METHOD AND DEVICE FOR THE METERED RELEASE OF IRRITANTS

• US 20100127410A1
• Filed: 04/30/2008
• Published: 05/27/2010
• Est. Priority Date: 05/03/2007
• Status: Abandoned Application

• Current Assignee: Dräger, Karl-Heinz
• Original Assignee: Dräger, Karl-Heinz
• Inventors: Dräger, Karl-Heinz
• Application Number:
  US12/598,463
• Publication Number:
  US 20100127410A1
• Time in Patent Office: Days
• US Class Current: 261/1
• CPC Class Codes: B64D 45/0042 by spraying or injecting chemicals
• CPC Class Codes: G08B 15/02 with smoke, gas, or coloured or odorous powder or liquid

Abstract

The invention relates to a method and a device for the metered release of irritants by means of a propellant and/or solvent gas in anti-people defense rooms. The invention describes a method and a device for a metering controller for releasing irritants by means of a propellant and/or solvent gas in anti-people defense rooms while complying with health limits. After a first dose (T_E), subsequent dosages (T_N) are carried out in time intervals, so that both a hazardous limit of a concentration of the irritants in the room (1) is not exceeded and that also a sufficiently effective concentration is always met, and the concentration-lowering losses (S_F, S_V) arising from the agent, system and environment are compensated for. The concentration losses are detected metrologically and/or as parameter-dependent variables (S_F, S_v) and made available as a program solution of the control device (7).

Claims

1. A method of metered release of irritants by means of a propellent gas and/or solution gas in rooms for anti-personnel defence, in which the release of irritants is so controlled that after a first metering (TE) post-meterings (TN) are effected at time intervals so that both a health-endangering limit value of a concentration of the irritants in the room is not exceeded and also the concentration is not below a sufficiently effective concentration and the concentration-reducing losses (SF, SV) governed by the substance, installation and environment are compensated.

2. A method according to claim 1 characterised in that the concentration losses are ascertained by measuring technology and/or in the form of parameter-dependent values (SF, SV) and are made available as a program solution of a control device.

3. A method according to claim 2 characterised in that the parameter-dependent values (SF, SV) are ascertained from the kind of irritant, the irritant concentration, the irritant deposit, hydrologisation, the release amount per unit of time, the room size, the temperature of the propellent gas and/or the air movement in the room.

4. A method according to claim 1 characterised in that the temperature of the propellent gas is incorporated into the program control as a constantly changing measurement value (SV).

5. A method according to claim 1 characterised in that air exchange between the room and the surrounding air, which takes place through openings or by diffusion, is incorporated into the program control as a constantly changing measurement value (SV).

6. A method according to claim 5 characterised in that the air movement is determined by way of the air flow of a fan in an air conditioning and ventilation installation.

7. A method according to claim 5 characterised in that the air movement is ascertained by building physics or by a test.

15. A method according to claim 1 characterised in that:

the concentration losses are ascertained by measuring technology and/or in the form of parameter-dependent values (SF, SV) and are made available as a program solution of a control device;

the parameter-dependent values (SF, SV) are ascertained from the kind of irritant, the irritant concentration, the irritant deposit, hydrologisation, the release amount per unit of time, the room size, the temperature of the propellent gas and/or the air movement in the room;

the temperature of the propellent gas is incorporated into the program control as a constantly changing measurement value (SV); and

air exchange between the room and the surrounding air, which takes place through openings or by diffusion, is incorporated into the program control as a constantly changing measurement value (SV).

16. A method according to claim 15 characterised in that the air movement is determined by way of the air flow of a fan in an air conditioning and ventilation installation.

17. A method according to claim 15 characterised in that the air movement is ascertained by building physics or by a test.

8. A device for metered release of irritants by means of a propellent and/or solution gas in rooms for anti-personnel defence, having a discharge device comprising a storage container, a conduit system and at least one outlet nozzle actuable by way of a switchable valve, wherein

there is provided a control device having a computer and a timer for implementing an optimum irritant concentration in a room on the basis of measurement- and parameter-dependent values (SF, SV) of the spray device;

the discharge device includes a temperature measuring device for continuously detecting the temperature of the propellent gas; and

the measurement- and parameter-dependent values (SF, SV) which are processed by program technology in the computer can be fed to the timer and can be fed in the form of time intervals (TE) and (TN) to the valve for the control of opening and closing cycles.

9. A device according to claim 8 characterised in that the discharge device comprises a mixing installation for liquid gas as solvent and propellent gas and solvent and irritant in solution or a compressed gas bottle with a propellent gas solvent mixture and irritant in solution.

10. A device according to claim 8 characterised in that a thermostat is arranged in the conduit system of the spray device upstream of the outlet opening for temperature-dependent control of the through-flow of irritant.

11. A device according to claim 10 characterised in that the through-flow of the outlet opening is variable in dependence on the temperature and the variation in pressure linked thereto of the propellent or solution gas.

12. A device according to claim 10 characterised in that the discharge amounts which differ in dependence on the temperature and the variation in pressure linked thereto can be compensated by adaptation of the opening times of the release valve.

13. A device according to claim 10 characterised in that a pressure reducing device is provided to compensate for the temperature-induced variations in pressure of the propellent and/or solution gas to achieve equal discharge values.

14. A device according to claim 8 characterised in that an irritant concentration sensor is arranged to ascertain the irritant concentration.

18. A device according to claim 8 characterised in that:

the discharge device comprises a mixing installation for liquid gas as solvent and propellent gas and solvent and irritant in solution or a compressed gas bottle with a propellent gas solvent mixture and irritant in solution;

a thermostat is arranged in the conduit system of the spray device upstream of the outlet opening for temperature-dependent control of the through-flow of irritant; and

an irritant concentration sensor is arranged to ascertain the irritant concentration.

19. A device according to claim 18 characterised in that the through-flow of the outlet opening is variable in dependence on the temperature and the variation in pressure linked thereto of the propellent or solution gas.

20. A device according to claim 18 characterised in that the discharge amounts which differ in dependence on the temperature and the variation in pressure linked thereto can be compensated by adaptation of the opening times of the release valve.

21. A device according to claim 18 characterised in that a pressure reducing device is provided to compensate for the temperature-induced variations in pressure of the propellent and/or solution gas to achieve equal discharge values.