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
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
  • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
• • 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
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B39/00—Evaporators; Condensers
  • F25B39/02—Evaporators
• • 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
  • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
• • 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
  • F25D23/00—General constructional features
  • F25D23/06—Walls
  • F25D23/061—Walls with conduit means
• • 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
  • F25D23/00—General constructional features
  • F25D23/02—Doors; Covers
  • F25D23/026—Doors; Covers for open-top cabinets
• • 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
  • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
  • F25D2400/10—Refrigerator top-coolers

Definitions

• the present invention refers to an improvement introduced in the refrigeration system of cabinets, such as those applied to horizontal freezers used for cooling or preserving beverages or other products and which comprise a cabinet provided with a top cover.
• cabinets such as those applied to horizontal freezers used for cooling or preserving beverages or other products and which comprise a cabinet provided with a top cover.
• Background of the Invention There are well known from the art the refrigerated cabinets provided with a top cover and in which the internal peripheral walls are formed in metallic sheet to operate as a heat exchange enhancing element for an evaporator which is usually defined by a tube seated against the external face of said internal peripheral walls, in a downward spiral development along at least part of the cabinet height.
• the upper end of the tube is connected to the expanding element of the refrigeration circuit, the lower end of said tube of the evaporator being maintained in fluid communication with the suction of the compressor that compresses the refrigerant fluid of the refrigeration system.
• the cabinet refrigeration systems arranged in the manner described above are deficient when the thermal load is replaced in a high frequency, which usually occurs when these cabinets are used as a beverage cooler or preserver.
• the lower region of the evaporator which is useless in terms of heat exchange by the fact that it receives only the already vaporized refrigerant fluid, is progressively reduced, making the evaporator to be also progressively more efficient.
• the improvement of the invention is introduced in a refrigeration system for a cabinet provided with a top cover and with internal peripheral walls, made of metallic sheet and around which is seated an evaporating means connected to the outlet of an expanding device (in its turn connected to a condenser) and to the suction of a compressor of the refrigeration system.
• the evaporating means comprises at least two tube extensions, each of them being seated around a respective height portion of the internal peripheral walls, and having a refrigerant fluid inlet end maintained in fluid communication with a respective expanding device and a refrigerant fluid outlet end maintained in fluid communication with the compressor.
• Figure 1 is a schematic lateral view of an internal peripheral wall of a cabinet associated with a refrigeration system provided with an evaporating means constructed according to the present invention. Description of the Preferred Embodiment
• the single figure of the enclosed drawing illustrates a lateral view of an internal peripheral wall P, in metallic sheet, of a parallelepipedic cabinet provided with a top cover (not illustrated) .
• an evaporating means 1 which in the illustrated example comprises two tube extensions 10, each of them being seated around a respective height portion of the internal peripheral walls P.
• each evaporator portion might be provided affixed around the internal peripheral walls P of the cabinet, each evaporator portion being defined by a respective tube extension 10 disposed in the same spiral development usually applied to this type of evaporating means which uses the internal peripheral walls P of the cabinet as heat exchange fins of the tube extensions, each evaporator portion being connected to an expanding device 2 of refrigerant fluid.
• Each tube extension 10 presents a refrigerant fluid inlet end maintained in fluid communication with the outlet of a respective expanding device 2, which in turn is connected to the outlet of a condenser 3 of the refrigeration system, and an outlet end of vaporized refrigerant fluid maintained in fluid communication with a compressor 4 of said refrigeration system.
• the evaporating means is replaced by two or more tube-type evaporators, which are arranged in parallel, each covering a portion of the cabinet height, thereby allowing a faster and more homogeneous cooling of the thermal load which will be placed in the cabinet.
• the parallel arrangement of the evaporators or tube extensions 10 allows the diameter of the capillary tube to be reduced, in order to define a cross- sectional area which is slightly smaller than a portion of the cross-sectional area of the prior art tube required to form the evaporating means with a single continuous tube extension, corresponding to the number of tube extensions 10.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36676181

Family Applications (1)

Country Status (4)

Families Citing this family (6)

Family Cites Families (18)

• 2003
  • 2003-11-28 BR BR0306232-5A patent/BR0306232A/pt not_active IP Right Cessation
• 2004
  • 2004-11-24 US US10/596,076 patent/US20070125120A1/en not_active Abandoned
  • 2004-11-24 WO PCT/BR2004/000234 patent/WO2005052469A1/en not_active Application Discontinuation
  • 2004-11-24 EP EP04797151A patent/EP1692438A1/en not_active Withdrawn

Non-Patent Citations (1)

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