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
  • F25B31/00—Compressor arrangements
  • F25B31/002—Lubrication
• • 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
  • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
  • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
  • F04B27/14—Control
  • F04B27/16—Control of pumps with stationary cylinders
  • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
  • F04B27/1804—Controlled by crankcase pressure
• • 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
  • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
  • F04B53/18—Lubricating
• • 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
  • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
  • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
  • F04B27/14—Control
  • F04B27/16—Control of pumps with stationary cylinders
  • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
  • F04B27/1804—Controlled by crankcase pressure
  • F04B2027/1822—Valve-controlled fluid connection
  • F04B2027/1827—Valve-controlled fluid connection between crankcase and discharge chamber

Definitions

• the invention relates to a compressor according to the preamble of patent claim 1.
• Compressors for compressing refrigerant are now widely used. This is the case, for example, in the field of (room) air conditioning as well as in the field of cooling a wide variety of goods.
• field of (room) air conditioning among other things, the air conditioning of residential and office buildings and the air conditioning of motor vehicles (for example, the air conditioning of passenger compartments of
• Engine room is arranged, which (partially or in total) by a
• Engine housing is limited, can be found in the field of air conditioning of
• the compressors for passenger cars are usually compressors of the swashplate design.
• the engine on a swash plate or a swivel ring which (r) pivotally connected to a with a Motor is arranged in operative engagement drive shaft.
• the stroke volume of the piston and thus the delivery volume of the compressor can be influenced.
• the delivery volume or the piston stroke of the compressor can be adjusted by the pressure prevailing in the engine room.
• these compressors have a low-pressure fluid connection, which the engine room with a suction gas volume in the form of a suction chamber in
• Fluid communication brings, as well as a high-pressure fluid connection, which the
• Engine room with a high-pressure volume (pressure chamber) in fluid communication brings on.
• the engine room can be supplied with high-pressure refrigerant via the high-pressure fluid connection, thereby increasing the engine room pressure.
• the pressure in the engine room can be reduced via the low-pressure fluid connection.
• Refrigeration system in which the compressor is arranged (in particular over in
• Refrigerant circuit arranged cooling or heat exchanger in the form of a condenser and an evaporator, as well as via a circulating expansion element) back into the suction gas volume or the suction chamber.
• Refrigerant compressors of this type have an oil charge of about 100 g of oil per 1 liter of refrigerant.
• Compressor with constant piston stroke oil enters the refrigerant circuit and from there back into the suction chamber of the compressor, although in these compressors usually no fluid connection between the suction chamber and engine room exists.
• Compressors for the air conditioning of passenger compartments of passenger cars are a mass product, which is replaced in the event of a defect. A repair is not planned. Likewise, no maintenance of the same is provided during the life of such a compressor. However, this is not the case in the range of compressors with greater cooling capacity. While compressors in passenger cars have relatively low operating lives, larger compressors, for example, in buses or for the refrigeration of goods in trucks and warehouses are almost continuously in operation. Due to the high operating times, regular maintenance of the compressors is essential. The regular maintenance also involves an oil change. If there is oil in the entire refrigerant circuit, part of the used oil remains in the compressor or in the refrigeration system during the oil change. This would shorten the maintenance intervals.
• the invention is not limited to a compressor of the swash plate type.
• the invention may be used in all conceivable reciprocating compressors such as e.g. Reciprocating compressors in series, V or W design, axial piston compressors and radial piston compressors with contant piston stroke and in all conceivable rotary piston compressors such. Screw, rotary piston, scroll / scroll compressors are ralformat.
• Fig. 2 shows a second embodiment of a compressor according to the invention in turn in a schematic representation.
• Fig. 1 In the first embodiment shown in Fig. 1 is a
• Compressor 10 of the swash plate design This has an engine housing 12, which limits an engine room 14 (crank chamber). In the engine room 14, a swash plate 16 is arranged. In alternative embodiments, the
• Pivot plate 16 is rotationally driven by a drive shaft 18 and is about sliding blocks (not shown in Fig. 1) with piston 22 in operative engagement.
• the compressor 10 has five pistons 22.
• the swash plate 16 which is rotatably connected to the drive shaft 18 is connected to the drive shaft 18 by means of a (not shown tilting or
• Swivel mechanism ' articulated so that it is adjustable in its inclination (inclination angle 24) of the drive shaft.
• inclination angle 24 By changing the inclination angle 24 between the drive shaft 18 and the
• the delivery volume of the compressor can be controlled or controlled.
• Inclination angle is, the larger the delivery volume, since the stroke of the piston 22, which are arranged in respective piston associated cylinder bores 26, the smaller, the inclination angle 24 is.
• the drive shaft 18 is arranged via a in the engine housing 12
• Sealing element 28 which is designed as a ring seal and the engine compartment 14 fluid-tight seals against the environment, introduced into the engine compartment 14.
• the drive shaft 18 is mounted in two places in the compressor 10, namely by means of a first bearing 30, which is arranged in the engine housing 12 and by means of a second bearing 32, which is arranged in a cylinder block 34, in which also the cylinder bores 26 are arranged. Also limited by the engine housing 12, the compressor 10, an oil reservoir 36, which is in fluid communication with the engine room 14 via an opening 38. Both in the oil reservoir 36 and in parts of the engine room 14 is an oil sump 40, which serves for the lubrication of the compressor 10.
• the described first embodiment of a compressor 10 according to the invention also has a cylinder head 42, which is delimited by a cylinder head housing 44.
• a suction gas volume 46 is arranged in the form of a suction chamber or a suction chamber.
• a high-pressure volume 48 in the form of a chamber-shaped pressure chamber is arranged in the cylinder head 42.
• refrigerant to be compressed flows out of the suction gas volume 46 via an opening (suction valve, suction plate) (not shown) into the cylinder bores 26, which after the compression process, as indicated by a second arrow 52, enters the high-pressure volume 48 is ejected.
• a first fluid connection 54 is arranged (which in the embodiment described here with the low-pressure fluid connection of the
• the first fluid connection 54 Arranged in the first fluid connection 54 is an oil separator 56, which in the described first embodiment is designed as a centrifugal oil separator and has an oil separator inlet 66 and an oil separator outlet 72.
• the first fluid connection 54 has a
• a first end 62 of the ⁇ labscheiderzu passrabites 58 of the first fluid connection 54 is in fluid communication with the engine room 14, while a second end 64 of the ⁇ labscheiderzuiverabitess 58 of the first fluid connection 54 with the
• the Olabscheiderabmelrabites 60 of the first fluid connection 54 in turn has a first end 68 and a second end 70, wherein the first end 68 of the ⁇ labscheiderabcrystallineabes 60 with the
• Oil separator output 72 is in fluid communication.
• Suction gas volume 46 in fluid communication.
• the oil separator supply section 58 of the first fluid connection 54 need not necessarily be in fluid communication with the engine compartment 14 as the oil carrying volume.
• the first end 62 of the oil separator feed section 58 it is also conceivable for the first end 62 of the oil separator feed section 58 to be arranged in the compressor 10 with a low-pressure volume or a low-pressure side of a refrigeration system (known in principle to the person skilled in the art and described below in the description of the second embodiment) is, as oil-carrying volume, in fluid communication. Ie in alternative
• Low-pressure fluid communication of the compressor 10 coincides, but represents a separate from this, its own fluid connection, which brings the low-pressure side of the refrigeration system (via the ⁇ lfiter 56) in fluid communication with the Sauggasvolumen 46.
• Fluid connection 74 has a drive media portion 76 which is in fluid communication with high pressure volume 48 at its first end 78. At its second end 80, the drive media section 76 is provided with a drive media inlet 82 of an injector 84 disposed in the second fluid connection 74 and one in the second
• Exit section 86 stands with a arranged on the injector 84
• Injector outlet 92 in fluid communication while the second end 90 of the
• Exhaust section 86 is in fluid communication with the engine compartment 14.
• the amount of refrigerant flowing from the high-pressure volume 48 into the engine compartment 14 is determined or limited by an injector nozzle 93 arranged in the injector 84. This is necessary because it is necessary for power regulation of the compressor 10, the pressure in
• the pressure to be set in the engine compartment 14 is via a point reducible cross section in the form of a pulse valve 100, which is arranged in the ⁇ labscheiderab ⁇ rab 60 of the first fluid connection 54 and with an electronic
• Suction gas volume 46 prevailing pressure flows (with open pulse valve 100) refrigerant, which entrains an upset due to the flow conditions and due to the rotational movement of the swash plate 16 oil mist over the ⁇ labscheiderzutrabites 58 of the first fluid connection 54 and the
• Oil separator inlet 66 into the Zentrifugalölabscheider 56. As it flows into the Zentrifugalölabscheider 56, the gas is set in rotation, which are thrown due to the centrifugal forces in the oil mist oil droplets to an oil separator housing 94, which collect in a lower portion of Zentrifugalölabscheiders in a Olabscheidereservoirs 96.
• the centrifugal oil separator 56 has a T or mushroom-shaped baffle plate or a T-shaped or mushroom-shaped baffle plate 98 which is deflected from the offset in rotation and now freed from oil mist refrigerant in the direction of the ⁇ labscheidenciesgangs 72 and this leaves again.
• Refrigerant is mixed is, sucks, accelerated and expelled through the injector 92 again.
• the latter is in fluid communication via a third fluid connection 104 with an oil outlet 106 of the centrifugal oil separator 56.
• the entrained oil is doing at the second end 90 of the
• Outlet portion 78 of the second fluid connection 74 is introduced via a there arranged engine room inlet 108 in the engine compartment 14, wherein the
• Oil separator (Zentrifugalölabscheider 56) but is supplied via an oil pump with an oil-refrigerant mixture, wherein the entrained oil, which serves the lubrication, is cooled when flowing through the expansion device in the form of the injector (especially by the expansion of the entrained refrigerant).
• the basic idea to implement an Olkühlvortechnisch in a compressor is not limited to the use of an injector or any other expansion device. Also, an oil cooling by an air, - water, or refrigerant cooled or a
• the compressor 200 according to the second embodiment also has a suction gas volume 46, a high-pressure volume 48, and an engine room 14.
• a second and third fluid connection 74, 104, and an injector 84 are analogous to the first
• Embodiment arranged. That the second fluid connection 74 is in turn arranged between the high-pressure volume 48 and the engine compartment 14 and permits fluid communication between the high-pressure volume 48 and the engine compartment 14 or the locations to be lubricated in it (bearings, seals, etc.).
• an injector 84 or a jet pump is arranged analogously to the first embodiment.
• the third fluid connection 104 fluidly communicates the oil separator 56 with the injector 84.
• the compressor 200 of the second embodiment an in Compared to the first embodiment, modified first fluid connection 254.
• this also has a ⁇ labscheiderzutrabrough 258 and a
• Oil separator Abwardrabites 60 wherein the ⁇ labscheiderabingrabites 60 in its arrangement and functionality of the ⁇ labscheiderabingrabites 60 of the first
• Fluid communication can be brought. This will ensure that oil that is in the
• the delivery volume of the second embodiment of a compressor according to the invention is controlled by switching on and off of the compressor 200. This makes it possible to dispense with the pulse valve 100, since by a suitable choice of the flow rates of the first, second and third fluid connection 54, 74, 104 ideal (preferably approximately constant) conditions, in particular an ideal oil supply to be lubricated Jobs can be guaranteed.
• the flow rates which are defined as the amount of refrigerant / refrigerant oil mixture / oil per time flowing through the respective fluid connection 54, 74, 104, can be determined, for example, by a suitable geometry of the
• Injectors 84 are ensured.
• the arrangement of locations of reduced or reducible cross-section (such as diaphragms, valves) is conceivable.
• the second Fiuid ist 74 stands with a
• Engine room inlet 206 in fluid communication, which is in a tubular
• Lubricant supply channel 208 opens.
• the lubricant supply channel 208 is in turn in Fiuidtell with the first bearing 30 and with the first sealing member 28, so as to ensure a lubrication of the first bearing 30 and an optimal function of the sealing element 28.
• a compressor according to the invention may have a plurality of engine room inlets 208, which are in fluid communication with the second fluid connection, whereby a plurality of points to be lubricated are supplied with lubricant. This consideration also applies to the first
• Engine room inlet 208 (in the first embodiment 108) is in fluid communication with, for example, the (then correspondingly formed or branched) lubricant supply channel 208 having a plurality of locations to be lubricated.
• the supply of the points to be lubricated of the compressor 200 is analogous to the first embodiment.
• Oil separator housing 94 and / or the baffle plate 98 and / or other components of the oil filter 56 or the entire oil filter 56 are integrally formed with the compressor housing and thus manufactured in one operation with the housing manufacturing, e.g. can be poured.
• the idea of the invention includes not only a compressor 10, 200, which is designed according to the invention, but also a corresponding one Specify refrigeration system with a refrigerant circuit, which has a high pressure side (high pressure volume) and a low pressure side (low pressure volume) 205, and a compressor 10, 200 according to the invention, as defined above by the figure description and by the appended claims.
• Other components of the refrigerator (condenser, expansion element and evaporator) are familiar to the expert and also described in more detail above.
• centrifugal oil separator it does not have to be a centrifugal oil separator, but any other oil separator, e.g. an oil separator with sieve bodies or filter elements is conceivable.
• the entrained oil is separated by a Zentrifugalölabscheider from the gas stream and passed through the rotation and gravity to the bottom of the separator.
• Fluid connection 54 is formed used. The pressure difference between
• Engine room 14 and the high pressure volume 40 makes it possible to operate the injector or the jet pump 84, which sucks the collected oil from the oil separator 56 and via corresponding fluid connection (outlet section 86 of the second
• Engine room 14 and the engine housing 12 avoided or at least reduced.
• Such a construction ensures that the highly loaded components of the compressor are constantly supplied with lubricant.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Compressor (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43972140

Family Applications (1)

Country Status (8)

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Citations (1)

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• 2009
  • 2009-12-02 DE DE200910056518 patent/DE102009056518A1/de not_active Withdrawn
• 2010
  • 2010-11-23 BR BR112012012840A patent/BR112012012840A2/pt not_active IP Right Cessation
  • 2010-11-23 AU AU2010327140A patent/AU2010327140B2/en not_active Ceased
  • 2010-11-23 CN CN201080054863.7A patent/CN102639872B/zh not_active Expired - Fee Related
  • 2010-11-23 US US13/513,292 patent/US9021830B2/en not_active Expired - Fee Related
  • 2010-11-23 EP EP10781444A patent/EP2507566A2/de not_active Withdrawn
  • 2010-11-23 JP JP2012540308A patent/JP5503749B2/ja not_active Expired - Fee Related
  • 2010-11-23 WO PCT/EP2010/007097 patent/WO2011066914A2/de active Application Filing

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