Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
  • F04B39/02—Lubrication
  • F04B39/0223—Lubrication characterised by the compressor type
  • F04B39/023—Hermetic compressors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
  • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections

Definitions

• This invention is related to a compressor, which is preferably used in refrigerators, and efficiency of which is increased by preventing the oil that provides the lubrication and cooling of the beatings in side it to reach the area where the suction muffler is located.
• Hermetic compressors with pistons and plastic suction mufflers that are preferably used in refrigerators use oil for lubricating the bearings in the compressor during their operation and this oil proceeds to the plastic suction muffler area and then to the cylinder hole due to insufficient sealing. As oil reaches the cylinder hole, it reduces the performance of the system when pumped to the system. Besides this, when the quantity of the oil in the hermetic compressor is reduced, lubrication efficiency of the oil is reduced as well and thus compressor life is also decreased.
• Lubrication of the bearing in the hermetic compressors with pistons is provided by the rotation of the crankshaft at high speeds.
• the lubrication is done by the oil transmitted through the oil suction tube placed at the lower part of the crankshaft.
• the main purpose of the presence of oil in the compressor is to lubricate the bearings and to discharge the heat of the compressor through the upper housing.
• the most common known method to solve this problem is keeping the centrifuged oil level below the body cylinder hole level. Thus, the centrifuged oil contacts the cylinder hole and cannot not reach the cylinder head area.
• oil is prevented to enter the nozzle area by placing barriers on the muffler.
• barriers fail to prevent oil flow due to high viscosity of oil at high temperatures. Therefore, some oil is pumped to the system along with the cooling gas.
• the object of this invention is to develop a compressor with high efficiency that presents the mixing of the cooling and lubricating oil with the cycling fluid pumped to the system.
• Figure 1 - is the a perspective view of a deflector
• Figure 2 - is the a bottom view of the upper housing
• Figure 3 A side section view of a compressor which has a centrifuge pipe on its suction muffler side
• Figure 4 A side section view of a compressor which has a centrifuge pipe on the opposite side of the muffler
• the circulation of the cycling fluid for providing the cooling, in domestic appliances, preferably in refrigerators, is provided by a hermetic compressor (1).
• the cooling gas is used as cycling fluid, in the preferred embodiment.
• the compressor (1) comprises of a lower housing (2) to hold the parts in it, an upper housing (9), placed on the lower housing (2), a cylinder (3) placed in the upper (9) and lower housing (2) to provide pumping the cooling gas in it, a piston (4) placed above the cylinder (3) to provide the cooling gas to be compressed into the cylinder orifice, a crankshaft (5), to transmit the motor motion, a connecting rod (6), to transmit the motion from the crankshaft to the piston (4), a piston pin (7) that com ects the connecting rod (6) to the piston (4), a counterweight (11) which cancels the offsets of the center of gravity, in reference to the axis of rotation of the crankshaft (5) and parts like crankshaft, connecting rod (6) and piston (4), a suction muffler (10) preferably made of plastic material to convey the cooling gas to the cylinder area without getting hot and to prevent the noise caused by the cooling gas and a cylinder head (8), which connects the suction muffler (10) and the
• a fluid is used in the compressor to facilitate the movement of the compressor parts and to transfer the heat emerging inside the compressor (1) to outside.
• oil is used as fluid.
• the compressor (1) comprises a suction tube (12) to provide the oil in the lower housing (2) to be sucked and transmitted to the crankshaft (5), a centrifuge pipe (13) fixed at an angle to the rotation axis of the crankshaft (5) that centrifuges oil coming from the crankshaft (5), by rotating together with the crankshaft (5) lubricating the bearings to the upper housing (13) and a deflector (14) which directs the oil centrifuged from the pipe (13) over to the connecting rod (6), piston (4) .and piston pin (7) by preventing the oil to reach the cylinder area.
• the oil deflector (14) comprises a suction nozzle (15) onto which the oil centrifuged by the centrifuge pipe (13) contacts first and which prevents the oil to reach the suction muffler (10) and provides the oil to be transferred onto the movable parts, a tail (16), to prevent the oil to reach from the suction muffler (10), and a cavity (17) to provide the accelerated oil to drop onto the upper housing (2) or directly onto the compressor (1) parts by sliding over the upper housing (9).
• the oil sucked by the suction pipe (12) is centrifuged into the compressor (1) over the crank eccentric, by passing through the crankshaft (5).
• the heat of the oil, heated in the bearings and in the motor is transferred to the upper housing (9).
• the deflector (14) provides the oil, having high viscosity and velocity to reach the area of the cylinder head (8) and the suction muffler (10) without preventing the oil to impact the upper housing (9) in the compressor (1) and to prevent the mixing of the oil to the cooling gas in cylinder (3).
• the deflector (14) is fixed onto the upper housing (9), preferably by point welding.
• the deflector (14) is located at a point, where it may prevent the centrifuged oil to enter into the side of the suction muffler (10) and where it may provide the centrifuged oil to come over the piston pin (7), when the piston (4) is in its lower dead point and where it will be in an area in between the centrifuge pipe (13) .and the cylinder head (8).
• centrifuged oil is transmitted onto the piston pin (7) and the piston bearings and the better lubrication of these areas are hence provided, while the passing of the centrifuged oil which is centrifuged horizontally over the centrifuge pipe (13) to the suction muffler (10) area is prevented.
• the length of the centrifuge tube (13) is sufficient enough so as not to touch the upper housing (9) while rotating together with the crankshaft (5) in order to provide the transfer of the heat of the oil centrifuged from the centrifuge tube (13) to the upper housing (9).
• the deflector (14) is fixed to the upper housing (9) instead of placing over the parts in the compressor.
• the deflector (14) located to be sufficiently distant from the moving parts in the compressor (1) has a from to eliminate collision to the moving parts. Because there is the danger of colliding of the moving parts to the deflector (14) due to the deflections that happen during the starting and the stopping of the compressor (1).
• the deflector (14) has one or more recesses (18) at its side, which is closer to the movable parts in such a manner and quantity that it will be prevented from hitting the movable parts and the deflector (14) has one or more protrusions that will not hit the movable parts and that will provide the oil to get closer as much as possible to the parts.
• a deflector (14), in the form of a hook is used.
• the entrance nozzle (15) of the deflector (14), which is preferably in linear form, is located just before the cylinder (3), in accordance with the direction of rotation of the centrifuge pipe (13), and this prevents the oil to reach the suction muffler
• the oil directed by the entrance nozzle (15) of the deflector (14) goes away the suction muffler (10) by the help of the jet flow of the tail (16) part of the deflector (14), in the form of a chord, and is then directed towards the desired directions.
• the cavity outside the entrance nozzle (15) and the tail (16) part of the deflector (14) is for preventing the accumulation of oil within the deflector (14) which remains in between the sidewalls of the deflector (14)
• the deflector (14) is located in such a way to be in the center of the geometrical axis (El) of the upper housing (9) and in order not to hit the projection of the circular centrifuge rotation forming a circle which assumes the axis of rotation (E2) of the crankshaft (5).
• cooling of the movable parts which are heated as they move are provided by contacting them with oil while the heat of the oil is transferred to the upper housing (9) and the travel of the oil to the suction muffler (10) area is prevented.
• the heat transfer from the oil to the cooling gas inside the suction muffler (10) is eliminated by preventing the hot oil to reach the suction muffler (10).
• the inlet temperature of the cooling gas entering the cylinder hole is lowered and the columetric efficiency of the compressor (1) is increased.
• the deflector (14) does not prevent taking out the parts in the compressor (1) during transportation.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Compressor (AREA)
• Superconductors And Manufacturing Methods Therefor (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

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• 2003
  • 2003-03-21 DK DK03715914T patent/DK1488105T3/da active
  • 2003-03-21 AT AT03715914T patent/ATE423904T1/de not_active IP Right Cessation
  • 2003-03-21 TR TR2004/02387T patent/TR200402387T1/xx unknown
  • 2003-03-21 WO PCT/TR2003/000022 patent/WO2003081044A1/en not_active Application Discontinuation
  • 2003-03-21 AU AU2003219647A patent/AU2003219647A1/en not_active Abandoned
  • 2003-03-21 EP EP03715914A patent/EP1488105B1/de not_active Expired - Lifetime
  • 2003-03-21 ES ES03715914T patent/ES2321499T3/es not_active Expired - Lifetime
  • 2003-03-21 DE DE60326325T patent/DE60326325D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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