WO2015140949A1 - Hermetic compressor and vapor compression refrigeration cycle device with said hermetic compressor - Google Patents
Hermetic compressor and vapor compression refrigeration cycle device with said hermetic compressor Download PDFInfo
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- WO2015140949A1 WO2015140949A1 PCT/JP2014/057464 JP2014057464W WO2015140949A1 WO 2015140949 A1 WO2015140949 A1 WO 2015140949A1 JP 2014057464 W JP2014057464 W JP 2014057464W WO 2015140949 A1 WO2015140949 A1 WO 2015140949A1
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- space
- refrigerant
- hermetic compressor
- stator
- Prior art date
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- 230000006835 compression Effects 0.000 title claims abstract description 53
- 238000007906 compression Methods 0.000 title claims abstract description 53
- 238000005057 refrigeration Methods 0.000 title claims description 16
- 239000003507 refrigerant Substances 0.000 claims abstract description 87
- 239000010687 lubricating oil Substances 0.000 claims abstract description 22
- 230000001965 increasing effect Effects 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims description 62
- 238000005192 partition Methods 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 45
- 230000000694 effects Effects 0.000 description 21
- 230000007423 decrease Effects 0.000 description 20
- 238000000926 separation method Methods 0.000 description 19
- 238000005461 lubrication Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
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- 230000000903 blocking effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
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- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000010030 laminating Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010726 refrigerant oil Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000576 Laminated steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- 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
- F04B39/0238—Hermetic compressors with oil distribution channels
- F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
-
- 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
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/005—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of dissimilar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/028—Means for improving or restricting lubricant flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
-
- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
-
- 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
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/60—Shafts
Definitions
- the present invention relates to a hermetic compressor and a vapor compression refrigeration cycle apparatus including the hermetic compressor, and more particularly, to a hermetic compressor having a high oil separation effect and a vapor compression refrigeration cycle including the hermetic compressor. It relates to the device.
- a refrigerant compressor used in a vapor compression refrigeration cycle apparatus uses a refrigerant compressor in which the rotational force of the electric motor is transmitted to the compression mechanism by the drive shaft and the refrigerant gas is compressed. It has been.
- the refrigerant gas compressed by the compression mechanism is discharged into the hermetic container, and after moving from the lower space to the upper space with respect to the motor through the motor part gas flow path, the hermetic seal It is discharged to the refrigerant circuit outside the container.
- the lubricating oil supplied to the compression mechanism is mixed with the refrigerant gas and discharged outside the sealed container.
- the high-pressure shell type scroll compressor described in Patent Document 1 compresses the refrigerant sucked by a compression mechanism disposed on the upper side in the sealed container, and once lowers the oil to the oil reservoir at the bottom of the sealed container, The motor is raised from the lower space of the motor to the upper space through the path, and high pressure gas is discharged from the compressor discharge pipe.
- the high-pressure shell-type scroll compressor described in Patent Document 1 includes a fan provided on an upper portion of an electric motor rotor and a partition wall that partitions the electric motor stator side and the electric motor rotor side above the fan.
- the refrigerant and the lubricating oil are separated by the centrifugal force generated by the rotation of the fan and the pressure resistance flowing through the gap between the partition walls, and the lubricating oil that is not separated from the refrigerant flows directly into the discharge pipe, that is, the lubricating oil. Is prevented from flowing out of the sealed container.
- Patent Document 2 discloses that an electric element housed in an upper portion of a sealed container, a compression element driven by the electric element, and an oil disposed opposite to the upper end ring of the rotor of the electric element at a predetermined interval.
- a hermetic electric compressor having a separation plate and a stirring blade planted on the oil separation plate
- the hermetic motor is characterized in that the stirring blade is planted only on the lower surface of the oil separation plate.
- Patent Document 3 discloses that an oil return from the vicinity of the tip portion toward the lower end is made using the head pressure increase that occurs near the tip in the rotational direction of the upper balance weight at the upper end of the motor rotor provided in the sealed container.
- a refrigerant compressor that forms a working flow path and returns high-concentration lubricating oil that appears around the rotor to the lower side of the motor to prevent oil from rising.
- Non-Patent Document 1 In order to configure a high-performance centrifugal blower, as described in Non-Patent Document 1, the shape of the impeller itself, the shape of the flow path flowing into the impeller, the shape of the flow path flowing out of the impeller Theoretical design is necessary.
- Patent Document 1 and Patent Document 2 do not disclose a theoretical design method for the fan and blades attached to the upper part of the electric motor rotor (rotor) disclosed in each of them, in order to improve the oil separation state.
- the optimal fan and blade configuration has not been achieved.
- the present invention has been made to solve the above-described problems, and uses the rotation of an electric motor rotor provided in a hermetic container to reduce the amount of oil outflow from the hermetic container. It is an object of the present invention to provide a hermetic compressor that can be used, and a vapor compression refrigeration cycle apparatus including the hermetic compressor.
- a hermetic compressor includes a hermetic container that stores lubricating oil at the bottom, and a motor that is provided inside the hermetic container and has a stator and a rotor having a rotor air hole penetrating in a vertical direction.
- a cylindrical side wall that partitions the upper space of the electric motor into an outer space on the stator side and an inner space on the rotor side so as to surround the rotary pressure boosting mechanism, and a rotary pressure boosting mechanism that passes and boosts the refrigerant gas while rotating.
- a discharge pipe that communicates with the inner space and allows the refrigerant to flow out of the space to an external circuit of the sealed container, and the refrigerant gas compressed by the compression mechanism and discharged into the sealed container is Electric motor After moving from the side space through the rotor air hole to the upper end of the rotor and flowing into the rotary pressure increasing mechanism, the pressure is increased and then flows into the inner space to boost the inner space, and from the outer space to the inner space The refrigerant gas is discharged from the discharge pipe while suppressing the inflow of the refrigerant gas into the space.
- the vapor compression refrigeration cycle apparatus includes a hermetic compressor according to the present invention, a radiator that dissipates heat from the refrigerant compressed by the compressor, and an expansion that expands the refrigerant that has flowed out of the radiator.
- the present invention it is possible to prevent a decrease in the amount of lubricating oil stored in the sealed container, and to obtain an effect of suppressing a decrease in reliability due to poor lubrication and an effect of improving energy saving performance.
- FIG. 2 is a cross-sectional view (cross-sectional view taken along the line AA in FIG. 1) showing the structure of the hermetic compressor according to the first embodiment of the present invention. It is a perspective view which shows the rotation pressure
- FIG. 5 is a transverse sectional view (AA sectional view of FIG. 4) showing a structure of a hermetic compressor according to a second embodiment of the present invention.
- FIG. 8 is a transverse sectional view (AA sectional view of FIG. 7) showing a structure of a hermetic compressor according to a third embodiment of the present invention. It is a longitudinal cross-sectional view which shows the structure of the hermetic compressor by Embodiment 4 of this invention.
- FIG. 10 is a transverse sectional view (AA sectional view of FIG. 9) showing a structure of a hermetic compressor according to a fourth embodiment of the present invention.
- FIG. 1 It is a perspective view which shows the rotary pressure
- FIG. 1 It is a perspective view which shows the rotary pressure
- FIG. 1 is a longitudinal sectional view showing the structure of a hermetic compressor according to Embodiment 1 of the present invention.
- FIG. 2 is a transverse sectional view (AA sectional view of FIG. 1) showing the structure of the hermetic compressor according to the first embodiment of the present invention.
- FIG. 3 is a perspective view showing a rotary pressure raising mechanism provided above the rotor of the hermetic compressor according to the first embodiment of the present invention.
- the black arrow shown in FIG. 2 shows the rotation direction of a rotation pressure
- FIG. 3 shows a rotary pressure increasing mechanism observed from the direction of the three-dimensional arrow shown in FIG.
- a hermetic compressor 100 according to the first embodiment is a high-pressure shell hermetic scroll compressor, and includes a hermetic container 1 in which a lower oil sump 2 that stores lubricating oil is formed at the bottom, and an inner part of the hermetic container 1.
- the motor 8 accommodated, the drive shaft 3, the compression mechanism 60, the rotation pressure raising mechanism 49, etc. are provided.
- the electric motor 8 includes a substantially cylindrical stator 7 in which a through-hole penetrating in the vertical direction is formed in an inner peripheral portion, and a substantially cylindrical disposed on the inner peripheral side of the stator 7 via a predetermined air gap 27a. And a rotor 6 having a shape.
- the electric motor 8 according to the first embodiment is, for example, a DC brushless motor.
- the stator 7 is configured by laminating steel plates, and a coil winding block is formed by winding a coil around the core 7c with high density.
- a plurality of upper motor coil transition portions 7 a that are coil portions protruding from the coil winding block to the upper side of the stator 7 are formed at the upper end of the stator 7.
- a plurality of motor lower coil crossing portions 7b which are coil portions protruding downward from the wire block to the stator 7, are formed.
- the stator 7 is attached to the inner peripheral surface of the sealed container 1 by press-fitting or welding. Note that a part of the outer peripheral portion of the core 7 c of the stator 7 is notched, and when the stator 7 is attached to the inner peripheral surface of the sealed container 1, the stator 7 is interposed between the core 7 c and the sealed container 1.
- An outer peripheral flow path 25 is formed.
- the rotor 6 is formed by laminating steel plates, and the upper and lower ends of these laminated steel plates are sandwiched between a rotor upper end fixed substrate 33 and a rotor lower end fixed substrate 34.
- the rotor 6 has a magnet disposed therein.
- an upper counterweight 31 and a lower counterweight 32 disposed in opposite phases on the upper surface of the rotor upper end fixed substrate 33 and the lower surface of the rotor lower end fixed substrate 34, respectively, along the outer peripheral edge of the rotor 6.
- a predetermined thickness is provided.
- the rotor 6 according to the first embodiment is formed with four rotor air holes 26 penetrating in the vertical direction. The number of the rotor air holes 26 may be at least one.
- the drive shaft 3 has a lower end attached to the rotor 6 of the electric motor 8 and an upper end attached to a compression mechanism 60 described later. That is, the drive shaft 3 transmits the driving force of the electric motor 8 to the compression mechanism 60.
- the drive shaft 3 is rotatably held by the main bearing portion 55 of the upper bearing member 11 provided on the upper side of the electric motor 8 and the lower side of the drive shaft 3 of the lower bearing member 12 provided on the lower side of the electric motor 8.
- the auxiliary bearing 54 is rotatably held.
- the compression mechanism 60 is provided above the electric motor 8 and includes a fixed scroll 51 and an orbiting scroll 52.
- the fixed scroll 51 has a plate-like spiral tooth formed on the lower surface, and is attached to a compression mechanism housing 50 fixed to the inner peripheral surface of the sealed container 1.
- the orbiting scroll 52 is formed with plate-like spiral teeth meshing with the plate-like spiral teeth of the fixed scroll 51 on the upper surface, and is slidably provided on the upper end portion of the drive shaft 3.
- the compression chamber 4 is formed between the two plate-like spiral teeth.
- the bottom surface of the swing scroll 52 is slidably supported by the upper surface portion of the upper bearing member 11.
- the upper bearing member 11 has an outer peripheral surface that is slidably supported by the inner peripheral surface of the compression mechanism housing 50, and retracts downward when a pressure of a predetermined value or more is applied to the compression chamber 4. 4 is configured to avoid an abnormal pressure increase.
- an electric motor upper space 9 (more specifically, a portion above a cylindrical side wall 37 to be described later) includes an electric motor stator upper space 9a (outer space) and an electric motor rotor upper space 9b (inner space). ) Is provided.
- the rotary pressure raising mechanism 49 is provided above the rotor 6.
- the rotary pressure boosting mechanism 49 according to the first embodiment is a centrifugal impeller 40 and includes a plurality of blades 41 provided from the inner peripheral side toward the outer peripheral side with the drive shaft 3 as the center. Further, the centrifugal impeller 40 according to the first embodiment includes a blade upper disk 43 (upper surface plate) that blocks refrigerant gas from flowing into the centrifugal impeller 40 from above the blades 41, and a lower side of the blades 41. A blade lower disk 44 (lower surface plate) that blocks the refrigerant gas from flowing into the centrifugal impeller 40.
- the centrifugal impeller 40 includes, for example, a connection between the blade upper disk 43 and the drive shaft 3, a connection between the blade lower disk 44 and a cylindrical side wall 37 described later, or a connection between the inner circumferential flow guide 42 and the rotor 6.
- the refrigerant rotates around the drive shaft 3 due to the pressure of the refrigerant flowing in from the inlet on the inner peripheral side and flows out from the outlet on the outer peripheral side.
- the hermetic compressor 100 surrounds the centrifugal impeller 40 (more specifically, the refrigerant outlet on the outer peripheral side), that is, the motor upper space 9 is changed to the motor stator upper space 9a (
- a cylindrical side wall 37 is provided so as to partition the outer space) and the motor rotor upper space 9b (inner space).
- an oil drain hole 39 is formed in the cylindrical side wall 37 on the rotation direction front end portion 31 a side of the upper counterweight 31.
- the cylindrical side wall 37 is attached to the upper surface portion of the disc portion 38 a of the balancer fixing bottom plate 38 for fixing the upper counterweight 31 to the rotor upper end fixing substrate 33.
- a stator inner peripheral flow path blocking portion 38b protrudes from the outer peripheral portion of the disc portion 38a of the balancer fixed bottom plate 38.
- the stator inner peripheral flow path blocking portion 38b is formed by a stator inner peripheral flow path 27 formed between the rotor 6 and the stator 7 (specifically, an air gap 27a between the rotor 6 and the stator 7 or a fixed It arrange
- the swinging scroll 52 of the compression mechanism 60 moves eccentrically with the rotation of the drive shaft 3, whereby low-pressure intake refrigerant is discharged from the compressor intake pipe 21. Enters compression chamber 4. Then, the suction refrigerant becomes high pressure by the compression stroke in which the volume of the compression chamber 4 gradually decreases, and is discharged from the discharge port 18 of the fixed scroll 51 to the discharge space 10 ((1) in FIG. 1) in the sealed container 1. .
- the lubricating oil stored in the lower oil sump 2 is sucked up from the lower end of the drive shaft 3 and flows into the hollow hole 3a.
- a part of this lubricating oil is supplied to the sub-bearing portion 54, the main bearing portion 55 and the like through an oil supply hole (not shown).
- the lubricating oil flows out from the upper end of the drive shaft 3, it is supplied into the compression chamber 4 through a gap between the upper bearing member 11 and the swing scroll 52 or the oil supply hole 3b. This contributes to lubrication of the compression mechanism 60 and sealing of compressed gas.
- the lubricating oil supplied into the compression chamber 4 is discharged together with the refrigerant compressed to a high pressure in the compression chamber 4 from the discharge port 18 of the fixed scroll 51 in the discharge space 10 in the sealed container 1 ((1) in FIG. 1). Discharged.
- the refrigerant and the lubricating oil mixed in the refrigerant in a sprayed state are separated, and the separated lubricating oil is returned to the lower oil sump 2 from the oil return hole 12a opened in the lower bearing member 12.
- the refrigerant flowing into the motor stator lower space in the motor lower space 5 flows from the motor rotor lower space ((4) in FIG. 1) in the motor lower space 5 to the rotor air hole 26.
- 1 is a blade inner flow path 46 of the centrifugal impeller 40 attached to the upper portion of the rotor 6 (the flow path on the inner peripheral side of the inner peripheral flow guide 42, indicated by (5) in FIG. 1).
- the refrigerant flowing into the blade inner flow path 46 is sucked into the inter-blade flow path 47 formed between the blades 41 of the centrifugal impeller 40 and flows to the outer peripheral side while being increased in pressure by the rotational speed of the centrifugal impeller 40.
- the cylindrical side wall 37 is raised from the balancer fixed bottom plate 38 to reduce the channel area of the short-circuit channel 23 and increase the channel resistance. Further, by bending the lower end portion of the discharge cover 56, the flow path shape of the short circuit path 23 is complicated, and the flow path resistance of the short circuit path 23 is further increased.
- the centrifugal impeller 40 disposed above the rotor 6 and the motor upper coil crossing portion 7a are partitioned by the cylindrical side wall 37.
- the refrigerant gas increased in pressure by the centrifugal impeller 40 flows back into the motor stator upper space 9a ((2) in FIG. 1) through the radial flow path 28 in the motor upper coil crossing portion 7a.
- the motor rotor upper space 9b ((6) in FIG. 1) can be boosted.
- the rotor air hole serves as a refrigerant flow path that rises from the motor lower space 5 ((3) or (4) in FIG. 1) to the motor upper space 9 ((2) or (5) in FIG. 1).
- stator inner circumferential flow path 27 air gap 27a, core inner circumferential notch flow path 27b
- the refrigerant gas passing through the stator inner circumferential flow path 27 cannot obtain the pressure increase effect by the centrifugal impeller 40.
- the stator inner peripheral flow path 27 is closed as much as possible, a great effect as a pressure increasing effect by the centrifugal impeller 40 can be obtained. Therefore, in the first embodiment, in order to slightly increase the outer peripheral diameter of the balancer fixed bottom plate 38 (for example, about 1 mm), the stator inner peripheral flow passage blocking portion 38b is provided on the outer peripheral portion of the disc portion 38a. The upper part of was obstructed. Thereby, the quantity of the refrigerant gas which passes along the stator inner peripheral flow path 27 can be suppressed, and the electric motor rotor upper space 9b ((6) in FIG. 1) can be further boosted.
- the motor rotor upper space 9b ((6) in FIG. 1) is boosted by the centrifugal impeller 40, and the motor stator lower space (in FIG. 1) from the motor stator upper space 9a ((2) in FIG. 1). (3)), the pressure (P 6 ) of the motor rotor upper space 9b ((6) in FIG. 1) is changed to the motor stator upper space 9a (FIG. 1). It is necessary to design the blade shape and the flow path of the centrifugal impeller 40 so as to be larger than the pressure (P 2 ) in (2)). Further, since the compressor input (power consumption) increases in order to boost the centrifugal impeller 40, it is also important to design the centrifugal impeller 40 with high efficiency.
- Non-Patent Document 2 (p132), among centrifugal fans, the turbo fan (the direction of the blades in the retreat direction with respect to the rotation direction) is efficient, so the shape of the blade 41 of the centrifugal impeller 40 is rotated.
- the eight blades 41 having the shape are arranged symmetrically with respect to the drive shaft 3. Further, the entrance angle of the blade 41 is determined so as to contact the circle formed by the end point on the inner peripheral side of the blade 41 within a range of ⁇ 5 degrees.
- Non-Patent Document 1 when the incident angle ib, which is the difference between the relative inflow angle ⁇ 1 and the blade inlet angle ⁇ 1b at the impeller inlet, is 2 to 5 degrees or more, a collision loss occurs, which causes the compressor loss. It is to become. Further, in order to increase the ratio (passage rate) of the refrigerant that has passed through the rotor air hole 26 flows from the inner peripheral side of the centrifugal impeller 40 and passes through to the outer peripheral side, the following points were noted.
- the rotor air hole 26 is disposed so as to be inside the inner circumferential flow guide 42 in plan view.
- the blade upper disk 43 and the blade lower disk 44 that cover the upper and lower sides of the blades 41 are disks that cover the inner periphery side to the outer periphery side of the plurality of blades 41. Thereby, the boosting effect by the centrifugal impeller 40 becomes larger, and the motor rotor upper space 9b ((6) in FIG. 1) can be further boosted.
- the hermetic compressor 100 configured as in the first embodiment, by utilizing the rotation of the rotor 6 in the hermetic container 1, the motor rotor upper space 9b ((6) in FIG. 1) is provided.
- the voltage can be boosted.
- the hermetic compressor 100 of 3 horsepower constant speed (50 rps) if the Ashrae condition operation is performed with the R22 refrigerant, the effect of boosting the motor rotor upper space 9b ((6) in FIG. 1) by several kPa level is obtained. .
- the refrigerant flows directly from the motor stator upper space 9a ((2) in FIG. 1) into the motor rotor upper space 9b ((6) in FIG. 1) via the short-circuit channel 23, and is separated.
- FIG. FIG. 4 is a longitudinal sectional view showing the structure of a hermetic compressor according to Embodiment 2 of the present invention.
- FIG. 5 is a cross-sectional view (cross-sectional view taken along the line AA in FIG. 4) showing the structure of the hermetic compressor according to the second embodiment of the present invention.
- FIG. 6 is a perspective view showing a rotary pressure raising mechanism provided above the rotor of the hermetic compressor according to the second embodiment of the present invention.
- the black arrow shown in FIG. 5 shows the rotation direction of a rotation pressure
- FIG. 6 shows a rotary pressure increasing mechanism observed from the direction of the three-dimensional arrow shown in FIG.
- the hermetic compressor 100 according to the second embodiment will be described with reference to FIGS. 4 to 6. Since the basic structure and operation of the hermetic compressor 100 according to the second embodiment are the same as those of the first embodiment, the description thereof is omitted.
- the centrifugal impeller 40 When the centrifugal impeller 40 is configured as in the second embodiment, the fan efficiency is higher than that of the centrifugal impeller 40 according to the first embodiment in which the blades 41 are arranged axisymmetrically with respect to the fan efficiency. Decreases.
- the pressure pulsation caused by the centrifugal impeller 40 is smaller than that of the centrifugal impeller 40 according to the first embodiment in which the blades 41 are arranged symmetrically. It may increase and cause vibration and noise. For this reason, when importance is attached to fan efficiency and vibration / noise prevention, the centrifugal impeller 40 is preferably configured as in the first embodiment.
- the cylindrical side wall 37 that prevents the short-circuit flow of the refrigerant from the short-circuit channel 23 and the balancer fixing bottom plate 38 that fixes the cylindrical side wall 37 are configured as separate members.
- the cylindrical side wall 37 and the balancer fixed bottom plate 38 according to the first embodiment are configured by an oil separation cup 36 in which the cylindrical side wall 36a and the bottom plate 36b are integrally processed.
- the oil separation cup 36 is also provided with an oil drain hole 36c on the rotation direction front end portion 31a side of the upper counterweight 31 as in the first embodiment.
- the hermetic compressor 100 configured as in the second embodiment it is possible to prevent a decrease in the amount of stored lubricating oil in the hermetic container 1, and to suppress the decrease in reliability due to poor lubrication, Although the effect of suppressing the decrease in energy saving performance is inferior to that of the first embodiment, an effect equivalent to that can be obtained.
- the hermetic compressor 100 configured as in the second embodiment has an advantage that the manufacturing cost of the centrifugal impeller 40 can be reduced as compared with the first embodiment.
- the hermetic compressor 100 according to the second embodiment differs from the hermetic compressor 100 shown in the first embodiment.
- the lower end portion of the discharge cover 56 is not bent, and the short-circuit channel 23 has a simple shape.
- the flow path resistance of the short circuit flow path 23 is determined by the minimum gap formed between the discharge cover 56 and the cylindrical side wall 36a.
- the hermetic compressor 100 according to the second embodiment is not provided with a closing member (a member corresponding to the stator inner peripheral flow path blocking portion 38b according to the first embodiment) that closes the stator inner peripheral flow path 27.
- FIG. 7 is a longitudinal sectional view showing the structure of a hermetic compressor according to Embodiment 3 of the present invention.
- FIG. 8 is a transverse sectional view (AA sectional view of FIG. 7) showing the structure of the hermetic compressor according to the third embodiment of the present invention.
- the black arrow shown in FIG. 8 shows the rotation direction of a rotation pressure
- the hermetic compressor 100 according to the third embodiment will be described with reference to FIGS. 7 and 8. Note that the basic structure and operation of the hermetic compressor 100 according to the third embodiment are the same as those of the first embodiment, and a description thereof will be omitted.
- the centrifugal impeller 40 according to the third embodiment is located at a position without the upper counterweight 31 among the eight blades 41 of the centrifugal impeller 40 of the first embodiment.
- the height of these four blades 41 is designed to be the same as that of the upper counterweight 31 while leaving only four on one side.
- the centrifugal impeller 40 according to the third embodiment is different from the second embodiment in that the blades 41 are arranged in a radial direction (a direction orthogonal to the rotation direction of the drive shaft 3).
- the fan efficiency is inferior to that of the turbo fan, there is an advantage that the centrifugal impeller 40 can be easily manufactured.
- the cylindrical side walls (the cylindrical side wall 37 and the cylindrical side wall 36a) that prevent the short-circuit flow of the refrigerant from the short-circuit channel 23 are arranged on the upper portion of the rotor 6, and The rotor 6 was configured to rotate together.
- the closing cover 29 (more specifically, the cylindrical portion 29a) corresponding to the cylindrical side wall is closed inside the motor upper coil crossing portion 7a of the stator 7 and the radial flow path 28 is closed.
- the closing cover 29 is provided with a protruding portion 29b that closes the upper portion of the stator inner peripheral flow path 27 on the inner peripheral side of the cylindrical portion 29a.
- the protrusion 29b corresponds to the stator inner peripheral flow path blocking portion 38b of the first embodiment, and the minimum gap 29c with the disc portion 38a of the balancer fixed bottom plate 38 is small in the range where there is no electrical short (for example, (About 1 to 2 mm).
- the boosting effect obtained by rotating the cylindrical side wall around the drive shaft cannot be obtained.
- the hermetic compressor 100 configured as in the third embodiment, it is possible to prevent a decrease in the storage amount of the lubricating oil in the hermetic container 1, and to suppress a decrease in reliability due to poor lubrication, Although the effect of suppressing the decrease in energy saving performance is inferior to that of the first embodiment, an effect equivalent to that can be obtained.
- FIG. 9 is a longitudinal sectional view showing the structure of a hermetic compressor according to Embodiment 4 of the present invention.
- FIG. 10 is a transverse sectional view (AA sectional view of FIG. 9) showing the structure of the hermetic compressor according to the fourth embodiment of the present invention.
- FIG. 11 is a perspective view showing a rotary pressure raising mechanism provided above the rotor of the hermetic compressor according to the fourth embodiment of the present invention.
- the black arrow shown in FIG. 10 shows the rotation direction of a rotation pressure
- FIG. 11 shows the rotary pressure increasing mechanism observed from the direction of the three-dimensional arrow shown in FIG.
- the hermetic compressor 100 according to the fourth embodiment will be described with reference to FIGS. 9 to 11. Note that the basic structure and operation of the hermetic compressor 100 according to the fourth embodiment are the same as those of the first embodiment, and a description thereof will be omitted.
- the hermetic compressor 100 according to the fourth embodiment has the same configuration as that of the hermetic compressor 100 shown in the second embodiment except for the configuration of the rotary pressurizing mechanism 49.
- the rotary pressure raising mechanism 49 of the fourth embodiment has a configuration in which all the blades 41 are removed from the centrifugal impeller 40 shown in the first embodiment.
- the rotation boosting mechanism 49 of the fourth embodiment includes the oil separation rotating disk 35 corresponding to the blade upper disk 43 of the first embodiment, the blade lower disk 44 and the inner disk of the first embodiment.
- the balancer cover 30 includes a rotating disk 30b corresponding to the circumferential flow guide 42 and an inner flow guide 30c.
- the refrigerant flowing out of the rotor air hole 26 flows into the inner flow path 30a formed on the inner peripheral side of the inner peripheral flow guide 30c, and the rotary disk 30b and the oil Passes between the rotary disk for separation 35 and flows out into the motor rotor upper space 9b ((6) in FIG. 9) through the cup inner passage 36d formed on the inner peripheral side of the oil separation cup 36. Will be.
- the rotation boosting mechanism 49 of the fourth embodiment cannot obtain a large boosting effect (for example, several kPa level) by the centrifugal impeller, the rotation disk 30b of the balancer cover 30, the oil separation rotating disk 35, and the oil separation A pressure increasing effect (for example, 1 kPa or less) is obtained by the rotation of the cylindrical side wall 36a of the cup 36.
- the hermetic compressor 100 configured as in the fourth embodiment it is possible to prevent a decrease in the amount of stored lubricating oil in the hermetic container 1, and to suppress the decrease in reliability due to poor lubrication,
- the effect of suppressing the decrease in energy saving performance is inferior to that of the first embodiment (for example, half or less), and an effect equivalent to that is obtained.
- the hermetic compressor 100 configured as in the fourth embodiment has an advantage that the manufacturing cost of the rotary pressurizing mechanism 49 can be reduced as compared with the first embodiment.
- the present invention has been described by taking the high-pressure shell hermetic scroll compressor as an example.
- the arrangement of the rotor 6 and the stator 7 of the electric motor 8 is the same, and the refrigerant is on the lower side of the electric motor. If the flow from the space 5 to the motor upper space 9 is the same, the same effects as those of the first to fourth embodiments can be obtained with respect to other rotary compression methods (sliding vane method, swing method, etc.).
- Embodiment 5 FIG. In the fifth embodiment, an example of a vapor compression refrigeration cycle apparatus including the hermetic compressor 100 shown in the first to fourth embodiments will be described.
- FIG. 12 is a configuration diagram showing the vapor compression refrigeration cycle apparatus 101 according to the fifth embodiment.
- the vapor compression refrigeration cycle apparatus 101 includes a hermetic compressor 100 shown in any of the first to fourth embodiments, a radiator 102 that radiates heat from the refrigerant compressed by the hermetic compressor 100, and heat radiation.
- An expansion mechanism 103 that expands the refrigerant that has flowed out of the vessel 102 and an evaporator 104 that absorbs heat from the refrigerant that has flowed out of the expansion mechanism 103 are provided.
- the hermetic compressor 100 shown in any of Embodiments 1 to 4 for the vapor compression refrigeration cycle apparatus 101, energy saving efficiency of the vapor compression refrigeration cycle apparatus 101 is improved and vibration noise is reduced. Reliability can be improved.
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Abstract
Description
図1は本発明の実施の形態1による密閉形圧縮機の構造を示す縦断面図である。図2は本発明の実施の形態1による密閉形圧縮機の構造を示す横断面図(図1のA-A断面図)である。また、図3は本発明の実施の形態1による密閉形圧縮機の回転子の上方に設けられた回転昇圧機構を示す斜視図である。なお、図2に示す黒塗り矢印は回転昇圧機構の回転方向を示すものである。また、図3は、図2に図示された立体的な矢印の方向から観察した回転昇圧機構を示している。
まず、これら図1~図3を用いて、本実施の形態1に係る密閉形圧縮機100の基本構造及び動作を説明する。
1 is a longitudinal sectional view showing the structure of a hermetic compressor according to
First, the basic structure and operation of the
本実施の形態1に係る密閉形圧縮機100は高圧シェル密閉形スクロール圧縮機であり、底部に潤滑油を貯留する下部油溜り2が形成された密閉容器1と、該密閉容器1の内部に収容された電動機8、駆動軸3、圧縮機構60及び回転昇圧機構49等と、を備えている。 <Basic structure and operation of
A
吐出ポート18から吐出された冷媒は、圧縮機構筐体50の外周側と密閉容器1と隙間で形成される冷媒流路57を下方向に流れて電動機固定子上側空間9a(図1中の(2))に達する。さらに、この冷媒は、固定子7のコア7cと密閉容器1との間に形成された固定子外周流路25を下方向に流れて電動機下側空間5のうちの電動機固定子下側空間(図1中の(3))に流入し、副軸受け部54を形成する下側軸受け部材12まで到達する。この過程で冷媒と該冷媒に噴霧状態で混入する潤滑油とは分離し、分離した潤滑油は下側軸受け部材12に開けられた油戻し穴12aから下部油溜り2に還流される。 <Refrigerant flow in sealed container>
The refrigerant discharged from the
電動機上部コイル渡り部7aが吐出カバー56と電気的短絡をしないために、電動機上部コイル渡り部7aと吐出カバー56との間の隙間である短絡流路23が必要となる。このため、吐出空間10(図1中の(1))から電動機回転子上側空間9b(図1中の(6))に達する過程で、電動機固定子下側空間(図1中の(3))を経ないで電動機固定子上側空間9a(図1中の(2))から電動機回転子上側空間9b(図1中の(6))に冷媒が直接流れ込んで分離されていない油滴が大量に密閉容器1から外部回路へ流出し、密閉形圧縮機100の性能と信頼性の低下、蒸気圧縮式冷凍サイクル装置(特に熱交換器)の性能低下を引き起こすことが懸念される。 <Short-
In order for the motor upper
1)電動機回転子上側空間9b(図1中の(6))への短絡流路23の流路抵抗を十分大きくすることと、
2)電動機回転子上側空間9b(図1中の(6))を昇圧して、電動機固定子上側空間9aの圧力に近づけるか、または、より高圧にすること、
が必要である。 Therefore, in order to reduce the flow of the refrigerant that is short-circuited and directly discharged from the short-
1) sufficiently increasing the channel resistance of the short-
2) Increase the pressure of the motor rotor
is required.
ここで、電動機下側空間5(図1中の(3)又は(4))から電動機上側空間9(図1中の(2)又は(5))へ上昇する冷媒流路として、回転子風穴26以外にも固定子内周流路27(エアギャップ27a、コア内周部切欠き流路27b)が存在し、固定子内周流路27を通る冷媒ガスは遠心羽根車40による昇圧効果が得られない。このため、できるだけ固定子内周流路27を塞いだほうが、遠心羽根車40による昇圧効果として大きな効果が得られる。そこで、本実施の形態1では、バランサ固定底板38の外周径を少し(例えば1mm程度)大きくするために円板部38aの外周部に固定子内周流路閉塞部38bを設け、固定子内周流路27の上方を閉塞した。これにより、固定子内周流路27を通る冷媒ガスの量を抑制でき、電動機回転子上側空間9b(図1中の(6))をさらに昇圧できる。 In the first embodiment, the
Here, the rotor air hole serves as a refrigerant flow path that rises from the motor lower space 5 ((3) or (4) in FIG. 1) to the motor upper space 9 ((2) or (5) in FIG. 1). In addition to the
遠心羽根車40で電動機回転子上側空間9b(図1中の(6))を昇圧し、電動機固定子上側空間9a(図1中の(2))から電動機固定子下側空間(図1中の(3))に100%近く冷媒が流れるようにするためには、電動機回転子上側空間9b(図1中の(6))の圧力(P6)が電動機固定子上側空間9a(図1中の(2))の圧力(P2)より大きくなるように遠心羽根車40の羽根形状や流路を設計することが必要である。また、遠心羽根車40を昇圧するために圧縮機入力(消費電力)は増加するので、遠心羽根車40を高効率に設計することも重要である。 <Design of centrifugal impeller>
The motor rotor
・回転子風穴26は、平面視において内周側流れガイド42より内側となるように配置した。
・羽根41の上下を覆う羽根上側円板43及び羽根下側円板44は、複数枚の羽根41の内周側から外周側までを覆い隠す円板とした。
これにより、遠心羽根車40による昇圧効果がより大きくなり、電動機回転子上側空間9b(図1中の(6))をさらに昇圧できる。 According to Non-Patent Document 2 (p132), among centrifugal fans, the turbo fan (the direction of the blades in the retreat direction with respect to the rotation direction) is efficient, so the shape of the
The
The blade
Thereby, the boosting effect by the
本実施の形態1のように構成された密閉形圧縮機100においては、密閉容器1内で回転子6の回転を利用して、電動機回転子上側空間9b(図1中の(6))を昇圧することができる。たとえば、3馬力一定速(50rps)の密閉形圧縮機100において、R22冷媒でAshrae条件運転すると、電動機回転子上側空間9b(図1中の(6))を数kPaレベル昇圧する効果が得られる。その結果、短絡流路23を介して電動機固定子上側空間9a(図1中の(2))から電動機回転子上側空間9b(図1中の(6))に冷媒が直接流れ込んで分離されていない油滴が大量に密閉容器1から外部回路へ流出することを低減することができる。さらに、封入した潤滑油を有効活用するため、密閉形圧縮機100の性能低下を抑える効果と、密閉容器1内の貯油量が減少し潤滑不良による信頼性低下を抑える効果が得られる。 <Effect>
In the
図4は本発明の実施の形態2による密閉形圧縮機の構造を示す縦断面図である。図5は本発明の実施の形態2による密閉形圧縮機の構造を示す横断面図(図4のA-A断面図)である。また、図6は本発明の実施の形態2による密閉形圧縮機の回転子の上方に設けられた回転昇圧機構を示す斜視図である。なお、図5に示す黒塗り矢印は回転昇圧機構の回転方向を示すものである。また、図6は、図5に図示された立体的な矢印の方向から観察した回転昇圧機構を示している。
以下、これら図4~図6を用いて、本実施の形態2に係る密閉形圧縮機100について説明する。なお、本実施の形態2に係る密閉形圧縮機100の基本構造と動作は上記実施の形態1と同様であるので説明は省略する。
FIG. 4 is a longitudinal sectional view showing the structure of a hermetic compressor according to
Hereinafter, the
なお、本実施の形態2のように遠心羽根車40を構成した場合、軸対称にファン効率の軸対称に羽根41を配置した実施の形態1に係る遠心羽根車40と比較して、ファン効率が低下する。また、本実施の形態2のように遠心羽根車40を構成した場合、軸対称に羽根41を配置した実施の形態1に係る遠心羽根車40と比較して、遠心羽根車40による圧力脈動が増加し、振動・騒音の要因にもなりうる。このため、ファン効率や振動・騒音の防止を重視する場合には、実施の形態1のように遠心羽根車40を構成することが好ましい。 (1) In the second embodiment, among the eight
When the
・本実施の形態2に係る密閉形圧縮機100は、吐出カバー56の下端部が折り曲げ加工されておらず、短絡流路23が単純な形状となっている。このため、本実施の形態2に係る密閉形圧縮機100においては、短絡流路23の流路抵抗は吐出カバー56と円筒側壁36aとの間に形成される最小隙間で決定される。
・また、本実施の形態2に係る密閉形圧縮機100は、固定子内周流路27を塞ぐ閉塞部材(実施の形態1の固定子内周流路閉塞部38bに相当する部材)を設けていない。 (3) Other differences between the
In the
Further, the
図7は本発明の実施の形態3による密閉形圧縮機の構造を示す縦断面図である。図8は本発明の実施の形態3による密閉形圧縮機の構造を示す横断面図(図7のA-A断面図)である。なお、図8に示す黒塗り矢印は回転昇圧機構の回転方向を示すものである。
以下、これら図7及び図8を用いて、本実施の形態3に係る密閉形圧縮機100について説明する。なお、本実施の形態3に係る密閉形圧縮機100の基本構造と動作は上記実施の形態1と同様であるので説明は省略する。
FIG. 7 is a longitudinal sectional view showing the structure of a hermetic compressor according to
Hereinafter, the
図9は本発明の実施の形態4による密閉形圧縮機の構造を示す縦断面図である。図10は本発明の実施の形態4による密閉形圧縮機の構造を示す横断面図(図9のA-A断面図)である。また、図11は本発明の実施の形態4による密閉形圧縮機の回転子の上方に設けられた回転昇圧機構を示す斜視図である。なお、図10に示す黒塗り矢印は回転昇圧機構の回転方向を示すものである。また、図11は、図10に図示された立体的な矢印の方向から観察した回転昇圧機構を示している。
以下、これら図9~図11を用いて、本実施の形態4に係る密閉形圧縮機100について説明する。なお、本実施の形態4に係る密閉形圧縮機100の基本構造と動作は上記実施の形態1と同様であるので説明は省略する。
FIG. 9 is a longitudinal sectional view showing the structure of a hermetic compressor according to
Hereinafter, the
本実施の形態5では、実施の形態1~実施の形態4で示した密閉形圧縮機100を備えた蒸気圧縮式冷凍サイクル装置の一例について説明する。
In the fifth embodiment, an example of a vapor compression refrigeration cycle apparatus including the
60 圧縮機構、100 密閉形圧縮機、101 蒸気圧縮式冷凍サイクル装置、102 放熱器、103 膨張機構、104 蒸発器。 DESCRIPTION OF SYMBOLS 1 Airtight container, 2 Lower oil sump, 3 Drive shaft, 3a Hollow hole, 3b Oil supply hole, 4 Compression chamber, 5 Motor lower space, 6 Rotor, 7 Stator, 7a Motor upper coil transition part, 7b Motor lower coil Crossover, 7c core, 8 motor, 9 motor upper space, 9a motor stator upper space, 9b motor rotor upper space, 10 discharge space, 11 upper bearing member, 12 lower bearing member, 12a oil return hole, 18 discharge Port, 21 Compressor suction pipe, 22 Compressor discharge pipe, 23 Short circuit flow path, 25 Stator outer peripheral flow path, 26 Rotor air hole, 27 Stator inner peripheral flow path, 27a Air gap, 27b Core inner peripheral notch flow path , 28 Radial direction flow path, 29 Closure cover, 29a Cylindrical portion 29b Stator inner circumferential flow path obstruction projection, 29c Minimum gap, 30 Balancer cover, 30a Inner flow path, 30b Rotating circle 30c Inner peripheral flow guide, 31 Upper counterweight, 31a Rotation direction front end, 31b Rotation direction rear end, 32 Lower balance weight, 33 Rotor upper end fixed substrate, 34 Rotor lower end fixed substrate, 35 For oil separation Rotating disc (single unit), 36 Oil separating cup 36a Cylindrical side wall, 36b Bottom plate, 36c Oil drain hole, 36d Cup inner channel, 37 Cylindrical side wall (single unit), 38 Balancer fixed bottom plate, 38a Disc part 38b In stator Circumferential flow passage block, 39 Oil drain hole, 40 Centrifugal impeller, 41 blade, 42 Inner flow guide, 43 Upper blade disk, 44 Lower blade disk, 46 Inner flow channel, 47 Inter-blade flow channel, 48 Blade outer flow path, 49 Rotation pressure increase mechanism, 50 Compression mechanism housing, 51 Fixed scroll, 52 Orbiting scroll, 54 Sub-bearing portion, 55 Main bearing portion, 56 Discharge cover, 56a Opening portion, 5 7 Refrigerant flow path,
60 compression mechanism, 100 hermetic compressor, 101 vapor compression refrigeration cycle apparatus, 102 radiator, 103 expansion mechanism, 104 evaporator.
Claims (10)
- 底部に潤滑油を貯蔵する密閉容器と、
前記密閉容器の内部に設けられ、固定子及び上下方向に貫通する回転子風穴が形成された回転子を有する電動機と、
前記回転子に取り付けられた駆動軸と、
前記密閉容器の内部に設けられ、前記駆動軸の回転によって冷媒を圧縮する圧縮機構と、
前記回転子の上方に設けられ、前記駆動軸周りに回転しながら冷媒ガスを通過させ昇圧する回転昇圧機構と、
前記回転子側である内側空間にある前記回転昇圧機構を囲むように、前記電動機の上側空間を固定子側である外側空間と仕切る円筒側壁と、
前記内側空間に連通し、該空間から冷媒を前記密閉容器の外部回路に流出させる吐出管と、
を備え、
前記圧縮機構で圧縮されて前記密閉容器内に吐出された冷媒ガスは、前記電動機の下側空間から前記回転子風穴を通って前記回転子の上端まで移動して前記回転昇圧機構に流入し昇圧された後、前記内側空間に流れて該内側空間を昇圧し、前記外側空間から前記内側空間への冷媒ガスの流入を抑制しながら前記吐出管より外部へ吐出されることを特徴とする密閉形圧縮機。 A sealed container for storing lubricating oil at the bottom;
An electric motor having a rotor provided inside the sealed container and having a stator and a rotor air hole penetrating in a vertical direction;
A drive shaft attached to the rotor;
A compression mechanism that is provided inside the sealed container and compresses the refrigerant by rotation of the drive shaft;
A rotary pressurizing mechanism that is provided above the rotor and that allows the refrigerant gas to pass therethrough while rotating around the drive shaft;
A cylindrical side wall that partitions the upper space of the electric motor from the outer space on the stator side so as to surround the rotary pressure boosting mechanism in the inner space on the rotor side;
A discharge pipe that communicates with the inner space and causes the refrigerant to flow out of the space to an external circuit of the sealed container;
With
The refrigerant gas compressed by the compression mechanism and discharged into the hermetic container moves from the lower space of the electric motor through the rotor air hole to the upper end of the rotor, flows into the rotary pressure increasing mechanism, and increases the pressure. Then, the sealed space is characterized in that it flows into the inner space, pressurizes the inner space, and is discharged to the outside from the discharge pipe while suppressing the inflow of the refrigerant gas from the outer space to the inner space. Compressor. - 前記回転昇圧機構は、
駆動軸を中心として、前記駆動軸周りに回転することで、冷媒ガスを内周側の入口から流入させて昇圧させながら外周側の出口より流出させる遠心羽根車であることを特徴とする請求項1に記載の密閉形圧縮機。 The rotational pressure increasing mechanism is
The centrifugal impeller, which rotates around the drive shaft about the drive shaft, causes the refrigerant gas to flow from the inner peripheral side inlet and to increase the pressure while flowing out from the outer peripheral side outlet. The hermetic compressor according to 1. - 前記円筒側壁は、前記遠心羽根車の外周側の出口を囲むように配置されていることを特徴とする請求項1に記載の密閉形圧縮機。 The hermetic compressor according to claim 1, wherein the cylindrical side wall is disposed so as to surround an outlet on an outer peripheral side of the centrifugal impeller.
- 前記遠心羽根車は、
羽根の下側から前記遠心羽根車に冷媒ガスが流入するのを遮る下面板と、
羽根の上側から前記遠心羽根車に冷媒ガスが流入するのを遮る上面板と、
前記回転子風穴以外の流路から前記遠心羽根車の内周側の入口へ冷媒ガスが流入するのを防ぐ仕切り板と、
を備えたことを請求項2又は請求項3に記載の特徴とする密閉形圧縮機。 The centrifugal impeller is
A bottom plate that blocks refrigerant gas from flowing into the centrifugal impeller from below the blade;
A top plate that blocks refrigerant gas from flowing into the centrifugal impeller from above the blades;
A partition plate for preventing refrigerant gas from flowing from the flow path other than the rotor air hole to the inlet on the inner peripheral side of the centrifugal impeller;
A hermetic compressor according to claim 2 or 3, characterized by comprising: - 前記固定子には、コアに巻かれたコイルが該固定子の上端から突出した部分である電動機上部コイル渡り線部が複数形成され、
前記円筒側壁は、前記回転昇圧機構と前記電動機上部コイル渡り線部との間を仕切ることを特徴とする請求項1~請求項4のいずれか一項に記載の密閉形圧縮機。 The stator is formed with a plurality of motor upper coil crossover portions that are portions of the coil wound around the core projecting from the upper end of the stator,
The hermetic compressor according to any one of claims 1 to 4, wherein the cylindrical side wall partitions the rotary pressure raising mechanism and the motor upper coil connecting wire portion. - 前記回転子と前記固定子との間に形成される流路の上方を閉塞する閉塞部材を備えたことを特徴とする請求項1~請求項5のいずれか一項に記載の密閉形圧縮機。 The hermetic compressor according to any one of claims 1 to 5, further comprising a closing member that closes an upper portion of a flow path formed between the rotor and the stator. .
- 前記円筒側壁は、前記回転子の上端に設けられて前記回転子と共に回転することを特徴とする請求項1~請求項6のいずれか一項に記載の密閉形圧縮機。 The hermetic compressor according to any one of claims 1 to 6, wherein the cylindrical side wall is provided at an upper end of the rotor and rotates together with the rotor.
- 前記圧縮機構は前記電動機の上方に設けられ、
前記圧縮機構で圧縮されて前記密閉容器内に吐出された冷媒ガスは、前記外側空間から前記固定子と前記密閉容器との間に形成された固定子外周流路を通って前記電動機の下側空間に流入した後、該電動機の下側空間から前記回転子風穴を通って前記回転子の上端まで移動して前記回転昇圧機構に流入して昇圧され、前記内側空間に流れて該内側空間を昇圧し、前記外側空間から前記内側空間への冷媒ガスの流入を抑制しながら前記吐出管より外部へ吐出されることを特徴とする請求項1~請求項7のいずれか一項に記載の密閉形圧縮機。 The compression mechanism is provided above the electric motor,
The refrigerant gas compressed by the compression mechanism and discharged into the sealed container passes through the stator outer peripheral flow path formed between the stator and the sealed container from the outer space, and is below the electric motor. After flowing into the space, it moves from the lower space of the electric motor through the rotor air hole to the upper end of the rotor, flows into the rotary pressure boosting mechanism, is pressurized, flows into the inner space, and passes through the inner space. The hermetic seal according to any one of claims 1 to 7, wherein the pressure is increased and the refrigerant is discharged from the discharge pipe to the outside while suppressing an inflow of refrigerant gas from the outer space to the inner space. Shape compressor. - 前記圧縮機構の下部に、前記電動機の上側空間における前記円筒側壁より上側部分を前記外側空間と前記内側空間とに仕切る吐出カバーを備え、
該吐出カバーと前記円筒側壁とにより、前記外側空間と前記内側空間とを連通する短絡流路の流路抵抗を増加させていることを特徴とする請求項8に記載の密閉形圧縮機。 A lower part of the compression mechanism includes a discharge cover that partitions an upper part of the upper side space of the electric motor from the cylindrical side wall into the outer space and the inner space,
9. The hermetic compressor according to claim 8, wherein the discharge cover and the cylindrical side wall increase a flow resistance of a short-circuit flow path that communicates the outer space and the inner space. - 請求項1~請求項9のいずれか一項に記載の圧縮機と、
該圧縮機で圧縮された冷媒から放熱させる放熱器と、
該放熱器から流出した冷媒を膨張させる膨張機構と、
該膨張機構から流出した冷媒に吸熱させる蒸発器と、
を備えたことを特徴とする蒸気圧縮式冷凍サイクル装置。 The compressor according to any one of claims 1 to 9,
A radiator that dissipates heat from the refrigerant compressed by the compressor;
An expansion mechanism for expanding the refrigerant flowing out of the radiator;
An evaporator for absorbing heat from the refrigerant flowing out of the expansion mechanism;
A vapor compression refrigeration cycle apparatus comprising:
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JP2016508386A JPWO2015140949A1 (en) | 2014-03-19 | 2014-03-19 | Hermetic compressor and vapor compression refrigeration cycle apparatus including the hermetic compressor |
US15/126,203 US20170089624A1 (en) | 2014-03-19 | 2014-03-19 | Hermetic compressor and vapor compression-type refrigeration cycle device including the hermetic compressor |
PCT/JP2014/057464 WO2015140949A1 (en) | 2014-03-19 | 2014-03-19 | Hermetic compressor and vapor compression refrigeration cycle device with said hermetic compressor |
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