WO2015029603A1 - 密閉型圧縮機および冷凍サイクル装置 - Google Patents
密閉型圧縮機および冷凍サイクル装置 Download PDFInfo
- Publication number
- WO2015029603A1 WO2015029603A1 PCT/JP2014/068067 JP2014068067W WO2015029603A1 WO 2015029603 A1 WO2015029603 A1 WO 2015029603A1 JP 2014068067 W JP2014068067 W JP 2014068067W WO 2015029603 A1 WO2015029603 A1 WO 2015029603A1
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- WIPO (PCT)
- Prior art keywords
- rotating member
- refrigerant
- diameter portion
- rotor
- electric motor
- Prior art date
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Classifications
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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
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
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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
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
Definitions
- Embodiments of the present invention relate to a hermetic compressor and a refrigeration cycle apparatus.
- the hermetic compressor accommodates the compressor part and the electric motor part together with lubricating oil in a hermetic container.
- the compressor unit sucks and compresses the refrigerant, and releases the compressed refrigerant into the sealed container.
- the discharged refrigerant is discharged from the discharge port of the sealed container. At the time of this discharge, a part of the lubricating oil in the sealed container is mixed with the refrigerant and flows out of the sealed container.
- an oil separating member for separating the lubricating oil mixed in the discharged refrigerant is disposed in a sealed container (for example, Japanese Patent Laid-Open No. 8-177738).
- the oil separation member includes a rotatable disk part, a cylindrical body interposed between the disk part and the rotor of the electric motor part, and an annular elastic member attached to the cylindrical body.
- the cylindrical body transmits the rotation of the rotor of the electric motor unit to the disk unit.
- the elastic member has an elastic force for strengthening the mounting between the cylindrical body and the rotor.
- the gas refrigerant released from the compressor into the hermetic container passes through the refrigerant passage formed in the rotor of the electric motor part, and further hits the disk part before flowing to the discharge port of the hermetic container.
- the elastic member exists between the refrigerant passage and the disk portion.
- the presence of the elastic member interferes with the flow of the refrigerant, may adversely affect the discharge of the refrigerant, and may cause a decrease in the separation efficiency of the lubricating oil.
- the purpose of the hermetic compressor of this embodiment is to efficiently separate the lubricating oil mixed in the refrigerant without adversely affecting the discharge of the refrigerant.
- the hermetic compressor includes a compressor section that sucks and compresses refrigerant, a rotor and a stator, and an electric motor section that drives the compressor section, and lubricates the compressor section and the electric motor section.
- a hermetic container that contains the oil and discharges the refrigerant compressed by the compressor unit; and an oil separation unit that separates the lubricating oil mixed in the discharged refrigerant in the hermetic container.
- the oil separation unit includes a first rotating member having a flange, a second rotating member that is inserted through the first rotating member and engages the rotor, and transmits the rotation of the rotor to the first rotating member; An elastic member disposed inside the first rotating member and having elasticity to resist insertion of the second rotating member.
- FIG. 1 shows a refrigeration cycle 1 mounted on an air conditioner or the like.
- the refrigeration cycle 1 includes a hermetic compressor 2, an outdoor heat exchanger 3 that is a heat source side heat exchanger, an expansion valve (expansion device) 4, an indoor heat exchanger 5 that is a use side heat exchanger,
- the liquid separator 6 is configured to communicate with each other via a refrigerant pipe 7.
- the refrigerant pipe 7 includes a refrigerant discharge pipe 8 connected to the upper part of the hermetic compressor 2, and refrigerant suction pipes 9 a and 9 b connected to the lower part of the hermetic container 10.
- the high-pressure gas refrigerant discharged from the hermetic compressor 2 flows to the outdoor heat exchanger 3 as indicated by arrows.
- the refrigerant flowing into the outdoor heat exchanger 3 is condensed by exchanging heat with the outside air.
- the liquid refrigerant flowing out of the outdoor heat exchanger 3 flows to the indoor heat exchanger 5 via the expansion valve 4.
- the liquid refrigerant that has flowed into the indoor heat exchanger 5 evaporates by exchanging heat with the indoor air.
- the gas refrigerant flowing out from the indoor heat exchanger 5 is sucked into the hermetic compressor 2 through the gas-liquid separator 6.
- indoor air can be cooled by making the outdoor heat exchanger 3 function as a condenser and the indoor heat exchanger 5 as an evaporator.
- a four-way valve for switching the refrigerant flow path may be disposed between the refrigerant discharge pipe 8 and the refrigerant suction pipes 9a and 9b.
- the indoor heat exchanger 5 can function as a condenser and the outdoor heat exchanger 3 can function as an evaporator, so that indoor air can be warmed.
- the hermetic compressor 2 includes a hermetic container 10.
- the sealed container 10 accommodates the compressor unit 11 and the electric motor unit 12 together with the lubricating oil 100, and has a discharge port 10a in the upper part.
- the refrigerant discharge pipe 8 is connected to the discharge port 10a.
- the lubricating oil 100 is supplied to mechanical sliding portions in the compressor unit 11 and the electric motor unit 12, and the lubricity of the sliding portions is maintained.
- the compressor unit 11 is disposed at the lower part of the sealed container 10.
- the inner bottom portion of the sealed container 10 serves as an oil reservoir in which the lubricating oil 100 is accumulated.
- the compressor unit 11 is immersed in the lubricating oil 100 in the oil reservoir.
- the electric motor unit 12 is disposed between the compressor unit 11 and the discharge port 10a.
- the electric motor unit 12 includes a rotating shaft 13, a rotor 15 attached to the rotating shaft 13, and a stator 16 disposed around the rotor 15, and drives the compressor unit 11 via the rotating shaft 13. .
- a plurality of permanent magnets are embedded in the rotor 15.
- a plurality of coils are attached to the stator 16.
- the rotor 15 rotates due to the interaction between the magnetic field generated by these coils and the magnetic field generated by each permanent magnet of the rotor 15.
- the rotation shaft 13 is inserted through the axial center portion of the rotor 15 and transmits the rotation of the rotor 15 to the compressor unit 11.
- the stator 16 is fixed to the inner peripheral surface of the sealed container 10.
- Each coil mounted on the stator 16 protrudes from the upper end and the lower end along the axial direction of the stator 16.
- the protruding portion of these coils is referred to as a coil end portion 16a.
- the compressor unit 11 includes a main bearing 17 and a sub-bearing 18 that pivotally support the lower portion of the rotating shaft 13.
- a pair of eccentric parts 13 a and 13 b that rotate in the compressor part 11 are formed in the lower part of the rotating shaft 13. These eccentric portions 13a and 13b are different from each other in eccentric position by 180 degrees.
- the compressor unit 11 includes cylinders 21 a and 21 b between the main bearing 17 and the auxiliary bearing 18.
- the cylinders 21a and 21b are arranged in the vertical direction with the partition plate 20 interposed therebetween.
- a cylinder chamber 22a is formed inside the cylinder 21a.
- the cylinder chamber 22 a is closed at the upper surface by the main bearing 17 and closed at the lower surface by the partition plate 20.
- An eccentric portion 13a of the rotating shaft 13 is disposed in the cylinder chamber 22a, and a roller 23a is fitted around the eccentric portion 13a.
- a cylinder chamber 22b is formed inside the cylinder 21b.
- the upper surface of the cylinder chamber 22 b is closed by the partition plate 20, and the lower surface is closed by the auxiliary bearing 18.
- An eccentric portion 13b of the rotating shaft 13 is disposed in the cylinder chamber 22b, and a roller 23b is fitted around the eccentric portion 13b.
- the rollers 23a and 23b in the cylinder chambers 22a and 22b rotate eccentrically, respectively. Due to this eccentric rotation, the outer peripheral surfaces of the rollers 23a and 23b are displaced while making line contact with the inner peripheral surfaces of the cylinder chambers 22a and 22b. The tips of the first and second blades that move forward in accordance with the rotation of the rollers 23a and 23b are in contact with the outer peripheral surfaces of the rollers 23a and 23b.
- the cylinder chamber 22a is divided into a compression side space and a suction side space.
- the cylinder chamber 22b is divided into a compression side space and a suction side space by the contact of the second blade.
- the low-pressure gas refrigerant passed through the gas-liquid separator 6 is sucked into the cylinder chambers 22a and 22b through the refrigerant suction pipes 9a and 9b, and is compressed in the cylinder chambers 22a and 22b.
- the compressed and high-pressure gas refrigerant is discharged from the compressor unit 11 into the sealed container 10.
- the released gas refrigerant flows upward to the electric motor unit 12 side.
- the rotor 15 of the electric motor unit 12 has an insertion hole 15a for inserting the rotating shaft 13, and a plurality of refrigerant passages (first passages) 14a around the insertion hole 15a. These refrigerant passages 14 a penetrate the rotor 15 along the axial direction thereof, and are arranged at predetermined intervals along the circumferential direction of the rotor 15.
- a plurality of refrigerant / oil passages (second passages) 14 b are arranged between the stator 16 of the motor unit 12 and the inner peripheral surface of the sealed container 10 and along the axial direction of the rotor 15. These refrigerant / oil passages 14 b are formed at predetermined intervals along the circumferential direction of the stator 16.
- the gas refrigerant discharged from the compressor unit 11 rises through the plurality of refrigerant passages 14 a and the plurality of refrigerant / oil passages 14 b of the electric motor unit 12 and rises through the gap between the rotor 15 and the stator 16. To do. In this way, the gas refrigerant that has passed through the electric motor unit 12 fills the space above the electric motor unit 12. The filled gas refrigerant flows out to the refrigeration cycle through the discharge port 10a.
- the oil separation unit 200 is disposed between the electric motor unit 12 in the hermetic container 10 and the discharge port 10a.
- the oil separation unit 200 separates the lubricating oil 100 mixed in the gas refrigerant discharged from the discharge port 10a (the gas refrigerant flowing in the upper space of the electric motor unit 12) in the sealed container 10.
- the separated lubricating oil 100 is guided to a plurality of refrigerant / oil passages 14 b between the stator 16 and the inner peripheral surface of the sealed container 10.
- the guided lubricating oil 100 descends through each refrigerant / oil passage 14 b and returns to the oil reservoir at the inner bottom of the sealed container 10.
- the oil separation unit 200 includes a rotating member (first rotating member) 30, a rotating member (second rotating member) 40, and an elastic member such as a corrugated washer 50, as shown in FIG.
- the rotating member 30 has a circular opening (first opening) 31a at one end and a circular opening (second opening) 34a at the other end, and the flange 32 is integrated with the periphery of the opening 31a by drawing.
- This is a molded cylinder.
- the material of the rotating member 30 and the flange 32 is, for example, a thin SPPC (cold rolled steel plate) material, and does not need to have a spring property.
- the rotary member 30 is formed by bending a large diameter portion (first large diameter portion) 31, a step portion (first step portion) 33, and a small diameter portion (first small diameter portion) 34 in this order. is there.
- the large-diameter portion 31 has a predetermined length in the axial direction, and has the opening 31a and the flange 32 at the upper end edge.
- the inner diameter ⁇ Da of the large-diameter portion 31 is the diameter of the opening 31a.
- the small diameter portion 34 is smaller in diameter than the large diameter portion 31 and has a predetermined length in the axial direction, and has the opening 34a at the lower end edge.
- the lower end edge of the small diameter portion 34 is bent toward the inner diameter side, and an opening 34a exists inside the bent portion.
- the diameter ⁇ Db of the opening 34 a is smaller than the inner diameter of the small diameter portion 34.
- the step portion 33 is a plane (also referred to as a horizontal plane) existing between the large diameter portion 31 and the small diameter
- the flange 32 expands in the radial direction of the large-diameter portion 31, and the lower surface faces the upper end of the rotor 15.
- the lower surface receives the gas refrigerant flowing out from each refrigerant passage 14 a and the gap between the rotor 15 and the stator 16. .
- the outer edge portion 32a of the flange 32 is bent downward. By bending the outer edge portion 32a, the gas refrigerant rising from below can be reliably and efficiently received on the lower surface of the flange 32.
- the outer diameter of the flange 32 is the same as or smaller than the diameter of the rotor 15. Even with this outer diameter, the gas refrigerant rising from below can be reliably and efficiently received. That is, by suppressing the outer diameter of the flange 32 to be the same as or less than the diameter of the rotor 15, the oil separation unit 200 can be reduced in size and the work for assembling the oil separation unit 200 is facilitated.
- the rotating member 40 is a cylindrical body having a circular opening (third opening) 45a at one end and a circular opening (fourth opening) 41a at the other end.
- the material of the rotating member 40 is, for example, a thin SK5 (carbon tool steel) material having a spring property.
- the rotating member 40 is inserted coaxially into the opening 31 a of the rotating member 30, and the end (the other end) on the opening 41 a side protrudes from the opening 34 a of the rotating member 30. This protrusion is engaged with the rotor 15 as will be described later.
- the rotating member 40 transmits the rotation of the rotor 15 to the rotating member 30 while holding the rotor 15 slidable from the inside by the insertion and the engagement.
- the rotating member 40 is formed by bending a large diameter portion (second large diameter portion) 45, a step portion (second step portion) 42, and a small diameter portion (second small diameter portion) 41 in order. is there.
- the large diameter portion 45 has a predetermined length in the axial direction and has the opening 45a.
- the outer diameter ⁇ Dd of the large diameter portion 45 is slightly smaller than the inner diameter (diameter of the opening 31a) ⁇ Da of the large diameter portion 31 of the rotating member 30 ( ⁇ Dd ⁇ Da).
- the small diameter portion 41 is smaller in diameter than the large diameter portion 45 and has a predetermined length in the axial direction, and has the opening 41a.
- the outer diameter ⁇ Dc of the small diameter portion 41 is slightly smaller than the diameter ⁇ Db of the small diameter portion 34 in the rotating member 30 ( ⁇ Dc ⁇ Db).
- the step portion 42 is a plane (also referred to as a horizontal plane) existing between the large diameter portion 45 and the small diameter portion 41.
- the large-diameter portion 45 fits in the large-diameter portion 31 in a fitted state
- the small-diameter portion 41 fits in the small-diameter portion 34 in a fitted state
- the step portion 42 faces the step portion 33.
- the corrugated washer 50 is an annular plate formed in a corrugated shape.
- FIG. 4 shows a plan view configuration viewed in the axial direction, and FIG.
- the corrugated washer 50 is placed on the step portion 33 in the rotating member 30 in advance when the rotating member 40 is inserted into the rotating member 30.
- the corrugated washer 50 is sandwiched between the stepped portions 33 and 42 facing each other.
- the corrugated washer 50 has elasticity that resists the insertion of the rotating member 40 and biases the rotating members 30 and 40 in a direction in which they are separated from each other along the axial direction thereof.
- the outer diameter ⁇ Dx of the corrugated washer 50 is smaller than the outer diameter ⁇ Dd of the large diameter portion 45 of the rotating member 40.
- the inner diameter ⁇ Dy of the corrugated washer 50 is larger than the outer diameter ⁇ Dc of the small diameter portion 41 of the rotating member 40.
- the movable range of the wave washer 50 corresponds to the movable range of the rotating member 30 with respect to the rotating member 40.
- the inner diameter ⁇ Dy of the corrugated washer 50 is larger than the outer diameter ⁇ Dc of the small-diameter portion 41 of the rotating member 40, the small-diameter portion 41 of the rotating member 40 easily passes inside the corrugated washer 50 when the rotating member 40 is inserted into the rotating member 30. To do.
- one locking portion 36 is formed in a part of the small diameter portion 34 in the rotating member 30.
- the locking portion 36 is depressed on the outer peripheral surface side of the small diameter portion 34 and protrudes in the inner diameter direction on the inner peripheral surface side of the small diameter portion 34.
- a locking portion 46 is formed on a part of the outer peripheral surface of the large diameter portion 45 in the rotating member 40. The locking portion 46 is depressed on the outer peripheral surface side of the large diameter portion 45 and protrudes in the inner diameter direction on the inner peripheral surface side of the large diameter portion 45.
- the position of the locking portion 46 of the large diameter portion 45 of the rotating member 40 is matched with the position of the locking portion 36 of the large diameter portion 31 of the rotating member 30.
- the large-diameter portion 31 of the rotating member 30 is inserted into the engaging portion 46 on the outer peripheral surface of the large-diameter portion 45 of the rotating member 40.
- the engaging portion 36 on the inner peripheral surface enters. Thereby, the rotation member 40 and the rotation member 30 are mutually latched in the circumferential direction.
- the rotating member 30 is provided with a mark that allows the operator to easily visually recognize the position of the locking portion 36.
- the rotating member 40 is provided with a mark that allows the operator to easily visually recognize the position of the locking portion 46. The presence of these marks facilitates the alignment between the rotating member 40 and the rotating member 30.
- a plurality of, for example, three engaging claws 44 are formed at equal intervals along the circumferential direction on the outer peripheral surface of the small-diameter portion 41 of the rotating member 40. These engaging claws 44 are rectangular and are cut and raised so that the lower part is connected to the small diameter part 41 and the upper part is opened outward from the small diameter part 41.
- each engaging claw 44 When the rotating member 40 is inserted into the rotating member 30, each engaging claw 44 is elastically deformed inward while being in sliding contact with the inner peripheral surface of the opening 34a of the rotating member 30, and the outer peripheral surface of the small-diameter portion 41 within the opening 34a. And it becomes almost the same state.
- each engaging claw 44 passes through the opening 34a.
- Each engaging claw 44 that has passed through the opening 34a is elastically restored and opened. As shown in FIG. 3, each of the opened engaging claws 44 engages with the periphery of the opening 34a. This engagement restricts the separation of the rotating members 30 and 40 due to the elasticity of the wave washer 50.
- the assembly of the oil separation unit 200 is completed by placing the wave washer 50 on the stepped portion 33 in the rotating member 30 and inserting the rotating member 40 into the rotating member 30 in this state.
- the oil separation unit 200 that has been assembled is attached to the upper part of the electric motor unit 12 as shown in FIG.
- the axial length of the small diameter portion 41 of the rotating member 40 is made longer than that shown in FIGS.
- the diameter of the upper part 13 c of the rotating shaft 13 is slightly smaller than the diameter of the insertion hole 15 a in the rotor 15. As a result, a space for accommodating the rotating member 40 is secured between the upper portion 13c of the rotating shaft 13 and the upper inner peripheral surface of the insertion hole 15a.
- a plurality of, for example, three engagement notches 27 are formed at equal intervals along the circumferential direction at a position corresponding to the upper edge of the insertion hole 15a in the rotor 15. These engagement notches 27 have the same rectangular shape as each of the engagement claws 44, and the width dimension in the radial direction is slightly larger than the width dimension of each engagement claw 44.
- the tip of the rotating member 40 (the end of the small diameter portion 41 on the opening 41a side) is inserted into the accommodation gap of the insertion hole 15a. With this insertion, the upper portion 13 c of the rotating shaft 13 enters the opening 41 a of the small diameter portion 41, and the upper portion 13 c is accommodated in the small diameter portion 41.
- the tip of the rotating member 30 (the end on the opening 34 side of the small diameter portion 34) abuts on the upper end of the rotor 15 (the upper surface of an end plate 15d described later).
- the rotor 15 is obtained by laminating a large number of iron plates in the axial direction, and has annular end plates 15d at the upper and lower ends in the axial direction. Further, the rotor 15 has one or more balance weights 25 and a plurality of rivets 15e. Each balance weight 25 is arranged on the end plate 15d on the upper end side. Each rivet 15 e is inserted in the axial direction of the rotor 15 to fix each end plate 15 d together with each balance weight 25.
- the end plate 15d on the upper end side of the rotor 15 closes each engagement notch 27 located at the upper edge of the insertion hole 15a. Further, as described above, a plurality of refrigerant passages 14 a exist around the insertion hole 15 a in the rotor 15.
- each engagement claw 44 is matched with the position of each engagement notch 27 in the insertion hole 15a.
- the small-diameter portion 41 is pushed into the accommodating gap.
- Each engaging claw 44 is elastically deformed inward while sliding on the inner edge of the end plate 15d and the inner peripheral surface of the insertion hole 15a as the rotating member 40 is pushed.
- Each engaging claw 44 is separated from the tip of the rotating member 30 (the end of the small diameter portion 34 on the opening 34 side) when the small diameter portion 41 is further pushed in, and elastic at a position corresponding to each engaging notch 27. Return and open.
- Each of the opened engaging claws 44 is accommodated in each of the engaging notches 27, and the upper edge is in contact with the lower surface of the end plate 15d. Thereby, the installation of the oil separation unit 200 is completed.
- the lower surface of the flange 32 in the oil separation unit 200 faces each refrigerant passage 14a with a predetermined interval.
- the height position of the flange 32 is higher than the position of the coil end portion 16 a of the stator 16.
- the motor unit 12 When the motor unit 12 operates, the rotor 15 rotates, and the rotating member 40 also rotates with the rotation. The rotation of the rotating member 40 is transmitted to the rotating member 30. Thereby, the flange 32 rotates.
- the gas refrigerant discharged from the compressor unit 11 rises through the refrigerant passages 14 a, the refrigerant / oil passages 14 b, the gaps between the rotor 15 and the stator 16, and the like.
- Lubricating oil 100 is mixed in the rising gas refrigerant.
- the gas refrigerant that flows upward from each refrigerant passage 14a or the gap between the rotor 15 and the stator 16 strikes (impacts) the lower surface of the flange 32.
- the gas refrigerant that has hit the lower surface of the flange 32 flows laterally along the lower surface of the flange 32, and hits the coil end portion 16 a and the inner peripheral surface of the sealed container 10.
- the lubricating oil 100 mixed in the gas refrigerant adheres to the inner peripheral surface of the coil end portion 16 a and the sealed container 10.
- the lubricating oil 100 is separated from the gas refrigerant.
- the separated lubricating oil 100 drips down and flows into each refrigerant / oil passage 14b.
- the inflowing lubricating oil 100 returns to the oil reservoir at the inner bottom of the sealed container 10 through each refrigerant / oil passage 14b.
- the gas refrigerant after the lubricating oil 100 is separated fills the upper space of the oil separation unit 200.
- the gas refrigerant filling the upper space of the oil separation unit 200 flows out to the refrigeration cycle through the discharge port 10a.
- the configuration in which the lubricating oil 100 mixed in the gas refrigerant is separated by the oil separation unit 200 and returned to the inner bottom portion of the sealed container 10 can reduce the amount of the lubricating oil 100 flowing out from the discharge port 10a together with the gas refrigerant. it can. Thereby, lack of lubricating oil in the airtight container 10 can be prevented. Therefore, the good lubricity of the mechanical sliding part in the compressor part 11 and the electric motor part 12 can be maintained.
- the corrugated washer 50 is disposed inside the rotating member 30, there is no member that obstructs the flow of the gas refrigerant between the motor unit 12 and the flange 32. Thereby, the flow of the gas refrigerant becomes smooth, the discharge efficiency of the gas refrigerant is improved, and the separation efficiency of the lubricating oil 100 is improved.
- the main body of the oil separation unit 200 is configured by the combination of the two rotating members 30 and 40, the drawing depth of the drawing of each part of the rotating members 30 and 40 can be reduced. The workability of the drawing process is improved, and the manufacturing cost can be reduced.
- the material cost can be reduced and the workability of the rotating member 30 is improved. In this respect, the manufacturing cost can be reduced.
- the oil separation unit 200 can be reduced in size and the assembly work of the oil separation unit 200 is facilitated.
- the circumferential surfaces of the large-diameter portion 31 and the small-diameter portion 34 of the rotating member 30 are surfaces parallel to the central axis of the rotating member 30, and the surfaces of the flange 32 and the stepped portion 33 are orthogonal to the central axis of the rotating member 30. That is, since there is no surface inclined with respect to the central axis in the rotating member 30, the rotating member 30 can be formed with high dimensional accuracy even if the molding die is inexpensive.
- the circumferential surfaces of the large-diameter portion 45 and the small-diameter portion 41 of the rotating member 40 are surfaces parallel to the central axis of the rotating member 40, and the surface of the stepped portion 42 is perpendicular to the central axis of the rotating member 40.
- the rotating member 40 since the rotating member 40 has no surface inclined with respect to the central axis, the rotating member 40 can be formed with high dimensional accuracy even if the molding die is inexpensive.
- the rotary members 30 and 40 can freely slide with each other, it is possible to employ a wave washer 50 having a large movable range. That is, the engaging action and the fixing action by the elasticity of the wave washer 50 can be set to an optimum state.
- the movable range of the corrugated washer 50 is set to be three times or more the plate thickness t, the tip of the rotating member 40 (the end on the opening 41a side of the small diameter portion 41) is inserted into the accommodation gap of the insertion hole 15a. In doing so, each of the engaging claws 44 can reliably get over the thickness of the end plate 15d. That is, the oil separation unit 200 can be securely attached. Even if the two corrugated washers 50 are mistakenly arranged at the time of assembly, the respective engaging claws 44 can reliably get over the thickness of the end plate 15d.
- the corrugated washer 50 is used as the elastic member.
- the invention is not limited thereto, and a coil spring, for example, may be used as the elastic member.
- each refrigerant passage 14a is not essential. Even without the refrigerant passages 14a, the gas refrigerant rises through the gaps between the rotor 15 and the stator 16, the refrigerant / oil passages 14b, and the like.
- a coil spring 51 is used as an elastic member disposed between the rotating members 30 and 40.
- Other configurations are the same as those of the first embodiment. Therefore, the description is omitted.
- the coil spring 51 expands and contracts according to the flow rate of the gas refrigerant hitting the lower surface of the flange 32.
- the coil spring 51 expands in the axial direction with the elastic force (biasing force) prevailing over the pressure of the gas refrigerant, and rotates the rotating member 30. Press against the end plate 15 d of the child 15.
- the coil spring 51 loses the elastic force against the pressure of the gas refrigerant and contracts in the axial direction, thereby separating the rotating member 30 from the rotor 15. .
- the flow rate of the gas refrigerant that flows out from the gaps between the respective refrigerant passages 14a and the rotor 15 and the stator 16 and hits the lower surface of the flange 32 becomes slow.
- the coil spring 51 extends as shown in FIG. By this extension, the flange 32 is displaced downward, and the gap between the flange 32 and the upper end of the rotor 15 is narrowed.
- the flange 32 moves up and down according to the flow rate of the gas refrigerant, so that the lubricating oil 100 mixed in the gas refrigerant can be efficiently separated without impairing the pressure of the gas refrigerant reaching the discharge port 10a. Since other effects are the same as those of the first embodiment, description thereof is omitted.
- the hermetic compressor and refrigeration cycle apparatus of the present invention can be used for an air conditioner.
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Abstract
Description
以下、第1実施形態を図面に基づいて説明する。
図1は、空気調和機等に搭載される冷凍サイクル1を示す。冷凍サイクル1は、密閉型圧縮機2と、熱源側熱交換器である室外熱交換器3と、膨張弁(膨張装置)4と、利用側熱交換器である室内熱交換器5と、気液分離器6とを、冷媒管7を介して連通することにより構成される。冷媒管7は、密閉型圧縮機2の上部に接続される冷媒吐出管8、および密閉容器10の下部に接続される冷媒吸込管9a,9bを含む。
密閉型圧縮機2は、密閉容器10を有する。密閉容器10は、圧縮機部11および電動機部12を潤滑油100と共に収容するとともに、上部に吐出口10aを有する。この吐出口10aに上記冷媒吐出管8が接続される。潤滑油100は、圧縮機部11および電動機部12における機械的な摺動部分へ供給され、その摺動部分の潤滑性を保つ。
第2実施形態の要部を図7および図8に示す。
他の効果は、第1実施形態と同じなので、その説明を省略する。
Claims (12)
- 冷媒を吸込んで圧縮する圧縮機部と、
回転子および固定子を含み、前記圧縮機部を駆動する電動機部と、
前記圧縮機部および前記電動機部を潤滑油と共に収容し、前記圧縮機部で圧縮された冷媒を吐出する密閉容器と、
前記吐出される冷媒に混じる前記潤滑油を前記密閉容器内で分離する油分離ユニットと、
を備え、
前記油分離ユニットは、
フランジを有する第1回転部材と、
前記第1回転部材に挿通されて前記回転子に係合し、その回転子の回転を前記第1回転部材に伝える第2回転部材と、
前記第1回転部材の内側に配置され、前記第2回転部材の挿通に抗する弾性を持つ弾性部材と、
を含む
ことを特徴とする密閉型圧縮機。 - 前記密閉容器は、前記冷媒を吐出するための吐出口を上部に有し、前記圧縮機部を前記潤滑油と共に下部に収容し、前記電動機部を前記吐出口と前記圧縮機部との間に収容し、前記油分離ユニットを前記吐出口と前記電動機部との間に収容する、
ことを特徴とする請求項1記載の密閉型圧縮機。 - 前記第1回転部材は、一端および他端に円形の第1開口および第2開口を有し、その第1開口の周縁に前記フランジが一体成形された円筒体である、
前記第2回転部材は、一端および他端に円形の第3開口および第4開口を有し、前記第1回転部材に同軸状に挿通されることにより前記第4開口側の端部が前記第1回転部材から突出して前記回転子に係合される円筒体であって、その挿通および係合により、前記第1回転部材をその内側から摺動自在に保持しつつ前記回転子の回転を前記第1回転部材に伝える、
ことを特徴とする請求項2記載の密閉型圧縮機。 - 前記第1回転部材は、前記第1開口を有する第1大径部と、前記第2開口を有する第1小径部と、前記第1大径部と前記第1小径部との間に存する第1段部と、を含む、
前記第2回転部材は、前記第3開口を有し且つ前記第1大径部の内径φDaより小さい外径φDd(<φDa)を有する第2大径部と、前記第4開口を有し且つ前記第2開口の直径φDbより小さい外径φDc(<φDb)を有する第2小径部と、前記第2大径部と前記第2小径部との間に存する第2段部とを含み、前記第1回転部材への前記挿通により、前記第2大径部が前記第1大径部に収まり、前記第2小径部が前記第1小径部に収まり、前記第2段部が前記第1段部と対向する、
前記弾性部材は、前記第1段部と前記第2段部との間に配置される、
ことを特徴とする請求項3記載の密閉型圧縮機。 - 前記弾性部材は、環状の板体を波形に形成した波形ワッシャである、
前記波形ワッシャの外径φDxは、前記第2大径部の外径φDdより小さい、
前記波形ワッシャの内径φDyは、前記第2小径部の外径φDcより大きい、
前記波形ワッシャの軸方向における可動域の長さは、同波形ワッシャの軸方向の高さHと同波形ワッシャの板厚Tとの差(=H-T)であり、かつその板厚Tの3倍以上である、
ことを特徴とする請求項4記載の密閉型圧縮機。 - 前記電動機部は、前記回転子に挿通されて同回転子の回転を前記圧縮機部に伝える回転軸を含む、
前記回転子は、前記回転軸の挿通用孔を軸心部分に有する、
前記回転軸は、上部の径が前記挿通用孔の径よりも小さい、
前記第1小径部は、前記挿通用孔の径よりも大きい外径を有し、前記第2開口側の端部が前記電動機部の上端に当接する、
前記第2小径部は、前記回転軸の上部の径より大きい内径を有し、かつ前記挿通用孔の径より小さい外径を有し、前記第4開口側の端部が前記第1小径部の前記第2開口から突出して前記挿通用孔の内周面に係合する、
ことを特徴とする請求項4記載の密閉型圧縮機。 - 前記挿通用孔は、1つまたは複数の係合用切欠きを当該内周面に有する、
前記第2小径部は、前記係合用切欠きに嵌まり込む1つまたは複数の係合用爪を当該外周面に有する、
ことを特徴とする請求項6記載の密閉型圧縮機。 - 前記電動機部は、前記圧縮機部から放出された冷媒が上昇して通る1つまたは複数の第1通路を有するとともに、前記油分離ユニットにより分離された潤滑油が下降して通る1つまたは複数の第2通路を有する、
ことを特徴とする請求項2記載の密閉型圧縮機。 - 前記第1通路は、前記電動機部の回転子を同回転子の軸方向に沿って貫通する複数の冷媒通路、前記回転子と前記固定子との隙間、および前記固定子と前記密閉容器の内周面との間にかつ前記回転子の軸方向に沿って配置された複数の冷媒/油通路、を含む、
前記第2通路は、少なくとも前記冷媒/油通路を含む、
ことを特徴とする請求項8記載の密閉型圧縮機。 - 前記フランジは、前記電動機部の回転子の径方向に拡がって当該下面が前記電動機部の上端に対向し、前記第1通路から流出する冷媒を受ける、
ことを特徴とする請求項8記載の密閉型圧縮機。 - 前記弾性部材は、前記フランジの下面に当たる冷媒の流速が所定値未満の場合はその冷媒の圧力に当該弾性力が勝って前記第1回転部材を前記電動機部の上端に押し当て、前記フランジの下面に当たる冷媒の流速が前記所定値以上の場合はその冷媒の圧力に当該弾性力が負けて前記第1回転部材を前記電動機部の上端から離間させる、
ことを特徴とする請求項3記載の密閉型圧縮機。 - 請求項1乃至請求項11のいずれかに記載の密閉型圧縮機と、凝縮器と、膨張装置と、蒸発器とを冷媒管により連通して構成された冷凍サイクル、
を備えることを特徴とする冷凍サイクル装置。
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