Detailed description of the invention
With reference to suitable drawing, embodiments of the present invention are described in detail.It addition, to respectively
Part common in figure uses identical reference, and the repetitive description thereof will be omitted.
(embodiment 1)
With reference to Fig. 1~Fig. 6 to the overall structure of the compressor 1 in present embodiment, action,
Functions etc. illustrate.
Fig. 1 is the sketch of the air conditioner of cooling and warming dual-purpose.The use in refrigeration system of present embodiment is joined
Pipe is compressor 1, outdoor heat converter 34, expansion member 35, indoor heat converter 36 even
Connect, make cold-producing medium be circulated.
In the case of refrigerating operaton, the gas refrigerant of the High Temperature High Pressure compressed by compressor 1
Outdoor heat converter 34 is flowed to via cross valve 33.The gas refrigerant of High Temperature High Pressure is played
The outdoor heat converter 34 of condenser effect cools down, and becomes the liquid refrigerant of high pressure.High pressure
Liquid refrigerant expands in expansion member 35, becomes the liquid of the low-temp low-pressure containing slightly gas
Cryogen, flows to indoor heat converter 36.The liquid refrigerant of low-temp low-pressure is played evaporation
The indoor heat converter 36 of device effect heats, and becomes the gas refrigerant of low temperature, again via four
Logical valve 33 returns compressor 1.In the case of heating operation, change system by cross valve 33
The flowing of cryogen, cold-producing medium is towards the direction flowing contrary with refrigerating operaton.
Fig. 2 is the longitudinal section of compressor.(such as, compressor 1 is used as refrigerating air-conditioning
Air conditioner, cold closet, household freezer, refrigerating sales counter etc.), heat-pump-type hot-water supply
Etc. the constitution equipment of freeze cycle, it is mainly provided with hermetic container, compression element as element
2 and motor 7.The compressor 1 of present embodiment is sealed electrical compressor.
The hermetic container of compressor 1 by cylindric cylinder portion 1a, be welded on the upper and lower of a portion 1a
Cap 1b and bottom 1c constitute, inside is confined space.Compression element received by compressor 1
2 and motor 7, in the oil sump 9 of bottom, accumulate the profit being made up of ethers or esters refrigerator oil
Lubricating oil 8.The pasta of lubricating oil 8 is positioned at the top of supplementary bearing 15.
The suction tube 11 of the cap 1b of through hermetic container it is provided with in compressor 1, and through
The discharge pipe 22 of the cylinder portion 1a of hermetic container.Discharge pipe 22 is positioned at the underface of framework 5, court
Center position in the hermetic container of compressor 1 is protrusively provided.The front end of discharge pipe 22 is from end
The outer peripheral face of end winding 17 is projected into central side opening.
Gas refrigerant is compressed and discharges in hermetic container by compression element 2, is arranged on
Top in hermetic container.Compression element 2 as main composition key element be provided with fixed scroll 3,
Non-orbiting scroll 4, framework 5 and Euclidean circle (Japanese: オ Le ダ system リ Application グ) 10.
Fixed scroll 3 erects the scroll (Japanese: ラ ッ プ) of scroll on end plate and constitutes,
It is fixed by bolts on framework 5.Circumference at fixed scroll 3 arranges suction inlet 12, in
Centre portion is provided with outlet 14.Suction inlet 12 connects with suction tube 11, and outlet 14 is with airtight
The space connection of the top of the compression element 2 in container.
Non-orbiting scroll 4 erects the scroll of scroll on end plate and constitutes, and non-orbiting scroll 4 is clipped in
Between fixed scroll 3 and framework 5.Non-orbiting scroll 4 engages formation discharge chambe with fixed scroll 3.
Being provided with group with fixed scroll opposition side and enter the boss portion of bearing of spiraling at non-orbiting scroll 4.At dish
Spin axis holds the cam pin portion 6a being fitted together to for non-orbiting scroll 4 carries out eccentric drive.
Euclidean circle 10 constitutes the rotation limiting member of non-orbiting scroll 4, is arranged on non-orbiting scroll 4
And between framework 5, prevent non-orbiting scroll 4 from certainly then making it move along circuit orbit.
Framework 5 is weldingly fixed on hermetic container, to fixed scroll 3, Euclidean circle 10 and spiral
Scrollwork 4 is supported.Central authorities at framework 5 are provided with cylinder portion prominent downward.In this portion
Inside it is provided with countershaft 6 and carries out the base bearing 5a that axle props up.
At fixed scroll 3 and the peripheral part of framework 5, it is formed the top of fixed scroll 3 empty
Between multiple discharge gas passages of connecting with the underlying space of framework 5.
Motor 7 is provided with rotor 7a, stator 7b, axle 6 and counterweight as main composition key element
16。
Stator 7b is provided with as main composition key element: has and flows through electric current and produce rotating magnetic field
The winding 24 of multiple conductors, transmit the iron core 23 of rotating magnetic field well for efficiency, and be used for
Insulator 26 to the synthetic resin insulated between winding 24 and iron core 23.Stator 7b
Winding 24 by concentrate winding method be wound.
Iron core 23 is fixed on hermetic container by shrink fit.Periphery at this stator 7b
Form multiple breach along complete cycle, between this breach and hermetic container, be formed with discharge gas passage.
Rotor 7a is provided with rotor core 25 as main composition key element and interior is contained in rotor core 25
In permanent magnet, the rotating magnetic field from stator 7b is transformed into during gyration with axle 6 is
The heart rotates.Rotor 7a is arranged in the central authorities of the iron core 23 of stator 7b in revolvable mode
Kong Zhong.
Axle 6 is chimeric with the medium pore of rotor 7a and forms one with rotor 7a.The side of axle 6
Highlight from rotor 7a and engage with compression element 2, being executed by the compressed action of compression element 2
Add eccentric force.In the present embodiment, axle 6 both sides prominent from the both sides of rotor 7a, turn
The both sides of sub-7a are propped up by base bearing 5a and supplementary bearing 15 axle, can stably rotate.Secondary
Bearing 15 is fixed by welding in the support member supports on the hermetic container of compressor 1, and,
It is immersed in lubricating oil 8.
The lower end of axle 6 extends in the oil sump 9 of the bottom of the hermetic container of compressor 1.At axle
6 are provided with lubricating oil 8 are carried out the through hole 6b that supplies towards each bearing portion and each sliding surface, under
The oil sump 9 of end is by through hole 6b suck lubrication oil 8.From oil sump 9 by axle through hole 6b
The lubricating oil 8 being drawn onto in compression element 2 is fed into each bearing and the sliding part of compression element 2.
It is fed into the lubricating oil 8 of sliding part of compression element 2 together with refrigerant gas from fixing whirlpool
The outlet 14 of the central part of volume 3 is discharged.
Counterweight 16 (hereinafter referred to as " is above joined by the counterweight of compression element 2 side being arranged on rotor 7a
Weight ".) 16a and be arranged on rotor 7a compression element 2 opposition side lower counterweight (hereinafter referred to as
Make " lower counterweight ".) 16b composition, it is fixed on rotor 7a by multiple rivets.
Stage motor 7 be energized rotor 7a rotate time, axle 6 also rotates with, and carries out cam pin portion
The gyration that 6a is eccentric, thus, carries out non-orbiting scroll 4 rotating driving, is formed at solid
Determine the discharge chambe between scrollwork 3 and non-orbiting scroll 4 while moving towards central part while becoming from outer circumferential side
Little.Thus, from the outside of the hermetic container of compressor 1 via suction tube 11 and suction inlet 12
The refrigerant gas being inhaled into is compressed by compression element 2, and the refrigerant gas that have compressed is from fixing
The top that the outlet 14 of the central part of scrollwork 3 is discharged in the hermetic container of compressor 1 is empty
Between.
Stator 7b have stator core 23, respectively with the axial both ends of the surface phase of stator core 23
To configuration insulator 26, with together be wound on the winding on stator core 23 and insulator 26
24。
Fig. 3 is the axonometric chart of stator core.As it is shown on figure 3, stator core 23 is many by stacking
Individual steel plate is constituted, and has stator core annulus 27, and in stator core annulus 27
Face radially inner side T-shaped portion 28 that is prominent and that circumferentially arrange week by equal intervals.
Motor 7 is so-called 4 pole 6 slotted, uses not across multiple T-shaped portions 28
It it is the so-called concentration winding method intensively winding winding 24 around 1 T-shaped portion 28.
Fig. 4 is the upward view of insulator, and Fig. 5 is the axonometric chart of insulator.Insulator 26 clamps
Between stator core 23 and winding 24, stator core 23 is insulated with winding 24.Absolutely
Edge 26, such as by liquid crystal polymer (LCP), polybutene p-phthalic acid (PBT), poly-
The resin material that the thermostabilitys such as phenylene sulfide (PPS), polyimides, polyester are good is constituted.And
And, insulator 26, such as, it is made up of the material adding glass fibre to improve intensity.
It addition, the dielectric constant of liquid crystal polymer (LCP) be 3.6, polybutene p-phthalic acid
(PBT) dielectric constant is 3.1~3.3, the dielectric constant of polyhenylene thioether (PPS) is 2.8.
As shown in Figures 4 and 5, insulator 26 has insulator annulus 29, and from insulation
The inner peripheral surface of sub-annulus 29 is prominent and circumferentially multiple by arrange at equal intervals towards radially inner side
Body 30.
The insulator annulus 29 of insulator 26 is configured to and the stator core of stator core 23
The both ends of the surface of annulus 27 connect, and multiple bodies 30 of insulator 26 are configured to and stator ferrum
The both ends of the surface in multiple T-shaped portions 28 of core 23 connect.In other words, stator core 23 is by 2
Insulator 26 is clamped from bearing direction.
The face that insulator annulus 29 connects with stator core 23, the both ends of the surface of its circumference are not entered
Row chamfering.With the face of stator core 23 opposition side, the two ends of its circumference carry out chamfering.
The electromagnetic force that compressor 1 is occurred in stator 7b by streaming current in winding 24,
Rotor 7a is driven to rotate together with axle 6.And, in the electric current flowed in winding 24
Part point electric current leaks towards stator core 23.
Here, in compressor 1, stator is directly anchored on the hermetic container of steel plate, institute
With, the value that must specify in electrical appliance administrative law to human body not impacted (
Between the surface of charging part and equipment body, the leakage current of flowing is less than or equal to 1mA) within.Therefore,
Must take some countermeasures in the electric current making to flow in winding 24, towards stator core 23 leakage
Leakage current is less than or equal to 1mA.
Leakage current identical away from the principle with electric capacity, if leakage current be i, frequency be f,
Stray static electric capacity is C, voltage is V, then the relation of formula (1) is set up.
(mathematical expression 1)
I=2 π fCV ... (1)
Stray static electric capacity C between winding 24 and stator core 23 is, if winding 24 is with fixed
Dielectric constant between sub-iron core 23 is ε, area between winding 24 and stator core 23 is S,
Distance between winding 24 and stator core 23 is d, then the relation of formula (2) is set up.
(mathematical expression 2)
C=ε S/d ... (2)
(dielectric constant of R32)
But, compared with R410A, the conduct time cold-producing medium from generation to generation that greenhouse effects of the earth coefficient is low
Substitute carry out the R32 that studies, its DIELECTRIC CONSTANT ε is high.Such as, the R410A at 40 DEG C
DIELECTRIC CONSTANT ε be 7.7045, to this, the DIELECTRIC CONSTANT ε of the R32 at 40 DEG C is 11.268.
It is to say, in the case of R32 is used as cold-producing medium, based on formula (2) spuious
Electrostatic capacitance C becomes big.Then, leakage current i based on formula (1) may exceed electrically use
The value of regulation in QC logos.
By clipping insulant 32 between winding 24 and stator core 23, such that it is able to reduce
Leakage current i.But, in the case of R32 is used as cold-producing medium, commonly use now
Insulant 32 cannot ensure that leakage current i is less than or equal to regulation in electrical appliance administrative law
Value.The thickness of the insulant 32 commonly used now is 3mm to the maximum, and when thickness compares 3mm
Thickness, or when overlapping for insulant 32 2 are used, cost uprises, and assembleability is deteriorated.
Fig. 6 is T-shaped portion and the sectional view in the circumference of the body of insulator of stator core.Around
Group 24 is wound on the T-shaped portion 28 of stator core 23 and the body of insulator 26 by coil winder
On 30.
In the past, winding 24 was closely connected with the T-shaped portion 28 of stator core 23.On the other hand, exist
In present embodiment, as shown in Figure 6, the width ratio of the circumference of the body 30 of insulator 26 is made
The width of the circumference in the T-shaped portion 28 of stator core 23 is big.By at such stator core 23
And on insulator 26, wind winding 24, winding 24 can be made not contact with stator core 23,
Gap 31 can be set between stator core 23 and winding 24.
According to present embodiment, gap 31 guarantee the distance between winding 24 and stator core 23
D, it is thus possible to reduce stray static electric capacity C based on formula (2), and makes based on formula (1)
Leakage current i less than or equal to the value of regulation in electrical appliance administrative law.
It addition, the body 30 of the T-shaped portion 28 of stator core 23 and insulator 26 is from stator ferrum
Axial (the gyroaxis direction of axle 6) of core 23 is seen, is roughly the same beyond the width of circumference
Shape.But, in order to prevent the deterioration of winding 24, make in the body 30 of insulator 26 from
The T-shaped portion 28 of stator core 23 is ellipse towards the part that circumference is stretched out.
And, gap 31 is accumulated R32 and refrigerator oil.By dielectric constant is compared R32
And the low insulant 32 of refrigerator oil is arranged in the part in gap 31, gap can be reduced
The meansigma methods of the DIELECTRIC CONSTANT ε in 31, can reduce leakage current i further.
And, except making the width of the circumference of the body 30 of insulator 26 more than stator core 23
T-shaped portion 28 circumference width outside, it is also possible between winding 24 and stator core 23
Configuration insulant 32.
And, except making the width of the circumference of the body 30 of insulator 26 more than stator core 23
T-shaped portion 28 circumference width outside, it is also possible to make the inner peripheral surface of insulator annulus 29
Highlight towards inner side radially further than the inner peripheral surface of stator core annulus 27.
As described above, according to present embodiment, strengthen winding 24 and stator core
Distance between 23, can obtain the effect reducing stray static electric capacity C, reducing leakage current.
(embodiment 2)
The description thereof will be omitted for the element identical with the 1st embodiment for present embodiment.Figure
7 is the explanatory diagram of the return portion at the two ends of insulant.Fig. 8 be stator core T-shaped portion with
Sectional view in the circumference of the body of insulator.
As it is shown in fig. 7, the insulant 32 of present embodiment, there is the two ends folding in bearing direction
Return portion 32a returned.It is to say, the two ends in the bearing direction at stator core 23, absolutely
Edge material 32 is when turning back and be arranged in the radial direction of stator core 23 and winding 24 when overlap
Between.
The insulant 32 of present embodiment is 1, but owing to winding 24 is by insulant
Return portion 32a of 32 supports, therefore, even if winding 24 can also be made near central authorities with fixed
2 times of the thickness that distance d is insulant 32 between sub-iron core 23.
According to present embodiment, as shown in Figure 8, except between winding 24 and stator core 23
Outside configuration insulant 32, it is also possible between arranging between stator core 23 and insulant 32
Gap 31.Therefore, winding 24 and stator core 23 is guaranteed by insulant 32 is turned back
Between distance d, such that it is able to reduce stray static electric capacity c based on formula (2), reduce based on
The leakage current i of formula (1).
It addition, in the present embodiment, as shown in Figure 8, although making turning back of insulant 32
Portion 32a is positioned at than winding 24 more by stator core 23 side, but can also make insulant 32
Return portion 32a be positioned at winding 24 side.
But, in the case of return portion 32a making insulant 32 is positioned at winding 24 side,
Near central authorities, gap 31 is positioned between winding 24 and insulant 32.Due in this gap
Cold-producing medium can be accumulated in 31, so easily from winding 24 towards cold-producing medium leakage current.
On the other hand, it is positioned at stator core 23 side in return portion 32a making insulant 32
In the case of, as shown in Figure 8, gap 31 is positioned between secured core 23 and insulant 32.That is,
Gap 31 connects with winding 24 via insulant 32, so, can reduce from winding 24
Current leakage towards the cold-producing medium being accumulated in gap 31.
And, at the two ends in the bearing direction of stator core 23, by thickening stator core 23
Circumference thickness may insure that distance d between winding 24 and stator core 23.
As described above, according to the compressor of the present invention, winding 24 can be strengthened with fixed
Distance between sub-iron core 23, obtains the effect reducing stray static electric capacity C, reducing leakage current.
The invention is not restricted to above-described embodiment, comprise various modified example.Such as, above-described embodiment
It is for easy to understand the embodiment present invention being described and being described in detail, without possessing
Illustrated whole elements.Furthermore, it is possible to one of the element of certain embodiment
The element with another embodiment is divided to replace, furthermore, it is possible to the structure of certain embodiment
Key element is become to be added in the element of further embodiment.Furthermore, it is also possible to each embodiment
A part for element adds, eliminates, replaces other element.
Such as, as compression element 2, in addition to spiral-wound, it is also possible to employing rotator type,
Swing type or compression element in the form of piston.
And, although to using the situation of R32 to be illustrated as cold-producing medium, but do not limit
In this.Such as, as cold-producing medium, it would however also be possible to employ containing the R32 having more than 50 weight %
Mix refrigerant, or need to take other cold-producing medium of leakage current countermeasure.
Description of reference numerals
1 hermetic container
7 motor
7a rotor
7b stator
8 lubricating oil
9 oil sumps
23 stator cores
25 rotor cores
24 windings
26 insulators
27 stator core annulus
28T shape portion
29 insulator annulus
30 bodies
31 gaps
32 insulant
32a return portion
33 cross valves
34 outdoor heat converters
35 expansion member
36 indoor heat converters