018-02-23 | Dispositif de mesure du débit de fuite d'au moins un élément de masque de protection respiratoire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3589375A1 true EP3589375A1 (fr) | 2020-01-08 |
Family
ID=58609561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18711609.0A Withdrawn EP3589375A1 (fr) | 2017-02-28 | 2018-02-23 | Dispositif de mesure du débit de fuite d'au moins un élément de masque de protection respiratoire |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20200061400A1 (fr) |
| EP (1) | EP3589375A1 (fr) |
| CA (1) | CA3052227A1 (fr) |
| FR (1) | FR3063344B1 (fr) |
| WO (1) | WO2018158512A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596286B (zh) * | 2019-01-18 | 2020-12-22 | 阜阳市华顺水泥制品有限公司 | 一种检测效率高的水泥涵管气密性检测装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1430351A (fr) * | 1965-01-21 | 1966-03-04 | Commissariat Energie Atomique | Dispositif de mesure de l'étanchéité de masques filtrants |
| FR2862106B1 (fr) * | 2003-11-07 | 2007-08-24 | Valois Sas | Pompe de distribution de produit fluide. |
| US8708708B1 (en) * | 2009-06-29 | 2014-04-29 | Tsi, Inc. | Respirator test accessory |
-
2017
- 2017-02-28 FR FR1700198A patent/FR3063344B1/fr not_active Expired - Fee Related
-
2018
- 2018-02-23 WO PCT/FR2018/000036 patent/WO2018158512A1/fr not_active Ceased
- 2018-02-23 CA CA3052227A patent/CA3052227A1/fr active Pending
- 2018-02-23 EP EP18711609.0A patent/EP3589375A1/fr not_active Withdrawn
- 2018-02-23 US US16/489,060 patent/US20200061400A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CA3052227A1 (fr) | 2018-09-07 |
| FR3063344A1 (fr) | 2018-08-31 |
| US20200061400A1 (en) | 2020-02-27 |
| WO2018158512A1 (fr) | 2018-09-07 |
| FR3063344B1 (fr) | 2021-06-18 |
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