Classifications

• • 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
  • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
  • F25D21/04—Preventing the formation of frost or condensate
• • 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
  • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
  • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
  • F25D17/042—Air treating means within refrigerated spaces
• • 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
  • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
  • F25D2317/04—Treating air flowing to refrigeration compartments
  • F25D2317/041—Treating air flowing to refrigeration compartments by purification
  • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification

Definitions

• a desiccant package according to the present invention includes an adsorbent, which can be any number of adsorbents, including clay, activated clay, wide pore or standard pore size silica gel, a salt, or molecular sieve.
• an adsorbent which can be any number of adsorbents, including clay, activated clay, wide pore or standard pore size silica gel, a salt, or molecular sieve.
• the constituents of the desiccant preferably are contained in a packet.
• the material making up the packet should be easily permeated by ambient water vapor. Some suitable materials would be any permeable, semi-permeable, micro-porous, or porous non-woven material, or other acceptable film.
• the presently preferred material is a porous non-woven, such as TYVEK ® .
• the formulation was placed in a TYVEK ® bag.
• the porosity of the packet will influence the adsorptive capacity of the desiccant composition. In particular, moisture will be more slowly adsorbed when the packet's pores are relatively smaller than when the pores are relatively larger. Using no packet will provide the greatest adsorptive rate.
• the desiccant package of the invention preferably operates in a range of temperatures from about -20°F to about 20°F, although the packages described above aiso wiii operate in a range of temperatures from about -40°F to about 30°F.
• the packages also are operable in environments having varied relative humidity ranging from about 20% to about 99%, but are preferably used between about 45% and about 55% relative humidity.
• the packet may adsorb moisture for from about 30 days to about 270 days.
• the preferable operating life of the desiccant preferably is from about 60 days to about 1 80 days. The life of the desiccant also will vary depending at least on the type of adsorbent or mixture used, the materials used, the relative humidity, and the temperature.
• the desiccant does not adsorb any more moisture than necessary to maintain a frost-free environment.
• Other embodiments also are contemplated in which it is desired that the relative humidity in the freezer by lowered substantially, e.g., to between 40% and 50%, to allow for quicker and/or more effective sublimation and water vapor adsorption.
• the composition of the packing also will have some bearing on the characteristics of the overall desiccant package.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Drying Of Gases (AREA)
• Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (2)

Family

ID=38656436

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (3)

Citations (2)

Family Cites Families (12)

• 2007
  • 2007-04-27 BR BRPI0710713-7A patent/BRPI0710713A2/pt not_active IP Right Cessation
  • 2007-04-27 MX MX2008013817A patent/MX2008013817A/es active IP Right Grant
  • 2007-04-27 WO PCT/US2007/067705 patent/WO2007127961A2/en not_active Ceased
  • 2007-04-27 EP EP07761524.3A patent/EP2013555A4/en not_active Withdrawn
  • 2007-04-27 CN CNA2007800233423A patent/CN101479543A/zh active Pending
  • 2007-04-27 RU RU2008146736/21A patent/RU2426959C2/ru not_active IP Right Cessation

Patent Citations (2)

Non-Patent Citations (1)

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