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WO2009056296A1 - Système de refroidissement et procédé permettant le refroidissement de vêtements personnels utilisant des liquides cryogéniques - Google Patents

Système de refroidissement et procédé permettant le refroidissement de vêtements personnels utilisant des liquides cryogéniques Download PDF

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Publication number
WO2009056296A1
WO2009056296A1 PCT/EP2008/009133 EP2008009133W WO2009056296A1 WO 2009056296 A1 WO2009056296 A1 WO 2009056296A1 EP 2008009133 W EP2008009133 W EP 2008009133W WO 2009056296 A1 WO2009056296 A1 WO 2009056296A1
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Prior art keywords
cryogenic liquid
cooling
porous
cooling system
fibrous material
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Ceased
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PCT/EP2008/009133
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English (en)
Inventor
Wolfgang Obert
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Individual
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Individual
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Publication of WO2009056296A1 publication Critical patent/WO2009056296A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
    • A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
    • A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
    • A41D13/0053—Cooled garments
    • A41D13/0056—Cooled garments using evaporative effect
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/002—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment
    • A41D13/005—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with controlled internal environment with controlled temperature
    • A41D13/0053—Cooled garments
    • A41D13/0055—Cooled garments by means of dry ice
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/0518—Chest
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
    • A62B17/005—Active or passive body temperature control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F25D3/107—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air portable, i.e. adapted to be carried personally
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H1/00—Personal protection gear
    • F41H1/02—Armoured or projectile- or missile-resistant garments; Composite protection fabrics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H1/00—Personal protection gear
    • F41H1/04—Protection helmets

Definitions

  • the present invention relates to a device and method for cooling personal garments.
  • the present invention relates to a device and for cooling personal suits or clothes using a cryogenic liquid and a garment implementing said device and method for personal cooling.
  • Cryogenic liquids or solids are widely used for cooling and the provision of dry, inert gases.
  • Liquid nitrogen as it is the most widely used commercial cryogenic liquid, and is safe and relatively simple to handle with some basic precautions, is the most suitable cryogenic liquid for cooling applications.
  • the term "liquid nitrogen” is used for any cryogenic liquid or mixture of cryogenic liquids which can be used for cooling.
  • Nitrogen is the most abundant element in the Earth's atmosphere, of which it forms 78% thereof. Nitrogen exists at ambient pressure and at -198° C in a two phase gaseous/liquid state.
  • the cooling capacity of liquid nitrogen is considerable: liquid nitrogen has a heat of evaporation at ambient pressure of 199 kJ/kg and the enthalpy of the evaporated gas to warm up to ambient temperature is 234 kJ/kg. That equals to a total of 433 kJ/kg. If the nitrogen is adsorbed in a porous material, the desorption enthalpy is in the range of additional several hundreds of kJ/kg depending on the specific sorption property of the material. The total cooling capacity of 1 litre of liquid nitrogen can therefore exceed 1000 kJ/kg. Liquid nitrogen is produced on an industrial scale for a wide range of applications, and is readily available in most industrialised countries. It is an inert, non-toxic, non-flammable, relatively inexpensive cryogenic liquid which provides a high cooling capacity.
  • Liquid nitrogen usually needed to be stored in heavy, bulky and well-insulated containers called Dewars. These containers may be pressurised and allow a small amount of evaporation of nitrogen in order to prevent the dangerous (and ultimately explosive) pressurisation of the container.
  • cryogenic liquids such as liquid nitrogen as an active coolant
  • the known devices and methods using cryogenic liquids such as liquid nitrogen as an active coolant generally are constrained by several issues. Heavy insulated containers are required to safely contain the liquid nitrogen and prevent fast evaporative losses. The vigorous evaporation and ultra-low temperatures make the handling and use of liquid nitrogen normally very difficult. Specialised handling equipment, including cryogenic gloves and safety glasses, is required to prevent injuries such as burns and frostbite caused by splashing and exposure. Low air temperatures arising from the proximity of liquid nitrogen may cause hypothermia.
  • Active cooling systems based on electrically operated systems are bulky and heavy, and systems with built in cooling apparatus are heavy and provide low levels of inherent cooling capacity.
  • Other known cooling systems for clothing include ice packs placed into fabric pockets, which packs are heavy, of limited duration and low cooling power. Dry ice/solid carbon dioxide packs are heavy, and have low cooling power.
  • Battery driven fan systems perform for only a short period of time, require an external power source, are heavy, and only introduce air at an ambient (not cooled) temperature that may be additionally heated by the engine as it is introduced into the system.
  • Phase change systems have a low cooling capacity, a short duration and require recharging.
  • Cylinder driven cooling systems have a low cooling capacity, perform for a limited duration and are very heavy.
  • WO 2007/128823 A2 describes "a cooling system by contact, comprising a cooling fluid to cool a body or object, and at least a cold transmission surface in direct or indirect contact with said body or object comprising at least a device for storing and collecting frigories (negative calories) that can receive a preset quantity of cooling fluid from an external charging device, store said frigories and transmit them at a preset velocity and temperature to said cold transmission surface.
  • Patent WO 00/75558 A3 describes "a shaped article capable of at least one of containing and delivering a cryogenic fluid, said article having a porous structure that restricts the passage of cryogenic fluid in the liquid phase while permitting the passage of cryogenic fluid in the gaseous phase.”
  • This patent requires a complex tubing system and a control system for a two phase flow condition (mixed gaseous and liquid nitrogen) which is very complex and impractical.
  • most of the liquid will leave the tube at the outlet of the tubular cooling system and is not available for cooling. Therefore, the system will suffer from an extremely inefficient use of the coolant.
  • An alternative way to handle liquid nitrogen which is proposed by this invention, is in the form trapping the cryogenic liquid in the pores of highly porous materials.
  • Liquid Nitrogen like water or any other liquid, can be stored in a sponge-like porous materials.
  • GB-A-2377985 describes a disposable rigid container for shipping human or animal tissue filled with liquid refrigerant such as liquid nitrogen which is absorbed by a spongy or granular material.
  • the proposed invention overcomes these disadvantages by providing dry nitrogen gas vent flow from a non pressurized system with an automatic release and simultaneously a cold source, which is unique and not utilised by the cooling systems described above.
  • the invention seeks to alleviate the disadvantages of using liquid nitrogen and/or other cryogenic liquids in a pure liquid form by enabling their storage and transport in innovative materials and forms.
  • the present invention addresses the above mentioned disadvantages by a device for cooling a garment with the features as defined in the independent apparatus claim. According to another aspect the present invention addresses the above mentioned performance and design issues by a method for cooling a garment with the features as defined in the independent method claim.
  • the present invention provides a cooling system using a cryogenic liquid, characterized by a porous or fibrous material adapted to incorporate said cryogenic liquid.
  • the present invention provides a method for cooling a garment using a cryogenic liquid, comprising the steps of providing by a porous or fibrous material adapted to incorporate a cryogenic liquid, incorporating said cryogenic liquid in said porous or fibrous material, gradually releasing or dispensing of said cryogenic liquid from said porous or fibrous material, and generating cooling effect by evaporation of said cryogenic liquid.
  • the invention uses, but is not limited to, liquid nitrogen for the cooling of personal clothing and other applications though an innovative method of storage that provides the desired considerable cooling power or temperature lowering abilities together with the provision of cooling dry vent gas, but eliminates the risk of spillage and makes the handling of this ultra-cold material safe.
  • Said dry vent gas is generated by evaporation of said cryogenic liquid.
  • cryogenic liquid which means a liquid having a boiling point below about -60 0 C is interchangeable with, but not limited to, liquid nitrogen which is the main applicable cryogenic liquid in this invention.
  • the invention provides the safe and efficient handling of the cryogenic liquid through the trapping in an suitable adsorption material, where it is safely stored like water in a sponge and from where is it released in a safe and controlled manner. This way, it provides cooling and at the same time a highly efficient flow of dry gas for the sweat removal of the wearer of the garment.
  • the same principle is suitable for many other applications such as in protective clothing where efficient cooling without active cooling apparatus is required.
  • the evaporation of 1 litre of liquid nitrogen generates about 800 litres of dry nitrogen gas.
  • this dry nitrogen gas flow removes an estimated 800 litres of water vapour.
  • cooling capacities in the range of up to 1 kW for the evaporation/ desorption of liquid nitrogen and a vent flow of dry nitrogen of up to 800 litres (stp) can be expected from the desorption/evaporation of 1 litre of liquid.
  • the invention provides an innovative storage system that enables a safe, slow and relatively constant release of the cooling power of the liquid nitrogen's evaporation i) without the need for bulky and heavy pressurised or heavily insulated containers, ii) in an easy to handle, safe form, and iii) without the associated dangers of spillage or potential injury from splashing.
  • liquid nitrogen may be stored in flexible fabric pockets/compartments of various sizes made of a thin wall, lightweight, leak proof and highly flexible material suitable for integration into clothing.
  • the present invention provides a device and a method for cooling personal garment, wherein only small amounts of liquid nitrogen may be used. Due to said small amounts of liquid nitrogen it can be carried more easily by a person and the risk of asphyxiation is avoided.
  • liquid nitrogen may be trapped inside the pores of a suitable porous material, including activated charcoal, zeolites (molecular sieves), vermiculite, bentonite, sodium activated bentonite, and/or other compounds such as freeze/vacuum-dried granules as used in the food industry e.g. coffee or milk, various forms of dust, powder, micro-fibre fabrics with high surface areas, solid porous or foam-like materials, other similar porous materials or combinations of such materials.
  • the cryogenic liquid is trapped in a fabric, including but not limited to aerogels, microfibre cloths, felt, chamois leather and other similar materials.
  • liquid nitrogen in a suitable felt material formed from aerogels or cellulose fibres liquid nitrogen can be stored with a density close to that of the pure liquid nitrogen - although it is "trapped” or “fixed” in a kind of solid-state in the porous felt and is released in proportional to the heat influx from the outside. This way the release rate of the trapped liquid nitrogen can be controlled in a simple and effective way.
  • the present invention can be used in any clothing systems and situations where heat stress is a particular issue.
  • the present invention may be used, but not limited to, in military combat uniforms and armour systems, military non- combat systems, police body armour, nuclear/biohazard/chemical (NBC) suits, general chemical protection suits, mining, petrochemical and heavy industrial clothing systems, fire protective equipment and clothing systems, maritime and naval clothing systems, armoured vehicle driver clothing systems, industrial vehicle driver clothing systems, medical patient and bio-material cooling systems, cooling systems for sports injury and recuperation, all forms of racing vehicles and other systems and situations where are person or machinery operate in hostile environments such as high temperature and humidity environments.
  • NBC nuclear/biohazard/chemical
  • Figure 1 shows a schematic application of a device according to an embodiment of the present invention.
  • Figure 2 shows another schematic illustration with a cross section of a device according to an embodiment of the present invention illustrating the key processes involved.
  • Figure 1 is a schematic sectional view of the central part of a cooling system for a garment according to an embodiment of the invention including for example personal body armour.
  • the invention is not limited to clothing and extends to other applications requiring cooling.
  • FIG. 2 is a schematic illustration showing an exemplary application of a cooling system according to an embodiment of the present invention.
  • the cooling system according to an embodiment of the present invention comprises:
  • additional outer cover such as radiation shield, protective armour etc.
  • Fixation device to attach to a garment such as Velcro
  • the total assembly may have a typical thickness between 5 - 7 cm, whereas the central storage part has a thickness of typically 2-3 cm. This way an effevtive autonomous performance time in the range of 4h can be guaranteed.
  • the design can be applied for the full garment or alternatively as an attached module to the inside of a garment as shown on the right hand part of the drawing.
  • the central storage of the cryogenic liquid 1.1 can be made from a glued multilayer assembly of suitable felt or fabric or by filling a suitable pouch with sorption powder or granules. Aerogels offer a particularly high sorption rate capacity, close to that of liquid nitrogen.
  • the leak tight envelopes 1.2 are pouches welded from a thin walled PE or Teflon or polycarbonate or equivalent film, typically 0.1 mm thick which remains flexile at cryotemperatures. They are paramount in order to minimize the heat losses due to convection towards the bottom end of the assembly.
  • the dry nitrogen boil off gas 1.6 is forced to leave the assembly via the top from where it can freely flow down along the body and provide active cooling. Due to the thermal insulation and the sorption capacity of the sorption material the flow of the vent gas is reduced to a level that is completely safe and avoids any potential cold burns. The released dry nitrogen flow 6 will provide additional cooling so far as it has the capability to remove the moisture of the sweat this way supporting the natural cooling mechanism of the body.
  • the thermal insulations 1.3 are high performance insulation felts made from suitable fabrics. Very high performance values can be obtained by using aerogels. This insulation will slow down the evaporation of the trapped liquid nitrogen and prolong the duration of the cooling function.
  • the thermal insulation layers 1.3 may also serve as a thermal insulator of the body against the cold surfaces of the liquid nitrogen storage element.
  • the layer 1.4 is the outer cover and may act as comfort layer on the inner body side by using a soft velvet or similar fabric and may be reinforced by a layer 5 on the outer side depending on the application.
  • the outer layer 1.5 can include a heat shield, designed to reflect solar or other thermal radiation and thermal inputs, and a multi layer heat sink/ insulation layer 1.3 for absorbing and minimising any thermal input that penetrates past the outer heat shield. These combine to minimise external thermal input into the storage volume with the trapped nitrogen.
  • the outer heat shield layer 1.5 may be made of materials with high thermal insulation properties and on the outside covered with a top material layer of fabric, including camouflaged ballistic nylon with infrared reflective dyes for military versions.
  • a version of this invention may be made without a heat shield layer in some specific circumstances where external radiation is low.
  • soft body armour made of layers of aromatic polyamide (Aramid ®) fabrics may also act as the multi-level outer heat shield layer 1.5 as well as providing ballistic protection against small arms fire and various forms of shrapnel.
  • This protective material will offer increased ballistic protection when subjected to cryo-temperatures.
  • An optional addition are hard ceramic plates arranged at the outer heat shield layer 5 to the front and/or back of the armour to stop the penetration of high- powered rifle impact which further adds to the thermal insulation.
  • This protective material will display increased ballistic protection when subjected to cryo-temperatures.
  • the setup is closed by a flap 1.7 which guides the passage of the dry nitrogen boil off towards the body I order to provide the additional cooling by moisture removal.
  • the complete device can be easily fixed and/or removed by a simple fixation device such as Velcro strips 1.8.
  • FIG. 2 shows an exemplary application of a cooling system according to an embodiment of the present invention.
  • a cooling system according to an embodiment of the present invention.
  • cooling modules or assemblies are be integrated in an existing protective garment.
  • the cooling assembly 2.1 can be easily attached to the inner of the garment
  • the modules can be shaped to any requirement.
  • a typical size would be a module with a dimension of 15x30x56 cm.
  • the number of modules can be adjusted to the specific requirements of the application.
  • the modules comprise a porous or fibrous material 1.1 adapted to incorporate a cryogenic liquid, e.g. liquid nitrogen. After incorporation of said cryogenic liquid in said porous or fibrous material, a gradual releasing or dispensing of said cryogenic liquid from said porous or fibrous material can take place. This gradual releasing or dispensing leads to evaporation of the cryogenic liquid which generates a cooling effect, cooling power or cooling energy.
  • a cryogenic liquid e.g. liquid nitrogen
  • the cooling effect generated by the modules can be controlled by adjusting the tightness of a garment belt 1.4.
  • the present invention takes advantage of the cooling effect of dry nitrogen. Furthermore, the vent flow of the cooling liquid can even remove the water out of the garment due to body transpiration.
  • liquid nitrogen can be stored by being trapped in porous materials including activated charcoal, zeolites (molecular sieves), bentonite, sodium activated bentonite, vermiculate and/or other compounds such as freeze/vacuum-dried granules as used in the food industry e.g. coffee or milk, various forms of dust, powder, micro-fibre fabrics with high surface areas, solid porous or foam-like materials, other similar porous materials and combinations of such materials.
  • porous materials including activated charcoal, zeolites (molecular sieves), bentonite, sodium activated bentonite, vermiculate and/or other compounds such as freeze/vacuum-dried granules as used in the food industry e.g. coffee or milk, various forms of dust, powder, micro-fibre fabrics with high surface areas, solid porous or foam-like materials, other similar porous materials and combinations of such materials.
  • porous material can store more than its own volume of liquid like a sponge.
  • the release of nitrogen in the form of gas is similar to the evaporation from the liquid form but much more controlled and far less hazardous.
  • the amount of gas released is determined by the heat influx into the liquid nitrogen storage containers.
  • the storage of liquid nitrogen in porous materials will slow the release of the coolant, thus extending the duration of the cooling effect. This is due to two effects:
  • the additional desorption enthalpie requires a higher thermal load for the same evaporation rate compared to pure liquid and in addition the thermal insulation property of the porous material reduces the thermal input. Due to the inherently positive thermal insulation properties of porous materials, the gas will be released gradually. Uncontrolled or sudden bursts or spillage of gas will not occur.
  • vermiculite Essentially vermiculite is a member of the phyllosilicate group of minerals, and resembles mica. It is well known for its thermal insulation characteristic and widely used for domestic thermal insulation. It is also widely used as soil conditioning material. It is well known as extremely porous and has considerable sorption performance.
  • Zeolites is the name of a variety of minerals with a microporous structure. Primarily composed of hydrated alumina-silicate minerals, zeolites are part of the family of micro-porous solids known as molecular sieves. Molecular sieves are able to selectively sort molecules based on a size exclusion process due to their ultra regular molecular pore structure. In essence they are able to regulate the type of molecules that can enter the pores by the diameter of their tunnels. Zeolites can be produced to a wide range of pore sizes and distributions, and have therefore excellent potential for of "solid" cryogenic liquid storage. 3.
  • Bentonite, and sodium activated bentonite are an absorbent aluminium phyllosilicate generally impure clay consisting mostly of montmorillonite.
  • swelling bentonite which is also called sodium bentonite and non-swelling bentonite or calcium bentonite.
  • Sodium bentonite expands when wet, absorbing several times its dry mass in a variety of liquids. This material also displays excellent potential for "solid" cryogenic liquid storage. The storage of liquid nitrogen in porous materials will slow the release of the coolant, thus extending the duration of the cooling effect.
  • Aerogel is a low-density solid-state material derived from gel in which the liquid component of the gel has been replaced with gas. The result is an extremely low density solid with several remarkable properties, most notably its effectiveness as a thermal insulator. Aerogels are produced by extracting the liquid component of a gel through supercritical drying. This allows the liquid to be slowly drawn off without causing the solid matrix in the gel to collapse from capillary action, as would happen with conventional evaporation. This highly porous material has a very high sorption capacity and can be obtained integrated in a felt type fabric.
  • Choice of best sorption material is determined by several properties:
  • the sorption material shall be durable and reusable with no ageing behaviour. While granules and powders have to be filled in bags or poaches which tend to become circular and therefore stiff and bulky and tend to sag there is the use of felt type fabrics very advantageous so far that it allows to produce flexible thick stable sorption packages by simply gluing individual sheets together to the desired thickness. Excellent results have been obtained by fibre and aerogels felts, both of which fulfil the above requirements well.
  • the porous material such as granules or felts of various kinds may be baked at a temperature in the region of 15O 0 C in order to remove any residual trapped particles and to maximise this way the sorption capacity of the material.
  • Convection In order to avoid excessive loss of cryogenic liquid by convection at the bottom of the system, it is paramount to have leak tight barriers around the sorption pack. These are pouches welded from a thin walled PE or Teflon or polycarbonate or equivalent film, typically 0.1 mm thick which remains flexile at cryotemperatures. Multilayer: The use of several insulation layers is advantageous, in particular, if additional convection barriers are integrated
  • Modular design Although one configuration of the invention involves integrating the cooling system into a garment, a modular design provides series of advantages.
  • the modules are flexible, and can be shaped to any requirement.
  • a typical size would be a module with a dimension of 15x30x6 cm (width, height, depth).
  • Control can be tuned by variation of the tightness of the garment by fastening or releasing the belt pressure.
  • the cooling mechanism is based on several processes
  • garments incorporating armour such as breastplates etc. They also refer to any fabric, flexible or inflexible solid structures used for cooling.
  • Clothing in which the present invention can be used includes, but is not limited to, military combat uniforms and armour systems, military non-combat systems, police body armour, nuclear/biohazard/chemical (NBC) suits, general chemical protection suits, mining, petrochemical and heavy industrial clothing systems, fire protective equipment and clothing systems, maritime and naval clothing systems, armoured vehicle driver clothing systems, industrial vehicle driver clothing systems, medical cooling systems, cooling systems for sports injury and recuperation, all forms of racing vehicles and other systems and situations where are person or machinery operate in high and humid environments. They also refer to any other clothing and body protection such as helmets.
  • NBC nuclear/biohazard/chemical
  • cooling apparatus includes cooling devices for electronic equipment; cooling devices for computer and server equipment; integrated electronic device cooling; and cooling devices for robotic and electrical devices.
  • the invention provides safe handling of highly efficient "solid" cryogenic liquid for all food applications, simultaneously providing cooling and inert protective gas. It also provides cooling systems for road, air, rail and maritime transport systems and cooling systems for sea freight containers.
  • Medical applications of the invention include transport for organs and other bio- materials and cooling systems to aid recuperation from heat injuries and other injuries.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Textile Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Toxicology (AREA)
  • Emergency Management (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)

Abstract

La présente invention concerne un système de refroidissement utilisant un liquide cryogénique, caractérisé par un matériau poreux ou fibreux adapté pour incorporer ledit liquide cryogénique. De plus, la présente invention concerne un procédé permettant le refroidissement d'un vêtement qui utilise un liquide cryogénique, comprenant les étapes consistant à fournir un matériau poreux ou fibreux adapté pour incorporer ledit liquide cryogénique, incorporer ledit liquide cryogénique dans ledit matériau poreux ou fibreux, libérer ou administrer progressivement ledit liquide cryogénique à partir dudit matériau poreux ou fibreux, générer un effet de refroidissement par évaporation dudit liquide cryogénique.
PCT/EP2008/009133 2007-10-30 2008-10-29 Système de refroidissement et procédé permettant le refroidissement de vêtements personnels utilisant des liquides cryogéniques Ceased WO2009056296A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0721298.8 2007-10-30
GB0721298A GB2458097A (en) 2007-10-30 2007-10-30 Cooling using cryogenic liquids

Publications (1)

Publication Number Publication Date
WO2009056296A1 true WO2009056296A1 (fr) 2009-05-07

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WO2016053266A1 (fr) * 2014-09-30 2016-04-07 Benyaminpour Behrouz Système thérapeutique portatif à l'aide de température chaude ou froide
US10172739B2 (en) 2012-07-12 2019-01-08 Behrouz Benyaminpour Portable therapeutic system using hot or cold temperature
WO2019083448A1 (fr) * 2017-10-23 2019-05-02 Global Healthcare Sg Pte. Ltd. Support d'unité de transfert de chaleur portable et détachable
US11425944B2 (en) 2018-08-30 2022-08-30 Nike, Inc. Flexible cooling garment system
US20220279870A1 (en) * 2019-08-21 2022-09-08 Cardinal Engineering Llc Extremity heater
US11506441B2 (en) * 2017-12-22 2022-11-22 Cronin Group Pty Ltd Cooling device and methods of forming and regenerating same
US11684094B2 (en) 2018-08-30 2023-06-27 Nike, Inc. Flexible cooling garment system

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CN105664809A (zh) * 2016-01-29 2016-06-15 卓达新材料科技集团有限公司 一种毛毡/硅铝气凝胶复合保温板的超临界干燥方法
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