EP3495659B1 - Compressor - Google Patents
Compressor Download PDFInfo
- Publication number
- EP3495659B1 EP3495659B1 EP18208169.5A EP18208169A EP3495659B1 EP 3495659 B1 EP3495659 B1 EP 3495659B1 EP 18208169 A EP18208169 A EP 18208169A EP 3495659 B1 EP3495659 B1 EP 3495659B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bracket
- stator core
- core
- support member
- coupling portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008878 coupling Effects 0.000 claims description 98
- 238000010168 coupling process Methods 0.000 claims description 98
- 238000005859 coupling reaction Methods 0.000 claims description 98
- 239000012212 insulator Substances 0.000 claims description 31
- 238000003780 insertion Methods 0.000 claims description 19
- 230000037431 insertion Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 description 17
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- 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
- F04B39/0261—Hermetic compressors with an auxiliary oil pump
-
- 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
- F04B39/0276—Lubrication characterised by the compressor type the pump being of the reciprocating piston type, e.g. oscillating, free-piston 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
- F04B39/14—Provisions for readily assembling or disassembling
-
- 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
Definitions
- the present disclosure relates to a compressor having an improved oil supply structure.
- a compressor is a machine which receives power from a power generator, such as a motor or a turbine, and compresses air, a refrigerant, or other various operating gas to increase pressure.
- a power generator such as a motor or a turbine
- the compressor is widely used in home appliances, such as a refrigerator, an air conditioner, etc., or industrial machinery.
- Compressors are classified into a reciprocating compressor, a rotary compressor, and a scroll compressor according to compressing methods and sealing structures.
- the reciprocating compressor has a structure that forms compressing space in which operating gas is inhaled or discharged between a piston and a cylinder to compress a refrigerant when the piston performs a linear reciprocating motion in the inside of the cylinder.
- a hermetic reciprocating compressor includes compressing mechanism for compressing a refrigerant through a reciprocating motion of a piston and electrically-driven mechanism for driving the compressing mechanism, wherein the compressing mechanism and the electrically-driven mechanism are installed in the inside of a single case.
- the hermetic reciprocating compressor includes a shaft for transferring a driving force of the electrically-driven mechanism to the compressing mechanism.
- a shaft for transferring a driving force of the electrically-driven mechanism to the compressing mechanism.
- oil for lubricating and cooling the components of the individual mechanisms is stored, and the shaft includes an oil supply structure for raising the oil to supply it to the components.
- centrifugal pump structure that supplies oil upward by the centrifugal force of a shaft
- viscous liquid pump structure that supplies oil upward by the viscosity of oil
- the viscous liquid pump structure includes a rotation shaft having a cavity through which oil moves, a pickup shaft accommodated in the cavity of the rotation shaft, and a support member for supporting the pickup shaft.
- WO00/01949 and US2002/0170779 relate to oil supply systems for hermetic compressors having a support bracket coupled to the lower portion of a stator and a sucking member.
- RPM revolutions per minute
- a compressor including: a case; a stator, accommodated in the case, and including a stator core; a rotor rotatably disposed in an inside of the stator core; a bracket coupled to a lower portion of the stator core; a rotation shaft configured to rotate together with the rotor, and having a cavity for raising oil stored in the case; a pickup shaft accommodated in the cavity; and a support member connected to the pickup shaft to support the pickup shaft, and coupled to the bracket or the stator core.
- the stator includes an insulator disposed below the stator core.
- the bracket may be made of a material having higher strength than a material of the insulator.
- the bracket may be made of steel.
- the bracket may include a bracket body, and a coupling portion which is provided in the bracket body and to which the support member is coupled.
- the coupling portion may include a coupling portion body extending downward from the bracket body, and an accommodating space which is provided in the coupling portion body and in which the support member is inserted.
- the support member may include an insertion portion inserted in the accommodating space.
- the insertion portion inserted in the accommodating space may be positioned between the coupling portion body and the stator core.
- the insertion portion inserted in the accommodating space may be spaced from the bracket body.
- the support member may further include an extension portion bent from the insertion portion, and the pickup shaft may include a through portion which the extension portion penetrates.
- the extension portion may include a first extension portion bent downward from the insertion portion, and a second extension portion bent from the first extension portion and penetrating the through portion.
- the stator core may include a coupling portion which is disposed in an outer wall of the stator core and to which the support member is coupled.
- the stator includes a stator coil.
- the stator core may include a core body, and a winding portion extending inward from the core body, the stator coil may be wound around the winding portion, and the coupling portion may be provided in the core body.
- the stator core may include a plurality of unit cores stacked on one another, and the coupling portion may include a coupling portion body extending downward from a lowest unit core of the plurality of unit cores, and an accommodating space which is provided in the coupling portion body and in which the support member is inserted.
- the core body may include a first core body to which the bracket is coupled, and a second core body extending from the first core body, and the coupling portion may be provided in the second core body.
- a diameter of the accommodating space may be equal to or smaller than three times a diameter of the support member.
- An embodiment of a compressor according to the present disclosure relates to a hermetic reciprocating compressor, however, the present disclosure is not limited to this.
- the compressor according to the present disclosure is used in various home appliances, such as a refrigerator, a water purifier, etc., however, the compressor 1 is not limited to being used in such home appliances.
- FIG. 1 is a schematic cross-sectional view of a compressor according to an embodiment of the present disclosure.
- a compressor 1 may include a case 10 forming the outer appearance.
- the case 10 may be made of a metal material.
- the case 10 may be manufactured by plastic working a steel sheet by a deep drawing method, etc. That is, the case 10 may be manufactured by welding two steel plate structures manufactured in the shape of a hemisphere, and a press method may be used to manufacture a steel plate sheet in the shape of a hemisphere having a predetermined thickness.
- the case 10 may include accommodating space 11 for accommodating components installed in the inside of the compressor 1 in such a way for the components to be spaced a predetermined distance from the inner wall of the case 10 in order to be prevented from contacting the case 10.
- the compressor 1 may include a frame 12 for fixing the components installed in the inside of the case 10.
- the compressor 1 may include compressing mechanism 20 installed above the frame 12, and electrically-driven mechanism 30 installed below the frame 12 for driving the compressing mechanism 20.
- the compressing mechanism 20 may include a cylinder 21 forming compressing space for a refrigerant and fixed on the frame 12, and a piston 22 moving back and forth in the inside of the cylinder 21 to compress the refrigerant.
- the electrically-driven mechanism 30 may include a stator 100 fixed on the frame 12, and a rotor 31 rotating in the inside of the stator 100.
- the cylinder 21 may be made of an aluminum material.
- the aluminum material may be aluminum or an aluminum alloy. Due to the aluminum material which is a nonmagnetic material, magnetic flux generated in the rotor 31 may be not transferred to the cylinder 21.
- the magnetic flux generated in the rotor 31 may be prevented from being transferred to the cylinder 21 to leak to the outside of the cylinder 21.
- the piston 22 may also be made of an aluminum material, like the cylinder 21. Accordingly, like the cylinder 21, magnetic flux generated in the rotor 31 may be prevented from being transferred to the piston 22 to leak to the outside of the piston 22.
- the piston 22 is made of the same material as the cylinder 21, the piston 22 may have the nearly same thermal expansion coefficient as the cylinder 21.
- the piston 22 Since the piston 22 has the nearly same thermal expansion coefficient as the cylinder 21, the piston 22 may be deformed by the nearly same amount as the cylinder 21 in the high-temperature inside environment of the case 10 when the compressor 1 is driven.
- the piston 22 when the piston 22 reciprocates in the inside of the cylinder 21, the piston 22 may be prevented from interfering with the cylinder 21.
- the rotor 31 may include a cavity 31a.
- the stator 100 may include a stator core 110 corresponding to a fixed portion when the electrically-driven mechanism 30 is driven, and a stator coil 130 (see FIG. 4 ) installed in the inside of the stator core 110.
- the stator core 110 may be made of a metal material, and may be in the shape of a cylinder. When a voltage is applied from a power supply (not shown), the stator coil 130 may generate an electromagnetic force to perform an electromagnetic interaction together with the stator core 110 and the rotor 31.
- the electrically-driven mechanism 30 may include an insulator 120 disposed between the stator core 110 and the stator coil 130.
- the insulator 120 may prevent the stator core 110 from directly contacting the stator coil 130.
- the insulator 120 may include an upper insulator 121 (see FIG. 4 ) disposed on the stator core 110, and a lower insulator 122 disposed below the stator core 110.
- the stator coil 130 may be wound together with the stator core 110, the upper insulator 121, and the lower insulator 122.
- stator core 110 When the stator coil 130 directly contacts the stator core 110, the stator core 110 may interfere with generation of an electromagnetic force from the stator coil 130.
- the insulator 120 may space the stator coil 130 from the stator core 110 by a predetermined distance.
- the rotor 31 may be rotatably installed in the inside of the stator core 110.
- the rotor 31 may include a magnet (not shown).
- the rotor 31 may rotate by an electromagnetic interaction between the stator core 110 and the stator coil 130, when a voltage is applied to the rotor 31.
- the compressor 1 may be disposed vertically to transfer a driving force of the electrically-driven mechanism 30 to the compressing mechanism 20, and include a rotation shaft 40 rotatably supported by a shaft support portion 13 of the frame 12.
- the rotation shaft 40 may be pressed in the cavity 31a of the rotor 31, and rotate together with the rotor 31.
- an eccentric portion 41 may be formed to be eccentric from the center axis of rotation of the rotor 31, and the eccentric portion 41 may be connected to the piston 22 by a connecting rod 23.
- a rotation motion of the rotation shaft 40 may be converted to a linear motion of the piston 22 by the connecting rod 23.
- the connecting rod 23 may be made of a sintered alloy material.
- a disk portion 42 may extend in a radial direction. Between the disk portion 42 and the shaft support portion 13, a trust bearing 43 (see FIG. 3 ) may be interposed to smoothly rotate the rotation shaft 40 and simultaneously support the axial-direction weight of the rotation shaft 40.
- oil for lubricating and cooling the individual components of the compressor 1 may be stored, and the oil may be raised through the rotation shaft 40 to be supplied to the individual components.
- the rotation shaft 40 may have a cavity 44 for raising oil stored in the case 10 through the inner circumferential surface.
- the pickup shaft 50 may be inserted into the cavity 44.
- the pickup shaft 50 may be supported by a support member 60. Accordingly, when the rotation shaft 40 rotates, the pickup shaft 50 may not rotate.
- the compressor 1 may include a bracket 200 coupled to the lower portion of the stator core 110. The bracket 200 may support the stator core 110.
- the support member 60 may be coupled to the bracket 200 or the stator core 110.
- the pickup shaft 50 may be inserted into the cavity 44, and supported on the bracket 200 or the stator core 110 by the support member 60.
- a coupling structure of the support member 60 with the bracket 200 or the stator core 100 will be described in detail, later.
- FIG. 2 is an exploded perspective view showing a coupling structure of a rotation shaft and a pickup shaft in a compressor according to an embodiment of the present disclosure
- FIG. 3 shows a structure for raising oil in a compressor according to an embodiment of the present disclosure.
- a spiral wing 51 may be formed in the outer circumferential surface of the pickup shaft 50 to raise oil stored in the case 10 together with the inner circumferential surface of the rotation shaft 40.
- oil stored in the case 10 may rotate in the rotation direction of the rotation shaft 40 by viscosity with the rotation shaft 40 to raise along the spiral wing 51 of the pickup shaft 50.
- A represents the rotation direction of the rotation shaft 40, and means that the rotation shaft 40 rotates in a clockwise direction as seen from above the rotation shaft 40.
- the rotation direction of the rotation shaft 40 will be described as the rotation direction of the rotation shaft 40 when seen from above the rotation shaft 40.
- B represents a direction in which oil rises.
- the oil stored in the case 10 may rotate in the clockwise direction by viscosity with the rotation shaft 40.
- the oil rotating in the clockwise direction may rise along the spiral wing 51 formed in the outer circumferential surface of the pickup shaft 50. That is, a centrifugal force generated by a rotation of the rotation shaft 40 may be converted to a lifting force by the spiral wing 51 to thus raise the oil.
- the pickup shaft 50 and the spiral wing 51 may not rotate by the support member 60 although the rotation shaft 40 rotates, as described above.
- the compressor 1 may raise oil through the inner circumferential surface of the rotation shaft 40.
- the oil may be prevented from being raised by surface pressure (or viscosity with the shaft support portion 13) of the shaft support portion 13, and accordingly, it may be necessary to maintain predetermined RPM of the rotation shaft 40 in order to raise the oil.
- the compressor 1 may raise oil even at low RPM since rising oil is not subject to surface pressure from the shaft support portion 13.
- the compressor 1 since the compressor 1 can raise oil with a small centrifugal force, it may be possible to reduce the diameter of the rotation shaft 40.
- the pickup shaft 50 may include a through portion 52 which protrudes downward and to which the support member 60 is coupled. In the through portion 52, a through hole 53 which the support member 60 penetrates may be formed.
- the support member 60 may be a wire.
- the support member 60 may be a wire bent at a plurality of positions.
- the support member 60 may include an extension portion 61 penetrating the through hole 53 of the pickup shaft 50, and an insertion portion 62 coupled to the bracket 200 (see FIG. 1 ) or the stator core 110 (see FIG. 1 ).
- the extension portion 61 may include a first extension portion 61a bent downward from the insertion portion 61, and a second extension portion 61b bent from the first extension portion 61a and penetrating the through portion 52.
- the pickup shaft 50 may be first coupled with the support member 60, and the support member 60 may be coupled with the bracket 200 or the stator core 110.
- the extension portion 61 of the support member 60 may be inserted into the through hole 53 of the pickup shaft 50, and then, the insertion portion 62 of the support member 60 may be coupled to the bracket 200 or the stator core 110.
- the support member 60 may be made of a material having elasticity, such as a flat spring. Accordingly, when the support member 60 is coupled to the bracket 200 or the stator core 110, the support member 60 may be more or less widened.
- the support member 60 may be firmly coupled to the bracket 200 or the stator core 110 by the restoring force.
- FIG. 4 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to an embodiment of the present disclosure
- FIGS. 5 and 6 show a bracket in a compressor according to an embodiment of the present disclosure.
- the bracket 200 may be disposed adjacent to the insulator 120.
- the bracket 200 may be disposed adjacent to the lower insulator 122.
- the bracket 200 may be spaced from the lower insulator 122.
- the bracket 200 may be spaced outward from the lower insulator 122.
- the bracket 200 may be coupled to the frame 12 with the stator core 110 in between.
- the bracket 200 may be coupled to the frame 12 by a coupling member (not shown) penetrating the stator core 110.
- Brackets 200 may be provided.
- the compressor 1 according to an embodiment of the present disclosure may include two brackets 200.
- the bracket 200 may be configured in various forms, as long as it can couple and support the components installed in the inside of the case 10.
- the bracket 200 may include a bracket body 210, and a first coupling hole 211 formed in the bracket body 210 and coupled to the frame 12.
- a plurality of first coupling holes 211 may be formed.
- the bracket 200 according to an embodiment of the present disclosure may include two first coupling holes 211, although not limited thereto.
- the bracket 200 may include a bumper portion 212 to which a bumper member 220 for reducing vibrations of the compressor 1 is coupled.
- the bumper portion 212 may extend downward from the bracket body 210.
- the bumper member 220 may be disposed below the bracket body 210.
- a plurality of bumper portions 212 may be provided.
- the bracket 200 according to an embodiment of the present disclosure may include two bumper portions 212, although not limited thereto.
- a plurality of bumper members 220 may be provided to correspond to the number of the bumper portions 212.
- the bracket 200 may include a coupling portion 300 which is formed in the bracket body 210 and to which the support member 60 is coupled.
- the bracket 200 may be made of a material having higher strength than a material forming the insulator 120.
- the bracket 200 may be made of steel.
- the compressor 1 may couple the support member 60 to the bracket 200, thereby preventing breakage and abrasion of the coupling portion 300, while further strengthening coupling of the support member 60.
- the coupling portion 300 may be disposed in the center of the bracket body 210.
- the coupling portion 300 may include a coupling portion body 310 extending downward from the bracket body 210, and accommodating space 320 which is formed in the coupling portion body 310 and in which the support member 60 is inserted.
- the coupling portion body 310 is curved downward from the bracket body 210 to form the accommodating space 320, the coupling portion 300 may form a nearly "U"-shaped groove.
- the insertion portion 62 (see FIG. 3 ) inserted in the accommodating space 320 may be positioned between the coupling portion body 310 and the stator core 110.
- the area of the accommodating space 320 may be larger than the cross-section area of the support member 60, and may be equal to or smaller than three times the cross-section area of the support member 60, although not limited thereto.
- the coupling portion 300 may be formed by applying a press method on the bracket body 210.
- FIGS. 7 and 8 show a bracket in a compressor according to another embodiment of the present disclosure.
- a bracket 201 according to another embodiment of the present disclosure may have the substantially same structure as the bracket 200 according to the embodiment of the present disclosure, except for the structure of a coupling portion (400 in FIG. 7 ).
- the bracket 201 may include a bracket body 210, and a first coupling hole 211 formed in the bracket body 210 to couple the bracket 201 to the frame 12 (see FIG. 4 ).
- the bracket 201 may include the bumper portion 212 to which the bumper member 220 (see FIG. 4 ) for reducing vibrations of the compressor 1 is coupled.
- the bumper portions 212 may be provided in plural numbers corresponding to the number of the buffer members 220. Also.
- the bracket 201 may include a coupling portion 400 which is formed in the bracket body 210 and to which the support member 60 (see FIG. 4 ) is coupled.
- the bracket 201 may be made of a material having higher strength than the material forming the insulator 120 (see FIG. 4 ).
- the bracket 201 may be made of steel.
- the coupling portion 400 may be disposed in the center of the bracket body 210.
- the coupling portion 400 may include a coupling portion body 410 extending downward from the bracket body 210, and accommodating space 420 which is formed in the coupling portion body 410 and in which the support member 60 is inserted.
- the coupling portion 400 may include the coupling portion body 410 curved downward from the bracket body 210, and the accommodating space 420 forming a hole in the coupling portion body 410.
- the insertion portion 62 (see FIG. 3 ) inserted in the accommodating space 420 may be spaced from the stator core 110 (see FIG. 4 ).
- the insertion portion 62 (see FIG. 3 ) inserted in the accommodating space 420 may be spaced from the bracket body 210.
- the diameter of the accommodating space 420 may be larger than the diameter of the support member 60, and may be equal to or smaller than three times the diameter of the support member 60, although not limited thereto.
- FIG. 9 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to another embodiment of the present disclosure.
- FIG. 10 shows a coupling portion provided in a stator core in the compressor shown in FIG. 9 .
- a bracket 202 may be disposed adjacent to the lower insulator 122.
- the bracket 202 may be spaced from the lower insulator 122.
- the bracket 202 may be spaced outward from the lower insulator 122.
- the bracket 202 may be coupled to the frame 12 with the stator core 110 in between.
- the bracket 202 may be coupled to the frame 12 by a coupling member (not shown) penetrating the stator core 110.
- a plurality of brackets 202 may be provided.
- the bracket 202 according to the other embodiment of the present disclosure may be configured as two pieces, although not limited thereto.
- the bracket 202 may be configured in various forms, as long as it can couple and support the components installed in the inside of the case 10 (see FIG. 1 ).
- the bracket 202 may include a bumper member 220 for reducing vibrations of the compressor 1.
- a plurality of bumper members 220 may be provided.
- Two bumper members 220 may be included in each of the brackets 202 according to the other embodiment of the present disclosure, although not limited thereto.
- the stator core 110 may include a coupling portion 500 which is formed in the stator core 110 and to which the support member 60 is coupled.
- the coupling portion 500 may be disposed in the outer wall of the stator core 110.
- the coupling portion 500 may be disposed at one edge of the stator core 110.
- the stator core 110 may be made of a material having higher strength than the material forming the insulator 120.
- the stator core 110 may be an electromagnetic steel sheet.
- the stator core 110 may include a core body 111, and a winding portion 112 extending inward from the core body 111, wherein the stator coil 130 (see FIG. 4 ) is wound around the winding portion 112.
- the core body 111 may be in the shape of a circle, and a plurality of winding portions 112 may be provided.
- the coupling portion 500 may be formed in the core body 111.
- the core body 111 may include a first core body 113 to which the bracket 202 is coupled, and a second core body 114 extending from the first core body 113.
- the coupling portion 500 may be formed in the first core body 113, although not limited thereto.
- the core body 111 may include a second coupling hole 115 which a coupling member (not shown) to be coupled to the frame 12 (see FIG. 4 ) penetrates.
- a plurality of second coupling holes 115 may be provided.
- the core body 111 according to the other embodiment of the present disclosure may include four second coupling holes 115, although not limited thereto.
- the stator core 110 may include a plurality of unit cores 110a that are stacked on one another. At least one part of the plurality of unit cores 110a may include a unit coupling portion 500a. Since the plurality of unit cores 110a are stacked to form the stator core 110, a plurality of unit coupling portions 500a may form the coupling portion 500.
- the plurality of unit cores 110a including the unit coupling portion 500a forming the coupling portion 500 may be disposed below a plurality of different unit cores 110a, although not limited thereto.
- the coupling portion 500 may include a groove in which the support member 60 is inserted.
- the insertion portion 62 inserted in the coupling portion 500 may be positioned on the bracket 202.
- the bracket 202 may cover an open side of the coupling portion 500.
- the area of the coupling portion 500 may be larger than the cross-section area of the support member 60, and may be equal to or smaller than three times the cross-section area of the support member 60, although not limited thereto.
- FIG. 11 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to another embodiment of the present disclosure.
- FIG. 12 shows a coupling portion provided in a unit core in the compressor shown in FIG. 11 .
- the bracket 202 may be disposed adjacent to the lower insulator 122.
- the bracket 202 may be spaced from the lower insulator 122.
- the bracket 202 may be spaced outward from the lower insulator 122.
- the bracket 202 may be coupled with the frame 12 (see FIG. 4 ) with the stator core 110 in between.
- the bracket 202 may be coupled to the frame 12 by a coupling member (not shown) penetrating the stator core 110.
- a plurality of brackets 202 may be provided.
- the bracket 202 according to the other embodiment of the present disclosure may be configured as two pieces, although not limited thereto.
- the bracket 202 may be configured in various forms, as long as it can couple and support the components installed in the inside of the case 10 (see FIG. 1 ).
- the bracket 202 may include the bumper member 220 for reducing vibrations of the compressor 1.
- a plurality of bumper members 220 may be provided.
- the bracket 202 according to the other embodiment of the present disclosure may include two bumper members 220 for each bracket 202, although not limited thereto.
- the stator core 110 may include a coupling portion 600 which is formed in the stator core 110 and to which the support member 60 is coupled.
- the coupling portion 600 may be formed in the outer wall of the stator core 110.
- the stator core 110 may be made of a material having higher strength than the material forming the insulator 120.
- the stator core 110 may be an electromagnetic steel sheet.
- the stator core 110 may include a core body 111, and a winding portion 112 extending inward from the core body 111, wherein the stator coil 130 (see FIG. 4 ) is wound around the winding portion 112.
- the core body 111 may be in the shape of a circle, and a plurality of winding portions 112 may be provided.
- the coupling portion 600 may be formed in the core body 111.
- the core body 111 may include a first core body 113 to which the bracket 202 is coupled, and a second core body 114 extending from the first core body 113.
- the coupling portion 600 may be formed in the second core body 114, although not limited thereto.
- the core body 111 may include the second coupling hole 115 which a coupling member (not shown) to be coupled to the frame 12 penetrates.
- the core body 111 may include a second coupling hole 115 which a coupling member (not shown) to be coupled to the frame 12 (see FIG. 4 ) penetrates.
- a plurality of second coupling holes 115 may be provided.
- the core body 111 according to the other embodiment of the present disclosure may include four second coupling holes 115, although not limited thereto.
- the stator core 110 may include a plurality of unit cores 110a that are stacked on one another.
- the coupling portion 600 may be formed in the lowest unit core 110a of the plurality of unit cores 110a.
- the coupling portion 600 may include a coupling portion body 610 extending downward from the lowest unit core 110a of the plurality of unit cores 110a, and accommodating space 620 which is formed in the coupling portion body 610 and in which the support member 60 is inserted.
- the coupling portion body 610 is curved downward from the lowest unit core 110a of the plurality of unit cores 110a to form the accommodating space 620, the coupling portion 600 may form a nearly "U"-shaped groove.
- Another unit core 110a neighboring the lowest unit core 110a of the plurality of unit cores 110a may be stacked on the lowest unit core 110a to cover one side of the accommodating space 620.
- the accommodating space 620 may open in both front and rear directions in which the insertion portion 62 (see FIG. 3 ) is inserted. Accordingly, the coupling portion 600 may form a hole, although not limited thereto.
- the insertion portion 62 inserted in the accommodating space 620 may be positioned between the plurality of unit cores 110a.
- the area of the accommodating space 620 may be larger than the cross-section area of the support member 60, and may be equal to or smaller than three times the cross-section area of the support member 60, although not limited thereto.
- oil stored in the case rises along the inner circumferential surface of the rotation shaft, the oil may be efficiently supplied to the individual components even when the rotation shaft rotates at low RPM.
- the coupling portion to which the support member for supporting the pickup shaft is coupled is disposed at the bracket or the stator core having high strength, it may be possible to prevent breakage or abrasion of the coupling portion.
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Description
- The present disclosure relates to a compressor having an improved oil supply structure.
- In general, a compressor is a machine which receives power from a power generator, such as a motor or a turbine, and compresses air, a refrigerant, or other various operating gas to increase pressure. The compressor is widely used in home appliances, such as a refrigerator, an air conditioner, etc., or industrial machinery.
- Compressors are classified into a reciprocating compressor, a rotary compressor, and a scroll compressor according to compressing methods and sealing structures.
- The reciprocating compressor has a structure that forms compressing space in which operating gas is inhaled or discharged between a piston and a cylinder to compress a refrigerant when the piston performs a linear reciprocating motion in the inside of the cylinder.
- A hermetic reciprocating compressor includes compressing mechanism for compressing a refrigerant through a reciprocating motion of a piston and electrically-driven mechanism for driving the compressing mechanism, wherein the compressing mechanism and the electrically-driven mechanism are installed in the inside of a single case.
- The hermetic reciprocating compressor includes a shaft for transferring a driving force of the electrically-driven mechanism to the compressing mechanism. In the lower portion of the case, oil for lubricating and cooling the components of the individual mechanisms is stored, and the shaft includes an oil supply structure for raising the oil to supply it to the components.
- There are various oil supply structures, and generally, a centrifugal pump structure that supplies oil upward by the centrifugal force of a shaft and a viscous liquid pump structure that supplies oil upward by the viscosity of oil are used.
- Particularly, the viscous liquid pump structure includes a rotation shaft having a cavity through which oil moves, a pickup shaft accommodated in the cavity of the rotation shaft, and a support member for supporting the pickup shaft.
-
WO00/01949 US2002/0170779 relate to oil supply systems for hermetic compressors having a support bracket coupled to the lower portion of a stator and a sucking member. - It is an aspect of the present disclosure to provide a compressor including an improved oil supply structure for efficiently raising oil stored in the lower portion of a case even when a rotation shaft rotates at low revolutions per minute (RPM).
- It is another aspect of the present disclosure to provide a compressor including an improved bracket or an improved stator core to which a support member for supporting a pickup shaft is coupled.
- Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
- In accordance with the present invention, there is provided a compressor including: a case; a stator, accommodated in the case, and including a stator core; a rotor rotatably disposed in an inside of the stator core; a bracket coupled to a lower portion of the stator core; a rotation shaft configured to rotate together with the rotor, and having a cavity for raising oil stored in the case; a pickup shaft accommodated in the cavity; and a support member connected to the pickup shaft to support the pickup shaft, and coupled to the bracket or the stator core.
- The stator includes an insulator disposed below the stator core. The bracket may be made of a material having higher strength than a material of the insulator.
- The bracket may be made of steel.
- The bracket may include a bracket body, and a coupling portion which is provided in the bracket body and to which the support member is coupled.
- The coupling portion may include a coupling portion body extending downward from the bracket body, and an accommodating space which is provided in the coupling portion body and in which the support member is inserted.
- The support member may include an insertion portion inserted in the accommodating space.
- The insertion portion inserted in the accommodating space may be positioned between the coupling portion body and the stator core.
- The insertion portion inserted in the accommodating space may be spaced from the bracket body.
- The support member may further include an extension portion bent from the insertion portion, and the pickup shaft may include a through portion which the extension portion penetrates.
- The extension portion may include a first extension portion bent downward from the insertion portion, and a second extension portion bent from the first extension portion and penetrating the through portion.
- The stator core may include a coupling portion which is disposed in an outer wall of the stator core and to which the support member is coupled.
- The stator includes a stator coil. The stator core may include a core body, and a winding portion extending inward from the core body, the stator coil may be wound around the winding portion, and the coupling portion may be provided in the core body.
- The stator core may include a plurality of unit cores stacked on one another, and the coupling portion may include a coupling portion body extending downward from a lowest unit core of the plurality of unit cores, and an accommodating space which is provided in the coupling portion body and in which the support member is inserted.
- The core body may include a first core body to which the bracket is coupled, and a second core body extending from the first core body, and the coupling portion may be provided in the second core body.
- A diameter of the accommodating space may be equal to or smaller than three times a diameter of the support member.
- These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
-
FIG. 1 is a schematic cross-sectional view of a compressor according to an embodiment of the present disclosure; -
FIG. 2 is an exploded perspective view showing a coupling structure of a rotation shaft and a pickup shaft in a compressor according to an embodiment of the present disclosure; -
FIG. 3 shows a structure for raising oil in a compressor according to an embodiment of the present disclosure; -
FIG. 4 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to an embodiment of the present disclosure; -
FIGS. 5 and 6 show a bracket in a compressor according to an embodiment of the present disclosure; -
FIGS. 7 and8 show a bracket in a compressor according to another embodiment of the present disclosure; -
FIG. 9 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to another embodiment of the present disclosure; -
FIG. 10 shows a coupling portion provided in a stator core in the compressor shown inFIG. 9 ; -
FIG. 11 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to another embodiment of the present disclosure; and -
FIG. 12 shows a coupling portion provided in a unit core in the compressor shown inFIG. 11 . - Configurations illustrated in the embodiments and the drawings described in the present specification are only the preferred embodiments of the present disclosure, and thus it is to be understood that various modified examples, which may replace the embodiments and the drawings described in the present specification, are possible when filing the present application.
- Also, like reference numerals or symbols denoted in the drawings of the present specification represent members or components that perform the substantially same functions. Also, the terms used in the present specification are used to describe the embodiments of the present disclosure, not for the purpose of limiting the disclosure.
- It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It will be understood that when the terms "includes," "comprises," "including," and/or "comprising," when used in this specification, specify the presence of stated features, figures, steps, components, or combination thereof, but do not preclude the presence or addition of one or more other features, figures, steps, components, members, or combinations thereof.
- It will be understood that, although the terms "first", "second", etc., may be used herein to describe various elements, these elements should not be limited by these terms. The above terms are used only to distinguish one component from another. For example, a first component discussed below could be termed a second component, and similarly, a second component may be termed a first component without departing from the teachings of this disclosure.
- As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
- In the following description, the terms "front", "rear", "upper", and "lower" are defined based on the drawings, and the shapes and positions of the corresponding components are not limited by the terms.
- Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. An embodiment of a compressor according to the present disclosure relates to a hermetic reciprocating compressor, however, the present disclosure is not limited to this.
- Also, the compressor according to the present disclosure is used in various home appliances, such as a refrigerator, a water purifier, etc., however, the
compressor 1 is not limited to being used in such home appliances. -
FIG. 1 is a schematic cross-sectional view of a compressor according to an embodiment of the present disclosure. As shown inFIG. 1 , acompressor 1 may include acase 10 forming the outer appearance. Thecase 10 may be made of a metal material. - Generally, the
case 10 may be manufactured by plastic working a steel sheet by a deep drawing method, etc. That is, thecase 10 may be manufactured by welding two steel plate structures manufactured in the shape of a hemisphere, and a press method may be used to manufacture a steel plate sheet in the shape of a hemisphere having a predetermined thickness. - The
case 10 may include accommodatingspace 11 for accommodating components installed in the inside of thecompressor 1 in such a way for the components to be spaced a predetermined distance from the inner wall of thecase 10 in order to be prevented from contacting thecase 10. - The
compressor 1 may include aframe 12 for fixing the components installed in the inside of thecase 10. Thecompressor 1 may include compressingmechanism 20 installed above theframe 12, and electrically-drivenmechanism 30 installed below theframe 12 for driving thecompressing mechanism 20. - The
compressing mechanism 20 may include acylinder 21 forming compressing space for a refrigerant and fixed on theframe 12, and apiston 22 moving back and forth in the inside of thecylinder 21 to compress the refrigerant. - The electrically-driven
mechanism 30 may include astator 100 fixed on theframe 12, and arotor 31 rotating in the inside of thestator 100. - The
cylinder 21 may be made of an aluminum material. The aluminum material may be aluminum or an aluminum alloy. Due to the aluminum material which is a nonmagnetic material, magnetic flux generated in therotor 31 may be not transferred to thecylinder 21. - Accordingly, the magnetic flux generated in the
rotor 31 may be prevented from being transferred to thecylinder 21 to leak to the outside of thecylinder 21. - The
piston 22 may also be made of an aluminum material, like thecylinder 21. Accordingly, like thecylinder 21, magnetic flux generated in therotor 31 may be prevented from being transferred to thepiston 22 to leak to the outside of thepiston 22. - Since the
piston 22 is made of the same material as thecylinder 21, thepiston 22 may have the nearly same thermal expansion coefficient as thecylinder 21. - Since the
piston 22 has the nearly same thermal expansion coefficient as thecylinder 21, thepiston 22 may be deformed by the nearly same amount as thecylinder 21 in the high-temperature inside environment of thecase 10 when thecompressor 1 is driven. - Accordingly, when the
piston 22 reciprocates in the inside of thecylinder 21, thepiston 22 may be prevented from interfering with thecylinder 21. - The
rotor 31 may include acavity 31a. Thestator 100 may include astator core 110 corresponding to a fixed portion when the electrically-drivenmechanism 30 is driven, and a stator coil 130 (seeFIG. 4 ) installed in the inside of thestator core 110. - The
stator core 110 may be made of a metal material, and may be in the shape of a cylinder. When a voltage is applied from a power supply (not shown), thestator coil 130 may generate an electromagnetic force to perform an electromagnetic interaction together with thestator core 110 and therotor 31. - The electrically-driven
mechanism 30 may include aninsulator 120 disposed between thestator core 110 and thestator coil 130. Theinsulator 120 may prevent thestator core 110 from directly contacting thestator coil 130. - The
insulator 120 may include an upper insulator 121 (seeFIG. 4 ) disposed on thestator core 110, and alower insulator 122 disposed below thestator core 110. - The
stator coil 130 may be wound together with thestator core 110, theupper insulator 121, and thelower insulator 122. - When the
stator coil 130 directly contacts thestator core 110, thestator core 110 may interfere with generation of an electromagnetic force from thestator coil 130. Theinsulator 120 may space thestator coil 130 from thestator core 110 by a predetermined distance. - The
rotor 31 may be rotatably installed in the inside of thestator core 110. Therotor 31 may include a magnet (not shown). Therotor 31 may rotate by an electromagnetic interaction between thestator core 110 and thestator coil 130, when a voltage is applied to therotor 31. - The
compressor 1 may be disposed vertically to transfer a driving force of the electrically-drivenmechanism 30 to thecompressing mechanism 20, and include arotation shaft 40 rotatably supported by ashaft support portion 13 of theframe 12. Therotation shaft 40 may be pressed in thecavity 31a of therotor 31, and rotate together with therotor 31. - On the
rotation shaft 40, aneccentric portion 41 may be formed to be eccentric from the center axis of rotation of therotor 31, and theeccentric portion 41 may be connected to thepiston 22 by a connectingrod 23. - Accordingly, a rotation motion of the
rotation shaft 40 may be converted to a linear motion of thepiston 22 by the connectingrod 23. The connectingrod 23 may be made of a sintered alloy material. - Below the
eccentric portion 41, adisk portion 42 may extend in a radial direction. Between thedisk portion 42 and theshaft support portion 13, a trust bearing 43 (seeFIG. 3 ) may be interposed to smoothly rotate therotation shaft 40 and simultaneously support the axial-direction weight of therotation shaft 40. - In the lower portion of the
case 10, oil for lubricating and cooling the individual components of thecompressor 1 may be stored, and the oil may be raised through therotation shaft 40 to be supplied to the individual components. - The
rotation shaft 40 may have acavity 44 for raising oil stored in thecase 10 through the inner circumferential surface. Thepickup shaft 50 may be inserted into thecavity 44. - The
pickup shaft 50 may be supported by asupport member 60. Accordingly, when therotation shaft 40 rotates, thepickup shaft 50 may not rotate. Thecompressor 1 may include abracket 200 coupled to the lower portion of thestator core 110. Thebracket 200 may support thestator core 110. - The
support member 60 according to an embodiment of the present disclosure may be coupled to thebracket 200 or thestator core 110. Thepickup shaft 50 may be inserted into thecavity 44, and supported on thebracket 200 or thestator core 110 by thesupport member 60. - A coupling structure of the
support member 60 with thebracket 200 or thestator core 100 will be described in detail, later. -
FIG. 2 is an exploded perspective view showing a coupling structure of a rotation shaft and a pickup shaft in a compressor according to an embodiment of the present disclosure, andFIG. 3 shows a structure for raising oil in a compressor according to an embodiment of the present disclosure. - Hereinafter, a structure for raising oil will be described in detail with reference to the drawings.
- As shown in
FIGS. 2 and3 , aspiral wing 51 may be formed in the outer circumferential surface of thepickup shaft 50 to raise oil stored in thecase 10 together with the inner circumferential surface of therotation shaft 40. - Accordingly, when the
rotation shaft 40 rotates, oil stored in thecase 10 may rotate in the rotation direction of therotation shaft 40 by viscosity with therotation shaft 40 to raise along thespiral wing 51 of thepickup shaft 50. - In
FIG. 3 , A represents the rotation direction of therotation shaft 40, and means that therotation shaft 40 rotates in a clockwise direction as seen from above therotation shaft 40. Hereinafter, the rotation direction of therotation shaft 40 will be described as the rotation direction of therotation shaft 40 when seen from above therotation shaft 40. InFIG. 3 , B represents a direction in which oil rises. - When the
rotation shaft 40 rotates in the clockwise direction, the oil stored in thecase 10 may rotate in the clockwise direction by viscosity with therotation shaft 40. The oil rotating in the clockwise direction may rise along thespiral wing 51 formed in the outer circumferential surface of thepickup shaft 50. That is, a centrifugal force generated by a rotation of therotation shaft 40 may be converted to a lifting force by thespiral wing 51 to thus raise the oil. - At this time, the
pickup shaft 50 and thespiral wing 51 may not rotate by thesupport member 60 although therotation shaft 40 rotates, as described above. - As such, the
compressor 1 according to an embodiment of the present disclosure may raise oil through the inner circumferential surface of therotation shaft 40. - In the case of a structure of raising oil through the outer circumferential surface of the
rotation shaft 40, the oil may be prevented from being raised by surface pressure (or viscosity with the shaft support portion 13) of theshaft support portion 13, and accordingly, it may be necessary to maintain predetermined RPM of therotation shaft 40 in order to raise the oil. - The
compressor 1 according to an embodiment of the present disclosure may raise oil even at low RPM since rising oil is not subject to surface pressure from theshaft support portion 13. - Also, for the same reason, since the
compressor 1 can raise oil with a small centrifugal force, it may be possible to reduce the diameter of therotation shaft 40. - The
pickup shaft 50 may include a throughportion 52 which protrudes downward and to which thesupport member 60 is coupled. In the throughportion 52, a throughhole 53 which thesupport member 60 penetrates may be formed. - The
support member 60 may be a wire. Thesupport member 60 may be a wire bent at a plurality of positions. Thesupport member 60 may include anextension portion 61 penetrating the throughhole 53 of thepickup shaft 50, and an insertion portion 62 coupled to the bracket 200 (seeFIG. 1 ) or the stator core 110 (seeFIG. 1 ). - The
extension portion 61 may include afirst extension portion 61a bent downward from theinsertion portion 61, and asecond extension portion 61b bent from thefirst extension portion 61a and penetrating the throughportion 52. - The
pickup shaft 50 may be first coupled with thesupport member 60, and thesupport member 60 may be coupled with thebracket 200 or thestator core 110. Theextension portion 61 of thesupport member 60 may be inserted into the throughhole 53 of thepickup shaft 50, and then, the insertion portion 62 of thesupport member 60 may be coupled to thebracket 200 or thestator core 110. - At this time, the
support member 60 may be made of a material having elasticity, such as a flat spring. Accordingly, when thesupport member 60 is coupled to thebracket 200 or thestator core 110, thesupport member 60 may be more or less widened. - After the
support member 60 is coupled to thebracket 200 or thestator core 110, thesupport member 60 may be firmly coupled to thebracket 200 or thestator core 110 by the restoring force. - Hereinafter, a structure in which the
support member 60 is coupled to thebracket 200 or thestator core 100 will be described in detail. -
FIG. 4 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to an embodiment of the present disclosure, andFIGS. 5 and 6 show a bracket in a compressor according to an embodiment of the present disclosure. - As shown in
FIGS. 4 to 6 , thebracket 200 may be disposed adjacent to theinsulator 120. Thebracket 200 may be disposed adjacent to thelower insulator 122. Thebracket 200 may be spaced from thelower insulator 122. Thebracket 200 may be spaced outward from thelower insulator 122. - The
bracket 200 may be coupled to theframe 12 with thestator core 110 in between. Thebracket 200 may be coupled to theframe 12 by a coupling member (not shown) penetrating thestator core 110. - A plurality of
brackets 200 may be provided. Thecompressor 1 according to an embodiment of the present disclosure may include twobrackets 200. However, thebracket 200 may be configured in various forms, as long as it can couple and support the components installed in the inside of thecase 10. - The
bracket 200 may include abracket body 210, and afirst coupling hole 211 formed in thebracket body 210 and coupled to theframe 12. - A plurality of first coupling holes 211 may be formed. The
bracket 200 according to an embodiment of the present disclosure may include two first coupling holes 211, although not limited thereto. - The
bracket 200 may include abumper portion 212 to which abumper member 220 for reducing vibrations of thecompressor 1 is coupled. Thebumper portion 212 may extend downward from thebracket body 210. - The
bumper member 220 may be disposed below thebracket body 210. - A plurality of
bumper portions 212 may be provided. Thebracket 200 according to an embodiment of the present disclosure may include twobumper portions 212, although not limited thereto. - Also, a plurality of
bumper members 220 may be provided to correspond to the number of thebumper portions 212. - The
bracket 200 may include acoupling portion 300 which is formed in thebracket body 210 and to which thesupport member 60 is coupled. - The
bracket 200 may be made of a material having higher strength than a material forming theinsulator 120. For example, thebracket 200 may be made of steel. - Accordingly, compared with a case of coupling the
support member 60 for supporting thepickup shaft 50 to theinsulator 120, thecompressor 1 according to an embodiment of the present disclosure may couple thesupport member 60 to thebracket 200, thereby preventing breakage and abrasion of thecoupling portion 300, while further strengthening coupling of thesupport member 60. - The
coupling portion 300 may be disposed in the center of thebracket body 210. - The
coupling portion 300 may include acoupling portion body 310 extending downward from thebracket body 210, andaccommodating space 320 which is formed in thecoupling portion body 310 and in which thesupport member 60 is inserted. - Since the
coupling portion body 310 is curved downward from thebracket body 210 to form theaccommodating space 320, thecoupling portion 300 may form a nearly "U"-shaped groove. - The insertion portion 62 (see
FIG. 3 ) inserted in theaccommodating space 320 may be positioned between thecoupling portion body 310 and thestator core 110. - The area of the
accommodating space 320 may be larger than the cross-section area of thesupport member 60, and may be equal to or smaller than three times the cross-section area of thesupport member 60, although not limited thereto. - The
coupling portion 300 may be formed by applying a press method on thebracket body 210. -
FIGS. 7 and8 show a bracket in a compressor according to another embodiment of the present disclosure. Abracket 201 according to another embodiment of the present disclosure may have the substantially same structure as thebracket 200 according to the embodiment of the present disclosure, except for the structure of a coupling portion (400 inFIG. 7 ). - As shown in
FIGS. 7 and8 , thebracket 201 may include abracket body 210, and afirst coupling hole 211 formed in thebracket body 210 to couple thebracket 201 to the frame 12 (seeFIG. 4 ). - The
bracket 201 may include thebumper portion 212 to which the bumper member 220 (seeFIG. 4 ) for reducing vibrations of thecompressor 1 is coupled. Thebumper portions 212 may be provided in plural numbers corresponding to the number of thebuffer members 220. Also. - The
bracket 201 may include acoupling portion 400 which is formed in thebracket body 210 and to which the support member 60 (seeFIG. 4 ) is coupled. - The
bracket 201 may be made of a material having higher strength than the material forming the insulator 120 (seeFIG. 4 ). For example, thebracket 201 may be made of steel. - The
coupling portion 400 may be disposed in the center of thebracket body 210. - The
coupling portion 400 may include acoupling portion body 410 extending downward from thebracket body 210, andaccommodating space 420 which is formed in thecoupling portion body 410 and in which thesupport member 60 is inserted. - The
coupling portion 400 may include thecoupling portion body 410 curved downward from thebracket body 210, and theaccommodating space 420 forming a hole in thecoupling portion body 410. - The insertion portion 62 (see
FIG. 3 ) inserted in theaccommodating space 420 may be spaced from the stator core 110 (seeFIG. 4 ). The insertion portion 62 (seeFIG. 3 ) inserted in theaccommodating space 420 may be spaced from thebracket body 210. - The diameter of the
accommodating space 420 may be larger than the diameter of thesupport member 60, and may be equal to or smaller than three times the diameter of thesupport member 60, although not limited thereto. -
FIG. 9 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to another embodiment of the present disclosure.FIG. 10 shows a coupling portion provided in a stator core in the compressor shown inFIG. 9 . - As shown in
FIGS. 9 and10 , abracket 202 according to another embodiment of the present disclosure may be disposed adjacent to thelower insulator 122. Thebracket 202 may be spaced from thelower insulator 122. Thebracket 202 may be spaced outward from thelower insulator 122. - The
bracket 202 may be coupled to theframe 12 with thestator core 110 in between. Thebracket 202 may be coupled to theframe 12 by a coupling member (not shown) penetrating thestator core 110. - A plurality of
brackets 202 may be provided. Thebracket 202 according to the other embodiment of the present disclosure may be configured as two pieces, although not limited thereto. However, thebracket 202 may be configured in various forms, as long as it can couple and support the components installed in the inside of the case 10 (seeFIG. 1 ). - The
bracket 202 may include abumper member 220 for reducing vibrations of thecompressor 1. A plurality ofbumper members 220 may be provided. Twobumper members 220 may be included in each of thebrackets 202 according to the other embodiment of the present disclosure, although not limited thereto. - The
stator core 110 may include acoupling portion 500 which is formed in thestator core 110 and to which thesupport member 60 is coupled. Thecoupling portion 500 may be disposed in the outer wall of thestator core 110. - The
coupling portion 500 may be disposed at one edge of thestator core 110. - The
stator core 110 may be made of a material having higher strength than the material forming theinsulator 120. For example, thestator core 110 may be an electromagnetic steel sheet. - Accordingly, compared with the case of coupling the
support member 60 for supporting thepickup shaft 50 to theinsulator 120, by coupling thesupport member 60 to thestator core 110, it may be possible to prevent breakage and abrasion of thecoupling portion 500, while further strengthening coupling of thesupport member 60. - The
stator core 110 may include acore body 111, and a windingportion 112 extending inward from thecore body 111, wherein the stator coil 130 (seeFIG. 4 ) is wound around the windingportion 112. - The
core body 111 may be in the shape of a circle, and a plurality of windingportions 112 may be provided. Thecoupling portion 500 may be formed in thecore body 111. - The
core body 111 may include afirst core body 113 to which thebracket 202 is coupled, and asecond core body 114 extending from thefirst core body 113. - The
coupling portion 500 may be formed in thefirst core body 113, although not limited thereto. - The
core body 111 may include asecond coupling hole 115 which a coupling member (not shown) to be coupled to the frame 12 (seeFIG. 4 ) penetrates. - A plurality of second coupling holes 115 may be provided. The
core body 111 according to the other embodiment of the present disclosure may include four second coupling holes 115, although not limited thereto. - The
stator core 110 may include a plurality ofunit cores 110a that are stacked on one another. At least one part of the plurality ofunit cores 110a may include aunit coupling portion 500a. Since the plurality ofunit cores 110a are stacked to form thestator core 110, a plurality ofunit coupling portions 500a may form thecoupling portion 500. - The plurality of
unit cores 110a including theunit coupling portion 500a forming thecoupling portion 500 may be disposed below a plurality ofdifferent unit cores 110a, although not limited thereto. - The
coupling portion 500 may include a groove in which thesupport member 60 is inserted. The insertion portion 62 inserted in thecoupling portion 500 may be positioned on thebracket 202. - The
bracket 202 may cover an open side of thecoupling portion 500. - The area of the
coupling portion 500 may be larger than the cross-section area of thesupport member 60, and may be equal to or smaller than three times the cross-section area of thesupport member 60, although not limited thereto. -
FIG. 11 is a perspective view showing the bottom of a support structure of a pickup shaft in a compressor according to another embodiment of the present disclosure.FIG. 12 shows a coupling portion provided in a unit core in the compressor shown inFIG. 11 . - As shown in
FIGS. 11 and12 , thebracket 202 according to the other embodiment of the present disclosure may be disposed adjacent to thelower insulator 122. Thebracket 202 may be spaced from thelower insulator 122. Thebracket 202 may be spaced outward from thelower insulator 122. - The
bracket 202 may be coupled with the frame 12 (seeFIG. 4 ) with thestator core 110 in between. Thebracket 202 may be coupled to theframe 12 by a coupling member (not shown) penetrating thestator core 110. - A plurality of
brackets 202 may be provided. Thebracket 202 according to the other embodiment of the present disclosure may be configured as two pieces, although not limited thereto. However, thebracket 202 may be configured in various forms, as long as it can couple and support the components installed in the inside of the case 10 (seeFIG. 1 ). - The
bracket 202 may include thebumper member 220 for reducing vibrations of thecompressor 1. A plurality ofbumper members 220 may be provided. Thebracket 202 according to the other embodiment of the present disclosure may include twobumper members 220 for eachbracket 202, although not limited thereto. - The
stator core 110 may include acoupling portion 600 which is formed in thestator core 110 and to which thesupport member 60 is coupled. Thecoupling portion 600 may be formed in the outer wall of thestator core 110. - The
stator core 110 may be made of a material having higher strength than the material forming theinsulator 120. For example, thestator core 110 may be an electromagnetic steel sheet. - The
stator core 110 may include acore body 111, and a windingportion 112 extending inward from thecore body 111, wherein the stator coil 130 (seeFIG. 4 ) is wound around the windingportion 112. - The
core body 111 may be in the shape of a circle, and a plurality of windingportions 112 may be provided. Thecoupling portion 600 may be formed in thecore body 111. - The
core body 111 may include afirst core body 113 to which thebracket 202 is coupled, and asecond core body 114 extending from thefirst core body 113. Thecoupling portion 600 may be formed in thesecond core body 114, although not limited thereto. - The
core body 111 may include thesecond coupling hole 115 which a coupling member (not shown) to be coupled to theframe 12 penetrates. - The
core body 111 may include asecond coupling hole 115 which a coupling member (not shown) to be coupled to the frame 12 (seeFIG. 4 ) penetrates. - A plurality of second coupling holes 115 may be provided. The
core body 111 according to the other embodiment of the present disclosure may include four second coupling holes 115, although not limited thereto. - The
stator core 110 may include a plurality ofunit cores 110a that are stacked on one another. - The
coupling portion 600 may be formed in thelowest unit core 110a of the plurality ofunit cores 110a. Thecoupling portion 600 may include acoupling portion body 610 extending downward from thelowest unit core 110a of the plurality ofunit cores 110a, andaccommodating space 620 which is formed in thecoupling portion body 610 and in which thesupport member 60 is inserted. - Since the
coupling portion body 610 is curved downward from thelowest unit core 110a of the plurality ofunit cores 110a to form theaccommodating space 620, thecoupling portion 600 may form a nearly "U"-shaped groove. - Another
unit core 110a neighboring thelowest unit core 110a of the plurality ofunit cores 110a may be stacked on thelowest unit core 110a to cover one side of theaccommodating space 620. - The
accommodating space 620 may open in both front and rear directions in which the insertion portion 62 (seeFIG. 3 ) is inserted. Accordingly, thecoupling portion 600 may form a hole, although not limited thereto. - The insertion portion 62 inserted in the
accommodating space 620 may be positioned between the plurality ofunit cores 110a. - The area of the
accommodating space 620 may be larger than the cross-section area of thesupport member 60, and may be equal to or smaller than three times the cross-section area of thesupport member 60, although not limited thereto. - Since oil stored in the case rises along the inner circumferential surface of the rotation shaft, the oil may be efficiently supplied to the individual components even when the rotation shaft rotates at low RPM.
- Since the coupling portion to which the support member for supporting the pickup shaft is coupled is disposed at the bracket or the stator core having high strength, it may be possible to prevent breakage or abrasion of the coupling portion.
- Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the scope of the invention, which is defined in the claims.
Claims (15)
- A compressor comprising:a case (10);a stator (100), accommodated in the case (10), and including a stator core (no) and a stator coil (130);a rotor (31) rotatably disposed in an inside of the stator core (110);a bracket (200, 201, 202) coupled to a lower portion of the stator core (110);a rotation shaft (40) configured to rotate together with the rotor (31), and having a cavity (31a) for raising oil stored in the case (10);a pickup shaft (50) accommodated in the cavity (31a); anda support member (60) connected to the pickup shaft (50) to support the pickup shaft (50), and coupled to the bracket (200, 201, 202) or the stator core (110); andan insulator (120) including a lower insulator (122) disposed below the stator core (110) and an upper insulator (121) disposed between the stator core (110) and the stator coil (130),wherein the bracket (200, 201, 202) comprises a bumper portion (212) to which a bumper member (220) is coupled, andthe bracket (200, 201, 202) is disposed to be spaced outward from the insulator in a radial direction (120).
- The compressor according to claim 1, wherein the bracket (200, 201, 202) or the stator core (110) is made of a material having higher strength than a material of the insulator (120).
- The compressor according to claim 1, wherein the bracket (200, 201, 202) is made of steel.
- The compressor according to claim 1, wherein the bracket (200, 201, 202) comprises a bracket body (210), and
a coupling portion (300, 400) which is provided in the bracket body (210) and to which the support member (60) is coupled. - The compressor according to claim 4, wherein the coupling portion (300, 400) comprises a coupling portion body (310, 410) extending downward from the bracket body (210), and
an accommodating space (320, 420) which is provided in the coupling portion body (310, 410) and in which the support member (60) is inserted. - The compressor according to claim 5, wherein the support member (60) comprises an insertion portion (62) inserted in the accommodating space (320, 420).
- The compressor according to claim 6, wherein the insertion portion (62) inserted in the accommodating space (320, 420) is positioned between the coupling portion body (310, 410) and the stator core (110).
- The compressor according to claim 6, wherein the insertion portion (62) inserted in the accommodating space (320, 420) is spaced from the bracket body (210).
- The compressor according to claim 6, wherein the support member (60) further comprises an extension portion (61) bent from the insertion portion (62), and
the pickup shaft (50) comprises a through portion (52) which the extension portion (61) penetrates. - The compressor according to claim 9, wherein the extension portion (61) comprises:a first extension portion bent (61a) downward from the insertion portion (62); anda second extension portion (61b) bent from the first extension portion (61a) and penetrating the through portion (52).
- The compressor according to claim 1, wherein the stator core (110) comprises a coupling portion (500, 600) which is disposed in an outer wall of the stator core (110) and to which the support member (60) is coupled.
- The compressor according to claim 11, wherein the stator core (110) comprises:a core body (111); anda winding portion (112) extending inward from the core body (111),wherein the stator coil (130) is wound around the winding portion (112), and the coupling portion (500, 600) is provided in the core body (111).
- The compressor according to claim 11, wherein the stator core (110) comprises a plurality of unit cores (110a) stacked on one another, and
the coupling portion (600) comprises:a coupling portion body (610) extending downward from a lowest unit core of the plurality of unit cores (110a); andan accommodating space (620) which is provided in the coupling portion body (600) and in which the support member (60) is inserted. - The compressor according to claim 12, wherein the core body (111) comprises:a first core body (113) to which the bracket (200, 201, 202) is coupled; anda second core body (114) extending from the first core body (113),wherein the coupling portion (500, 600) is provided in the second core body (114).
- The compressor according to claim 5, wherein a diameter of the accommodating space (620) is equal to or smaller than three times a diameter of the support member (60).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020170168932A KR102491596B1 (en) | 2017-12-11 | 2017-12-11 | Compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3495659A1 EP3495659A1 (en) | 2019-06-12 |
EP3495659B1 true EP3495659B1 (en) | 2021-01-13 |
Family
ID=64456908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18208169.5A Active EP3495659B1 (en) | 2017-12-11 | 2018-11-23 | Compressor |
Country Status (5)
Country | Link |
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US (1) | US20190178240A1 (en) |
EP (1) | EP3495659B1 (en) |
KR (1) | KR102491596B1 (en) |
CN (1) | CN111480004B (en) |
WO (1) | WO2019117471A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112032042A (en) * | 2020-08-31 | 2020-12-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Oil pumping assembly, compressor and air conditioning unit |
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US20020170779A1 (en) * | 2001-05-18 | 2002-11-21 | Lg Electronics Inc. | Oil supply apparatus for hermetic compressor |
US20170204753A1 (en) * | 2016-01-19 | 2017-07-20 | Whirlpool S.A. | Variable Speed Cooling Compressor Including Lubricating Oil Pumping System |
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US2125645A (en) * | 1936-06-11 | 1938-08-02 | Crosley Radio Corp | Lubricating enclosed engines |
JPS60119389A (en) * | 1983-11-30 | 1985-06-26 | Toshiba Corp | Sealed-type compressor |
DE19510015C2 (en) * | 1995-03-20 | 1997-04-30 | Danfoss Compressors Gmbh | Oil pump, especially for a hermetically sealed refrigerant compressor |
US6149503A (en) * | 1995-06-23 | 2000-11-21 | Unova Uk Limited | Method and apparatus for supporting a crankshaft in a grinding machine for grinding the crankpins of the crankshaft |
IT245317Y1 (en) * | 1998-07-01 | 2002-03-20 | Zanussi Elettromecc | PERFECTED HERMETIC MOTOR-COMPRESSOR GROUP |
KR100395956B1 (en) * | 2001-05-18 | 2003-08-27 | 주식회사 엘지이아이 | Oil Pumping apparatus for hermetic compressor |
KR100693171B1 (en) * | 2001-05-18 | 2007-03-13 | 주식회사 엘지이아이 | Oil Pumping apparatus for hermetic compressor |
KR200242871Y1 (en) * | 2001-05-18 | 2001-10-15 | 엘지전자주식회사 | Oil Pumping apparatus for hermetic compressor |
JP4380630B2 (en) * | 2003-03-14 | 2009-12-09 | パナソニック株式会社 | Compressor |
DE102007038443B4 (en) * | 2007-08-16 | 2010-02-11 | Danfoss Compressors Gmbh | Hermetically sealed refrigerant compressor device |
BRPI0804302B1 (en) * | 2008-10-07 | 2020-09-15 | Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda | OIL PUMP ASSEMBLY ARRANGEMENT IN A COOLING COMPRESSOR |
BRPI0904172A2 (en) * | 2009-10-27 | 2011-06-28 | Whirlpool Sa | Suspension spring mounting arrangement on a refrigeration compressor |
CN201737237U (en) * | 2010-01-27 | 2011-02-09 | 陶健 | Removable packaging box |
KR101326838B1 (en) * | 2011-11-02 | 2013-11-11 | 현대자동차주식회사 | Ureawater pump structure |
KR101483519B1 (en) * | 2012-05-15 | 2015-01-16 | 삼성전자 주식회사 | Hermetic reciprocating compressor |
KR102149737B1 (en) * | 2013-11-28 | 2020-10-26 | 삼성전자주식회사 | Compressor |
IT201600101067A1 (en) * | 2016-10-07 | 2018-04-07 | Italia Wanbao Acc S R L | ELASTIC SUPPORT BRACKET FOR A PUMPING ELEMENT OF A HERMETIC COMPRESSOR |
CN206202695U (en) * | 2016-11-23 | 2017-05-31 | 深圳市守正航空工业有限公司 | A kind of cover board connecting component, cover plate and aero seat |
-
2017
- 2017-12-11 KR KR1020170168932A patent/KR102491596B1/en active IP Right Grant
-
2018
- 2018-11-08 CN CN201880080054.XA patent/CN111480004B/en active Active
- 2018-11-08 WO PCT/KR2018/013532 patent/WO2019117471A1/en active Application Filing
- 2018-11-23 EP EP18208169.5A patent/EP3495659B1/en active Active
- 2018-12-11 US US16/215,881 patent/US20190178240A1/en not_active Abandoned
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US20020170779A1 (en) * | 2001-05-18 | 2002-11-21 | Lg Electronics Inc. | Oil supply apparatus for hermetic compressor |
US20170204753A1 (en) * | 2016-01-19 | 2017-07-20 | Whirlpool S.A. | Variable Speed Cooling Compressor Including Lubricating Oil Pumping System |
Also Published As
Publication number | Publication date |
---|---|
US20190178240A1 (en) | 2019-06-13 |
CN111480004B (en) | 2022-12-30 |
WO2019117471A1 (en) | 2019-06-20 |
EP3495659A1 (en) | 2019-06-12 |
CN111480004A (en) | 2020-07-31 |
KR20190068782A (en) | 2019-06-19 |
KR102491596B1 (en) | 2023-01-25 |
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