Method for cooling a refuge chamber in an emergency situation

Patent metadata

Field	Value
Publication number	US-10161248-B2
Application number	US-201414915697-A
Country	US
Kind code	B2
Filing date	Aug 20, 2014
Priority date	Sep 2, 2013
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A method for cooling a refuge chamber ( 100 ) with an emergency cooler ( 10 ) in an emergency situation includes cooling of a refrigerating agent ( 22 ) in a cold accumulator ( 20 ) with a cooling device ( 30 ) and detecting an emergency situation. Cold being stored in the refrigerating agent ( 22 ) of the cold accumulator ( 20 ) is released into the refuge chamber ( 100 )—the refrigerating agent ( 22 ) of the cold accumulator ( 20 ) is exposed for heat transfer with the refuge chamber ( 100 ).

First claim

The invention claimed is:

1. A method for cooling a refuge chamber by means of an emergency cooler, the method comprising the steps of:
providing a refrigerating agent in a cold accumulator with a cooling device, wherein the cold accumulator is positioned in or adjacent to the refuge chamber with one or more openings providing direct communication between an interior of the cold accumulator, and the refrigerating agent therein, and an interior of the refuge chamber and wherein one or more flaps close the one or more openings and are manually openable to establish the direct communication between an interior of the cold accumulator, and the refrigerating agent therein, and an interior of the refuge chamber;
providing a standby operation comprising cooling the refrigerating agent in the cold accumulator to a desired minimum temperature or maintaining the refrigerating agent in the cold accumulator in a range of the minimum temperature;
detecting an emergency situation during the standby operation and switching from the standby operation to an emergency situation operation; and
during the emergency situation operation releasing cold being stored in the refrigerating agent of the cold accumulator into the refuge chamber, wherein the emergency situation may include a disconnection from a power supply wherein upon the disconnection from a power supply, the step of releasing cold being stored in the refrigerating agent of the cold accumulator comprises manually opening the one or more flaps to establish the direct communication between the interior of the cold accumulator, and the refrigerating agent therein, and an interior of the refuge chamber.

2. A method in accordance with claim 1 , wherein the step of cooling the refrigerating agent also takes place during emergency situation operation with a maintained connection with the power supply or upon a reconnection with the power supply.

3. A method in accordance with claim 1 , wherein the step of cooling the refrigerating agent takes place, furthermore, simultaneously with the step of releasing cold being stored during emergency situation operation when an energy supply for the cooling device is at least partly still available.

4. A method in accordance with claim 1 , further comprising:
providing a condenser within the refuge chamber and operatively connected to the cold accumulator; and
the emergency situation operation further comprises allowing circulation of the refrigerating agent through the condenser, whereby moisture in air within the refuge chamber condenses on the condenser reducing air humidity of the refuge chamber.

5. A method in accordance with claim 4 , further comprising:
collecting liquid water of condensation, from the moisture in air within the refuge chamber that condenses on the condenser, during the emergency situation operation comprising allowing circulation of the refrigerating agent through the condenser; and
making the water of condensation available in the refuge chamber as emergency drinking water.

6. A method in accordance with claim 5 , wherein water, which is additionally available as drinking water in the emergency situation, is also used as the refrigerating agent.

7. A method in accordance with claim 1 , wherein the release of the cold is effected by at least one of the following mechanisms:
free or forced convection of the air in the refuge chamber or both free and forced convection of the air in the refuge chamber, and
free or forced convection of the refrigerating agent or both free and forced convection of the refrigerating agent.

8. A method in accordance with claim 1 , wherein the cooling device is switched off automatically when the emergency situation is detected.

9. An emergency cooler for cooling a refuge chamber in an emergency situation, the emergency cooler comprising:
a cold accumulator positioned in or adjacent to the refuge chamber;
a refrigerating agent arranged in the cold accumulator, wherein the cold accumulator comprises one or more openings providing direct communication between an interior of the cold accumulator, and the refrigerating agent therein, and an interior of the refuge chamber;
a cooling device for cooling the refrigerating agent; and
a releasing device for releasing the cold being stored in the refrigerating agent of the cold accumulator into the refuge chamber, the releasing device comprising one or more flaps closing the one or more openings, the one or more flaps being configured as manually openable one or more flaps to establish the direct communication between the interior of the cold accumulator, and the refrigerating agent therein, and an interior of the refuge chamber.

10. An emergency cooler in accordance with claim 9 , further comprising:
a condenser comprising at least one condensation plate disposed within the refuge chamber and in direct contact with air within the refuge chamber; and
a refrigerating agent circulating arrangement providing a free or forced convection of the refrigerating agent to circulate refrigerating agent from the cold accumulator to the condenser and from the condenser back to the cold accumulator, whereby moisture from the air in the refuge chamber is condensed on the condenser by means of the cold being stored in the refrigerating agent of the cold accumulator being circulated through the condenser.

11. An emergency cooler in accordance with claim 9 , wherein the releasing device further comprises at least one distributing element for an active distribution of the cold being stored for releasing the cold being stored into the refuge chamber.

12. An emergency cooler in accordance with claim 9 , wherein at least one of the following media is used as the refrigerating agent in the cold accumulator:
water
brine
dry ice.

13. An emergency cooler in accordance with claim 9 , wherein the cold accumulator is configured as a stratified accumulator allowing temperature stratification of the refrigerating agent within the cold accumulator.

14. An emergency cooler in accordance with claim 9 , further comprising a detection device detecting an emergency situation, wherein:
the cooling device comprises a heat exchanger connected to the cold accumulator for heat exchange with the refrigerating agent and a refrigerating medium circulated within the heat exchanger, which refrigerating medium can release cold to the refrigerating agent in the cold accumulator via the heat exchanger; and
the cooling device is switched off automatically when the emergency situation is detected by the detection device, whereby the one or more flaps are manually openable to establish the direct communication between the interior of the cold accumulator, and the refrigerating agent therein, and an interior of the refuge chamber.

15. A refuge chamber cooling system comprising:
a cold accumulator;
a liquid refrigerating agent arranged in the cold accumulator;
a powered cooling device for cooling the refrigerating agent;
a heat transfer arrangement for heat exchange between the refuge chamber and the refrigerating agent, the heat transfer arrangement comprising a cooler disposed within the refuge chamber with the liquid refrigerating agent circulating between the cold accumulator and the cooler whereby heat within the refuge chamber is taken up by the refrigerating agent; and
a detection device detecting an emergency situation to activate the heat transfer arrangement for heat exchange between refuge chamber and the refrigerating agent.

16. A refuge chamber cooling system in accordance with claim 15 , wherein the powered cooling device cools the refrigerating a

Assignees

• Draeger Safety Ag & Co Kgaa

Inventors

• Bode Christian
• Neervoort Sven
• Kiewitt René

Classifications

• F25D3/045

  Details · CPC title

• F25D16/00

  Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery · CPC title

• E21F11/00 Primary

  Rescue devices or other safety devices, e.g. safety chambers or escape ways (breathing aids for curative purposes A61H31/00; respiratory apparatus A62B7/00; breathing apparatus for accidentally buried persons A62B33/00) · CPC title

• E21F3/00

  Cooling or drying of air (air-conditioning rooms or spaces in general F24F) · CPC title

• Y02E60/14

  Thermal energy storage · CPC title