WO2020085427A1 - Compresseur hermétique et dispositif de réfrigération - Google Patents

Compresseur hermétique et dispositif de réfrigération Download PDF

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Publication number
WO2020085427A1
WO2020085427A1 PCT/JP2019/041695 JP2019041695W WO2020085427A1 WO 2020085427 A1 WO2020085427 A1 WO 2020085427A1 JP 2019041695 W JP2019041695 W JP 2019041695W WO 2020085427 A1 WO2020085427 A1 WO 2020085427A1
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WO
WIPO (PCT)
Prior art keywords
shaft portion
bearing
main shaft
hermetic compressor
iron core
Prior art date
Application number
PCT/JP2019/041695
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English (en)
Japanese (ja)
Inventor
誠吾 柳瀬
Original Assignee
パナソニック アプライアンシズ リフリジレーション デヴァイシズ シンガポール
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニック アプライアンシズ リフリジレーション デヴァイシズ シンガポール, パナソニックＩｐマネジメント株式会社 filed Critical パナソニック アプライアンシズ リフリジレーション デヴァイシズ シンガポール
Publication of WO2020085427A1 publication Critical patent/WO2020085427A1/fr

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    • 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

Definitions

  • the present invention relates to a hermetic compressor and a refrigeration system.
  • a compressor provided with an outer rotor type motor of Patent Document 1 is known.
  • the bearing frame is arranged at the lower end of the main frame, and the motor is arranged between the main frame and the bearing frame.
  • the motor has a stator and a rotor rotatably arranged outside the stator.
  • the present invention has been made to solve such a problem, and an object of the present invention is to provide a hermetic compressor and a refrigeration system capable of suppressing a decrease in efficiency of an electric element.
  • a hermetic compressor includes a compression element that compresses a refrigerant gas, a stator having an iron core around which a winding is wound, and a rotor that surrounds the periphery of the stator. And an electric element for driving the compression element, and a closed container for accommodating the compression element and the electric element, wherein the compression element is provided with a main shaft portion and an eccentricity provided eccentrically on the main shaft portion.
  • a crankshaft having a shaft portion, a main bearing that pivotally supports the first portion of the main shaft portion, and a block having a cylinder are connected to the eccentric shaft portion via a connecting rod and reciprocally movable in the cylinder.
  • a refrigeration system includes a refrigeration cycle in which a hermetic compressor, a radiator, a decompression device, and a heat absorber are annularly connected by piping.
  • the present invention has an effect that it is possible to provide a hermetic compressor and a refrigerating apparatus having the above-mentioned configuration and capable of suppressing a decrease in efficiency of an electric element.
  • a hermetic compressor includes a compression element that compresses a refrigerant gas, a stator having an iron core around which a winding is wound, and a rotor that surrounds the stator.
  • a main bearing that pivotally supports the first portion of the main shaft portion, and a block having a cylinder, and the block is connected to the eccentric shaft portion via a connecting rod, and is reciprocally provided in the cylinder.
  • the heat of the iron core is easily transferred to the auxiliary bearing, which has a higher thermal conductivity than the iron core, so that the temperature rise of the iron core is suppressed. Therefore, it is possible to suppress a decrease in the efficiency of the electric element due to the temperature rise of the iron core.
  • the Young's modulus of the sub bearing may be lower than the Young's modulus of the main shaft portion. According to the present invention, for example, even if the main shaft portion oscillates, the sub bearing can support the main shaft portion by bending along the main shaft portion. Therefore, twisting of the main shaft portion with respect to the auxiliary bearing can be prevented, and energy loss due to sliding (sliding loss) can be reduced.
  • the hermetic compressor according to the third invention is the hermetic compressor according to the first or second invention, wherein the sub bearing may be made of aluminum.
  • the aluminum sub-bearing has a thermal conductivity higher than that of the iron core and a Young's modulus lower than that of the main shaft portion. Therefore, sliding loss can be reduced while suppressing a decrease in efficiency of the electric element.
  • the sub bearing in any one of the first to third aspects of the invention, may be immersed in the oil stored in the hermetic container.
  • the heat transferred from the iron core to the auxiliary bearing is dissipated by the oil. Therefore, the temperature rise of the iron core is further suppressed, and the efficiency decrease of the electric element can be further suppressed.
  • a hermetic compressor according to a fifth invention is the hermetic compressor according to any one of the first to fourth inventions, wherein the compression element further comprises a support frame for fixing the sub bearing to the block, and the support frame is the hermetic container. It may be immersed in the oil stored in. According to the present invention, the heat transferred from the iron core to the support frame via the auxiliary bearing is dissipated by the oil. Therefore, the temperature rise of the iron core is further suppressed, and the efficiency decrease of the electric element can be further suppressed.
  • a hermetic compressor according to a sixth aspect is the hermetic compressor according to any one of the first to fifth aspects, wherein the compression element further includes a support frame that fixes the sub bearing to the block.
  • the first fixing portion that fixes the main shaft portion may be provided farther from the main shaft portion in the radial direction of the main shaft portion than the second fixing portion that fixes the sub bearing and the iron core.
  • the electric element in any one of the first to sixth inventions, may be driven by an inverter at a plurality of frequencies. According to the present invention, by driving the electric element at a high frequency, the heat of the iron core easily moves to the auxiliary bearing even when the temperature of the iron core easily rises. As a result, the temperature rise of the iron core can be suppressed and the efficiency of the electric element can be prevented from decreasing.
  • the refrigerating apparatus includes a refrigerating cycle in which the hermetic compressor, radiator, decompressor, and heat absorber according to any one of the first to seventh aspects of the invention are annularly connected by piping.
  • the hermetic compressor as described above can suppress a decrease in the efficiency of the electric element even in the refrigeration system.
  • the hermetic compressor 100 is a device that pumps a refrigerant gas 112 as shown in FIGS. 1 and 2, and is used, for example, in a refrigeration cycle.
  • Examples of the apparatus using the refrigeration cycle include household appliances and commercial appliances.
  • Examples of the household appliances include refrigerating devices such as electric refrigerators and air conditioners, and examples of the commercial appliances include refrigerating devices such as commercial showcases and vending machines.
  • the hermetic compressor 100 has a compressor body 108 and a hermetic container 102, and the compressor body 108 has an electric element 104 and a compression element 106.
  • the closed container 102 is formed by, for example, drawing an iron plate.
  • the hermetic container 102 houses the compressor body 108 in the internal space and hermetically seals the internal space.
  • the compressor body 108 is elastically supported by the closed container 102 by an elastic member such as a coil spring 110.
  • the hermetic container 102 is filled with a refrigerant gas 112 and stores oil 114.
  • a refrigerant gas 112 for example, a heat medium such as hydrocarbon R600a having a low global warming potential is used.
  • the oil 114 is used to lubricate the compression element 106, for example, and is stored in the lower portion of the closed container 102.
  • a suction pipe 116 and a discharge pipe are connected to the closed container 102.
  • One end of the suction pipe 116 and the discharge pipe communicate with the internal space of the closed container 102, and the other end is connected to piping (not shown) of the refrigeration cycle.
  • the refrigerant gas 112 flows into the closed container 102 through the suction pipe 116, is compressed by the compression element 106 in the closed container 102, and is discharged through the discharge pipe.
  • the electric element 104 has a stator 119 and a rotor 120, which drive the compression element 106.
  • the rotor 120 has, for example, a yoke and a magnet 120c, and the yoke has a top surface portion 120a and a side surface portion 120b.
  • the cylindrical side surface portion 120b extends downward from the outer peripheral end of the disk-shaped top surface portion 120a.
  • a stator 119 is arranged below the top surface portion 120a and inside the side surface portion 120b. Therefore, the periphery of the stator 119 is surrounded by the rotor 120.
  • the magnet 120c is attached to the inner peripheral surface of the side surface portion 120b between the side surface portion 120b and the stator 119. As a result, the rotor 120 rotates around the stator 119. Therefore, the electric element 104 is an outer rotor type motor.
  • the stator 119 has a cylindrical shape, is arranged coaxially with the rotor 120 inside the rotor 120, and has an iron core (fixed iron core 117) and a winding 118.
  • the fixed iron core 117 is formed by laminating a plurality of laminated steel plates, for example, and the laminated steel plate is formed of an electromagnetic steel plate such as a silicon steel plate.
  • the fixed iron core 117 has, for example, a substantially cylindrical shape, and has a first through hole 117a extending in the vertical direction.
  • the fixed iron core 117 has an inner peripheral surface surrounding the periphery of the first through hole 117a and an outer peripheral surface on the opposite side in the radial direction.
  • a plurality of grooves (slots) are provided on the outer peripheral surface.
  • the slot is recessed from the outer peripheral surface toward the inner peripheral surface and extends vertically. Therefore, the fixed iron core 117 is provided with a cylindrical central cylindrical portion 117b between the inner peripheral surface and the slot in the radial direction.
  • the plurality of slots are arranged at intervals in the circumferential direction, and partition walls 117c are provided between the adjacent slots.
  • the partition wall 117c extends radially outward from a portion corresponding to the outer peripheral surface of the central cylindrical portion 117b.
  • the winding 118 is, for example, an insulated wire in which the surface of a conductor such as copper is covered with an insulating layer such as enamel.
  • the winding 118 is connected to the inverter 101 connected to the power supply.
  • the drive frequency of the electric element 104 is controlled by the inverter 101, and the electric element 104 is driven at a plurality of frequencies.
  • the winding 118 is inserted into the slot of the fixed iron core 117 and wound around the partition wall 117c. Therefore, the winding 118 extends in the axial direction (vertical direction) of the stator 119 in the slot, and the upper surface and the lower surface of the partition wall 117c are covered with the winding 118.
  • the central cylindrical portion 117b provided on the first through hole 117a side of the partition wall 117c is not covered by the winding 118, and the upper surface and the lower surface are exposed to the outside.
  • a plurality of first insertion holes 117d are provided in the central cylindrical portion 117b. The first insertion hole 117d extends in the vertical direction and penetrates the fixed iron core 117.
  • the compression element 106 includes a crankshaft 134, a piston 124, a connecting rod 150, a block 121, a support frame 162, and an auxiliary bearing 146.
  • the crankshaft 134 is made of a highly rigid casting or the like, and has a main shaft portion 144, an eccentric shaft portion 145, a collar portion 134a, and a cavity portion 152.
  • the main shaft portion 144 and the eccentric shaft portion 145 have a cylindrical shape with a central axis extending in the vertical direction, and the eccentric shaft portion 145 is provided eccentrically with respect to the main shaft portion 144.
  • the collar portion 134a extends below the eccentric shaft portion 145 from the upper end of the main shaft portion 144 in a direction orthogonal to the vertical direction.
  • the main shaft part 144 has a first part 141 and a second part 142.
  • the second portion 142 is provided on the opposite side (lower side) to the eccentric shaft portion 145 side with respect to the first portion 141, spaced apart from the first portion 141.
  • the lower part of the main shaft part 144 is immersed in the oil 114.
  • the hollow portion 152 has a cylindrical shape, and is opened on the lower surface of the main shaft portion 144, and the opening is immersed in the oil 114.
  • the hollow portion 152 extends upward from this opening in the main shaft portion 144 and reaches the upper portion of the eccentric shaft portion 145 of the crankshaft 134, the upper portion of the flange portion 134a, and the like.
  • the pump body 154 is inserted into the cavity portion 152, and a gap is provided between the inner peripheral surface of the cavity portion 152 and the outer peripheral surface of the pump body 154.
  • the pump body 154 has a cylindrical shape, and a spiral groove is provided on the outer peripheral surface thereof.
  • the pump body 154 is fixed to the auxiliary bearing 146 by a fixing member 156 so as not to rotate together with the main shaft portion 144, and constitutes a viscous pump.
  • the block 121 has a cylinder 122, a main bearing 136, a thrust surface 139, and legs 138.
  • the cylinder 122 has a cylindrical shape whose central axis extends in a direction orthogonal to the vertical direction, and has an internal space.
  • a piston 124 is reciprocally fitted into the internal space from one opening side thereof.
  • the other opening 126 of the cylinder 122 is covered by a valve plate 128, and the valve plate 128 is fixed to the cylinder 122 by a cylinder head 132.
  • the compression chamber 130 surrounded by the cylinder 122, the piston 124, and the valve plate 128 is formed.
  • the piston 124 is connected to the eccentric shaft portion 145 by a connecting rod 150.
  • the piston 124 reciprocates by the rotation of the eccentric shaft portion 145, and compresses the refrigerant gas 112 in the compression chamber 130.
  • the crankshaft 134 having the eccentric shaft portion 145 receives the compressive load from the piston 124 via the connecting rod 150.
  • the main bearing 136 has a cylindrical shape whose central axis extends in the vertical direction, and is arranged below the cylinder 122 in the block 121.
  • the main shaft portion 144 of the crankshaft 134 is rotatably inserted in the main bearing 136, and the main bearing 136 pivotally supports the main shaft portion 144.
  • the inner peripheral surface (first sliding surface) of the main bearing 136 faces the outer peripheral surface (first sliding surface) of the first portion 141 of the main shaft portion 144, and the rotation of the main shaft portion 144 causes the first portion 141 to rotate. Of the main bearing 136 slides on the first slide surface of the main bearing 136.
  • the rotor 120 of the electric element 104 is provided below the main bearing 136, and the top surface portion 120 a of the rotor 120 is fixed to the main shaft portion 144.
  • the fixed portion is provided closer to the main bearing 136 than the sub bearing 146 in the vertical direction.
  • the main shaft portion 144 rotates as the rotor 120 rotates.
  • the thrust surface 139 is formed on the upper surface of the main bearing 136 and extends in the direction orthogonal to the vertical direction.
  • a ball bearing 140 is arranged on the thrust surface 139. The ball bearing 140 supports the load of the crankshaft 134 between the thrust surface 139 and the flange portion 134 a of the crankshaft 134.
  • a plurality of leg portions 138 are provided on the block 121, and extend downward in the vertical direction.
  • the plurality of legs 138 are arranged so as to surround the main bearing 136 and support the cylinder 122 and the thrust surface 139.
  • the number of legs 138 is not limited to four, and may be two, three, or five.
  • the support frame 162 is formed of a highly rigid material such as steel, has a flat plate shape, and has a support plate portion 163 and a support leg portion 164.
  • the support plate portion 163 has an annular shape and has a second through hole 163a at the center.
  • a plurality of second insertion holes 163b are formed in the support plate portion 163 so as to surround the periphery of the second through hole 163a.
  • the plurality of (for example, four) support leg portions 164 are radially spaced from the outer peripheral edge of the support plate portion 163 and are circumferentially spaced from each other around the second through hole 163 a of the support plate portion 163. It is extended.
  • a third insertion hole 164a is provided at the tip of the support leg 164.
  • the lower surface of the leg portion 138 of the block 121 is superposed on the upper surface of the support leg portion 164, the snubb bar bolt 165 is passed through the third insertion hole 164a from below, and the support frame 162 is fixed to the leg portion 138 of the block 121. There is.
  • the stator 119 is arranged between the support frame 162 and the top surface portion 120a of the rotor 120 in the vertical direction.
  • the auxiliary bearing 146 is made of a material whose thermal conductivity is higher than that of the fixed iron core 117.
  • the sub-bearing 146 is made of a material having a Young's modulus lower than that of the main shaft portion 144.
  • the sub bearing 146 is made of aluminum.
  • the thermal conductivity of aluminum is 20 times higher than the thermal conductivity of magnetic steel sheets generally used for the fixed iron core 117. Also, the Young's modulus of aluminum is 30% lower than the Young's modulus of castings commonly used for crankshafts 134.
  • the auxiliary bearing 146 has a shaft support portion 171, a mounting portion 170, and a flange portion 172.
  • the mounting portion 170 has a cylindrical shape, and is provided with a third through hole 170b at the center and a fourth insertion hole 170c provided around the third through hole 170b.
  • the third through hole 170b vertically penetrates the mounting portion 170, and the fourth insertion hole 170c extends downward from the upper surface (mounting surface 170a) of the mounting portion 170.
  • the second fixing portion 178 such as a bolt is inserted into the first insertion hole 117d of the central cylindrical portion 117b of the fixed iron core 117 and the fourth insertion hole 170c of the mounting portion 170 and fastened.
  • the central cylindrical portion 117b of the fixed iron core 117 and the mounting portion 170 of the sub bearing 146 are fixed. Since the central cylindrical portion 117b is not covered by the winding 118, the mounting surface 170a of the mounting portion 170 is in contact (close contact) with the lower surface of the central cylindrical portion 117b.
  • the flange portion 172 has an annular shape and protrudes radially from the outer peripheral surface of the mounting portion 170 between the mounting surface 170a of the mounting portion 170 and the shaft supporting portion 171 in the vertical direction.
  • the flange portion 172 is provided with a fifth insertion hole 172a penetrating in the vertical direction.
  • the upper surface of the flange portion 172 is overlapped with the lower surface of the support plate portion 163 of the support frame 162, and the first insertion hole 163b of the support plate portion 163 and the first bolt such as a bolt inserted in the fifth insertion hole 172a of the flange portion 172.
  • the fixed portion 174 is fastened.
  • the flange portion 172 of the auxiliary bearing 146 and the support plate portion 163 of the support frame 162 are fixed. Since the support frame 162 is fixed to the block 121, the auxiliary bearing 146 is fixed to the block 121 via the support frame 162.
  • the shaft support portion 171 has a cylindrical shape and is provided below the mounting portion 170 and the flange portion 172. Therefore, the shaft supporting portion 171 is arranged below the support frame 162 fixed to the mounting portion 170.
  • the main shaft part 144 is inserted into the fourth through hole 171a at the center of the shaft support part 171 and the third through hole 170b of the mounting part 170.
  • the inner peripheral surfaces of the shaft supporting portion 171 and the mounting portion 170 face the outer peripheral surface of the second portion 142 of the main shaft portion 144.
  • the inner diameter of the shaft supporting portion 171 (the diameter of the fourth through hole 171a) is set smaller than the inner diameter of the mounting portion 170 (the diameter of the third through hole 170b) and slightly larger than the outer diameter of the second portion 142 of the main shaft portion 144.
  • the inner peripheral surface of the mounting portion 170 is arranged with a space from the main shaft portion 144.
  • the main shaft portion 144 rotatably supports the second portion 142 of the main shaft portion 144, and the outer peripheral surface (second sliding surface) of the second portion 142 is inside the shaft support portion 171. It slides on the peripheral surface (second sliding surface 176).
  • the lower end of the shaft support portion 171 is located below the lower end of the main shaft portion 144, and the main shaft portion 144 is housed inside. Further, since the surface of the oil 114 is located above the upper end of the second sliding surface 176 of the shaft supporting portion 171, the shaft supporting portion 171 is immersed in the oil 114 up to the upper end of the second sliding surface 176. ing. The oil 114 lubricates between the second sliding surface 176 and the second sliding surface of the second portion 142. Therefore, the friction during this period is reduced, and the reduction in efficiency of the electric element 104 can be suppressed.
  • the fourth insertion hole 170c is arranged between the second sliding surface 176 and the fifth insertion hole 172a in the direction orthogonal to the vertical direction. Therefore, the first fixing portion 174 inserted into the fifth insertion hole 172a has a main shaft portion that faces the second sliding surface 176 more than the second fixing portion 178 inserted into the fourth insertion hole 170c. It is provided on the opposite side to the 144 side. As a result, the first fixing portion 174 is arranged farther from the main shaft portion 144 in the radial direction of the main shaft portion 144 than the second fixing portion 178.
  • hermetic compressor 100 when the stator 119 of the electric element 104 is energized from the power supply via the inverter 101, a magnetic field is generated in the stator 119 and the rotor 120 rotates. By controlling the frequency of this current by the inverter 101, the rotation speed of the rotor 120 changes according to the frequency.
  • the rotating main shaft portion 144 does not directly agitate the oil 114.
  • the waviness of the surface of the stored oil 114 can be suppressed to be small. Therefore, it is possible to secure a stable supply amount of the oil 114 to each sliding portion. Even when the sub bearing 146 is immersed in the oil 114, the noise of the oil 114 colliding with the sub bearing 146 can be suppressed to a low level, and the noise of the hermetic compressor 100 can be suppressed to a low level.
  • the fixed iron core 117 and the winding wire 118 which generate the largest amount of heat in the electric element 104, are surrounded by the support frame 162 and the rotor 120. For this reason, heat is accumulated in the stator 119, the temperature rises, and the efficiency of the electric element 104 is likely to decrease.
  • the thermal conductivity of the auxiliary bearing 146 is higher than that of the fixed iron core 117. Therefore, the heat of the fixed iron core 117 easily moves to the sub bearing 146, and the cooling of the stator 119 is promoted by the sub bearing 146. As a result, it is possible to suppress a decrease in the efficiency of the electric element 104 due to the temperature increase of the stator 119.
  • a support frame 162 for fixing the sub bearing 146 to the block 121 is formed separately from the sub bearing 146. Therefore, the support frame 162 can be formed of steel or the like having higher rigidity than the sub bearing 146. As a result, even if the second portion 142 of the main shaft portion 144 slides on the second sliding surface 176 of the sub bearing 146, the sub bearing 146 is supported by the support frame 162, so that the main shaft for the sub bearing 146 is supported. The misalignment of the portion 144 can be prevented. Therefore, it is possible to prevent an increase in input power due to misalignment.
  • the Young's modulus of the auxiliary bearing 146 is lower than that of the crankshaft 134. Therefore, even if the second sliding surface 176 of the auxiliary bearing 146 and the second portion 142 of the main shaft portion 144 slide, the coefficient of friction of the second sliding surface 176 with respect to the second portion 142 is kept low. You can Therefore, the sliding loss between them can be reduced.
  • the sub-bearing 146 having a low Young's modulus can support the main shaft part 144 along the bent main shaft part 144. Therefore, twisting of the main shaft portion 144 with respect to the sub bearing 146 can be reduced, and sliding loss can be reduced.
  • the sub bearing 146 is made of aluminum.
  • the thermal conductivity of the auxiliary bearing 146 can be made higher than that of the fixed iron core 117, and the Young's modulus of the auxiliary bearing 146 can be made lower than the Young's modulus of the crankshaft 134. Therefore, it is possible to suppress a decrease in efficiency of the electric element 104 and reduce sliding loss.
  • the auxiliary bearing 146 is immersed in the oil 114 up to the upper end of the second sliding surface 176 of the shaft support 171.
  • the oil 114 is cooled by the heat radiation effect of the closed container 102. Therefore, even if heat is transferred from the fixed iron core 117 to the sub bearing 146, this heat is dissipated from the sub bearing 146 to the oil 114. Therefore, the temperature rise of the stator 119 and the auxiliary bearing 146 can be further suppressed, and the efficiency reduction of the electric element 104 can be reduced.
  • the second slidable surface 176 of the shaft support portion 171 is immersed in the oil 114, so that the oil 114 can be always interposed between the second slidable surface 176 and the second portion 142 of the main shaft portion 144. it can.
  • the oil 114 lubricates the space between the second sliding surface 176 and the second portion 142, so that sliding loss can be reduced and durability can be improved.
  • the electric element 104 is driven by the inverter 101 at a plurality of frequencies. At this time, when the electric element 104 is driven at a high frequency (high speed), the current flowing through the winding 118 of the stator 119 increases, and the winding 118 generates heat. As a result, when the temperature of the fixed iron core 117 is increased by being wound by the winding 118, the efficiency of the electric element 104 is reduced.
  • the auxiliary bearing 146 is formed of a material having a high thermal conductivity or is immersed in the oil 114, so that the temperature rise of the fixed iron core 117 fixed to the auxiliary bearing 146 is suppressed. ing. Therefore, the decrease in efficiency of the electric element 104 is reduced.
  • stress strain may occur in the flange portion 172 of the sub bearing 146 due to the stress due to the fastening of the first fixing portion 174 that fixes the sub bearing 146 and the support frame 162.
  • the first fixing portion 174 is provided on the side opposite to the main shaft portion 144 side with respect to the second fixing portion 178 fixing the auxiliary bearing 146 and the fixed iron core 117, and the second fixing portion 178 is provided. Is farther from the main shaft portion 144. Therefore, in the sub bearing 146, the stress strain of the flange portion 172 is less likely to reach the second slide surface 176 on the main shaft portion 144 side, and the sliding loss between the second slide surface 176 and the second portion 142 of the main shaft portion 144. Can be suppressed, and an increase in input power due to deformation can be prevented.
  • the second sliding surface 176 is arranged below the first fixing portion 174. As a result, even if stress strain occurs in the flange portion 172 due to the stress due to the fastening of the first fixing portion 174, this strain is unlikely to reach the second sliding surface 176. Therefore, the sliding loss between the second sliding surface 176 and the second portion 142 of the main shaft portion 144 is suppressed, and the increase in input power due to deformation can be prevented.
  • the configuration in which the electric element 104 is below the compression element 106 is used for the hermetic compressor 100.
  • the electric element 104 may be located above the compression element 106.
  • the cylinder 122 and the piston 124 are arranged below the stator 119 and the rotor 120. Even with the hermetic compressor 100 having such a configuration, it is possible to suppress a decrease in efficiency of the electric element 104.
  • the surface of the oil 114 stored in the closed container 102 may be located above the upper surface of the support frame 162. As a result, not only the sub bearing 146 but also the support frame 162 fixed to the sub bearing 146 is immersed in the oil 114.
  • the support frame 162 is in close contact with the frame portion of the auxiliary bearing 146 and is fixed by the first fixing portion 174. Therefore, heat is transferred from the fixed iron core 117 to the support frame 162 via the sub bearing 146, and this heat is dissipated to the oil 114 not only from the sub bearing 146 but also from the support frame 162. Further, since the surface area of the support frame 162 is large, the temperature rise of the stator 119 and the auxiliary bearing 146 can be further suppressed, and the efficiency decrease of the electric element 104 can be reduced.
  • the refrigerating apparatus 200 includes a casing 201 and a refrigerating cycle 210, as shown in FIG.
  • a refrigerator will be described as the refrigerating apparatus 200, but the refrigerating apparatus 200 is not limited to the refrigerator.
  • the housing 201 includes a main body 202 and a door 203.
  • the main body 202 has, for example, a rectangular parallelepiped shape, and has an opening and five walls.
  • the door 203 is attached to the main body 202 so as to open and close the opening of the main body 202.
  • the wall of the main body 202 and the door 203 are formed of a heat insulating material, and the internal space surrounded by the main body 202 and the door 203 is thermally insulated from the outside.
  • a partition wall 208 is arranged in the internal space of the housing 201, and the internal space is partitioned by the partition wall 208 into a storage space 204 and a machine room 206.
  • Articles are stored in the storage space 204, and a blower (not shown) is arranged therein.
  • the refrigeration cycle 210 is a circuit in which a refrigerant circulates (refrigerant circuit), and includes a hermetic compressor 100, a radiator 214, a decompression device 216, and a heat absorber 218, which are annularly connected by a pipe 220.
  • a refrigerant circuit includes a hermetic compressor 100, a radiator 214, a decompression device 216, and a heat absorber 218, which are annularly connected by a pipe 220.
  • the hermetic compressor 100, the radiator 214, and the decompression device 216 are arranged in the machine room 206, and the heat absorber 218 is arranged in the storage space 204.
  • the refrigerant gas compressed by the hermetic compressor 100 releases heat in the radiator 214 to become a normal temperature and high pressure liquid refrigerant. Then, the liquid refrigerant has a low pressure in the decompression device 216, absorbs heat in the heat absorber 218, is vaporized into a low-temperature and low-pressure refrigerant gas, and returns to the hermetic compressor 100.
  • the air cooled by the heat absorber 218 is circulated in the storage space 204 by a blower as shown by an arrow M. As a result, the storage space 204 is cooled.
  • the efficiency reduction of the electric element 104 is suppressed, the efficiency reduction of the refrigeration apparatus 200 including the hermetic compressor 100 is also reduced. Further, since the noise of the hermetic compressor 100 is suppressed, the noise of the refrigeration system 200 including the hermetic compressor 100 can also be suppressed.
  • the hermetic compressor and the refrigerating apparatus of the present invention are useful as a hermetic compressor, a refrigerating apparatus, and the like that can suppress a decrease in the efficiency of electric elements.
  • Hermetic compressor 101 Inverter 102: Hermetic container 104: Electric element 106: Compressing element 112: Refrigerant gas 114: Oil 117: Fixed iron core (iron core) 118: Winding 119: Stator 120: Rotor 121: Block 122: Cylinder 124: Piston 134: Crankshaft 136: Main bearing 141: First part 142: Second part 144: Main shaft part 145: Eccentric shaft part 146: Secondary bearing 150: Connecting rod 162: Support frame 174: First fixing part 178: Second fixing part 200: Refrigerating device 210: Refrigeration cycle 214: Radiator 216: Pressure reducing device 218: Heat absorber 220: Piping

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  • Compressor (AREA)

Abstract

L'invention concerne un compresseur hermétique (100), lequel compresseur comprend : un élément de compression (106) pour comprimer un gaz réfrigérant; un élément électrique (104) ayant un stator (119) qui a un noyau (117) sur lequel un fil de bobinage (118) est enroulé, et ayant également un rotor (120) entourant le stator, l'élément électrique (104) entraînant l'élément de compression; et un récipient hermétique (102) pour recevoir l'élément de compression et l'élément électrique. L'élément de compression a : un vilebrequin (134) ayant une section d'arbre primaire (144) et une section d'arbre excentrique (145) qui est disposée de manière excentrée par rapport à la section d'arbre primaire; un bloc (121) ayant un palier primaire (136) qui supporte une première partie (141) de la section d'arbre primaire, et ayant également un cylindre (122); un piston (124) relié à la section d'arbre excentrique par l'intermédiaire d'une tige de liaison (150) et disposé de manière à être apte à effectuer un mouvement de va-et-vient à l'intérieur du cylindre; et un palier secondaire (146) sur lequel est fixé le noyau, et qui supporte une seconde partie de la section d'arbre principale, qui est disposée sur le côté opposé d'une première partie de la section d'arbre excentrique. Le coefficient de conductivité thermique du palier secondaire est supérieur à celui du noyau.
PCT/JP2019/041695 2018-10-26 2019-10-24 Compresseur hermétique et dispositif de réfrigération WO2020085427A1 (fr)

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JP2018201496 2018-10-26

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001263247A (ja) * 2000-03-16 2001-09-26 Kokusan Denki Co Ltd 電動圧縮機及び電動圧縮機の電動機組立方法
JP2008538596A (ja) * 2004-11-24 2008-10-30 松下電器産業株式会社 密閉型圧縮機
JP2010281299A (ja) * 2009-06-08 2010-12-16 Panasonic Corp 密閉型圧縮機
CN203962324U (zh) * 2014-07-01 2014-11-26 安徽美芝制冷设备有限公司 具有外转子式电机的压缩机
WO2017033413A1 (fr) * 2015-08-25 2017-03-02 パナソニックＩｐマネジメント株式会社 Compresseur fermé et dispositif frigorifique
WO2017195523A1 (fr) * 2016-05-09 2017-11-16 日本電産テクノモータ株式会社 Compresseur

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001263247A (ja) * 2000-03-16 2001-09-26 Kokusan Denki Co Ltd 電動圧縮機及び電動圧縮機の電動機組立方法
JP2008538596A (ja) * 2004-11-24 2008-10-30 松下電器産業株式会社 密閉型圧縮機
JP2010281299A (ja) * 2009-06-08 2010-12-16 Panasonic Corp 密閉型圧縮機
CN203962324U (zh) * 2014-07-01 2014-11-26 安徽美芝制冷设备有限公司 具有外转子式电机的压缩机
WO2017033413A1 (fr) * 2015-08-25 2017-03-02 パナソニックＩｐマネジメント株式会社 Compresseur fermé et dispositif frigorifique
WO2017195523A1 (fr) * 2016-05-09 2017-11-16 日本電産テクノモータ株式会社 Compresseur

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