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
  • F25B41/00—Fluid-circulation arrangements
  • F25B41/30—Expansion means; Dispositions thereof
  • F25B41/37—Capillary tubes
• • 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
  • F25D23/006—General constructional features for mounting refrigerating machinery components
• • 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
  • F25B2500/00—Problems to be solved
  • F25B2500/01—Geometry problems, e.g. for reducing size

Definitions

• the present invention relates to a refrigeration appliance, in particular a domestic refrigeration appliance, comprising a heat-insulating housing enclosing a storage chamber for refrigerated goods and a refrigerant circuit comprising a compressor, a condenser, a throttle and an evaporator cooling the storage chamber.
• a refrigeration appliance in particular a domestic refrigeration appliance, comprising a heat-insulating housing enclosing a storage chamber for refrigerated goods and a refrigerant circuit comprising a compressor, a condenser, a throttle and an evaporator cooling the storage chamber.
• the extent of adiabatic cooling depends on the pressure difference passed between condenser and evaporator. The warmer the refrigerant is at the outlet of the condenser, the warmer it gets even after the relaxation in the
• the condenser outlet as close as possible to the temperature of the environment to which the condenser gives off its heat to approach, but the smaller the temperature difference should be, the larger the required dimensions of the condenser. Cooling achievable at the condenser is also limited by parasitic heat transfer between warm, upstream regions of the condenser and cooler downstream regions. When a downstream portion of the condenser is surrounded by air already at upstream portions of the condenser
• Condenser is heated, it can no longer cool the refrigerant below the temperature of this air.
• a frame heater is provided to prevent condensation on the housing in the vicinity of a mounted between the body and door of the housing seal.
• a frame heater includes a tube which is inserted in the refrigerant circuit between the compressor and condenser or downstream of the condenser to the compression heat of the refrigerant, the condensation-prone surfaces of the housing over the
• Object of the present invention is to improve the energy efficiency of a refrigerator, in particular a household appliance.
• the object is achieved by the throttle is arranged at least partially on a side wall of the housing in a refrigerator of the type defined above.
• the throttle contributes little to the volume of the refrigerant circuit due to its small compared to other areas of the refrigerant circuit free cross section and therefore does not appreciably increase the amount of refrigerant required to operate the refrigerant circuit.
• Due to the arrangement on the side wall the throttle is protected against waste heat released by the condenser, which is generally arranged at the back of the device.
• the side wall is therefore a relatively cool region of the refrigerator housing and allows for effective additional cooling of the circulating through the throttle refrigerant.
• the throttle is preferably protected and not visible from the outside in the side wall between an outer skin and an insulating layer thereof.
• the outer skin of the side wall is preferably metallic.
• the choke is preferably glued to the outer skin to ensure that it remains in heat-conducting contact with the outer skin when the insulating layer is applied during assembly of the refrigerator.
• the insulating layer is formed in a customary manner, preferably by expanding resin foam in a bounded by the outer skin cavity of the housing.
• a quick and easy bonding of the throttle and the outer skin is possible with the help of adhesive tape.
• preferably only an upstream section of the throttle is arranged on the side wall.
• a downstream portion of the throttle may be routed in a manner known per se in a suction pipe leading from the evaporator to the compressor.
• this upstream section is the volume of the
• the upstream section has a free diameter of less than 1 millimeter.
• the upstream portion preferably has a length of at least 1 meter. In practice, with a normal size household refrigerator, the length of the upstream section will be up to 2 meters.
• Insulating layer of the side wall are joined together.
• the refrigerant circuit has a dryer whose feed line for refrigerant is fluidically connected to the upstream end of the throttle on the side wall.
• Fig. 1 is a perspective view of an inventive
• FIG. 2 perspective view of the refrigerator from behind;
• FIG. 3 shows a plan view of a sheet-metal blank forming an outer skin of a side wall of the refrigeration device with a throttle section attached thereto;
• Fig. 4 is a diagram of the refrigerant circuit of the refrigerator.
• Figures 1 and 2 show perspective views of a household refrigeration appliance 1 in table construction.
• a heat-insulating housing of the device is composed of a substantially cuboidal body 2 and a door 3, which together define a storage chamber 4.
• the body 2 has a known construction with a deep-drawn plastic inner container 5, a composite of several elements together outer skin and an intermediate space between the inner container 5 and the outer skin filling insulating polyurethane foam.
• the elements of the outer skin include two each over a side wall of the body 2
• a machine room 8 is recessed near the bottom, which receives a refrigerant compressor 9.
• a condenser 10 is connected to a pressure port of the compressor 9.
• the condenser 10 is shown in FIG. 2 as a wire tube heat exchanger mounted on a rear wall of the body 2 above the engine room 8; Other constructions of the condenser 10, in particular as a compact, likewise accommodated in the machine room 8 and forcibly cooled by a fan finned heat exchanger are also considered.
• a downstream connection of the condenser 10 is connected via a sleeve 1 1 with a
• Throttle tube 12 is connected, which is looped on the insulating layer
• the sleeves 11, 16 make it possible to assemble the device 1 by, before the sheet metal blanks 6 are assembled with the inner container to attach the throttle 12 to one of the sheet metal blanks 6, the body 2 together so that the ends of the throttle 12 in the engine room lie free, then froth the body and finally to insert the throttle 12 with the aid of the sleeves 11, 16 in the refrigerant circuit.
• Fig. 3 shows a perspective view of the inside of the sheet metal blank 6 with the throttle tube 12.
• the blank 6 comprises a flat central plate 13, which is provided to form the outer skin of a side wall of the body 2, and at which the throttle tube 12 by means of of adhesive tape strip 14 is attached. From the central plate 13
• Angled webs 15 extend in the assembled device 1 on the front frame 7 and its back, and are there with the
• Inner container 5 and a (not shown) rear wall plate foam-tight manner are provided.
• Fig. 1 connects a second arranged in the engine room 8 sleeve 16, the throttle tube 12 with a second, narrower throttle tube 17, the
• Insulating layer of the body 2 intersects to supply a arranged in close thermal contact with the storage chamber 4 evaporator 18.
• the throttle pipe 17 is guided directly on the surface of a suction pipe 19, which leads from the evaporator 18 to the compressor 9, or within this suction pipe 19.
• the volume of the entire refrigerant loop changes little, compared to a conventional one, despite a length of the choke tube 12 of typically 1 to 2 meters Refrigerant circuit of a refrigerator of the same size, and accordingly, the amount of circulating refrigerant needed for efficient operation changes little.
• the throttle tube 12 extends on the central plate 13 at a distance from the web 15 connected to the inner container 5, the heat flow from the throttle tube 12 to the storage chamber 4 via the connection between the sheet metal blank 6 and the inner container 5 is negligible. Due to the spatial distance from the condenser 10, the throttle tube 12 is shielded from heat emitted by the condenser 10. Therefore, with the throttle tube 12 a greater cooling of the refrigerant can be achieved than by an enlargement of the condenser 10 to the
• the device 1 is positioned so that the side wall containing the throttle tube 12 is exposed, so that emitted from the throttle tube 12 heat quickly to the Environment can be given further.
• the invention is, albeit slight
• the sheet metal blank 6 acts as a heat accumulator that receives heat from the throttle tube 12 as long as the compressor 9 is in operation and drives the circulation of refrigerant. In a subsequent standstill phase of the compressor, the heat of the sheet metal blank 6 can be distributed to the environment even in such a refrigeration device.

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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)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (8)

Families Citing this family (6)

Family Cites Families (20)

• 2011
  • 2011-03-28 DE DE102011006260A patent/DE102011006260A1/de not_active Withdrawn
• 2012
  • 2012-03-09 EP EP12707768.3A patent/EP2691713B1/de active Active
  • 2012-03-09 RU RU2013143743/13A patent/RU2553251C2/ru active
  • 2012-03-09 PL PL12707768T patent/PL2691713T3/pl unknown
  • 2012-03-09 ES ES12707768.3T patent/ES2544837T3/es active Active
  • 2012-03-09 WO PCT/EP2012/054059 patent/WO2012130584A2/de active Application Filing
  • 2012-03-09 CN CN201280015694.5A patent/CN103477169B/zh not_active Expired - Fee Related
  • 2012-03-09 US US14/003,577 patent/US20140053593A1/en not_active Abandoned

Non-Patent Citations (1)

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