WO2019111620A1 - Electric compressor - Google Patents

Electric compressor Download PDF

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Publication number
WO2019111620A1
WO2019111620A1 PCT/JP2018/041175 JP2018041175W WO2019111620A1 WO 2019111620 A1 WO2019111620 A1 WO 2019111620A1 JP 2018041175 W JP2018041175 W JP 2018041175W WO 2019111620 A1 WO2019111620 A1 WO 2019111620A1
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WO
WIPO (PCT)
Prior art keywords
lid
housing
discharge pipe
disposed
electric compressor
Prior art date
Application number
PCT/JP2018/041175
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French (fr)
Japanese (ja)
Inventor
郁男 江崎
央幸 木全
創 佐藤
小川　真
将成 宇野
紘史 島谷
Original Assignee
三菱重工サーマルシステムズ株式会社
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Application filed by 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Publication of WO2019111620A1 publication Critical patent/WO2019111620A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections

Definitions

  • the present invention relates to a motor-driven compressor.
  • Priority is claimed on Japanese Patent Application No. 2017-236157, filed Dec. 8, 2017, the content of which is incorporated herein by reference.
  • Some electric compressors have a housing that defines an airtight space, a compression unit and an electric unit accommodated in the housing, a discharge pipe, and an insulation terminal (airtight terminal) (for example, a patent) Reference 1.).
  • the housing of the electric compressor disclosed in Patent Document 1 has a cylindrical portion whose both ends are open ends, a lid portion closing one end of the cylindrical portion, and a bottom portion closing the other end of the cylindrical portion. And. A part of the lid portion is arranged to protrude in the axial direction of the cylindrical portion.
  • the lid portion is formed with a first through portion into which the discharge pipe is inserted, and a second through portion through which the insulating terminal (airtight terminal) is disposed.
  • the minimum distance between the first penetrating portion and the second penetrating portion be large.
  • the minimum distance between the first through portion and the second through portion tends to be small, and the pressure resistance of the lid portion It was difficult to secure.
  • an object of this invention is to provide the electric compressor which can ensure the pressure resistance of a cover part, suppressing the raise of cost.
  • a cylindrical portion at least one of which is an open end, a first through portion where the discharge pipe is disposed, and an insulation terminal are disposed.
  • a housing which is formed with a second penetrating portion and connected to one end of the cylindrical portion and includes a lid portion projecting from the cylindrical portion in the extending direction of the cylindrical portion, and which divides an internal space;
  • a compression unit provided in the housing to compress the refrigerant to generate a compressed refrigerant and discharging the compressed refrigerant into the internal space in which the discharge pipe is disposed; and a compression unit provided in the housing,
  • An electric part for electrically driving the compression part wherein the amount of projection of the lid from the cylindrical part is L, the outer diameter of the lid is D, and the thickness of the lid is t, the lid 0 if the minimum distance between the discharge pipe and the insulation terminal at In L / D ⁇ 0.25, and is 1.4 ⁇ h / t ⁇ 2.2
  • L / D is smaller than 0 or 0, the lid can not be protruded from the cylindrical portion, so that it becomes difficult to secure the pressure resistance of the lid.
  • L / D is larger than 0.25, it is possible to secure sufficient compressive strength of the lid, but since the amount of protrusion of the lid from the cylindrical portion becomes large, many scraps after molding occur Will lead to an increase in the cost of the electric compressor. If L / D is larger than 0.25, drawing will be complicated.
  • the amount L of protrusion of the lid, the outer diameter D of the lid so as to satisfy 0 ⁇ L / D ⁇ 0.25 and 1.4 ⁇ h / t ⁇ 2.2.
  • the discharge pipe may be disposed at a position through which the axis of the housing passes.
  • the discharge pipe is brazed to the lid by a brazing material disposed on an outer surface of the lid, and the first through portion is partitioned.
  • the chamfer may be formed on the outer surface side of the lid, and the brazing material may be disposed on the chamfer.
  • the chamfered portion is formed on the outer surface side of the lid portion that defines the first through portion, and the brazing material is disposed in the chamfered portion, whereby the contact area between the lid portion and the discharge pipe and the brazing material It is possible to increase the This makes it possible to increase the connection strength between the lid and the discharge pipe, so that the pressure resistance of the lid can be increased even when the amount of protrusion of the lid is small.
  • the material of the housing may have a tensile strength of 400 N / mm 2 or more.
  • the tensile strength of the material of the housing is less than 400 N / mm 2, it may be difficult to increase the strength of the housing. Therefore, by setting the tensile strength of the material of the housing to 400 N / mm 2 or more, the strength of the housing can be enhanced, and the pressure resistance of the lid can be enhanced even when the amount of protrusion of the lid is small.
  • the refrigerant may be a high-pressure refrigerant containing R32 or CO 2.
  • FIG. 1 A compressor system 10 provided with the motor-driven compressor 11 according to the present embodiment will be described with reference to FIGS. 1 to 3.
  • a rotary compressor is illustrated as an example of the motor-driven compressor 11.
  • O 1 is an axial line of the housing 21 (hereinafter referred to as “axial line O 1 ”)
  • X is an axial direction of the housing 21 (hereinafter referred to as “axial direction X”)
  • L is one end face 21 a of the cylindrical portion 33
  • the amount of protrusion of the lid portion 35 in the axial direction X (hereinafter referred to as “the amount of protrusion L”) with respect to the (upper end surface) is shown.
  • the axial direction X is also the extending direction of the cylindrical portion 33.
  • D is an outer diameter D of a portion of the lid 35 which protrudes from the cylindrical portion 33, and t is between the first penetrating portion 41 and the second penetrating portion 42 (in other words, insulation
  • the thickness (hereinafter referred to as “thickness t”) of the lid 35 (lid main body 38) disposed between the terminal 28 and the discharge pipe 27 is shown.
  • h is a minimum distance between the insulating terminal 28 and the discharge pipe 27 in the portion where the lid 35 is disposed (hereinafter referred to as "minimum distance h"), and B is a region (hereinafter referred to as “region B”). ) Are shown respectively.
  • the minimum distance h is the minimum distance between the discharge pipe 27 and the insulating terminal 28 on the inner surface 35b of the lid 35 (the inner surface 38b of the lid body 38) (the first through portion 41 and the second through portion 42). Minimum interval) is shown.
  • the compressor system 10 includes an electric compressor 11, an accumulator 12, and suction pipes 13 and 14.
  • the electric compressor 11 includes a housing 21, a compression unit 22, a shaft 24, an electric unit 25, a discharge pipe 27, an insulation terminal 28 (airtight terminal), a conductive terminal pin 29, and a power cable 31. Have.
  • the housing 21 is a closed housing and defines an internal space A.
  • the housing 21 has a tubular portion 33, a bottom 34, and a lid 35.
  • the cylindrical portion 33 is a cylindrical member whose both ends (upper and lower ends) are open ends.
  • the bottom portion 34 is connected to the cylindrical portion 33 in a state where a portion is inserted into the other end (lower end) of the housing 21. Thus, the bottom 34 closes the other end of the housing 21.
  • the bottom portion 34 protrudes downward (in the axial direction X) of the cylindrical portion 33.
  • the lid 35 has a lid body 38, a first penetrating portion 41, and a second penetrating portion 42.
  • the lid main body 38 is connected to the cylindrical portion 33 in a state where a portion thereof is inserted into one end (upper end) of the housing 21. Thereby, the lid body 38 closes one end of the housing 21.
  • the lid main body 38 protrudes above the axial direction 33 (axial direction X).
  • the first penetration portion 41 is formed to penetrate the lid main body 38.
  • the first through portion 41 is disposed at a position through which the axis O 1 of the housing 21 passes.
  • a discharge pipe 27 extending in the axial direction X is inserted into the first through portion 41.
  • the outer surface 38a (the outer surface 35a of the lid 35) of the lid main body 38 defining the first through portion 41 has a chamfer having an inclined surface while expanding in diameter from the inner surface of the lid main body 38 toward the outer surface 38a.
  • the part 39 is formed.
  • the discharge pipe 27 inserted into the first through portion 41 is brazed to the lid main body 38 by the chamfer 39 and the brazing material 40 disposed on the outer surface 38 a around the chamfer 39.
  • the chamfer 39 is formed on the outer surface 38 a side of the lid main body 38 that divides the first through portion 41, and the brazing material 40 is disposed in the chamfer 39, whereby the lid 35 and the discharge pipe 27 are formed. It is possible to increase the contact area with the brazing material 40. As a result, the connection strength between the lid 35 and the discharge pipe 27 can be increased, so that the pressure resistance of the lid 35 can be increased even when the amount L of protrusion of the lid 35 is small.
  • the second penetration portion 42 is formed to penetrate the lid main body 38 located outside the first penetration portion 41.
  • An insulating terminal 28 is inserted in the second through portion 42.
  • the insulating terminal 28 is fixed to the lid body 38.
  • a material of the housing 21 made into the said structure it is preferable to use a material (for example, SS400 material) whose tensile strength is 400 N / mm ⁇ 2 > or more, for example.
  • the tensile strength of the material of the housing 21 is smaller than 400 N / mm 2, it may be difficult to increase the strength of the housing 21. Therefore, by setting the tensile strength of the material of the housing 21 to 400 N / mm 2 or more, the strength of the housing 21 can be increased, and the pressure resistance of the cover 35 is increased even when the amount L of the cover 35 is small. be able to.
  • the protrusion amount L of the lid 35, the outer diameter D of the lid 35, the thickness t of the lid 35, and the minimum distance h between the discharge pipe 27 and the insulating terminal 28 in the lid 35 Between them, so that the relationship of 0 ⁇ L / D ⁇ 0.25 and 1.4 ⁇ h / t ⁇ 2.2 is satisfied, the protrusion amount L, the outer diameter D, and the thickness t of the lid 35 , And the minimum interval h.
  • L / D is 0 or smaller than 0, the lid 35 can not project from the cylindrical portion 33, so it becomes difficult to secure the pressure resistance of the lid 35.
  • L / D is larger than 0.25, the pressure resistance of the lid 35 can be sufficiently ensured, but the protrusion amount L of the lid 35 from the cylindrical portion 33 becomes large, so the end after molding A lot of material is generated, which leads to an increase in the cost of the electric compressor 11. If L / D is larger than 0.25, drawing will be complicated. If L / D is larger than 0.25, drawing will be complicated.
  • the thickness t can be appropriately set, for example, within the range of 3 mm to 5 mm.
  • the outer diameter D can be appropriately set, for example, in the range of 100 mm to 130 mm.
  • the protrusion amount L can be set appropriately, for example, within the range of 15 mm to 25 mm.
  • the compression portion 22 is disposed in an internal space A located at a lower portion in the housing 21.
  • the compression unit 22 includes disk-shaped cylinders 45A and 45B, cylindrical piston rotors 47A and 47B, a blade (not shown), and a separator 49.
  • the disk-shaped cylinders 45A, 45B are arranged in two stages in the axial direction X.
  • a cylindrical cylinder inner wall surface 45S having an axis in the axial direction X is formed at the central portion of each of the cylinders 45A and 45B.
  • cylindrical piston rotors 47A, 47B having an outer diameter smaller than the inner diameter of the cylinder inner wall surface 45S are disposed.
  • the piston rotors 47A and 47B are fixed in the state of being inserted into the eccentric shaft portions 24A and 24B of the shaft 24 along the axis O 1 of the housing 21 respectively.
  • a space R having a crescent-shaped cross section is formed between the cylinder inner wall surface 45S of the cylinders 45A and 45B and the outer peripheral surface of the piston rotors 47A and 47B.
  • suction ports 45C into which the gas phase refrigerant in the accumulator 12 is introduced are formed in the cylinders 45A and 45B, respectively. That is, the compression unit 22 has two suction ports 45C.
  • a disk-shaped separator 49 is provided between the cylinders 45A and 45B.
  • the space R is divided into two by the separator 49. Specifically, the space R is partitioned by the separator 49 into a compression chamber R1 in the upper cylinder 45A and a compression chamber R2 in the lower cylinder 45B.
  • the cylinders 45A and 45B are provided with blades (not shown) that divide the compression chambers R1 and R2 into two respectively.
  • the blades are held in insertion grooves (not shown) formed to extend in the radial direction of the cylinders 45A and 45B in the cylinders 45A and 45B, respectively.
  • the blades are capable of advancing and retracting in directions approaching and separating from the piston rotors 47A and 47B.
  • the blade is pressed by a coil spring (not shown).
  • a discharge hole (not shown) for discharging the compressed gas phase refrigerant is formed at a predetermined position of the cylinder 45A, 45B, and a reed valve (not shown) is provided in the discharge hole. .
  • the compression section 22 configured as described above, when the gas-phase refrigerant is introduced into the compression chambers R1 and R2, the volumes of the compression chambers R1 and R2 gradually decrease due to the eccentric rolling of the piston rotors 47A and 47B.
  • the phase refrigerant is compressed.
  • the reed valve (not shown) is pushed open to discharge the compressed gas phase refrigerant (hereinafter referred to as "compressed refrigerant") to the outside of the cylinders 45A and 45B.
  • the compressed refrigerant is discharged from a discharge pipe 27 provided in the upper part of the housing 21 to a pipe provided outside the electric compressor system and connected to the discharge pipe 27.
  • the shaft 24 is rotatably supported around the axis of the shaft 24 by bearings 52A and 52B arranged vertically in the axial direction X.
  • the shaft 24 extends upward (axial direction X) from the upper bearing 52A.
  • the axis of the shaft 24 coincides with the axis O 1 of the housing 21.
  • Eccentric shaft portions 24A and 24B are formed on the shaft 24.
  • the eccentric shaft portions 24A, 24B are disposed inside the piston rotors 47A, 47B.
  • the eccentric shaft portions 24A, 24B are offset in a direction orthogonal to the axis of the shaft 24.
  • the outer diameters of the eccentric shaft portions 24A, 24B are configured to be slightly smaller than the inner diameters of the piston rotors 47A, 47B.
  • the motor unit 25 has a rotor 55 and a stator 56.
  • the rotor 55 is provided on the top of the shaft 24.
  • the stator 56 is disposed outside the rotor 55.
  • the stator 56 is fixed to the inner circumferential surface of the housing 21.
  • the motor unit 25 electrically drives the compression unit 22 via the shaft 24.
  • the discharge pipe 27 is fixed to the lid 35 by the brazing material 40 in a state of being inserted into the first through portion 41 as described above.
  • the discharge pipe 27 is a pipe for leading the compressed refrigerant generated by the compression unit 22 to the outside.
  • the discharge pipe 27 may be disposed, for example, at a position through which the axis O 1 of the housing 21 passes.
  • the insulating terminal 28 is fixed to the lid 35 in a state of being inserted into the second through portion 42.
  • a glass terminal can be used as the insulating terminal 28.
  • the conductive terminal pin 29 is disposed to penetrate the insulating terminal 28.
  • the conductive terminal pin 29 protrudes in the vertical direction of the insulating terminal 28.
  • the upper end of the conductive terminal pin 29 is connected to a power supply (not shown).
  • the power supply cable 31 is connected to the lower end of the conductive terminal pin 29, and the other end is connected to the stator 56.
  • the power cable 31 is a cable for supplying power to the stator 56.
  • the accumulator 12 is fixed to the cylindrical portion 33 by a fixing means such as welding or a bolt via a plate-like bracket 15.
  • the accumulator 12 has a suction port 12A at its upper end for sucking the refrigerant.
  • the accumulator 12 takes in the refrigerant from the suction port 12A and separates the refrigerant into gas and liquid.
  • a high pressure refrigerant containing R32 or CO 2 may be used. Even when such a high-pressure refrigerant is used, the pressure resistance of the lid 35 can be secured while suppressing the cost increase.
  • One end of the suction pipe 13 reaches the gas phase in the accumulator 12, and the other end is connected to a suction port 45 ⁇ / b> C disposed in the lower part of the compression section 22.
  • the suction pipe 13 supplies the gas phase refrigerant in the accumulator 12 to the compression chamber R2 of the cylinder 45B.
  • One end of the suction pipe 14 reaches the gas phase in the accumulator 12, and the other end is connected to a suction port 45 ⁇ / b> C disposed above the compression section 22.
  • the suction pipe 14 supplies the gas phase refrigerant in the accumulator 12 to the compression chamber R1 of the cylinder 45A.
  • FIG. 1 illustrates the case where two suction pipes 13 and 14 are provided between accumulator 12 and compression unit 22 as an example, only one suction pipe may be provided. .
  • the protrusion amount L of the lid 35, the outer diameter D of the lid 35, the thickness t of the lid 35, and the minimum of the discharge pipe 27 and the insulating terminal 28 in the lid 35 The protrusion amount L, the outer diameter D, and the lid portion 35 are set such that the relationship of 0 ⁇ L / D ⁇ 0.25 and 1.4 ⁇ h / t ⁇ 2.2 is satisfied with the interval h.
  • the thickness t and the minimum distance h it is possible to secure the pressure resistance of the lid 35 while suppressing the increase in cost.
  • At least one of the housings 21 may be an open end.
  • the present invention is applicable to a motor-driven compressor.

Abstract

The present invention comprises: a housing (21) that includes a cylindrical part (33) and a lid part (35); a compression unit provided inside the housing (21); and an electric unit provided inside the housing (21), such that when the projection amount of the lid part (35) from the cylindrical part (33) is defined as L, the outer diameter of the lid part (35) is defined as D, the thickness of the lid part (35) is defined as t, and the minimum gap between a discharge tube (27) disposed in a first passage part (41) and an insulation terminal (28) disposed in a second passage part (42) is defined as h, then: 0 < L/D ≤ 0.25, and 1.4 ≤ h/t ≤2.2.

Description

電動圧縮機Electric compressor
　本発明は、電動圧縮機に関する。
　本願は、２０１７年１２月８日に、日本に出願された特願２０１７－２３６１５７号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a motor-driven compressor.
Priority is claimed on Japanese Patent Application No. 2017-236157, filed Dec. 8, 2017, the content of which is incorporated herein by reference.
　電動圧縮機には、気密された空間を区画するハウジングと、ハウジング内に収容された圧縮部及び電動部と、吐出管と、絶縁端子（気密端子）と、を有するものがある（例えば、特許文献１参照。）。
　特許文献１に開示された電動圧縮機のハウジングは、両端が開放端とされた筒状部と、筒状部の一方の端を塞ぐ蓋部と、筒状部の他方の端を塞ぐ底部と、を有する。
　蓋部は、その一部が筒状部の軸線方向に突出して配置されている。蓋部には、吐出管が挿入される第１の貫通部と、絶縁端子（気密端子）が配置される第２の貫通部と、が形成されている。 Some electric compressors have a housing that defines an airtight space, a compression unit and an electric unit accommodated in the housing, a discharge pipe, and an insulation terminal (airtight terminal) (for example, a patent) Reference 1.).
The housing of the electric compressor disclosed in Patent Document 1 has a cylindrical portion whose both ends are open ends, a lid portion closing one end of the cylindrical portion, and a bottom portion closing the other end of the cylindrical portion. And.
A part of the lid portion is arranged to protrude in the axial direction of the cylindrical portion. The lid portion is formed with a first through portion into which the discharge pipe is inserted, and a second through portion through which the insulating terminal (airtight terminal) is disposed.
特開平６－１７７８０号公報JP 6-17780 A
　ところで、蓋部の耐圧強度を確保するために、第１の貫通部と第２の貫通部との間における最小間隔は大きいことが好ましい。
　しかしながら、ハウジングの軸線が通過する位置に吐出管を配置させることが一般的であるため、第１の貫通部と第２の貫通部との間における最小間隔が小さくなりやすく、蓋部の耐圧強度を確保することが困難であった。 By the way, in order to secure the pressure resistance strength of the lid, it is preferable that the minimum distance between the first penetrating portion and the second penetrating portion be large.
However, since it is general to arrange the discharge pipe at a position where the axis of the housing passes, the minimum distance between the first through portion and the second through portion tends to be small, and the pressure resistance of the lid portion It was difficult to secure.
　また、蓋部のうち、筒状部から突出した部分の形状が球形に近いと、蓋部の耐圧強度が高くなる。しかし、筒状部から突出する蓋部の突出量が大きくなるため、成形後の端材が多く発生し、電動圧縮機のコスト上昇につながるという問題があった。 In addition, when the shape of the portion of the lid portion that protrudes from the cylindrical portion is close to a spherical shape, the pressure resistance of the lid portion increases. However, since the amount of protrusion of the lid portion protruding from the cylindrical portion becomes large, a large amount of scraps after molding may be generated, which leads to an increase in the cost of the electric compressor.
　そこで、本発明は、コストの上昇を抑制した上で、蓋部の耐圧強度を確保することの可能な電動圧縮機を提供することを目的とする。 Then, an object of this invention is to provide the electric compressor which can ensure the pressure resistance of a cover part, suppressing the raise of cost.
　上記課題を解決するため、本発明の一態様に係る電動圧縮機は、少なくとも一方が開放端とされた筒状部、並びに吐出管が配置される第１の貫通部、及び絶縁端子が配置される第２の貫通部が形成され、前記筒状部の一端と接続されるとともに、該筒状部から該筒状部の延在方向に突出する蓋部を含み、内部空間を区画するハウジングと、前記ハウジング内に設けられ、冷媒を圧縮して、圧縮冷媒を生成するとともに、該圧縮冷媒を前記吐出管が配置された前記内部空間に吐出する圧縮部と、前記ハウジング内に設けられ、前記圧縮部を電動駆動させる電動部と、を備え、前記筒状部からの前記蓋部の突出量をＬ、該蓋部の外径をＤ、前記蓋部の厚さをｔとし、前記蓋部における前記吐出管と前記絶縁端子との最小間隔をｈとした場合、０＜Ｌ／Ｄ≦０．２５で、かつ１．４≦ｈ／ｔ≦２．２である。 In order to solve the above problems, in the electric compressor according to one aspect of the present invention, a cylindrical portion at least one of which is an open end, a first through portion where the discharge pipe is disposed, and an insulation terminal are disposed. A housing which is formed with a second penetrating portion and connected to one end of the cylindrical portion and includes a lid portion projecting from the cylindrical portion in the extending direction of the cylindrical portion, and which divides an internal space; A compression unit provided in the housing to compress the refrigerant to generate a compressed refrigerant and discharging the compressed refrigerant into the internal space in which the discharge pipe is disposed; and a compression unit provided in the housing, An electric part for electrically driving the compression part, wherein the amount of projection of the lid from the cylindrical part is L, the outer diameter of the lid is D, and the thickness of the lid is t, the lid 0 if the minimum distance between the discharge pipe and the insulation terminal at In L / D ≦ 0.25, and is 1.4 ≦ h / t ≦ 2.2.
　例えば、Ｌ／Ｄが０または０よりも小さいと筒状部から蓋部を突出させることができないため、蓋部の耐圧強度を確保することが困難となってしまう。
　Ｌ／Ｄが０．２５より大きいと、蓋部の耐圧強度を十分確保することが可能であるが、筒状部からの蓋部の突出量が大きくなるため、成形後の端材が多く発生して、電動圧縮機のコストの上昇につながってしまう。また、Ｌ／Ｄが０．２５より大きいと、絞り加工が複雑になってしまう。 For example, if L / D is smaller than 0 or 0, the lid can not be protruded from the cylindrical portion, so that it becomes difficult to secure the pressure resistance of the lid.
When L / D is larger than 0.25, it is possible to secure sufficient compressive strength of the lid, but since the amount of protrusion of the lid from the cylindrical portion becomes large, many scraps after molding occur Will lead to an increase in the cost of the electric compressor. If L / D is larger than 0.25, drawing will be complicated.
　また、ｈ／ｔが１．４よりも小さいと、第１の貫通部と第２の貫通部との間に配置された蓋部の強度を確保することが困難となる。
　ｈ／ｔが２．２よりも大きいと、吐出管と絶縁端子との間隔が大きくなり、ハウジ　ングの大型化により、ハウジングの重量の増加やコストの増加を招く恐れがある。
　したがって、本発明によれば、０＜Ｌ／Ｄ≦０．２５で、かつ１．４≦ｈ／ｔ≦２．２を満たすように、蓋部の突出量Ｌ、蓋部の外径Ｄ、蓋部の厚さｔ、及び蓋部における吐出管と絶縁端子との最小間隔ｈを設定することで、コストの上昇を抑制した上で、蓋部の耐圧強度を確保することができる。 In addition, when h / t is smaller than 1.4, it becomes difficult to secure the strength of the lid portion disposed between the first penetration portion and the second penetration portion.
If h / t is larger than 2.2, the distance between the discharge pipe and the insulating terminal becomes large, and the housing becomes large, which may increase the weight and cost of the housing.
Therefore, according to the present invention, the amount L of protrusion of the lid, the outer diameter D of the lid, so as to satisfy 0 <L / D ≦ 0.25 and 1.4 ≦ h / t ≦ 2.2. By setting the thickness t of the lid and the minimum distance h between the discharge pipe and the insulating terminal in the lid, it is possible to secure the pressure resistance of the lid while suppressing the cost increase.
　また、上記本発明の一態様に係る電動圧縮機において、前記吐出管は、前記ハウジングの軸線が通過する位置に配置させてもよい。 In the electric compressor according to one aspect of the present invention, the discharge pipe may be disposed at a position through which the axis of the housing passes.
　このような位置（吐出管と絶縁端子との間（第１の貫通部と第２の貫通部との間）の最小間隔が近くなりやすい位置）に吐出管を配置させた場合でもコストの上昇を抑制した上で、蓋部の耐圧強度を確保することができる。 Even when the discharge pipe is disposed at such a position (a position where the minimum distance between the discharge pipe and the insulating terminal (the first through portion and the second through portion is likely to be close)), the cost increases. The pressure resistance of the lid can be secured.
　また、上記本発明の一態様に係る電動圧縮機において、前記吐出管は、前記蓋部の外面に配置されたろう材により、前記蓋部にろう付けされており、前記第１の貫通部を区画する前記蓋部の外面側に面取り部を形成するとともに、該面取り部に前記ろう材を配置させてもよい。 In the electric compressor according to one aspect of the present invention, the discharge pipe is brazed to the lid by a brazing material disposed on an outer surface of the lid, and the first through portion is partitioned. The chamfer may be formed on the outer surface side of the lid, and the brazing material may be disposed on the chamfer.
　このように、第１の貫通部を区画する蓋部の外面側に面取り部を形成するとともに、面取り部にろう材を配置させることで、蓋部及び吐出管とろう材との間の接触面積を増加させることが可能となる。これにより、蓋部と吐出管との間の接続強度を高めることが可能となるので、蓋部の突出量が少ない場合でも蓋部の耐圧強度を高めることができる。 As described above, the chamfered portion is formed on the outer surface side of the lid portion that defines the first through portion, and the brazing material is disposed in the chamfered portion, whereby the contact area between the lid portion and the discharge pipe and the brazing material It is possible to increase the This makes it possible to increase the connection strength between the lid and the discharge pipe, so that the pressure resistance of the lid can be increased even when the amount of protrusion of the lid is small.
　また、上記本発明の一態様に係る電動圧縮機において、前記ハウジングの材料は、引張強度が４００Ｎ／ｍｍ２以上であってもよい。 In the electric compressor according to one aspect of the present invention, the material of the housing may have a tensile strength of 400 N / mm 2 or more.
　ハウジングの材料の引張強度が４００Ｎ／ｍｍ２よりも小さいとハウジングの強度を高めることが困難な恐れがある。
　したがって、ハウジングの材料の引張強度が４００Ｎ／ｍｍ２以上とすることで、ハウジングの強度を高めることが可能となり、蓋部の突出量が小さい場合でも蓋部の耐圧強度を高めることができる。 If the tensile strength of the material of the housing is less than 400 N / mm 2, it may be difficult to increase the strength of the housing.
Therefore, by setting the tensile strength of the material of the housing to 400 N / mm 2 or more, the strength of the housing can be enhanced, and the pressure resistance of the lid can be enhanced even when the amount of protrusion of the lid is small.
　また、上記本発明の一態様に係る電動圧縮機において、前記冷媒は、Ｒ３２またはＣＯ２を含む高圧冷媒であってもよい。 Further, in the electric compressor according to an embodiment of the present invention, the refrigerant may be a high-pressure refrigerant containing R32 or CO 2.
　このような高圧冷媒を使用した場合でもコストの上昇を抑制した上で、蓋部の耐圧強度を確保することができる。 Even when such a high-pressure refrigerant is used, the pressure resistance of the lid can be secured while suppressing the cost increase.
　本発明によれば、電動圧縮機のコストの上昇を抑制した上で、蓋部の耐圧強度を確保することができる。 According to the present invention, it is possible to secure the pressure resistance of the lid while suppressing the increase in the cost of the electric compressor.
本発明の実施形態に係る電動圧縮機システムの概略構成を示す断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows schematic structure of the electric compressor system which concerns on embodiment of this invention. 図１に示す電装圧縮機のうち、領域Ｂで囲まれた部分を拡大した断面図である。It is sectional drawing to which the part enclosed with area | region B was expanded among the electrically equipped compressors shown in FIG. 図１に示す電動圧縮機をＣ視した平面図である。It is the top view which looked at the electric compressor shown in FIG. 1C.
　以下、図面を参照して本発明を適用した実施形態について詳細に説明する。
　（実施形態）
　図１～図３を参照して、本実施形態の電動圧縮機１１を備えた圧縮機システム１０について説明する。図１では、電動圧縮機１１の一例として、ロータリ圧縮機を例に挙げて図示する。
　図１において、Ｏ１はハウジング２１の軸線（以下、「軸線Ｏ１」という）、Ｘはハウジング２１の軸線方向（以下、「軸線方向Ｘ」という）、Ｌは筒状部３３の一端面２１ａ（上端面）を基準としたときの軸線方向Ｘにおける蓋部３５の突出量（以下、「突出量Ｌ」という）をそれぞれ示している。軸線方向Ｘは、筒状部３３の延在方向でもある。 Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings.
(Embodiment)
A compressor system 10 provided with the motor-driven compressor 11 according to the present embodiment will be described with reference to FIGS. 1 to 3. In FIG. 1, a rotary compressor is illustrated as an example of the motor-driven compressor 11.
In FIG. 1, O 1 is an axial line of the housing 21 (hereinafter referred to as “axial line O 1 ”), X is an axial direction of the housing 21 (hereinafter referred to as “axial direction X”), and L is one end face 21 a of the cylindrical portion 33 The amount of protrusion of the lid portion 35 in the axial direction X (hereinafter referred to as “the amount of protrusion L”) with respect to the (upper end surface) is shown. The axial direction X is also the extending direction of the cylindrical portion 33.
　また、図１において、Ｄは蓋部３５のうち、筒状部３３から突出した部分の外径Ｄ、ｔは第１の貫通部４１と第２の貫通部４２との間（言い換えれば、絶縁端子２８と吐出管２７との間）に配置された蓋部３５（蓋部本体３８）の厚さ（以下、「厚さｔ」という）をそれぞれ示している。 Further, in FIG. 1, D is an outer diameter D of a portion of the lid 35 which protrudes from the cylindrical portion 33, and t is between the first penetrating portion 41 and the second penetrating portion 42 (in other words, insulation The thickness (hereinafter referred to as “thickness t”) of the lid 35 (lid main body 38) disposed between the terminal 28 and the discharge pipe 27 is shown.
　さらに、図１において、ｈは蓋部３５が配置された部分における絶縁端子２８と吐出管２７との最小間隔（以下、「最小間隔ｈ」という）、Ｂは領域（以下、「領域Ｂ」という）をそれぞれ示している。
　なお、最小間隔ｈは、蓋部３５の内面３５ｂ（蓋部本体３８の内面３８ｂ）における吐出管２７と絶縁端子２８との最小間隔（第１の貫通部４１と第２の貫通部４２との最小間隔）を示している。 Further, in FIG. 1, h is a minimum distance between the insulating terminal 28 and the discharge pipe 27 in the portion where the lid 35 is disposed (hereinafter referred to as "minimum distance h"), and B is a region (hereinafter referred to as "region B"). ) Are shown respectively.
The minimum distance h is the minimum distance between the discharge pipe 27 and the insulating terminal 28 on the inner surface 35b of the lid 35 (the inner surface 38b of the lid body 38) (the first through portion 41 and the second through portion 42). Minimum interval) is shown.
　圧縮機システム１０は、電動圧縮機１１と、アキュムレータ１２と、吸入管１３，１４と、を有する。
　電動圧縮機１１は、ハウジング２１と、圧縮部２２と、シャフト２４と、電動部２５と、吐出管２７と、絶縁端子２８（気密端子）と、導電端子ピン２９と、電源ケーブル３１と、を有する。 The compressor system 10 includes an electric compressor 11, an accumulator 12, and suction pipes 13 and 14.
The electric compressor 11 includes a housing 21, a compression unit 22, a shaft 24, an electric unit 25, a discharge pipe 27, an insulation terminal 28 (airtight terminal), a conductive terminal pin 29, and a power cable 31. Have.
　ハウジング２１は、密閉型のハウジングであり、内部空間Ａを区画している。ハウジング２１は、筒状部３３と、底部３４と、蓋部３５と、を有する。
　筒状部３３は、両端（上下端）が開放端とされた円筒状の部材である。
　底部３４は、一部がハウジング２１の他端（下端）に挿入された状態で、筒状部３３と接続されている。これにより、底部３４は、ハウジング２１の他端を塞いでいる。底部３４は、筒状部３３の下方（軸線方向Ｘ）に突出している。 The housing 21 is a closed housing and defines an internal space A. The housing 21 has a tubular portion 33, a bottom 34, and a lid 35.
The cylindrical portion 33 is a cylindrical member whose both ends (upper and lower ends) are open ends.
The bottom portion 34 is connected to the cylindrical portion 33 in a state where a portion is inserted into the other end (lower end) of the housing 21. Thus, the bottom 34 closes the other end of the housing 21. The bottom portion 34 protrudes downward (in the axial direction X) of the cylindrical portion 33.
　蓋部３５は、蓋部本体３８と、第１の貫通部４１と、第２の貫通部４２と、を有する。
　蓋部本体３８は、一部がハウジング２１の一端（上端）に挿入された状態で、筒状部３３と接続されている。これにより、蓋部本体３８は、ハウジング２１の一端を塞いでいる。蓋部本体３８は、筒状部３３の上方（軸線方向Ｘ）に突出している。 The lid 35 has a lid body 38, a first penetrating portion 41, and a second penetrating portion 42.
The lid main body 38 is connected to the cylindrical portion 33 in a state where a portion thereof is inserted into one end (upper end) of the housing 21. Thereby, the lid body 38 closes one end of the housing 21. The lid main body 38 protrudes above the axial direction 33 (axial direction X).
　第１の貫通部４１は、蓋部本体３８を貫通するように形成されている。第１の貫通部４１は、ハウジング２１の軸線Ｏ１が通過する位置に配置されている。第１の貫通部４１には、軸線方向Ｘに延在する吐出管２７が挿入されている。
　第１の貫通部４１を区画する蓋部本体３８の外面３８ａ（蓋部３５の外面３５ａ）側には、蓋部本体３８の内面から外面３８ａに向かうにつれて拡径するとともに、傾斜面を有する面取り部３９が形成されている。
　第１の貫通部４１に挿入された吐出管２７は、面取り部３９、及び面取り部３９の周囲の外面３８ａに配置されたろう材４０により、蓋部本体３８にろう付けされている。 The first penetration portion 41 is formed to penetrate the lid main body 38. The first through portion 41 is disposed at a position through which the axis O 1 of the housing 21 passes. A discharge pipe 27 extending in the axial direction X is inserted into the first through portion 41.
The outer surface 38a (the outer surface 35a of the lid 35) of the lid main body 38 defining the first through portion 41 has a chamfer having an inclined surface while expanding in diameter from the inner surface of the lid main body 38 toward the outer surface 38a. The part 39 is formed.
The discharge pipe 27 inserted into the first through portion 41 is brazed to the lid main body 38 by the chamfer 39 and the brazing material 40 disposed on the outer surface 38 a around the chamfer 39.
　このように、第１の貫通部４１を区画する蓋部本体３８の外面３８ａ側に面取り部３９を形成するとともに、面取り部３９にろう材４０を配置させることで、蓋部３５及び吐出管２７とろう材４０との間の接触面積を増加させることが可能となる。これにより、蓋部３５と吐出管２７との間の接続強度を高めることが可能となるので、蓋部３５の突出量Ｌが少ない場合でも蓋部３５の耐圧強度を高めることができる。 As described above, the chamfer 39 is formed on the outer surface 38 a side of the lid main body 38 that divides the first through portion 41, and the brazing material 40 is disposed in the chamfer 39, whereby the lid 35 and the discharge pipe 27 are formed. It is possible to increase the contact area with the brazing material 40. As a result, the connection strength between the lid 35 and the discharge pipe 27 can be increased, so that the pressure resistance of the lid 35 can be increased even when the amount L of protrusion of the lid 35 is small.
　第２の貫通部４２は、第１の貫通部４１の外側に位置する蓋部本体３８を貫通するように形成されている。第２の貫通部４２には、絶縁端子２８が挿入されている。絶縁端子２８は、蓋部本体３８に固定されている。 The second penetration portion 42 is formed to penetrate the lid main body 38 located outside the first penetration portion 41. An insulating terminal 28 is inserted in the second through portion 42. The insulating terminal 28 is fixed to the lid body 38.
　上記構成とされたハウジング２１の材料としては、例えば、引張強度が４００Ｎ／ｍｍ２以上の材料（例えば、ＳＳ４００材）を用いることが好ましい。 As a material of the housing 21 made into the said structure, it is preferable to use a material (for example, SS400 material) whose tensile strength is 400 N / mm < 2 > or more, for example.
　ハウジング２１の材料の引張強度が４００Ｎ／ｍｍ２よりも小さいとハウジング２１の強度を高めることが困難な恐れがある。
　したがって、ハウジング２１の材料の引張強度が４００Ｎ／ｍｍ２以上とすることで、ハウジング２１の強度を高めることが可能となり、蓋部３５の突出量Ｌが小さい場合でも蓋部３５の耐圧強度を高めることができる。 If the tensile strength of the material of the housing 21 is smaller than 400 N / mm 2, it may be difficult to increase the strength of the housing 21.
Therefore, by setting the tensile strength of the material of the housing 21 to 400 N / mm 2 or more, the strength of the housing 21 can be increased, and the pressure resistance of the cover 35 is increased even when the amount L of the cover 35 is small. be able to.
　上記構成とされたハウジング２１では、蓋部３５の突出量Ｌ、蓋部３５の外径Ｄ、蓋部３５の厚さｔ、蓋部３５における吐出管２７と絶縁端子２８との最小間隔ｈとの間において、０＜Ｌ／Ｄ≦０．２５で、かつ１．４≦ｈ／ｔ≦２．２の関係が満たされるように、突出量Ｌ、外径Ｄ、蓋部３５の厚さｔ、及び最小間隔ｈを設定する。 In the housing 21 configured as described above, the protrusion amount L of the lid 35, the outer diameter D of the lid 35, the thickness t of the lid 35, and the minimum distance h between the discharge pipe 27 and the insulating terminal 28 in the lid 35 Between them, so that the relationship of 0 <L / D ≦ 0.25 and 1.4 ≦ h / t ≦ 2.2 is satisfied, the protrusion amount L, the outer diameter D, and the thickness t of the lid 35 , And the minimum interval h.
　例えば、Ｌ／Ｄが０または０よりも小さいと筒状部３３から蓋部３５を突出させることができないため、蓋部３５の耐圧強度を確保することが困難となってしまう。
　Ｌ／Ｄが０．２５より大きいと、蓋部３５の耐圧強度を十分確保することが可能であるが、筒状部３３からの蓋部３５の突出量Ｌが大きくなるため、成形後の端材が多く発生して、電動圧縮機１１のコストの上昇につながってしまう。また、Ｌ／Ｄが０．２５より大きいと、絞り加工が複雑になってしまう。また、Ｌ／Ｄが０．２５より大きいと、絞り加工が複雑になってしまう。 For example, if L / D is 0 or smaller than 0, the lid 35 can not project from the cylindrical portion 33, so it becomes difficult to secure the pressure resistance of the lid 35.
When L / D is larger than 0.25, the pressure resistance of the lid 35 can be sufficiently ensured, but the protrusion amount L of the lid 35 from the cylindrical portion 33 becomes large, so the end after molding A lot of material is generated, which leads to an increase in the cost of the electric compressor 11. If L / D is larger than 0.25, drawing will be complicated. If L / D is larger than 0.25, drawing will be complicated.
　また、ｈ／ｔが１．４よりも小さいと、第１の貫通部４１と第２の貫通部４２との間に配置された蓋部３５の強度を確保することが困難となる。
　ｈ／ｔが２．２よりも大きいと、吐出管２７と絶縁端子２８との間隔が大きくなり、ハウジング２１の大型化により、ハウジング２１の重量の増加やコストの増加を招く恐れがある。
　したがって、０＜Ｌ／Ｄ≦０．２５で、かつ１．４≦ｈ／ｔ≦２．２を満たすように、蓋部３５の突出量Ｌ、蓋部３５の外径Ｄ、蓋部３５の厚さｔ、及び蓋部３５における吐出管２７と端子との最小間隔ｈを設定することで、コストの上昇を抑制した上で、蓋部３５の耐圧強度を確保することができる。 In addition, when h / t is smaller than 1.4, it becomes difficult to secure the strength of the lid portion 35 disposed between the first penetration portion 41 and the second penetration portion 42.
If h / t is larger than 2.2, the distance between the discharge pipe 27 and the insulating terminal 28 becomes large, and the enlargement of the housing 21 may lead to an increase in the weight and cost of the housing 21.
Therefore, the protrusion amount L of the lid portion 35, the outer diameter D of the lid portion 35, and the lid portion 35 so that 0 <L / D ≦ 0.25 and 1.4 ≦ h / t ≦ 2.2 are satisfied. By setting the thickness t and the minimum distance h between the discharge pipe 27 and the terminal in the lid portion 35, it is possible to secure the pressure resistance of the lid portion 35 while suppressing the increase in cost.
　なお、厚さｔは、例えば、３ｍｍ～５ｍｍの範囲内で適宜設定することができる。外径Ｄは、例えば、１００ｍｍ～１３０ｍｍの範囲内で適宜設定することが可能である。突出量Ｌは、例えば、１５ｍｍ～２５ｍｍの範囲内で適宜設定することが可能である。 The thickness t can be appropriately set, for example, within the range of 3 mm to 5 mm. The outer diameter D can be appropriately set, for example, in the range of 100 mm to 130 mm. The protrusion amount L can be set appropriately, for example, within the range of 15 mm to 25 mm.
　圧縮部２２は、ハウジング２１内の下部に位置する内部空間Ａに配置されている。圧縮部２２は、ディスク状のシリンダ４５Ａ，４５Ｂと、円筒状のピストンロータ４７Ａ，４７Ｂと、ブレード（図示せず）と、セパレータ４９と、を有する。 The compression portion 22 is disposed in an internal space A located at a lower portion in the housing 21. The compression unit 22 includes disk-shaped cylinders 45A and 45B, cylindrical piston rotors 47A and 47B, a blade (not shown), and a separator 49.
　ディスク状のシリンダ４５Ａ，４５Ｂは、軸線方向Ｘにおいて２段となるように配置されている。シリンダ４５Ａ，４５Ｂの中央部には、それぞれ軸線方向Ｘに軸線を有する円筒状のシリンダ内壁面４５Ｓが形成されている。 The disk-shaped cylinders 45A, 45B are arranged in two stages in the axial direction X. A cylindrical cylinder inner wall surface 45S having an axis in the axial direction X is formed at the central portion of each of the cylinders 45A and 45B.
　シリンダ４５Ａ，４５Ｂの内側には、シリンダ内壁面４５Ｓの内径よりも小さな外径を有する円筒状のピストンロータ４７Ａ，４７Ｂが配置されている。
　ピストンロータ４７Ａ，４７Ｂは、ハウジング２１の軸線Ｏ１に沿ったシャフト２４の偏心軸部２４Ａ、２４Ｂにそれぞれ挿入された状態で固定されている。これにより、シリンダ４５Ａ，４５Ｂのシリンダ内壁面４５Ｓとピストンロータ４７Ａ，４７Ｂの外周面との間には、それぞれ三日月状の断面を有する空間Ｒが形成されている。
　また、シリンダ４５Ａ，４５Ｂには、アキュムレータ１２内の気相冷媒が導入される吸入ポート４５Ｃがそれぞれ形成されている。つまり、圧縮部２２は、２つの吸入ポート４５Ｃを有する。 Inside the cylinders 45A, 45B, cylindrical piston rotors 47A, 47B having an outer diameter smaller than the inner diameter of the cylinder inner wall surface 45S are disposed.
The piston rotors 47A and 47B are fixed in the state of being inserted into the eccentric shaft portions 24A and 24B of the shaft 24 along the axis O 1 of the housing 21 respectively. Thus, a space R having a crescent-shaped cross section is formed between the cylinder inner wall surface 45S of the cylinders 45A and 45B and the outer peripheral surface of the piston rotors 47A and 47B.
In addition, suction ports 45C into which the gas phase refrigerant in the accumulator 12 is introduced are formed in the cylinders 45A and 45B, respectively. That is, the compression unit 22 has two suction ports 45C.
　シリンダ４５Ａ，４５Ｂの間には、ディスク状のセパレータ４９が設けられている。セパレータ４９により、空間Ｒが２つに仕切られている。具体的には、セパレータ４９により空間Ｒは、上段側のシリンダ４５Ａ内の圧縮室Ｒ１と、下段側のシリンダ４５Ｂ内の圧縮室Ｒ２と、に仕切られている。 A disk-shaped separator 49 is provided between the cylinders 45A and 45B. The space R is divided into two by the separator 49. Specifically, the space R is partitioned by the separator 49 into a compression chamber R1 in the upper cylinder 45A and a compression chamber R2 in the lower cylinder 45B.
　シリンダ４５Ａ，４５Ｂには、圧縮室Ｒ１、Ｒ２をそれぞれ２つに区切るブレード（図示せず）が設けられている。ブレードは、シリンダ４５Ａ，４５Ｂのそれぞれにおいて、シリンダ４５Ａ，４５Ｂの径方向に延在して形成された挿入溝（図示せず）に保持されている。ブレードは、ピストンロータ４７Ａ，４７Ｂに対して接近及び離間する方向に進退自在な可能な構成とされている。ブレードは、コイルバネ（図示せず）により押圧されている。
　シリンダ４５Ａ，４５Ｂの所定の位置には、圧縮された気相冷媒を吐出する吐出穴（図示せず）が形成されており、該吐出穴にはリード弁（図示せず）が設けられている。 The cylinders 45A and 45B are provided with blades (not shown) that divide the compression chambers R1 and R2 into two respectively. The blades are held in insertion grooves (not shown) formed to extend in the radial direction of the cylinders 45A and 45B in the cylinders 45A and 45B, respectively. The blades are capable of advancing and retracting in directions approaching and separating from the piston rotors 47A and 47B. The blade is pressed by a coil spring (not shown).
A discharge hole (not shown) for discharging the compressed gas phase refrigerant is formed at a predetermined position of the cylinder 45A, 45B, and a reed valve (not shown) is provided in the discharge hole. .
　上記構成とされた圧縮部２２では、圧縮室Ｒ１、Ｒ２に気相冷媒が導入されると、ピストンロータ４７Ａ，４７Ｂの偏心転動により、圧縮室Ｒ１、Ｒ２の容積が徐々に減少して気相冷媒が圧縮される。
　そして、圧縮された冷媒の圧力が高まると、リード弁（図示せず）を押し開かれて、シリンダ４５Ａ，４５Ｂの外部に圧縮された気相冷媒（以下、「圧縮冷媒」という）が吐出される。
　圧縮冷媒は、ハウジング２１の上部に設けられた吐出管２７から電動圧縮機システムの外部に設けられ、かつ吐出管２７と接続された配管内に排出される。 In the compression section 22 configured as described above, when the gas-phase refrigerant is introduced into the compression chambers R1 and R2, the volumes of the compression chambers R1 and R2 gradually decrease due to the eccentric rolling of the piston rotors 47A and 47B. The phase refrigerant is compressed.
Then, when the pressure of the compressed refrigerant increases, the reed valve (not shown) is pushed open to discharge the compressed gas phase refrigerant (hereinafter referred to as "compressed refrigerant") to the outside of the cylinders 45A and 45B. Ru.
The compressed refrigerant is discharged from a discharge pipe 27 provided in the upper part of the housing 21 to a pipe provided outside the electric compressor system and connected to the discharge pipe 27.
　シャフト２４は、軸線方向Ｘにおいて上下に配置された軸受５２Ａ、５２Ｂにより、シャフト２４の軸線周りに回動自在に支持されている。
　シャフト２４は、上側の軸受５２Ａから上方（軸線方向Ｘ）に突出して延びている。シャフト２４の軸線は、ハウジング２１の軸線Ｏ１と一致している。 The shaft 24 is rotatably supported around the axis of the shaft 24 by bearings 52A and 52B arranged vertically in the axial direction X.
The shaft 24 extends upward (axial direction X) from the upper bearing 52A. The axis of the shaft 24 coincides with the axis O 1 of the housing 21.
　シャフト２４には、偏心軸部２４Ａ、２４Ｂが形成されている。偏心軸部２４Ａ、２４Ｂは、ピストンロータ４７Ａ，４７Ｂの内側に配置されている。偏心軸部２４Ａ、２４Ｂは、シャフト２４の軸線から直交する方向にオフセットされている。 Eccentric shaft portions 24A and 24B are formed on the shaft 24. The eccentric shaft portions 24A, 24B are disposed inside the piston rotors 47A, 47B. The eccentric shaft portions 24A, 24B are offset in a direction orthogonal to the axis of the shaft 24.
　偏心軸部２４Ａ、２４Ｂの外径は、ピストンロータ４７Ａ，４７Ｂの内径よりもわずかに小さくなるように構成されている。これにより、シャフト２４が回転すると、偏心軸部２４Ａ、２４Ｂがシャフト２４の軸線周りに旋回し、上下のピストンロータ４７Ａ，４７Ｂがシリンダ４５Ａ，４５Ｂ内で偏心転動する。
　このとき、ブレードがコイルバネにより押圧されているため、先端部は、ピストンロータ４７Ａ，４７Ｂの動きに追従して進退し、ピストンロータ４７Ａ，４７Ｂに常に押し付けられる。 The outer diameters of the eccentric shaft portions 24A, 24B are configured to be slightly smaller than the inner diameters of the piston rotors 47A, 47B. Thereby, when the shaft 24 rotates, the eccentric shaft portions 24A and 24B turn around the axis of the shaft 24, and the upper and lower piston rotors 47A and 47B eccentrically roll in the cylinders 45A and 45B.
At this time, since the blade is pressed by the coil spring, the tip moves forward and backward following the movement of the piston rotors 47A and 47B, and is always pressed against the piston rotors 47A and 47B.
　電動部２５は、ロータ５５と、ステータ５６と、を有する。ロータ５５は、シャフト２４の上部に設けられている。ステータ５６は、ロータ５５の外側に配置されている。ステータ５６は、ハウジング２１の内周面に固定されている。電動部２５は、シャフト２４を介して、圧縮部２２を電動駆動させる。 The motor unit 25 has a rotor 55 and a stator 56. The rotor 55 is provided on the top of the shaft 24. The stator 56 is disposed outside the rotor 55. The stator 56 is fixed to the inner circumferential surface of the housing 21. The motor unit 25 electrically drives the compression unit 22 via the shaft 24.
　吐出管２７は、上述したように第１の貫通部４１に挿入された状態で、ろう材４０により蓋部３５に固定されている。吐出管２７は、圧縮部２２により生成された圧縮冷媒を外部に導出するための管である。
　吐出管２７は、例えば、ハウジング２１の軸線Ｏ１が通過する位置に配置させてもよい。 The discharge pipe 27 is fixed to the lid 35 by the brazing material 40 in a state of being inserted into the first through portion 41 as described above. The discharge pipe 27 is a pipe for leading the compressed refrigerant generated by the compression unit 22 to the outside.
The discharge pipe 27 may be disposed, for example, at a position through which the axis O 1 of the housing 21 passes.
　このような位置（吐出管２７と絶縁端子２８との間（第１の貫通部４１と第２の貫通部４２との間）の最小間隔ｈが近くなりやすい位置）に吐出管２７を配置させた場合でもコストの上昇を抑制した上で、蓋部３５の耐圧強度を確保することができる。 Dispose the discharge pipe 27 at such a position (a position where the minimum distance h between the discharge pipe 27 and the insulating terminal 28 (the first through portion 41 and the second through portion 42 is likely to be close)) Even in this case, the pressure resistance of the lid 35 can be secured while suppressing the cost increase.
　絶縁端子２８は、第２の貫通部４２に挿入された状態で、蓋部３５に固定されている。絶縁端子２８としては、例えば、ガラス端子を用いることが可能である。 The insulating terminal 28 is fixed to the lid 35 in a state of being inserted into the second through portion 42. For example, a glass terminal can be used as the insulating terminal 28.
　導電端子ピン２９は、絶縁端子２８を貫通するように配置されている。導電端子ピン２９は、絶縁端子２８の上下方向に突出している。導電端子ピン２９の上端部は、電源（図示せず）と接続されている。 The conductive terminal pin 29 is disposed to penetrate the insulating terminal 28. The conductive terminal pin 29 protrudes in the vertical direction of the insulating terminal 28. The upper end of the conductive terminal pin 29 is connected to a power supply (not shown).
　電源ケーブル３１は、一端が導電端子ピン２９の下端部と接続されており、他端がステータ５６と接続されている。電源ケーブル３１は、ステータ５６に電源を供給するためのケーブルである。 One end of the power supply cable 31 is connected to the lower end of the conductive terminal pin 29, and the other end is connected to the stator 56. The power cable 31 is a cable for supplying power to the stator 56.
　アキュムレータ１２は、板状のブラケット１５を介して、溶接やボルト等の固定手段によって筒状部３３に固定されている。アキュムレータ１２は、上端に冷媒を吸入する吸入口１２Ａを有する。アキュムレータ１２は、吸入口１２Ａから冷媒を取り込み、該冷媒を気液分離させる。 The accumulator 12 is fixed to the cylindrical portion 33 by a fixing means such as welding or a bolt via a plate-like bracket 15. The accumulator 12 has a suction port 12A at its upper end for sucking the refrigerant. The accumulator 12 takes in the refrigerant from the suction port 12A and separates the refrigerant into gas and liquid.
　上記冷媒としては、例えば、Ｒ３２またはＣＯ２を含む高圧冷媒を用いてもよい。
　このような高圧冷媒を使用した場合でもコストの上昇を抑制した上で、蓋部３５の耐圧強度を確保することができる。 As the refrigerant, for example, a high pressure refrigerant containing R32 or CO 2 may be used.
Even when such a high-pressure refrigerant is used, the pressure resistance of the lid 35 can be secured while suppressing the cost increase.
　吸入管１３は、一端がアキュムレータ１２内の気相に到達しており、他端が圧縮部２２の下部に配置された吸入ポート４５Ｃと接続されている。吸入管１３は、シリンダ４５Ｂの圧縮室Ｒ２にアキュムレータ１２内の気相冷媒を供給する。
　吸入管１４は、一端がアキュムレータ１２内の気相に到達しており、他端が圧縮部２２の上部に配置された吸入ポート４５Ｃと接続されている。吸入管１４は、シリンダ４５Ａの圧縮室Ｒ１にアキュムレータ１２内の気相冷媒を供給する。 One end of the suction pipe 13 reaches the gas phase in the accumulator 12, and the other end is connected to a suction port 45 </ b> C disposed in the lower part of the compression section 22. The suction pipe 13 supplies the gas phase refrigerant in the accumulator 12 to the compression chamber R2 of the cylinder 45B.
One end of the suction pipe 14 reaches the gas phase in the accumulator 12, and the other end is connected to a suction port 45 </ b> C disposed above the compression section 22. The suction pipe 14 supplies the gas phase refrigerant in the accumulator 12 to the compression chamber R1 of the cylinder 45A.
　なお、図１では、一例として、アキュムレータ１２と圧縮部２２との間に、２つの吸入管１３，１４を設けた場合を例に挙げて説明したが、１つの吸入管のみを設けてもよい。 Although FIG. 1 illustrates the case where two suction pipes 13 and 14 are provided between accumulator 12 and compression unit 22 as an example, only one suction pipe may be provided. .
　本実施形態の電動圧縮機１１によれば、蓋部３５の突出量Ｌ、蓋部３５の外径Ｄ、蓋部３５の厚さｔ、蓋部３５における吐出管２７と絶縁端子２８との最小間隔ｈとの間において、０＜Ｌ／Ｄ≦０．２５で、かつ１．４≦ｈ／ｔ≦２．２の関係が満たされるように、突出量Ｌ、外径Ｄ、蓋部３５の厚さｔ、及び最小間隔ｈを設定することで、コストの上昇を抑制した上で、蓋部３５の耐圧強度を確保することができる。 According to the motor-driven compressor 11 of the present embodiment, the protrusion amount L of the lid 35, the outer diameter D of the lid 35, the thickness t of the lid 35, and the minimum of the discharge pipe 27 and the insulating terminal 28 in the lid 35 The protrusion amount L, the outer diameter D, and the lid portion 35 are set such that the relationship of 0 <L / D ≦ 0.25 and 1.4 ≦ h / t ≦ 2.2 is satisfied with the interval h. By setting the thickness t and the minimum distance h, it is possible to secure the pressure resistance of the lid 35 while suppressing the increase in cost.
　以上、本発明の好ましい実施形態について詳述したが、本発明はかかる特定の実施形態に限定されるものではなく、特許請求の範囲内に記載された本発明の要旨の範囲内において、種々の変形・変更が可能である。
　なお、ハウジング２１は、少なくとも一方が開放端とされていればよい。 While the preferred embodiments of the present invention have been described above in detail, the present invention is not limited to such specific embodiments, and various modifications may be made within the scope of the present invention as set forth in the appended claims. Modifications and changes are possible.
Note that at least one of the housings 21 may be an open end.
　本発明は、電動圧縮機に適用可能である。 The present invention is applicable to a motor-driven compressor.
　１０　　圧縮機システム
　１１　　電動圧縮機
　１２　　アキュムレータ
　１２Ａ　　吸入口
　１３，１４　　吸入管
　１５　　ブラケット
　２１　　ハウジング
　２１ａ　　一端面
　２２　　圧縮部
　２４　　シャフト
　２４Ａ，２４Ｂ　　偏心軸部
　２５　　電動部
　２７　　吐出管
　２８　　絶縁端子
　２９　　導電端子ピン
　３１　　電源ケーブル
　３３　　筒状部
　３４　　底部
　３５　　蓋部
　３５ａ，３８ａ　　外面
　３５ｂ，３８ｂ　　内面
　３８　　蓋部本体
　３９　　面取り部
　４０　　ろう材
　４１　　第１の貫通部
　４２　　第２の貫通部
　４５Ａ，４５Ｂ　　シリンダ
　４５Ｃ　　吸入ポート
　４５Ｓ　　シリンダ内壁面
　４７Ａ，４７Ｂ　　ピストンロータ
　４９　　セパレータ
　５２Ａ，５２Ｂ　　軸受
　５５　　ロータ
　５６　　ステータ
　Ａ　　内部空間
　Ｂ　　領域
　Ｏ１　　軸線
　Ｘ　　軸線方向
　Ｌ　　突出量
　Ｄ　　外径
　ｔ　　厚さ
　ｈ　　最小間隔
　Ｒ　　空間
　Ｒ１，Ｒ２　　圧縮室 DESCRIPTION OF SYMBOLS 10 Compressor system 11 Electric compressor 12 Accumulator 12A Suction port 13, 14 Suction pipe 15 Bracket 21 Housing 21a One end face 22 Compression part 24 Shaft 24A, 24B Eccentric shaft part 25 Electric part 27 Discharge pipe 28 Insulated terminal 29 Conductive terminal pin 31 Power cable 33 Cylindrical part 34 Bottom part 35 Lid part 35a, 38a Outer surface 35b, 38b Inner surface 38 Lid body 39 Chamfered part 40 Brazing material 41 1st penetration part 42 2nd penetration part 45A, 45B cylinder 45C Intake port 45S cylinder Inner wall surface 47A, 47B Piston rotor 49 Separator 52A, 52B Bearing 55 Rotor 56 Stator A Internal space B area O 1 axis line X axis direction L projection amount D outer diameter t thickness h minimum distance R space R1, R2 compression chamber

Claims (5)

  1. 　少なくとも一方が開放端とされた筒状部、並びに吐出管が配置される第１の貫通部、及び絶縁端子が配置される第２の貫通部が形成され、前記筒状部の一端と接続されるとともに、該筒状部から該筒状部の延在方向に突出する蓋部を含み、内部空間を区画するハウジングと、
    　前記ハウジング内に設けられ、冷媒を圧縮して、圧縮冷媒を生成するとともに、該圧縮冷媒を前記吐出管が配置された前記内部空間に吐出する圧縮部と、
    　前記ハウジング内に設けられ、前記圧縮部を電動駆動させる電動部と、
    　を備え、
    　前記筒状部からの前記蓋部の突出量をＬ、該蓋部の外径をＤ、前記蓋部の厚さをｔとし、前記蓋部における前記吐出管と前記絶縁端子との最小間隔をｈとした場合、０＜Ｌ／Ｄ≦０．２５で、かつ１．４≦ｈ／ｔ≦２．２である電動圧縮機。     A tubular portion having at least one open end, a first penetrating portion in which the discharge pipe is disposed, and a second penetrating portion in which the insulating terminal is disposed are formed, and are connected to one end of the tubular portion. A housing including a lid projecting from the cylindrical portion in the extending direction of the cylindrical portion, and defining an internal space;
    A compression unit provided in the housing for compressing the refrigerant to generate a compressed refrigerant and discharging the compressed refrigerant into the internal space in which the discharge pipe is disposed;
    An electric unit provided in the housing for electrically driving the compression unit;
    Equipped with
    The amount of projection of the lid from the cylindrical portion is L, the outer diameter of the lid is D, the thickness of the lid is t, and the minimum distance between the discharge pipe and the insulating terminal in the lid is When it is set as h, it is 0 <L / D <= 0.25 and an electric compressor which is 1.4 <= h / t <= 2.2.
  2. 　前記吐出管は、前記ハウジングの軸線が通過する位置に配置させる請求項１記載の電動圧縮機。 The electric compressor according to claim 1, wherein the discharge pipe is disposed at a position through which an axis of the housing passes.
  3. 　前記吐出管は、前記蓋部の外面に配置されたろう材により、前記蓋部にろう付けされており、
    　前記第１の貫通部を区画する前記蓋部の外面側に面取り部を形成するとともに、該面取り部に前記ろう材を配置させる請求項１または２記載の電動圧縮機。     The discharge pipe is brazed to the lid by a brazing material disposed on the outer surface of the lid,
    The electric compressor according to claim 1, wherein a chamfered portion is formed on an outer surface side of the lid portion that divides the first through portion, and the brazing material is disposed in the chamfered portion.
  4. 　前記ハウジングの材料は、引張強度が４００Ｎ／ｍｍ２以上である請求項１から３のうち、いずれか一項記載の電動圧縮機。 Material of the housing has a tensile strength of claims 1 to 3 is 400 N / mm 2 or more, the electric compressor according to any one claim.
  5. 　前記冷媒は、Ｒ３２またはＣＯ２を含む高圧冷媒である請求項１から４のうち、いずれか一項記載の電動圧縮機。 The refrigerant of claim 1 is a high-pressure refrigerant containing R32 or CO 2 4, the electric compressor according to any one claim.
PCT/JP2018/041175 2017-12-08 2018-11-06 Electric compressor WO2019111620A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61157184A (en) * 1984-12-28 1986-07-16 Canon Inc Image pickup device
JP2008038765A (en) * 2006-08-07 2008-02-21 Daikin Ind Ltd Pipe installing method of compressor and compressor
JP2008038862A (en) * 2006-08-10 2008-02-21 Daikin Ind Ltd Compressor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61157184A (en) * 1984-12-28 1986-07-16 Canon Inc Image pickup device
JP2008038765A (en) * 2006-08-07 2008-02-21 Daikin Ind Ltd Pipe installing method of compressor and compressor
JP2008038862A (en) * 2006-08-10 2008-02-21 Daikin Ind Ltd Compressor

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