JP4492043B2 - Compressor - Google Patents

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Publication number
JP4492043B2
JP4492043B2 JP2003163800A JP2003163800A JP4492043B2 JP 4492043 B2 JP4492043 B2 JP 4492043B2 JP 2003163800 A JP2003163800 A JP 2003163800A JP 2003163800 A JP2003163800 A JP 2003163800A JP 4492043 B2 JP4492043 B2 JP 4492043B2
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JP
Japan
Prior art keywords
stator
electric motor
casing
partition member
formed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP2003163800A
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Japanese (ja)
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JP2005002799A (en
Inventor
和貴 堀
孝志 清水
Original Assignee
ダイキン工業株式会社
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Priority to JP2003163800A priority Critical patent/JP4492043B2/en
Publication of JP2005002799A publication Critical patent/JP2005002799A/en
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Publication of JP4492043B2 publication Critical patent/JP4492043B2/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component 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
    • F04B39/06Cooling; Heating; Prevention of freezing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component 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
    • F04B39/02Lubrication
    • F04B39/0223Lubrication characterised by the compressor type
    • F04B39/023Hermetic compressors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02Rotary-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
    • F04C18/0207Rotary-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
    • F04C18/0215Rotary-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04Heating; Cooling; Heat insulation
    • F04C29/045Heating; Cooling; Heat insulation of the electric motor in hermetic pumps

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a compressor, and particularly relates to measures for cooling an electric motor.
[0002]
[Prior art]
Conventionally, as a compressor, for example, as disclosed in Patent Documents 1 to 3, an electric compressor in which a compression mechanism and an electric motor for driving the compression mechanism are housed in a sealed casing. It has been known. This type of compressor is connected to a refrigerant circuit such as a refrigeration apparatus and used to compress refrigerant gas. In this compressor, the compression mechanism includes a fixed scroll and a movable scroll, and the fixed scroll is fixed to the casing via the housing. The electric motor includes a stator fixed to the casing, a rotor rotatably disposed inside the stator, and a drive shaft fixed to the rotor. Then, the rotation of the rotor rotates the drive shaft to drive the compression mechanism. On the other hand, part of the outer peripheral surface of the stator of the electric motor is cut, 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.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 5-164069
[Patent Document 2]
Japanese Patent Laid-Open No. 10-22381
[Patent Document 3]
JP-A-2-16987
[0004]
[Problems to be solved by the invention]
By the way, the conventional one does not actively control the flow of the refrigerant gas in the casing. For this reason, the refrigerant gas is discharged through the discharge pipe after flowing through the casing. At this time, since the refrigerant gas has a property of flowing in a direction with less resistance, the refrigerant gas does not necessarily flow uniformly in the gap, and the refrigerant gas may flow unevenly. Therefore, although the conventional one can cool the electric motor with the refrigerant gas, there is a problem that the electric motor cannot be efficiently cooled.
[0005]
For example, in a configuration in which the discharge pipe is attached to the casing so as to communicate with the space between the compression mechanism and the electric motor, a part of the refrigerant gas discharged from the compression mechanism passes through the gap around the stator. Since it discharges from a discharge pipe without passing, the problem that cooling of the electric motor by refrigerant gas cannot be performed effectively also arises.
[0006]
Therefore, the present invention has been made in view of such a point, and an object thereof is to efficiently cool an electric motor.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention uses the gas discharged from the compression mechanism (22) as the gap (39a, 39b) of the electric motor (24). From Gas passage (40 )What It is intended to be distributed.
[0008]
Claim 1 to 4 According to the present invention, a compression mechanism (22) and an electric motor (24) for driving the compression mechanism (22) are housed in a casing (11), and the casing (11) includes a compression mechanism (22) and an electric motor ( 24), the first storage space (13) of the compression mechanism (22) and the electric motor (24) in the casing (11) on the assumption that the compressor is connected to the discharge pipe (18). A partition member (21) partitioned into the second storage space (14), and a communication formed in the partition member (21) for guiding the gas discharged from the compression mechanism (22) to the second storage space (14) It is formed between the passage (26), the stator (33) of the electric motor (24) and the casing (11), and is formed across both ends of the electric motor (24), with one end at both ends in the electric motor (24). A gas passage (40) communicating with the spanning gap (39a, 39b), the communication passage (26) and the other end of the gap (39a, 39b) communicating with each other, and a discharge pipe A partition member (42) for communicating the discharge space (16) communicating with (18) and the other end of the gas passage (40) is provided.
[0009]
Claims 1 to 4 The invention of ,Up The partition member (42) is formed between the partition member (21) and the stator (33) of the electric motor (24).
[0010]
And , Claims 1 The invention of ,Up The partition member (42) is formed integrally with the partition member (21).
[0011]
Claims 2 The invention of ,Up The partition wall member (42) is formed in a cylindrical shape that is integral with the iron core (35) of the stator (33) of the electric motor (24) and protrudes in the axial direction from the coil (36).
[0012]
Claims 3 The invention of ,Up The partition wall member (42) is formed by stacking annular steel plates (42a).
[0013]
Claims 4 The invention of ,Up 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).
[0014]
Claims 5 The invention of claim Any one of 1 to 4 In the invention, the outlet of the communication passage (26) opens toward the coil (36) of the stator (33).
[0015]
Claims 6 The invention of claim 1 starts from claim 1. 5 In the invention according to any one of the above, the outer peripheral surface of the stator (33) is in close contact with the casing (11), while the gas passage (40) is a vertical formed on the outer peripheral surface of the stator (33). It consists of a groove (35d).
[0016]
Claims 7 The invention of claim 6 In the invention, a plurality of the longitudinal grooves (35d) are provided in the circumferential direction, and the discharge pipe (18) is displaced in the circumferential direction with respect to the formation position of the longitudinal grooves (35d).
[0017]
Claims 8 The invention of claim 6 In the present invention, only one longitudinal groove (35d) is provided, and the discharge pipe (18) is opposite to the formation position of the longitudinal groove (35d) with respect to the drive shaft (23) of the electric motor (24). Is provided.
[0018]
Claims 9 The invention of claim 1 From 5 In any one of the inventions, the stator (33) of the electric motor (24) is indirectly attached to the casing (11) via the partition member (21), and the gas passage (40) is fixed. It is comprised by the clearance gap formed over the whole circumferential direction of a child (33).
[0019]
Claims 10 The invention of claim 1 From 9 In any one of the inventions, the discharge space (16) is larger than the outlet of the gas passage (40).
[0020]
Claims 11 The invention of claim 1 starts from claim 1. 10 In any one of the inventions, the stator (33) of the electric motor (24) has a coil (36) wound individually for each tooth portion (35b) of the iron core (35) of the stator (33). It has been.
[0021]
Ie , Claims 1 to 4 In this invention, the gas discharged from the compression mechanism (22) flows through the communication passage (26) to the second storage space (14). When this gas flows out from the communication passage (26), it flows into the gap (39a, 39b) of the electric motor (24). This gas cools the electric motor (24) as it flows through the gap (39a, 39b). The gas flowing out of the gap (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 then discharged out of the casing (11) through the discharge pipe (18).
[0022]
Claims 5 In the present invention, the gas flowing out from the communication passage (26) flows toward the coil (36) of the stator (33). When this gas contains an oil component, the oil component is captured by the coil (36) to form droplets.
[0023]
Claims 6 In this invention, the stator (33) of the electric motor (24) is fixed to the casing (11). On the other hand, gas flows through the gas passage (40) formed between the longitudinal groove (35d) on the outer peripheral surface of the stator (33) and the casing (11).
[0024]
Claims 7 In this invention, 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 outside the casing (11) through the discharge pipe (18) after changing the flow direction to the circumferential direction.
[0025]
Claims 8 In this invention, after the gas flows through the gas passage (40) of the stator (33) formed at one place in the circumferential direction, the flow direction is changed in the circumferential direction. And this gas is discharged to a casing (11) through the discharge pipe (18) located in the other side on both sides of the drive shaft (23) of an electric motor (24).
[0026]
Claims 9 In this invention, the stator (33) is indirectly attached to the casing (11) via the partition member (21), and the outer periphery of the stator (33) extends over the entire circumferential direction. A gap is formed. The gap constitutes a gas passage (40), and the gas discharged from the compression mechanism (22) flows through the gas passage (40).
[0027]
Claims 10 In this invention, the gas flowing out from the gas passage (40) of the stator (33) flows into the discharge space (16). At this time, since the discharge space (16) is larger than the outlet of the gas passage (40), the flow velocity of the gas flowing out from the gas passage (40) is reduced. Then, the gas whose flow rate is reduced is discharged out of the casing (11) through the discharge pipe (18).
[0028]
Claims 11 In this invention, the coil (36) of the stator (33) is individually wound around each tooth portion (35b) of the iron core (35) of the stator (33). For this reason, a gap (39b) is also formed between adjacent tooth portions (35b). Therefore, the gas flows through the gap (39b) between the teeth (35b) and the gap (39a) between the stator (33) and the rotor (34).
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment.
[0030]
(Embodiment 1)
Embodiment 1 of the present invention is applied to a scroll-type compressor that is a compressor that is connected to a refrigerant circuit (not shown) of a refrigeration apparatus that performs, for example, a vapor compression refrigeration cycle and is used to compress refrigerant gas. It is a thing.
[0031]
As shown in FIG. 1, the compressor (10) according to this embodiment has a casing (11) made of a pressure vessel, and is fixed to the casing (11). A frame (21) as a partition member, a scroll-type compression mechanism (22) attached to the upper end of the frame (21), and a drive shaft (23) are provided, and are arranged below the frame (21). And an electric motor (24). The frame (21) is disposed between the compression mechanism (22) and the electric motor (24). The casing (11) is positioned above the frame (21), and is positioned below the first storage space (13) in which the compression mechanism (22) is stored and the frame (21). It is partitioned into a second storage space (14) in which (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).
[0032]
A suction pipe (17) and a discharge pipe (18) are attached to the casing (11). The suction pipe (17) passes through the casing (11) and is fitted into the compression mechanism (22). The discharge pipe (18) passes through the casing (11) and has an inner end opened to the discharge space (16).
[0033]
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 press-fitted into an upper position of the casing (11). On the upper surface of the frame (21), there is provided an upper surface recess (21a) formed so as to be recessed in the center. In addition, an outer peripheral recess (21b) is formed on the outer peripheral surface of the frame (21). A disc-shaped flange portion (21c) extending in the horizontal direction toward the casing (11) is formed at the lower end portion of the outer peripheral recess (21b) in the frame (21).
[0034]
The frame (21) is provided with a bearing portion (21d) below the upper surface recess (21a). This bearing part (21d) consists of a sliding bearing and rotatably supports one end (upper end part) of the drive shaft (23) of the electric motor (24).
[0035]
The frame (21) is provided with a communication passage (26) penetrating vertically. The communication passage (26) has an inflow 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), while the flange portion (21c ) Has an outlet opening so as to face the second storage space (14).
[0036]
The discharge pipe (18) passes through the casing (11) between the portion where the frame (21) is in close contact with the casing (11) and the electric motor (24). The discharge pipe (18) communicates with the discharge space (16) between the casing (11) and the outer peripheral recess (21b) of the frame (21).
[0037]
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). Both scrolls (27, 28) are each composed of an end plate (27a, 28a) and a spiral wrap (27b, 28b) formed on the end plate (27a, 28a). The wraps (27b, 28b) of the scrolls (27, 28) are provided so as to mesh with each other.
[0038]
The movable scroll (28) is disposed between the fixed scroll (27) and the frame (21). Further, between the end plate (28a) of the movable scroll (28) and the frame (21), rotation of an Oldham coupling or the like is performed so that the movable scroll (73) only revolves with respect to the fixed scroll (27). A blocking member (30) is provided.
[0039]
Between the end plate (27a) of the fixed scroll (27) and the end plate (28a) of the movable scroll (28), the space between the contact portions of both wraps (27b, 28b) is configured as a compression chamber (32). . Further, a discharge hole (27d) for discharging the high-pressure refrigerant is formed through the central portion of the end plate (27a) of the fixed scroll (27).
[0040]
The suction pipe (17) is fitted into the end plate (27a) of the fixed scroll (27). The inner end of the suction pipe (17) opens into a refrigerant gas suction chamber (27c) formed at the peripheral edge of the wrap (27b).
[0041]
A boss (28c) protruding in a cylindrical shape is formed at the center of the lower surface of the end plate (28a) of the movable scroll (28). The upper end portion of the drive shaft (23) is inserted into the boss (28c). The upper end portion 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) just below the upper end of the drive shaft (23). In other words, the electric motor (24) is connected to the frame (21) via the drive shaft (23).
[0042]
Note that the seal ring (31) that presses against the lower surface of the end plate (28a) of the movable scroll (28) is arranged around the boss (28c) and is engaged with the upper surface recess (21a) of the frame (21). ). 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 from the seal ring (31), and the gas refrigerant The movable scroll (28) is brought into pressure contact with the fixed scroll (27) by the action of high pressure.
[0043]
The electric motor (24) is disposed immediately below the bearing portion (21d) of the frame (21). The electric motor (24) is made 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 rotates integrally with the rotor (34).
[0044]
As shown in FIGS. 2 and 3, the stator (33) includes a stator core (35) and a coil (36) attached to the stator core (35). The stator core (35) includes an annular core body (35a) that is press-fitted and fixed to the casing (11), and teeth (35b) that are formed so as to protrude to the inside of the core body (35a). ).
[0045]
As shown in FIG. 2, the stator core (35) is formed by laminating a number of electromagnetic steel plates (35c) punched by press working. Each of the electromagnetic steel plates (35c) is composed of an annular portion constituting the iron core body (35a) and a substantially rectangular portion constituting the teeth (35b).
[0046]
As shown in FIG. 3, a plurality of teeth (35 in this embodiment) are provided at equal intervals in the circumferential direction. The tips of the teeth (35b) are each formed in an arc shape, and a cylindrical space is formed inside the tips of the teeth (35b).
[0047]
The rotor (34) has a structure in which a permanent magnet (34b) is embedded in a cylindrical rotor core (34a) formed by laminating electromagnetic steel plates punched by press working. The rotor (34) is arranged so that a gap (39a) having a predetermined width is formed between the rotor (34) and the teeth (35b) in a space formed inside the teeth (35b).
[0048]
The stator (33) employs a concentrated winding (direct winding) method as a winding method of the coil (36). That is, the coils (36) are individually wound around the teeth (35b) of the stator core (35). A gap (39b) having a predetermined width is formed between adjacent teeth (35b).
[0049]
The gap (39a, 39b) is formed from the upper end to the lower end of the electric motor (24). And the lower end part of a gap (39a, 39b) is opened to the communicating space (15) below a motor (24).
[0050]
The core body (35a) of the stator core (35) is provided with a longitudinal groove (35d) formed by cutting out a part of the outer peripheral surface in the circumferential direction. The longitudinal groove (35d) is arranged just outside the teeth (35b) so as to correspond to the teeth (35b), and is formed in an elongated shape in the circumferential direction and formed over the entire axial direction. ing. The vertical groove (35d) and the casing (11) form a gas passage (40) through which refrigerant gas can flow. That is, the gas passage (40) is formed across both ends of the electric motor (24). The lower end portion of the gas passage (40) opens into the communication space (15), whereby the gas passage (40) communicates with the gap (39a, 39b) at the lower end portion.
[0051]
The discharge pipe (18) is disposed so as to be displaced in the circumferential direction with respect to the formation position of the longitudinal groove (35d). That is, the discharge pipe (18) is disposed directly above the adjacent vertical grooves (35d).
[0052]
As shown in FIGS. 1 and 2, 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 to connect the flange portion (21c) of the frame (21) and the core body (35a) of the stator core (35). Thereby, the space between the frame (21) and the stator (33) is partitioned into inner and outer spaces. The partition member (42) is formed by laminating a predetermined number of annular magnetic steel plates (42a) that are not formed with the portions constituting the teeth (35b), that is, only the portions constituting the iron core body (35a). It is configured. The partition member (42) is formed longer than the length in which the coil (36) protrudes in the axial direction from the axial end surface of the stator core (35). Then, by stacking the predetermined number of electromagnetic steel plates (42a) on the laminate of the electromagnetic steel plates (35c) constituting the stator core (35), the upper end of the partition wall member (42) is the flange of the frame (21). It is in contact with the lower end of the part (21c).
[0053]
In the space inside the partition member (42), the outlet of the communication passage (26) of the frame (21) is opened, and the upper ends of the gaps (39a, 39b) are opened as inlets. On the other hand, in the space outside the partition member (42), the upper end portion of the gas passage (40) opens as an outlet and communicates with the discharge space (16). That is, the partition member (42) communicates the communication passage (26) with the upper ends of the gaps (39a, 39b) and the discharge space (16) and the gas passage (40).
[0054]
A bearing plate (44) and an oil sump (45) are provided in the communication space (15). The bearing plate (44) is fixed to the casing (11) and is configured to rotatably support the lower end portion of the drive shaft (23). The oil stored in the oil sump (45) is supplied to the sliding parts such as the compression mechanism (22) and the bearing part (21d) through an oil supply passage (not shown) formed in the drive shaft (23). It has become so.
[0055]
The operation of the compressor (10) according to this embodiment will be described. First, when the electric motor (24) is started, the rotor (34) rotates with respect to the stator (33), and thereby the drive shaft (23) rotates. With the rotation of the drive shaft (23), the movable scroll (28) does not rotate but only revolves with respect to the fixed scroll (27). As a result, low-pressure refrigerant is sucked from the suction pipe (17) into the peripheral portion of the compression chamber (32), and the refrigerant is compressed as the volume of the compression chamber (32) changes. This refrigerant becomes a high pressure by the action of compression, and is discharged from the discharge hole (27d) to the first accommodation space (13). This refrigerant gas contains oil. That is, a part of the oil supplied from the oil reservoir (45) to the compression mechanism (22) is discharged together with the refrigerant gas to the first accommodation space (13).
[0056]
And the refrigerant gas with which the 1st accommodation space (13) is filled is guide | induced to a 2nd accommodation space (14) through a connection channel | path (26). At this time, the refrigerant gas that has flowed 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). . For this reason, a part of the oil contained in the refrigerant gas is captured by the coil (36) and formed into droplets. Thereby, the oil component which became this droplet is isolate | separated from refrigerant gas. Then, the refrigerant gas flows into the gap (39a, 39b) of the electric motor (24).
[0057]
Some of them flow downward through the gap (39a) between the stator (33) and the rotor (34), and others flow downward through the gap (39b) between the teeth (35b). Flowing. At this time, the refrigerant gas cools the electric motor (24) while flowing through the gap (39a, 39b). Then, the refrigerant gas flows out from the lower end of the gap (39a, 39b) to the communication space (15). In this communication space (15), the flow passage area is larger than the flow passage area of the gap (39a, 39b), so that the flow rate of the refrigerant gas is reduced in this communication space (15). Therefore, part of the oil contained in the refrigerant gas is also separated in this communication space (15).
[0058]
The refrigerant gas then flows into the gas passage (40) and flows upward. At this time, the refrigerant gas cools the electric motor (24) while flowing through the gas passage (40). That is, while the refrigerant gas flows downward in the gaps (39a, 39b), the refrigerant gas flows upward in the gas passage (40), so the direction in which the refrigerant gas flows in the casing (11) is restricted. Will be.
[0059]
The refrigerant gas that has flowed out of the gas passage (40) flows 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 rate of the refrigerant gas decreases in the discharge space (16). Therefore, part of the oil contained in the refrigerant gas is also separated in the discharge space (16). The refrigerant gas is discharged from the casing (11) through the discharge pipe (18) after changing the flow direction to the circumferential direction in the discharge space (16).
[0060]
Therefore, according to the compressor (10) according to the first embodiment, the entire amount of 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). It can be distributed. At this time, since the flow direction of the refrigerant gas is regulated by the partition member (42), the entire amount of the refrigerant gas flowing out from the communication passage (26) can be surely flowed into the gap (39a, 39b). it can. As a result, the electric motor (24) can be efficiently cooled by the refrigerant gas.
[0061]
In the first embodiment, the refrigerant gas flows from the gap (39a, 39b) to the gas passage (40), and the refrigerant gas flowing out from the gas passage (40) is discharged through the discharge pipe (18). Yes. Therefore, since the discharge pipe (18) may be provided so that the inner end portion thereof communicates with the discharge space (16), a simple configuration can be achieved.
[0062]
In the first embodiment, the partition member (42) is constituted by a predetermined number of electromagnetic steel plates (42a) laminated on the stator core (35). Therefore, the frame (21) and the stator (33) can be reliably partitioned by a simple method of laminating the electromagnetic steel plates (42a) without newly processing the frame (21). 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 makes it possible to reliably partition the space between the frame (21) and the stator (33).
[0063]
In Embodiment 1, since 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) It flows toward 36). Therefore, since the oil component contained in the refrigerant gas can be captured by the coil (36) and formed into droplets, the oil component can be efficiently separated from the refrigerant gas. As a result, it is possible to suppress oil from being discharged together with the gas discharged from the discharge pipe (18).
[0064]
In the first embodiment, the stator (33) of the electric motor (24) is press-fitted into the casing (11), while the longitudinal groove (35d) is formed by cutting off a part of the outer peripheral surface of the stator (33). Thus, a gas passage (40) is formed by a gap formed between the longitudinal groove (35d) and the casing (11). Therefore, it is possible to reliably distribute the refrigerant gas to the outside of the stator (33) while improving the support rigidity of the electric motor (24).
[0065]
Further, in the first embodiment, the discharge pipe (18) is shifted in the circumferential direction with respect to the formation position of the longitudinal groove (35d), so that a plurality of refrigerant gases are provided in the circumferential direction. 40) After flowing upward, the flow direction is changed to the circumferential direction. Therefore, by cooling from a plurality of directions outside the stator (33), the electric motor (24) can be efficiently cooled, while a long refrigerant path can be taken until it is discharged from the discharge pipe (18). Therefore, it becomes possible to separate more oil contained in the refrigerant gas.
[0066]
In the first embodiment, the gas flowing out from the gas passage (40) flows into the discharge space (16). At this time, since 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 from the gas passage (40) is reduced. Then, the refrigerant gas having the reduced flow velocity is discharged out of the casing (11) through the discharge pipe (18). Therefore, since the flow rate of the refrigerant gas decreases before flowing into the discharge pipe (18), more oil can be separated before flowing into the discharge pipe (18).
[0067]
In the first embodiment, since the coil (36) is wound individually for each tooth (35b) of the stator core (35), the teeth (35b) are also adjacent to each other. A gap (39b) is formed. Therefore, the area of the passage through which the refrigerant gas flows can be increased, the refrigerant gas can be efficiently and surely flowed into the gap (39a, 39b), and the cooling efficiency of the electric motor (24) can be improved. it can.
[0068]
(Embodiment 2)
FIG. 4 shows Embodiment 2 of the present invention. Here, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0069]
In this Embodiment 2, the partition member (42) is comprised by a part of flame | frame (21). Specifically, the flange portion (21c) of the frame (21) is formed in a disc shape as described above. And the partition member (42) is comprised by extending the outer peripheral edge part of this flange part (21c) below. That is, the partition wall member (42) is integrally formed at a portion of the frame (21) on the electric motor (24) side. The partition member (42) has a concentric cylindrical shape with the drive shaft (23), and the axial length of the partition member (42) is the axial direction of the stator core (35) by the coil (36) of the motor (24). It is formed longer than the length protruding from the end face. And the lower end part of a partition member (42) is contact | abutting to the upper end part in the iron core main body (35a) of a stator core (35).
[0070]
Therefore, according to the second embodiment, it is possible to reliably partition the space between the frame (21) and the stator (33) without newly processing the stator (33) of the electric motor (24). it can.
[0071]
Other configurations, operations, and effects are the same as those of the first embodiment.
[0072]
(Embodiment 3)
FIG. 5 shows Embodiment 3 of the present invention. Here, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0073]
In the third embodiment, the partition member (42) is formed of a cylindrical member that is separate from the frame (21) and the stator (33) of the electric motor (24). The partition member (42) is formed longer than the length in which the coil (36) of the electric motor (24) protrudes in the axial direction from the axial end surface of the stator core (35). The partition member (42) is fitted between the flange (21c) of the frame (21) and the stator (33) of the electric motor (24), and is arranged concentrically with the drive shaft (23). Has been. The partition member (42) has an upper end in contact with the lower end of the flange (21c), and a lower end in contact with the upper end of the core body (35a) of the stator core (35).
[0074]
Therefore, according to the third embodiment, the space between the frame (21) and the stator (33) is surely partitioned without newly processing the frame (21) and the stator (33). Can do.
[0075]
Other configurations, operations, and effects are the same as those of the first embodiment.
[0076]
(Embodiment 4)
FIG. 6 shows Embodiment 4 of the present invention. Here, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0077]
In the fourth embodiment, the stator (33) of the electric motor (24) is indirectly fixed to the casing (11) via the frame (21). More specifically, the stator core (35) of the stator (33) has an outer diameter smaller than the inner diameter of the casing (11). And the stator (33) is arrange | positioned in the state away from the inner surface of the casing (11). A through hole (35e) for inserting the bolt (51) is formed in the core body (35a) of the stator core (35). The stator (33) is disposed in a state in which the partition wall member (42) is sandwiched between the stator (33) and the flange of the frame (21) by the bolt (51) inserted through the through hole (33f). Fastened to the part (21c).
[0078]
The gas passage (40) is configured by a gap having a predetermined width formed between the casing (11) and the stator (33). That is, since the outer diameter of the stator core (35) is smaller than the inner diameter of the casing (11) as described above, the casing (11) and the entire circumferential direction of the stator (33) A gap is formed between the stators (33). The gap constitutes a gas passage (40) through which refrigerant gas can flow. In the fourth embodiment, no vertical groove (35d) is formed on the outer peripheral surface of the stator (33).
[0079]
Therefore, according to the fourth embodiment, since the refrigerant gas flows over the entire outer periphery of the stator (33), the cooling of the electric motor (24) can be further enhanced while the electric motor (24) is reliably supported. Can be done efficiently.
[0080]
Other configurations, operations, and effects are the same as those of the first embodiment.
[0081]
Other Embodiments of the Invention
In the first to third embodiments, the plurality of gas passages (40) of the stator (33) are provided in the circumferential direction. Alternatively, only one gas passage (40) may be provided in the circumferential direction. Good. In this case, the discharge pipe (18) is preferably arranged on the opposite side of the gas passage (40) with the drive shaft (23) in between. By doing so, it is possible to maximize the circulation path of the refrigerant gas until it is discharged from the discharge pipe (18), and it becomes possible to separate more oil contained in the refrigerant gas.
[0082]
Moreover, in each said embodiment, although the stator core (35) of the electric motor (24) was set as the structure which laminated | stacked the electromagnetic steel plate (35c), it is not restricted to this, A stator core (35) is For example, you may comprise by the member formed integrally by using a powder iron core.
[0083]
In the first embodiment, the partition member (42) is configured by laminating a predetermined number of electromagnetic steel plates (42a) on the upper end of the stator core (35), but instead of this, the stator core (35 ) May be integrally formed in a cylindrical shape. For example, the stator core (35) and the partition member (42) may be integrally formed with a dust core or the like. Also in this configuration, it is necessary to form the partition member (42) so as to protrude in the axial direction from the coil (36).
[0084]
In each of the above embodiments, the stator (33) of the electric motor (24) is a so-called concentrated winding method, but instead, the coil (36) is wound over a plurality of teeth (35b). A so-called distributed winding method may be used.
[0085]
In the fourth embodiment, the partition member (42) may be constituted by a part of the frame (21) extending downward from the flange portion (21c), or the frame (21) and the stator ( You may comprise by the cylindrical member separate from 33).
[0086]
In each of the above embodiments, the scroll compressor (10) is used. However, the invention is not limited to this, and for example, a rotary piston compressor may be used.
[0087]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
[0088]
Claim 1 to 4 According to the present invention, the entire amount of the gas discharged from the compression mechanism (22) can surely flow into the gaps (39a, 39b) inside the electric motor (24). The gas flowing out of the gap (39a, 39b) can be reliably 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 long, when the oil contains oil, it is possible to separate more of this oil.
[0089]
Claims 1 to 4 According to the invention, since the partition member (42) is formed between the partition member (21) and the stator (33) of the electric motor (24), the partition member (42) flows into the second storage space (14), The flow of gas toward the electric motor (24) can be reliably regulated.
[0090]
Claims 1 According to the invention, since the partition wall member (42) is integrally formed in the electric motor (24) side portion of the partition member (21), the stator (33) of the electric motor (24) is not newly processed. The space between the partition member (21) and the stator (33) can be partitioned reliably.
[0091]
Claims 2 According to the invention, the partition member (42) is formed integrally with the iron core (35) of the stator (33), and the partition member (42) is formed so as to protrude in the axial direction from the coil (36). As a result, the partition member (42) can be sandwiched between the partition member (21) and the iron core (35) of the stator (33), whereby the space between the partition member (21) and the stator (33) Can be reliably partitioned.
[0092]
Claims 3 According to the invention, since the partition wall member (42) is configured by laminating the annular steel plate (42a), the steel plate (42a) can be formed without newly processing the partition member (21). 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 simply laminating.
[0093]
Claims 4 According to the invention, since the partition member (42) is constituted by a member fitted between the partition member (21) and the stator (33) of the electric motor (24), the partition member (21) and the stator ( The space between the partition member (21) and the stator (33) can be reliably partitioned without adding new processing to 33).
[0094]
Claims 5 According to the invention, since the gas flowing out from the communication passage (26) flows toward the coil (36) of the stator (33), oil contained in the gas is captured by the coil (36). Can be made into droplets. Thereby, the oil component can be efficiently separated from the gas, and the oil component can be suppressed from being discharged together with the gas discharged from the discharge pipe (18).
[0095]
Claims 6 According to the invention, 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) to form the gas passage (40). Therefore, the gas can be reliably circulated to the outside of the stator (33) while improving the support rigidity of the electric motor (24).
[0096]
Claims 7 According to the invention, since the plurality of gas passages (40) are provided in the circumferential direction and the discharge pipe (18) is shifted in the circumferential direction with respect to the formation position of the longitudinal groove (35d), the stator (33 ) Can be cooled from a plurality of directions outside, and the motor (24) can be efficiently cooled. Furthermore, since the gas flow path from the compression mechanism (22) to the discharge pipe (18) can be long, when the oil contains oil, it is possible to separate more of this oil.
[0097]
Claims 8 According to the invention, since the discharge pipe (18) is attached to the side opposite to the gas passage (40), the gas flow path from the discharge pipe (18) until the gas is discharged is maximized. When the oil contains an oil, it is possible to separate the oil more.
[0098]
Claims 9 According to the invention, the stator (33) is indirectly attached to the casing (11) via the partition member (21), and the gas flows over the entire outer periphery of the stator (33). The electric motor (24) can be cooled with higher efficiency while reliably supporting (24).
[0099]
Claims 10 According to the invention, since the flow rate of the gas is lowered before flowing into the discharge pipe (18), when the oil contains oil, the oil is more likely to flow before flowing into the discharge pipe (18). Many can be separated.
[0100]
Claims 11 According to the invention, since the coil (36) of the stator (33) is individually wound for each tooth portion (35b) of the iron core (35), the gap (39a) inside the electric motor (24) 39b) can be taken more widely. As a result, gas can be efficiently and surely flowed into the gap (39a, 39b), and the cooling efficiency of the electric motor (24) can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an overall configuration of a compressor according to Embodiment 1 of the present invention.
FIG. 2 is a cross-sectional view showing a configuration of a stator of an electric motor according to Embodiment 1 of the present invention.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a cross-sectional view showing an overall configuration of a compressor according to Embodiment 2 of the present invention.
FIG. 5 is a cross-sectional view showing an overall configuration of a compressor according to Embodiment 3 of the present invention.
FIG. 6 is a cross-sectional view showing an overall configuration of a compressor according to Embodiment 4 of the present invention.
7 is a cross-sectional view taken along line VII-VII in FIG.
[Explanation of symbols]
(11) Casing
(13) First storage space
(14) Second storage space
(16) Discharge space
(18) Discharge pipe
(21) Frame
(22) Compression mechanism
(23) Drive shaft
(24) Electric motor
(26) Connecting passage
(33) Stator
(35) Stator core
(35b) Teeth
(35d) Vertical groove
(36) Coil
(39a) Gap
(39b) Gap
(40) Gas passage
(42) Bulkhead member
(42a) Electrical steel sheet

Claims (11)

  1. A casing (11) houses a compression mechanism (22) and an electric motor (24) that drives the compression mechanism (22). The casing (11) includes a compression mechanism (22) and an electric motor (24). A compressor with a discharge pipe (18) connected in between,
    A partition member (21) for partitioning the inside of the casing (11) into a first storage space (13) of the compression mechanism (22) and a second storage space (14) of the electric motor (24);
    A communication passage (26) formed in the partition member (21) for guiding the gas discharged from the compression mechanism (22) to the second storage space (14);
    A gap (39a, 39b) formed between the stator (33) of the motor (24) and the casing (11), formed over both ends of the motor (24), with one end extending over both ends in the motor (24). Gas passage (40) communicating with
    Bulkhead for communicating the communication passage (26) with the other end of the gap (39a, 39b) and the discharge space (16) communicating with the discharge pipe (18) and the other end of the gas passage (40) A member (42),
    The partition member (42) is formed between the partition member (21) and the stator (33) of the electric motor (24), and is integrally formed with the partition member (21). .
  2. A casing (11) houses a compression mechanism (22) and an electric motor (24) that drives the compression mechanism (22). The casing (11) includes a compression mechanism (22) and an electric motor (24). A compressor with a discharge pipe (18) connected in between,
    A partition member (21) for partitioning the inside of the casing (11) into a first storage space (13) of the compression mechanism (22) and a second storage space (14) of the electric motor (24);
    A communication passage (26) formed in the partition member (21) for guiding the gas discharged from the compression mechanism (22) to the second storage space (14);
    A gap (39a, 39b) formed between the stator (33) of the motor (24) and the casing (11), formed over both ends of the motor (24), with one end extending over both ends in the motor (24). Gas passage (40) communicating with
    Bulkhead for communicating the communication passage (26) with the other end of the gap (39a, 39b) and the discharge space (16) communicating with the discharge pipe (18) and the other end of the gas passage (40) A member (42),
    The partition member (42) is formed between the partition member (21) and the stator (33) of the electric motor (24), is integral with the iron core (35) of the stator (33) of the electric motor (24), and A compressor characterized in that it is formed in a cylindrical shape protruding in the axial direction from the coil (36).
  3. A casing (11) houses a compression mechanism (22) and an electric motor (24) that drives the compression mechanism (22). The casing (11) includes a compression mechanism (22) and an electric motor (24). A compressor with a discharge pipe (18) connected in between,
    A partition member (21) for partitioning the inside of the casing (11) into a first storage space (13) of the compression mechanism (22) and a second storage space (14) of the electric motor (24);
    A communication passage (26) formed in the partition member (21) for guiding the gas discharged from the compression mechanism (22) to the second storage space (14);
    A gap (39a, 39b) formed between the stator (33) of the motor (24) and the casing (11), formed over both ends of the motor (24), with one end extending over both ends in the motor (24). Gas passage (40) communicating with
    Bulkhead for communicating the communication passage (26) with the other end of the gap (39a, 39b) and the discharge space (16) communicating with the discharge pipe (18) and the other end of the gas passage (40) A member (42),
    The partition member (42) is formed between the partition member (21) and the stator (33) of the electric motor (24), and is formed by stacking annular steel plates (42a). Compressor.
  4. A casing (11) houses a compression mechanism (22) and an electric motor (24) that drives the compression mechanism (22). The casing (11) includes a compression mechanism (22) and an electric motor (24). A compressor with a discharge pipe (18) connected in between,
    A partition member (21) for partitioning the inside of the casing (11) into a first storage space (13) of the compression mechanism (22) and a second storage space (14) of the electric motor (24);
    A communication passage (26) formed in the partition member (21) for guiding the gas discharged from the compression mechanism (22) to the second storage space (14);
    A gap (39a, 39b) formed between the stator (33) of the motor (24) and the casing (11), formed over both ends of the motor (24), with one end extending over both ends in the motor (24). Gas passage (40) communicating with
    Bulkhead for communicating the communication passage (26) with the other end of the gap (39a, 39b) and the discharge space (16) communicating with the discharge pipe (18) and the other end of the gas passage (40) A member (42),
    The partition member (42) is formed between the partition member (21) and the stator (33) of the electric motor (24), and between the partition member (21) and the stator (33) of the electric motor (24). A compressor comprising a cylindrical member fitted therein.
  5. In any one of Claims 1-4 ,
    The compressor characterized in that the outlet of the communication passage (26) opens toward the coil (36) of the stator (33).
  6. In any one of Claim 1 to 5 ,
    While the outer peripheral surface of the stator (33) is in close contact with the casing (11),
    The compressor characterized in that the gas passage (40) is constituted by a longitudinal groove (35d) formed in the outer peripheral surface of the stator (33).
  7. In claim 6 ,
    A plurality of the longitudinal grooves (35d) are provided in the circumferential direction,
    The compressor characterized in that the discharge pipe (18) is displaced in the circumferential direction with respect to the formation position of the longitudinal groove (35d).
  8. In claim 6 ,
    There is only one longitudinal groove (35d),
    The compressor characterized in that the discharge pipe (18) is provided on the opposite side of the longitudinal groove (35d) formation position with respect to the drive shaft (23) of the electric motor (24).
  9. In any one of Claim 1 to 5 ,
    The stator (33) of the electric motor (24) is indirectly attached to the casing (11) via the partition member (21),
    The compressor characterized in that the gas passage (40) is constituted by a gap formed over the entire circumferential direction of the stator (33).
  10. In any one of Claim 1 to 9 ,
    The compressor characterized in that the discharge space (16) is larger than the outlet of the gas passage (40).
  11. In any one of Claim 1 to 10 ,
    The stator (33) of the electric motor (24) has a coil (36) wound individually for each tooth (35b) of the iron core (35) of the stator (33). Machine.
JP2003163800A 2003-06-09 2003-06-09 Compressor Expired - Fee Related JP4492043B2 (en)

Priority Applications (1)

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JP2003163800A JP4492043B2 (en) 2003-06-09 2003-06-09 Compressor

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Application Number Priority Date Filing Date Title
JP2003163800A JP4492043B2 (en) 2003-06-09 2003-06-09 Compressor
US10/558,635 US20060257272A1 (en) 2003-06-09 2004-06-09 Compressor
EP04736465A EP1640609A4 (en) 2003-06-09 2004-06-09 Compressor
PCT/JP2004/008418 WO2004109108A1 (en) 2003-06-09 2004-06-09 Compressor
KR20057023525A KR100711694B1 (en) 2003-06-09 2004-06-09 Compressor
CNB2004800156160A CN100432435C (en) 2003-06-09 2004-06-09 Compressor
EP12007493.5A EP2559902A3 (en) 2003-06-09 2004-06-09 Compressor

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JP2005002799A JP2005002799A (en) 2005-01-06
JP4492043B2 true JP4492043B2 (en) 2010-06-30

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US (1) US20060257272A1 (en)
EP (2) EP2559902A3 (en)
JP (1) JP4492043B2 (en)
KR (1) KR100711694B1 (en)
CN (1) CN100432435C (en)
WO (1) WO2004109108A1 (en)

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CN101294083B (en) * 2007-04-29 2010-12-01 王暾 Air film coke quenching additive agent
CN101294084B (en) * 2007-04-29 2010-06-23 王暾 Air film coke quenching method
JP2010065556A (en) * 2008-09-09 2010-03-25 Sanden Corp Hermetic compressor
FR2998340A1 (en) * 2012-11-19 2014-05-23 Danfoss Commercial Compressors Spiral compressor with variable speed.
FR2998733B1 (en) * 2012-11-27 2016-02-05 Valeo Japan Co Ltd Device for driving an electric compressor and electric compressor comprising such a device
CN104283350A (en) * 2013-07-02 2015-01-14 丹佛斯(天津)有限公司 Stator, motor and compressor
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WO2004109108A1 (en) 2004-12-16
EP2559902A2 (en) 2013-02-20
KR100711694B1 (en) 2007-05-02
EP1640609A1 (en) 2006-03-29
CN100432435C (en) 2008-11-12
CN1802506A (en) 2006-07-12
EP1640609A4 (en) 2011-06-15
EP2559902A3 (en) 2014-05-14
US20060257272A1 (en) 2006-11-16
JP2005002799A (en) 2005-01-06
KR20060018247A (en) 2006-02-28

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