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
  • F04B39/06—Cooling; Heating; Prevention of freezing
• • 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
• • 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
  • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
  • F04B39/121—Casings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
  • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
  • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
  • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
  • F04C29/04—Heating; Cooling; Heat insulation
  • F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2210/00—Working fluid
  • F05B2210/10—Kind or type
  • F05B2210/12—Kind or type gaseous, i.e. compressible
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2240/00—Components
  • F05B2240/10—Stators

Definitions

• the present invention relates to a compressor, and particularly to a countermeasure for cooling an electric motor.
• a compressor for example, it is disclosed in Japanese Patent Application Laid-Open No. Hei 5-164609, Japanese Patent Application Laid-Open No. Hei 10-22381 or Japanese Patent Application Laid-Open No. Hei 2-1698987.
• an electric compressor in which a compression mechanism and a motor for driving the compression mechanism are housed in a closed casing is known.
• This type of compressor is connected to a refrigerant circuit of a refrigerating device or the like and is used to compress refrigerant gas.
• the compression mechanism includes a fixed scroll and a movable scroll, and the fixed scroll is fixed to the casing through a housing.
• the motor includes a stator fixed to the casing, a rotor rotatably disposed inside the stator, and a drive shaft fixed to the rotor.
• the compression mechanism is driven by rotating the drive shaft by the rotation of the rotor.
• the stator of the motor has a part of the outer peripheral surface cut off, and a gap is formed between the casing and the stator. The refrigerant gas compressed by the compression mechanism flows through the gap, thereby cooling the electric motor.
• the conventional one does not actively control the flow of the refrigerant gas in the casing. For this reason, the refrigerant gas flows through the casing as soon as possible, and is discharged through the discharge pipe. At this time, since the refrigerant gas has a property of flowing in a direction with less resistance, the refrigerant gas does not always flow evenly in the gap, and the flow of the refrigerant gas may be uneven. Therefore, although the conventional motor can cool the electric motor by the refrigerant gas, there is a problem that the electric motor cannot be efficiently cooled.
• a part of the refrigerant gas discharged from the compression mechanism has a gap around the stator. Since the gas is discharged from the discharge pipe without passing through the gas, there is also a problem that the cooling of the motor by the refrigerant gas cannot be effectively performed.
• the present invention has been made in view of such a point, and a purpose thereof is to efficiently cool an electric motor.
• the present invention provides a method for causing gas discharged from a compression mechanism (22) to flow from one of a gap (39a, 39b) of an electric motor (24) and a gas passage (40) to the other. It was made.
• a compression mechanism (22) and an electric motor (24) for driving the compressor mechanism (22) are housed in a casing (11), and the casing (11) includes: Assuming that the compressor is located between the compression mechanism (22) and the electric motor (24) and to which the discharge pipe (18) is connected, between the stator (33) of the electric motor (24) and the casing (11).
• a gas passage (40) is formed at both ends of the electric motor (24) and communicates with gaps (39a, 39b) extending at both ends of the electric motor (24). The generated gas flows from one of the gaps (39a, 39b) and the gas passage (40) across both ends in the electric motor (24) to the other, and flows to the discharge pipe (18).
• a compression mechanism (22) and an electric motor (24) for driving the compression mechanism (22) are housed in a casing (11), and the compression mechanism (22) is contained in the casing (11).
• the compressor is located between the motor (24) and the discharge pipe (18)
• the first housing space (13) of the compression mechanism (22) and the motor The partition member (21) partitioned into the second storage space (14) and the partition member (21), and the gas discharged from the compression mechanism (22) is supplied to the second storage space (14).
• the motor (24) is formed between the stator (33) of the electric motor (24) and the casing (11), and is formed at both ends of the electric motor (24).
• the gas passage (40) communicating with the gaps (39a, 39b) across both ends of the And a partition member (42) for communicating the other end of the pump (39a, 39b) and the discharge space (16) communicating with the discharge pipe (18) with the other end of the gas passage (40). ing.
• the partition member (42) is formed between the partition member (21) and the stator (33) of the electric motor (24).
• the partition member (42) is a partition member.
• (21) is integrally formed.
• the partition member (42) is integrated with the iron core (35) of the stator (33) of the electric motor (24) and is more axially than the coil (36). It is formed in a protruding cylindrical shape.
• the partition member (42) is formed by stacking annular steel plates (42a).
• the partition member (42) is constituted by a cylindrical member fitted between the partition member (21) and the stator (33) of the electric motor (24). Have been.
• the outlet of the communication passage (26) opens toward the coil (36) of the stator (33).
• the outer peripheral surface of the stator (33) is in close contact with the casing (11), while the gas passage (40) is fixed.
• the vertical groove (35d) is provided in a plurality in the circumferential direction, and the discharge pipe (18) is formed in the circumferential direction with respect to a position where the vertical groove (35d) is formed. It is out of position.
• the discharge pipe (18) is provided with respect to a drive shaft (23) of the electric motor (24). It is provided on the opposite side of the vertical groove (35d).
• a twenty-second invention is the invention according to any one of the second to eighth inventions, wherein the electric motor (2
• the stator (33) of 4) is indirectly attached to the casing (11) through the partition member (21), and the gas passage (40) is provided in the entire circumferential direction of the stator (33). Is formed over the gap.
• the discharge space (16) is larger than the outlet of the gas passage (40).
• a fifteenth invention is the invention according to any one of the first to thirteenth inventions, wherein the stator (33) of the electric motor (24) is provided with each tooth portion of the iron core (35) of the stator (33). A coil (36) is individually wound for each 35b).
• the gas discharged from the compression mechanism (22) flows into one of the gear gaps (39a, 39b) and the gas passage (40) of the electric motor (24).
• the gas cools the motor (24).
• the gas flowing out of one of the gap (39a, 39b) or the gas passage (40) flows into the other of the gap (39a, 39b) or the gas passage (40).
• the gas cools the motor (24).
• This gas is discharged to the outside of the casing (11) through the discharge pipe (18). That is, the flow direction of the gas is regulated so that the gas flows from one of the gap (39a, 39b) and the gas passage (40) to the other. Therefore, the gas flows smoothly through the casing (11) to cool the motor (24).
• the gas discharged from the compression mechanism (22) flows to the second storage space (14) through the communication passage (26).
• this gas flows out of the communication passage (26), it flows into the gaps (39a, 39b) of the electric motor (24).
• This gas cools the motor (24) as it flows through the gap (39a, 39b).
• the gas flowing out of the gaps (39a, 39b) then flows into the gas passage (40).
• This gas cools the electric motor (24) as it flows through the gas passage (40).
• the gas flowing out of the gas passage (40) passes through the discharge space (16), and is discharged outside the casing (11) through the discharge pipe (18).
• the gas flowing out of the communication passage (26) flows toward the coil (36) of the stator (33).
• this gas contains oil
• the oil is trapped by the coil (36) and becomes droplets.
• the stator (33) of the electric motor (24) is fixed to the casing (11).
• gas flows through a gas passage (40) formed between the vertical groove (35d) on the outer peripheral surface of the stator (33) and the casing (11).
• the gas flows through the gas passages (40) of the stator (33) provided at a plurality of locations in the circumferential direction.
• the gas flowing out of the gas passage (40) is discharged to the outside of the casing (11) through the discharge pipe (18) after changing the flowing direction to the circumferential direction.
• the gas flows through the gas passage (40) of the stator (33) formed at one location in the circumferential direction, and then changes the flow direction in the circumferential direction. Then, this gas is discharged to the casing (11) through a discharge pipe (18) located on the opposite side of the drive shaft (23) of the electric motor (24).
• stator (33) is indirectly attached to the casing ( ⁇ ) via the partition member (21), and the stator (33) is provided on the outer periphery of the stator (33).
• a gap is formed over the entire circumference. The gap forms a gas passage (40), and the gas discharged from the compression mechanism (22) flows through the gas passage (40).
• the gas flowing out of the gas passage (40) of the stator (33) flows into the discharge space (16).
• the discharge space (16) is larger than the outlet of the gas passage (40)
• the flow velocity of the gas flowing out of the gas passage (40) decreases.
• the gas whose flow velocity has decreased is discharged outside the casing (11) through the discharge pipe (18).
• the coil (36) of the stator (33) is individually wound around each tooth (35b) of the iron core (35) of the stator (33). For this reason, a gap (39b) is also formed between adjacent teeth (35b). The gas therefore flows through the gap (39b) between the teeth (35b) and the gap (39a) between the stator (33) and the rotor (34).
• the gas discharged from the compression mechanism (22) can be circulated through both the gap (39a, 39b) and the gas passage (40). At this time, since the direction in which the gas flows is regulated, the entire amount of the gas can be smoothly circulated inside and outside the electric motor (24). As a result, the motor (24) can be efficiently cooled by the gas.
• the entire amount of gas discharged from the compression mechanism (22) is electrically operated. It can be reliably flowed into the gaps (39a, 39b) inside the machine (24). Then, the gas flowing out of the gaps (39a, 39b) can be surely circulated through the gas passage (40) and then discharged out of the casing (11). As a result, the electric motor (24) can be efficiently cooled by the gas discharged from the compression mechanism (22). Furthermore, since the gas flow path from the compression mechanism (22) to the discharge pipe (18) can be made long, if the gas contains oil, this oil can be separated more.
• the partition member (42) is formed between the partition member (21) and the stator (33) of the electric motor (24).
• the flow of gas flowing into the motor (24) can be reliably regulated.
• the electric motor in the partition member (21) is used for the partition member (42).
• the space between the partition member (21) and the stator (33) can be formed without adding any additional force to the stator (33) of the electric motor (24). Can be reliably separated.
• the partition member (42) is formed integrally with the iron core (35) of the stator (33), and the partition member (42) projects more in the axial direction than the coil (36).
• the partition member (42) can be sandwiched between the partition member (21) and the iron core (35) of the stator (33), whereby the partition member (21) and the stator (33) Between the spaces can be reliably partitioned.
• the partition wall member (42) is formed by laminating the annular steel plates (42a), so that the partition member (21) is not subjected to any additional processing.
• the space between the partition member (21) and the stator (33) of the electric motor (24) can be reliably partitioned by a simple method of merely stacking (42a).
• the partition member (42) is constituted by the member fitted between the partition member (21) and the stator (33) of the electric motor (24).
• the space between the partition member (21) and the stator (33) can be reliably partitioned without newly processing the stator (33).
• the gas flowing out of the communication passage (26) is caused to flow toward the coil (36) of the stator (33), so that the oil contained in the gas is removed from the coil (36). Can be trapped and turned into droplets. This allows gas Oil can be efficiently separated from the oil, and the discharge of the oil along with the gas discharged from the discharge pipe (18) can be suppressed.
• the stator (33) of the electric motor (24) is fixed to the casing (11), while the stator (33) is provided with the vertical groove (35d), thereby forming the gas passage (40). Since it is formed, the gas can be reliably circulated outside the stator (33) while improving the support rigidity of the electric motor (24).
• the motor (24) can be cooled efficiently from multiple directions outside the stator (33), and the gas from the compression mechanism (22) to the discharge pipe (18) can be cooled efficiently. Since the circulation route can be long, if the gas contains oil, it is possible to separate more oil.
• the discharge pipe (18) is mounted on the side opposite to the gas passage (40), so that the gas flow path from the discharge pipe (18) to the discharge pipe is formed. It can take as long as possible and if the gas contains oil, this oil can be separated more.
• the stator (33) is indirectly attached to the casing (11) via the partition member (21), and gas is spread over the entire outer periphery of the stator (33). Since the motor is distributed, the motor (24) can be cooled with higher efficiency while reliably supporting the motor (24).
• the gas flow velocity is reduced before flowing into the discharge pipe (18), when the gas contains oil, the oil is transferred to the discharge pipe (18). More separation can be done before entering.
• the coil (36) of the stator (33) is individually wound around each tooth (35b) of the iron core (35). Gap (39a 5 39b) can be made wider. As a result, gas can efficiently and reliably flow into the gaps (39a, 39b), and the cooling efficiency of the electric motor (24) can be improved.
• FIG. 1 is a cross-sectional view illustrating an overall configuration of a compressor according to Embodiment 1 of the present invention.
• FIG. 2 is a cross-sectional view illustrating a configuration of a stator of the electric motor according to Embodiment 1 of the present invention.
• FIG. 3 is a cross-sectional view taken along the line III-III of FIG.
• FIG. 4 is a cross-sectional view illustrating an overall configuration of a compressor according to Embodiment 2 of the present invention.
• FIG. 5 is a cross-sectional view illustrating an overall configuration of a compressor according to Embodiment 3 of the present invention.
• FIG. 6 is a cross-sectional view illustrating an overall configuration of a compressor according to Embodiment 4 of the present invention.
• FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
• the first embodiment of the present invention relates to a scroll type compressor which is connected to a refrigerant circuit (not shown) of a refrigeration system for performing a vapor compression refrigeration cycle and is used to compress refrigerant gas. Applied.
• the compressor (10) has a casing (11) composed of a pressure vessel, and the casing (11) is fixed to the casing (11).
• Frame (21) as a divided member, a scroll-type compression mechanism (22) attached to the upper end of the frame (21), and a drive shaft (23) are provided.
• the arranged motor (24) is housed.
• the frame (21) is arranged between the compression mechanism (22) and the electric motor (24).
• the inside of the casing (11) is located above the frame (21), the first storage space (13) in which the compression mechanism (22) is stored, and below the frame (21).
• a second storage space (14) in which the motor (24) is stored.
• the second storage space (14) includes a communication section (15) below the electric motor (24) and a discharge space (16) between the frame (21) and the electric motor (24).
• a suction pipe (17) and a discharge pipe (18) are attached to the casing (11). You.
• the suction pipe (17) passes through the casing (11) and is fitted into the compression mechanism (22).
• the discharge pipe (18) penetrates the casing (11) and has an inner end opening to the discharge space (16).
• the frame (21) is fixed so that the outer peripheral surface of the frame (21) is in close contact with the inner peripheral surface of the casing (11), for example, by being pressed into an upper position of the casing (11). Have been.
• the upper surface of the frame (21) is provided with an upper surface concave portion (21a) formed so that the central portion thereof is recessed downward.
• the outer peripheral surface of the frame (21) is formed with an outer concave portion (21b) that is entirely concave inward in the circumferential direction.
• a disk-shaped flange portion (21c) extending horizontally toward the casing ( ⁇ ) is formed.
• the frame (21) is provided with a bearing portion (21d) below the upper concave portion (21a).
• the bearing (21d) is made of a sliding bearing and rotatably supports one end (upper end) of the drive shaft (23) of the electric motor (24).
• the frame (21) is provided with a communication passage (26) penetrating vertically.
• the communication passage (26) has an inlet opening at the upper end surface of the frame (21) located on the outer peripheral side of the fixed scroll (27) so as to face the first storage space (13).
• the outlet is open at the lower end face of (21c) so as to reach the second storage space (14).
• the discharge pipe (18) penetrates the casing (11) between the motor (24) and the portion where the frame (21) is in close contact with the casing (11).
• the discharge pipe (18) communicates with a discharge space (16) between the casing (11) and the outer peripheral recess (21b) of the frame (21).
• the compression mechanism (22) includes a fixed scroll (27) and a movable scroll (28).
• the fixed scroll (27) is attached to the upper surface of the frame (21) at the periphery thereof and is fixed to the frame (21).
• Each of the scrolls (27, 28) is composed of a head (27a, 28a) and a spiral wrap (27b, 28b) formed on the head (27a, 28a).
• the wraps (27b, 28b) of these scrolls (27, 28) are provided so as to engage with each other.
• the movable scroll (28) is located between the fixed scroll (27) and the frame (21). Is placed. Also, between the end plate (28a) of the orbiting scroll (28) and the frame (21), the Oldham joint or the like is provided so that the orbiting scroll (73) orbits only with respect to the fixed scroll (27). A rotation preventing member (30) is provided.
• a compression chamber (32) is formed between the contact portions of the two wraps (27b, 28b). .
• a discharge hole (27d) for discharging high-pressure refrigerant is formed through the center of the end plate (27a) of the fixed scroll (27).
• the suction pipe (17) is fitted into the end plate (27a) of the fixed scroll (27).
• the inner end of the suction pipe (17) is open to a refrigerant gas suction chamber (27c) formed on the peripheral edge of the wrap (27b).
• a boss (28c) protruding in a cylindrical shape is formed in the center of the lower surface of the end plate (28a) of the movable scroll (28).
• the upper end of the drive shaft (23) is inserted into the boss (28c).
• the upper end of the drive shaft (23) is formed eccentric from the axis of the drive shaft (23).
• the bearing (21d) of the frame (21) supports the drive shaft (23) immediately below the upper end of the drive shaft (23).
• the electric motor (24) is connected to the frame (21) via the drive shaft (23).
• the seal ring (pressed against the lower surface of the end plate (28a) of the orbiting scroll (28)) which is arranged around the boss (28c) and fits with the concave portion (21a) on the upper surface of the frame (21). 31).
• the seal ring (31) By providing the seal ring (31), the high-pressure gas refrigerant flowing into the inside of the upper surface recess (21a) is prevented from leaking to the outer peripheral side of the seal ring (31).
• the movable scroll (28) is pressed against the fixed scroll (27) by the action of the high pressure.
• the electric motor (24) is disposed immediately below the bearing (21d) of the frame (21).
• the electric motor (24) is composed of, for example, a brushless DC motor, and includes a stator (33) and a rotor (34) disposed inside the stator (33).
• the drive shaft (23) is connected to the rotor (34), and is configured to rotate integrally with the rotor (34).
• the stator (33) is composed of a stator core (35) and a coil (36) mounted on the stator core (35).
• Stator core (35) is composed of an annular core body (35a) press-fitted and fixed to the casing (U) and teeth (35b) as teeth formed to protrude inside the core body (35a).
• the stator core (35) is made up of a number of electromagnetic steel sheets (35c) punched out by press working.
• Each of the magnetic steel sheets (35c) is composed of an annular portion forming the iron core body (35a) and a substantially rectangular portion forming the teeth (35b).
• a plurality of teeth (35b) are provided at equal intervals in the circumferential direction, as shown in FIG.
• the tip of each tooth (35b) is formed in an arc shape, and a cylindrical space is formed inside the tip of each tooth (35b).
• the rotor (34) has a configuration in which a permanent magnet (34b) is embedded in a cylindrical rotor core (34a) formed by laminating magnetic steel sheets punched by press working.
• the rotor (34) is disposed so as to form a gap (39a) having a predetermined width between the teeth (35b) and the space formed inside the teeth (35b).
• the stator (33) employs a concentrated winding (direct winding) method as a winding method for the coil (36). That is, the coils (36) are individually wound around the respective teeth (35b) of the stator core (35). A gap (39b) having a predetermined width is formed between the adjacent teeth (35b).
• the gap (39a, 39b) is formed from the upper end to the lower end of the electric motor (24).
• the lower end of the gear gap (39a, 39b) is open to the communication space (15) below the motor (24).
• the core body (35a) of the stator core (35) is provided with a vertical groove (35d) formed by cutting out a part of the outer circumferential surface in the circumferential direction.
• the vertical groove (35d) is arranged just outside the tooth (35b) so as to correspond to the tooth (35b), is formed in a circumferentially elongated shape, and is formed over the entirety in the axial direction. Have been.
• the vertical groove (35d) and the casing (11) form a gas passage (40) through which the refrigerant gas can flow. That is, the gas passage (40) is formed over both ends of the electric motor (24).
• the lower end of the gas passage (40) opens into the communication space (15). As a result, the gas passage (40) communicates with the gap (39a, 39b) at the lower end.
• the discharge pipe (18) is displaced in the circumferential direction with respect to the formation position of the vertical groove (35d). That is, the discharge pipe (18) is disposed directly above the adjacent vertical grooves (35d).
• a partition member (42) is provided in the second storage space (14).
• the partition member (42) is formed in a cylindrical shape, and is arranged so as to connect the flange portion (21c) of the frame (21) and the core body (35a) of the stator core (35). I have. Thereby, the space between the frame (21) and the stator (33) is partitioned into inner and outer spaces.
• the partition wall member (42) does not have a portion constituting the teeth (35b), that is, a predetermined number of annular electromagnetic steel plates (42a) consisting only of the portions constituting the iron core body (35a) are laminated.
• the partition member (42) is formed longer than the length of the coil (36) projecting in the axial direction from the axial end face of the stator core (35). Then, by laminating the predetermined number of the electromagnetic steel sheets (42a) on the laminated body of the electromagnetic steel sheets (35c) constituting the stator core (35), the upper end of the partition wall member (42) becomes a flange of the frame (21). Abuts the lower end of the part (2 lc).
• the outlet of the communication passage (26) of the frame (21) opens, and the upper end of the gap (39a, 39b) opens as the inlet.
• the upper end of the gas passage (40) opens as an outlet, and communicates with the discharge space (16).
• the partition member (42) communicates the communication passage (26) with the upper end of the gap (39a, 39b), and also communicates the discharge space (16) with the gas passage (40).
• the communication space (15) is provided with a bearing plate (44) and an oil reservoir (45).
• the bearing plate (44) is fixed to the casing (11), and is configured to rotatably support the lower end of the drive shaft (23).
• the oil stored in the oil sump (45) passes through the oil passage (not shown) formed in the drive shaft (23) to the sliding parts such as the compressor mechanism (22) and the bearing part (21d). Is supplied.
• the refrigerant gas filling the first storage space (13) is guided to the second storage space (14) through the communication passage (26).
• all the refrigerant gas flowing out of the communication passage (26) flows into the space inside the partition member (42) by the partition member (42) and flows toward the coil (36) of the electric motor (24). . Therefore, a part of the oil contained in the refrigerant gas is captured by the coil (36) and turned into droplets. As a result, the oil that has been turned into droplets is separated from the refrigerant gas. Then, the refrigerant gas flows into the gaps (39a, 39b) of the electric motor (24).
• This refrigerant gas then flows into the gas passage (40) and flows upward.
• the refrigerant gas is cooling the electric motor (24) while flowing through the gas passage (40). That is, while the refrigerant gas flows downward in the gaps (39a, 39b), while the refrigerant gas flows upward in the gas passage (40), the flow direction of the refrigerant gas in the casing (11) is restricted. It will be.
• the refrigerant gas flowing out of the gas passage (40) passes outside the partition member (42) and flows into the discharge space (16). Since the discharge space (16) is larger than the outlet of the gas passage (40), the flow velocity of the refrigerant gas in the discharge space (16) decreases.
• the refrigerant gas is discharged out of the casing ( ⁇ ⁇ ⁇ ⁇ ⁇ ) through the discharge pipe (18).
• the entire amount of the refrigerant gas discharged from the compression mechanism (22) is transferred to both the gap (39a, 39b) and the gas passage (40) of the electric motor (24). Can be distributed. Also, at this time, since the direction of flow of the refrigerant gas is regulated by the partition member (42), it is ensured that the entire amount of the refrigerant gas flowing out of the communication passage (26) flows into the gaps (39a, 39b). it can. As a result, the electric motor (24) can be efficiently cooled by the refrigerant gas.
• the refrigerant gas flows from the gaps (39a, 39b) to the gas passage (40), and the refrigerant gas flowing out of the gas passage (40) is discharged through the discharge pipe (18). ing. Therefore, since the discharge pipe (18) may be provided so that the inner end thereof communicates with the discharge space (16), a simple configuration can be achieved.
• the partition member (42) is made of a predetermined number of electromagnetic steel sheets (42a) laminated on the stator core (35). Therefore, the simple method of laminating the magnetic steel sheets (42a) makes it possible to reliably partition the frame (21) and the stator (33) without newly processing the frame (21). it can. And since the partition member (42) is formed so as to protrude in the axial direction from the coil (36), the partition member (42) can be sandwiched between the frame (21) and the stator core (35). It is like that. This also ensures that the space between the frame (21) and the stator (33) can be partitioned.
• the outlet of the communication passage (26) opens toward the coil (36) of the stator (33), the refrigerant gas flowing out of the communication passage (26) is Flow towards 36). Therefore, the oil contained in the refrigerant gas can be trapped by the coil (36) and turned into droplets, so that the oil can be efficiently extracted from the refrigerant gas. Can be separated. As a result, it is possible to suppress the oil from being discharged together with the gas discharged from the discharge pipe (18).
• the stator (33) of the electric motor (24) is press-fitted into the casing (11), and a vertical groove (35d) is formed by cutting a part of the outer peripheral surface of the stator (33).
• the gas passage (40) is formed by the gap formed between the vertical groove (35d) and the casing (11). Therefore, the refrigerant gas can be reliably circulated outside the stator (33) while the support rigidity of the electric motor (24) is improved.
• the discharge pipe (18) is displaced in the circumferential direction with respect to the position where the vertical groove (35d) is formed, a plurality of refrigerant gas is provided in the circumferential direction. After flowing upward in (40), the flow changes direction to the circumferential direction. Therefore, by performing cooling from a plurality of directions outside the stator (33), the motor (24) can be cooled efficiently, while the refrigerant passes through the discharge pipe (18) until it is discharged from the discharge pipe (18). Since the path can be made longer, it is possible to separate more oil contained in the refrigerant gas.
• the gas flowing out of the gas passage (40) flows into the discharge space (16).
• the discharge space (16) is larger than the outlet of the gas passage (40) of the stator (33)
• the flow velocity of the refrigerant gas flowing out of the gas passage (40) decreases.
• the refrigerant gas having the reduced flow velocity is discharged to the outside of the casing (11) through the discharge pipe (18). Therefore, since the flow rate of the refrigerant gas is reduced before flowing into the discharge pipe (18), more oil contained in the refrigerant gas can be separated before flowing into the discharge pipe (18).
• the concentrated winding method is adopted, so that the teeth (35b) adjacent to each other are used. A gap (39b) is also formed between them. Therefore, the area of the passage through which the refrigerant gas flows can be made larger, the refrigerant gas can efficiently and reliably flow into the gaps (39a, 39b), and the cooling efficiency of the electric motor (24) can be improved. Can be.
• FIG. 4 shows Embodiment 2 of the present invention.
• the same components as in the first embodiment are required.
• Elements are denoted by the same reference numerals, and detailed description thereof will be omitted.
• the partition member (42) is constituted by a part of the frame (21). Specifically, the flange portion (2k) of the frame (21) is formed in a disk shape as described above.
• the partition member (42) is formed by extending the outer peripheral end of the flange portion (21c) downward. That is, the partition member (42) is formed integrally with a portion of the frame (21) on the side of the electric motor (24).
• the partition wall member (42) has a cylindrical shape concentric with the drive shaft (23), and its axial length is such that the coil (36) of the motor (24) is the shaft of the stator core (35). It is formed longer than the length protruding from the direction end face.
• the lower end of the partition member (42) is in contact with the upper end of the stator core (35) of the stator core (35).
• FIG. 5 shows Embodiment 3 of the present invention.
• the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
• the partition member (42) is formed of a cylindrical member separate from the frame (21) and the stator (33) of the electric motor (24).
• the partition member (42) is formed to be longer than the length in which the coil (36) of the electric motor (24) projects in the axial direction from the axial end face of the stator core (35).
• the partition member (42) is fitted between the flange portion (21c) of the frame (21) and the stator (33) of the electric motor (24), and is concentric with the drive shaft (23). Are located.
• the partition member (42) has its upper end in contact with the lower end of the flange portion (21c), while its lower end contacts the upper end of the stator core (35) of the stator core (35). .
• the space between the frame (21) and the stator (33) is reliably partitioned without newly processing the frame (21) and the stator (33). be able to.
• Other configurations, operations, and effects are the same as those of the first embodiment.
• FIG. 6 shows a fourth embodiment of the present invention.
• the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
• the stator (33) of the electric motor (24) is indirectly fixed to the casing (11) via the frame (21). Specifically, the outer diameter of the stator core (35) of the stator (33) is smaller than the inner diameter of the casing (11). And, the stator (33) is arranged away from the inner surface of the casing (11). A through hole (35e) for passing a bolt (51) is formed in the core body (35a) of the stator core (35). The stator (33) is arranged so that the partition member (42) is sandwiched between the stator (33) and the frame (21), and the bolt (51) inserted into the through hole (33f) is used to fix the flange of the frame (21). Part (21c).
• the gas passage (40) is formed by a gap having a predetermined width formed between the casing (11) and the stator (33). That is, as described above, since the outer diameter of the stator core (35) is formed smaller than the inner diameter of the casing (11), the outer diameter of the stator (33) is reduced over the entire circumferential direction of the stator (33). A gap is formed between the sink (11) and the stator (33). The gap forms a gas passage (40) through which the refrigerant gas can flow. In the fourth embodiment, no vertical groove (35d) is formed on the outer peripheral surface of the stator (33).
• a plurality of gas passages (40) of the stator (33) are provided in the circumferential direction.
• the discharge pipe (18) is preferably arranged on the opposite side of the gas passage (40) across the drive shaft (23). By doing so, the flow path of the refrigerant gas from the discharge pipe (18) to the discharge can be made as long as possible, and more oil contained in the refrigerant gas can be separated.
• the stator core (35) of the electric motor (24) has a configuration in which the electromagnetic steel sheets (35c) are laminated.
• the present invention is not limited to this, and the stator core (35) May be constituted by a member integrally formed by using a dust core, for example.
• the partition member (42) is configured by laminating a predetermined number of electromagnetic steel sheets (42a) on the upper end of the stator core (35). ) May be integrally formed in a cylindrical shape.
• the stator core (35) and the partition member (42) may be integrally formed of a dust core or the like. Also in this configuration, it is necessary to form the partition member (42) so as to protrude more in the axial direction than the coil (36).
• the stator (33) of the electric motor (24) has a so-called concentrated winding method.
• the coil (36) may be wound around a plurality of teeth (35b).
• the so-called distributed winding method may be used.
• the partition member (42) may be constituted by a part of the frame (21) extending downward from the flange portion (21c), or the partition member (42) and the frame (21) It may be constituted by a cylindrical member separate from the child (33).
• the refrigerant gas flowing out of the communication passage (26) flows through the gap (39a, 39b), and then is discharged from the discharge pipe (18) through the gas passage (40).
• the refrigerant gas flowing out of the communication passage (26) flows through the gas passage (40) and then flows out of the discharge pipe (18) through the gap (39a, 39b). It may be configured so that
• the scroll type compressor (10) is used.
• the present invention is not limited to this.
• the scroll type compressor (10) may be used as a single-piston, single-piston type compressor.
• the present invention is useful for a compressor in which a compression mechanism and an electric motor are housed in a casing.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Applications Or Details Of Rotary Compressors (AREA)
• Compressor (AREA)
• Rotary Pumps (AREA)
• Motor Or Generator Cooling System (AREA)
• Reciprocating Pumps (AREA)
• Iron Core Of Rotating Electric Machines (AREA)

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• 2003
  • 2003-06-09 JP JP2003163800A patent/JP4492043B2/ja not_active Expired - Fee Related
• 2004
  • 2004-06-09 US US10/558,635 patent/US20060257272A1/en not_active Abandoned
  • 2004-06-09 EP EP04736465A patent/EP1640609A4/en not_active Withdrawn
  • 2004-06-09 CN CNB2004800156160A patent/CN100432435C/zh not_active Expired - Fee Related
  • 2004-06-09 EP EP12007493.5A patent/EP2559902A3/en not_active Withdrawn
  • 2004-06-09 KR KR1020057023525A patent/KR100711694B1/ko not_active IP Right Cessation
  • 2004-06-09 WO PCT/JP2004/008418 patent/WO2004109108A1/ja active Application Filing

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