EP0536546B1 - Gebläseunterstütztes Atemschutzgerät mit einem aufsetzbaren Steuerteil - Google Patents

Gebläseunterstütztes Atemschutzgerät mit einem aufsetzbaren Steuerteil Download PDF

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Publication number
EP0536546B1
EP0536546B1 EP92115316A EP92115316A EP0536546B1 EP 0536546 B1 EP0536546 B1 EP 0536546B1 EP 92115316 A EP92115316 A EP 92115316A EP 92115316 A EP92115316 A EP 92115316A EP 0536546 B1 EP0536546 B1 EP 0536546B1
Authority
EP
European Patent Office
Prior art keywords
blower unit
gas
control unit
respiratory
housing
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.)
Expired - Lifetime
Application number
EP92115316A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0536546A1 (de
Inventor
Bodo Heins
Torsten Birenheide
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of EP0536546A1 publication Critical patent/EP0536546A1/de
Application granted granted Critical
Publication of EP0536546B1 publication Critical patent/EP0536546B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A62B18/006—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 with pumps for forced ventilation

Definitions

  • the invention relates to a respirator with a respirator, to the respiratory gas inlet of which a particle or respiratory gas filter and a blower unit supporting breathing are connected, the blower unit being equipped with cable bushings for the electrical energy supply, and the respirator mask being at least directly connected to one another with the blower unit.
  • the respirator mask is directly connected to both the blower unit and the filter, the blower unit and filter being aligned with one another in the axial flow direction.
  • the fan part of the blower unit which supports the breathing gas during inhalation, is once fluidly arranged behind the filter as a breathing gas-sucking fan wheel, but it can also be installed upstream of the filter in terms of flow, the fan part pressing the breathing gas through the filter into the breathing gas inlet of the breathing mask.
  • the energy supply for the fan part is led out and through electrical lines from the blower unit a separate power supply (battery, control unit for the blower power and monitoring of the operating functions), which is attached as a separate component, for example, to the belt of the equipment carrier.
  • a pressure sensor which switches the blower unit on or off under certain circumstances using a switch. Both the sensor and the switch are fastened in a suitable place within the mask body, and their electrical connection is made to the power supply via separate cables.
  • control modules required for monitoring the blower unit are each individually connected both to the blower unit and to the energy supply, and that after replacing filters with different breathing gas resistances, the monitoring elements (pressure sensor, switch) cannot adapt to the new conditions, such as flow resistance and delivery rate.
  • the present invention is therefore based on the object of improving a respirator of the type mentioned in such a way that the blower output can be controlled independently of the filter type used and the filter service life according to predetermined setpoints, and the components controlling the blower output are attached to locations which are favorable for operation. and in the event of a filter change or changing loading condition of the built-in filters, the blower unit can be adapted to the changed performance parameters during operation.
  • the housing of the blower unit has a saddle-shaped upper part, via which a control unit adapted in terms of its outer dimensions to the contour of the upper part, the switching elements for the operation of the blower unit combined in an independent housing module, can be plugged on in a bow-like manner and thereby via electrical contact devices is connected to the cable bushings.
  • the advantage of the invention lies essentially in the fact that the housing module for the control part can be placed separately on the upper part of the blower unit, wherein it contains the components necessary for the operation and wiring of the blower unit.
  • the motor speed of the fan section can be monitored according to specified performance data and readjusted if necessary.
  • the necessary blower power can be programmed into a data memory within the control unit and can be passed on and monitored to the fan part of the blower unit via a speed setting.
  • the fan part can be a radial or an axial fan, which is driven by an electric motor.
  • Various types of coding can be used to ensure that the control unit required for the respiratory gas filter used is used.
  • such coding consists of a color marking on the control unit, which corresponds to the corresponding marking on the breathing gas filter.
  • the flow resistance increases, so that the increased power consumption of the motor for the fan part is regulated accordingly. This can be done by a power controller within the control unit.
  • a full face mask with a viewing window is used as a respiratory mask
  • the blower unit is provided with the control unit required for operation.
  • a simple coupling of the control unit to the upper part can be achieved in that the upper part has a semi-cylindrical shape, by means of which the control unit designed in the form of a horseshoe can be placed and engages around the upper part.
  • the electrical line bushings as metallic contact pads to the surface of the housing of the blower unit.
  • the control unit has contact pins at corresponding points which protrude from the housing surface and are pressed onto the contact pads when the control unit is attached.
  • the type and number of contact pins and the associated contact pads can also be used to provide further coding for a suitable combination between control unit and breathing gas filter.
  • a pressure line starting from the fan part of the blower unit to the surface of the housing of the blower unit, which ends there in a line mouth which is brought into a pressure-tight connection with a pressure inlet when the housing module of the control unit is plugged on. From the inlet, the pressure line continues to a pressure sensor within the control unit, so that the delivery pressure can always be measured and monitored. If a pressure limit is exceeded, which, for example, indicates that the respiratory gas filter is fully loaded, there is an acoustic and / or visual warning.
  • the pressure sensor is formed from a housing which is divided into two by a membrane, one housing part being connected to the pressure line and the other housing part being connected to the surroundings.
  • a magnet on the membrane which is moved with the membrane depending on the prevailing pressure conditions. The position of the magnet and thus the currently prevailing pressure is converted into an electrical signal by a holding element. If, for example, the power of the fan part of the blower unit is no longer sufficient to ensure sufficient overpressure in the breathing gas inlet, a pressure drop is generated with each breath, which triggers the warning when typically 0.1 mbar is reached.
  • the control unit works in this way as a display unit, both in the normal operating state and in the event of a fault if the fan part fails by a simple resistance detection triggering the warning device.
  • control unit contains a sensor element which responds in its composition to the breathing gas to be conveyed.
  • the gas-sensitive measuring surface of the sensor element is led out via a gas sample line to the surface of the housing module to a measuring gas opening and is brought into a gas-tight connection to a measuring gas line in the blower unit when the housing module is attached.
  • the sample gas line continues within the blower unit up to the breathing gas inlet through which the breathing gas is conveyed.
  • the sensor element responds to those gas components within the breathing gas that are to be retained by the filter.
  • An electrochemical measuring cell proves to be particularly suitable as a sensor element, since it is distinguished by an extremely low power consumption.
  • control unit as an independent housing module on a corresponding upper part of the blower unit can be realized both for full masks and for half masks, without the features of the invention having to be changed or the advantages of the invention being diminished.
  • FIG. 1 shows a breathing apparatus which, in conjunction with a full face mask (1), consists of a blower unit (2) which is connected on the one hand to the breathing gas inlet (3) of the mask (1) and on the other hand to the breathing gas filter (4).
  • the blower unit (2) is thus located in terms of flow between the breathing gas filter (4) and the breathing gas inlet (3).
  • the blower unit (2) has a semi-cylindrical upper part (5), which is arranged in the continuation of the center line of a viewing window (6) of the full face mask (1) in the field of view of the device wearer.
  • the upper part (5) has a control unit (7) placed in a bracket-like manner and brought into mechanical and electrical contact with the blower unit (2).
  • a warning lamp (9) points in the direction of the viewing window (6) on an elevation (8).
  • the partial section shown in FIG. 2 contains the breathing gas filter (4) in a filter housing (20), which is brought into flow connection with the blower unit (2) by means of a breathable gas-permeable cover (21).
  • the tight fit of the filter (4) is made by sealing pads (22).
  • the blower unit (2) contains a fan part (23) in the form of an axial blower, which is connected to an electric motor (24).
  • the necessary power lines (25) go from the electric motor (24) to metallic contact pads (26) which are attached to the surface of the blower unit (2).
  • the blower unit (2) also contains a pressure line (27), which is connected to the interior of the filter housing (20) and also opens on the surface of the blower unit (2), and a sample gas line (28), which also connects to the interior of the filter housing (20) is connected and opens on the surface of the blower unit (2).
  • the housing module (7) of the control unit which is placed on the upper part (5) of the blower unit (2), contains a sensor element (29) designed as an electrochemical gas sensor, the gas sample line (36) at its sample gas opening (30) being brought into register with the sample gas line (28) and a pressure sensor (31), the pressure inlet (32) of which is pressure-tightly connected to the mouth of the pressure line (27).
  • a Central control unit (33) (microprocessor) is connected on the one hand via contact pins (34) to the contact pads (26) and on the other hand via connecting lines (not shown) both to the pressure sensor (31), the gas sensor (29) and the warning lamp (9).
  • the respiratory gas flow is indicated by the directional arrows (35).
  • the double arrows (45) indicate the dividing line between the control unit (7) on the one hand and the blower unit (2) connected to the filter housing (20) on the other.
  • the horseshoe-shaped housing module (7) of the control unit is shown in the view as it is brought into contact with the blower unit (2) when it is in place.
  • Three contact pins (34) protrude from a recess (41) and form the connection connection to the contact pads (26).
  • the sample gas opening (30) continues to the sensor (29) and is surrounded by a silicone seal (42).
  • the delivery pressure inlet (32) is below and is also surrounded by a silicone seal (42).
  • the contour (43) of the housing module (7) adapted to the semi-cylindrical shape of the upper part (5) has a latching recess (44) into which a latching lug, not shown, of the blower unit (2) engages with its complementary shape.
  • the elevation (8) carries the warning lamp (9) on its undetectable rear side.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP92115316A 1991-10-07 1992-09-08 Gebläseunterstütztes Atemschutzgerät mit einem aufsetzbaren Steuerteil Expired - Lifetime EP0536546B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4133235A DE4133235A1 (de) 1991-10-07 1991-10-07 Geblaeseunterstuetztes atemschutzgeraet mit einem aufsetzbaren steuerteil
DE4133235 1991-10-07

Publications (2)

Publication Number Publication Date
EP0536546A1 EP0536546A1 (de) 1993-04-14
EP0536546B1 true EP0536546B1 (de) 1995-12-06

Family

ID=6442212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92115316A Expired - Lifetime EP0536546B1 (de) 1991-10-07 1992-09-08 Gebläseunterstütztes Atemschutzgerät mit einem aufsetzbaren Steuerteil

Country Status (3)

Country Link
US (1) US5303701A (enrdf_load_stackoverflow)
EP (1) EP0536546B1 (enrdf_load_stackoverflow)
DE (2) DE4133235A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021203264A1 (de) 2020-04-07 2021-10-07 Francesco Paolo Monteleone Atemschutzmaske
EP3892338A1 (de) 2020-04-07 2021-10-13 Francesco Paolo Monteleone Atemschutzmaske

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE102021203264A1 (de) 2020-04-07 2021-10-07 Francesco Paolo Monteleone Atemschutzmaske
EP3892338A1 (de) 2020-04-07 2021-10-13 Francesco Paolo Monteleone Atemschutzmaske

Also Published As

Publication number Publication date
US5303701A (en) 1994-04-19
DE4133235C2 (enrdf_load_stackoverflow) 1993-09-23
EP0536546A1 (de) 1993-04-14
DE59204588D1 (de) 1996-01-18
DE4133235A1 (de) 1993-04-08

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