CN104518598A - Airtight motor compressor and air conditioning equipment - Google Patents
Airtight motor compressor and air conditioning equipment Download PDFInfo
- Publication number
- CN104518598A CN104518598A CN201410050592.8A CN201410050592A CN104518598A CN 104518598 A CN104518598 A CN 104518598A CN 201410050592 A CN201410050592 A CN 201410050592A CN 104518598 A CN104518598 A CN 104518598A
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- insulating thin
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- insulating
- sealed electrical
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- 238000004378 air conditioning Methods 0.000 title abstract description 3
- 239000012212 insulator Substances 0.000 claims description 30
- 238000007906 compression Methods 0.000 claims description 26
- 230000006835 compression Effects 0.000 claims description 25
- 239000003507 refrigerant Substances 0.000 claims description 21
- 230000011514 reflex Effects 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 230000008021 deposition Effects 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000007667 floating Methods 0.000 abstract description 12
- 238000010030 laminating Methods 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 239000010687 lubricating oil Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- FXRLMCRCYDHQFW-UHFFFAOYSA-N 2,3,3,3-tetrafluoropropene Chemical compound FC(=C)C(F)(F)F FXRLMCRCYDHQFW-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention relates to an airtight motor compressor and air conditioning equipment, and the task is to reduce leakage current caused by floating electrostatic capacity between a coil and a stator core. The airtight motor compressor has, in an airtight container, a compressing mechanism part and a motor which drives the compressingmechanism part through a rotating shaft. In addition, a stator (7b) of the abovementioned motor has a stator core (23), a coil wound on the stator core and an insulating component (32) arranged between the abovementioned stator core and the abovementioned coil. The insulating component is formed by laminating multiple insulating sheets (32a, 32b), the insulating sheet (32a) of the abovementioned multiple insulating sheets at one side forms folded-back parts (32aa) at two axial end parts of the insulating sheet, and axial end parts of the insulating sheet (32b) of the abovementioned multiple insulating sheets at the side are inserted in the folded-back parts.
Description
Technical field
The present invention relates to sealed electrical compressor and aircondition, particularly relate to the sealed electrical compressor of the constitution equipment of the freeze cycle being suitable as refrigerating air-conditioning (such as aircondition, refrigerator, refrigerator-freezer, freezer show window etc.), heat pump type hot water supply apparatus etc.
Background technology
For the motor of compressor, possess rotor and be configured in the stator of radial outside of rotor, the insulator that this stator has stator core, configures opposite to each other with the axial both ends of the surface of this stator core respectively, and the coil be all wrapped on said stator iron core and insulator.And, insulated by insulating component between coil and stator core.
At present, the greenhouse effect coefficient of the widely used R410A of the cold-producing medium as air conditioner is 2088, wishes the cold-producing medium that environment for use load is less.As its candidate, just discussing use greenhouse effect coefficients be 675(namely, about 1/3rd of R410A) R32 as cold-producing medium.
But the relative dielectric constant of R32 is than the height of R410A.Therefore, when have employed R32 as cold-producing medium, insulate even if arrange insulating component between coil and stator core, the floating static capacity between coil and stator core also becomes large, can not reduce leakage current fully.
As the prior art reducing leakage current, have at patent documentation 1(Japanese Unexamined Patent Publication 8-107642 publication) the middle technology recorded.In the technology of this patent documentation 1, by making insulating paper side on the contact-making surface of stator core and insulating paper or stator core side has multiple concavo-convex structure, the contact area of insulating paper and stator being reduced, leakage current is reduced.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 8-107642 publication
Summary of the invention
Invent problem to be solved
But even if insulating paper or stator core are made the irregular structure of tool, also accumulate cold-producing medium in the gap of insulating paper and stator core, therefore, electric current leaks from insulating paper side direction stator core side through cold-producing medium.Therefore, even if there is the contact area reducing insulating paper and stator core, the problem that leakage current reduces can not be made.
Because the dielectric constant of cold-producing medium is generally high than insulating paper, so in the technology of above-mentioned patent documentation 1, the floating static capacity between coil and stator core on the contrary increases.Therefore, in the stator of motor being recorded in patent documentation 1, the leakage current caused by floating static capacity can not be reduced, particularly when employing the cold-producing mediums such as the high R32 of relative dielectric constant, reducing the leakage current caused by the floating static capacity between coil and stator core and becoming difficulty.
The object of the invention is to obtain sealed electrical compressor and the aircondition that can reduce the leakage current caused by the floating static capacity between coil and stator core.
For solving the technological means of problem
In order to achieve the above object, a technical scheme of the present invention in closed container, possesses compression mechanical part and through the sealed electrical compressor of rotating shaft to the motor that this compressor means portion drives; It is characterized in that: the stator of above-mentioned motor, there is stator core, the coil be wrapped in this stator core, and be disposed in the insulating component between the unshakable in one's determination and above-mentioned coil of said stator; This insulating component is consisted of stacked multi-disc insulating thin; The insulating thin of a part in above-mentioned multi-disc insulating thin axially forms reflex part in both ends, inserts the axial end portion of the other insulating thin in above-mentioned multi-disc insulating thin in this reflex part.
Another technical scheme of the present invention in closed container, possesses compression mechanical part and through the sealed electrical compressor of rotating shaft to the motor that this compressor means portion drives; It is characterized in that: the stator of above-mentioned motor, there is stator core, the coil be wrapped in this stator core, and be disposed in the insulating component between the unshakable in one's determination and above-mentioned coil of said stator; This insulating component is consisted of the resinous insulating thin of stacked multi-disc; Above-mentioned multi-disc insulating thin axially both ends respective at least partially or the arbitrary position reciprocally deposition of above-mentioned insulating thin.
Another technical scheme more of the present invention is sealed electrical compressor, condenser, expansion valve and evaporator are in turn connected into ring-type and form the aircondition of refrigerant loop; It is characterized in that: the cold-producing medium flowing through above-mentioned refrigerant loop is any one of mix refrigerant of the unitary system cryogen of R32 or the R32 containing more than 50 % by weight, and above-mentioned sealed electrical compressor uses any one sealed electrical compressor above-mentioned.
The effect of invention
According to the present invention, there is the sealed electrical compressor of leakage current and the effect of aircondition that can obtain and can reduce and be caused by the floating static capacity between coil and stator core.
Accompanying drawing explanation
Fig. 1 is the longitudinal section of the embodiment 1 representing sealed electrical compressor of the present invention.
Fig. 2 is the stereogram of the stator core representing motor shown in Fig. 1.
Fig. 3 is the upward view of the insulator representing motor shown in Fig. 1.
Fig. 4 is the stereogram of the insulator watching motor shown in Fig. 1 from top.
Fig. 5 is the cutaway view near the teeth portion of stator core in motor shown in Fig. 1, is that the V-V alignment represented in Fig. 1 looks cutaway view.
Fig. 6 is the expanded view of insulating component shown in Fig. 5.
Fig. 7 is the figure of the embodiment 2 that sealed electrical compressor of the present invention is described, be the stator core in motor teeth portion near cutaway view, be the figure suitable with Fig. 5.
Embodiment
Below, with reference to the accompanying drawings specific embodiment of the present invention is described.In addition, the part having marked same Reference numeral in the various figures represents same or suitable part.
[embodiment 1]
Use Fig. 1 ~ Fig. 6 that embodiments of the invention 1 are described.Fig. 1 is the longitudinal section of the sealed electrical compressor representing the present embodiment 1, and the sealed electrical compressor of the present embodiment is located at the compressor on the refrigerant loop forming aircondition.Namely, aircondition is sealed electrical compressor, condenser, expansion valve and evaporator are in turn connected into ring-type and form the aircondition of refrigerant loop, in the present embodiment, the cold-producing medium flowing through above-mentioned refrigerant loop uses any one of mix refrigerant of the unitary system cryogen of R32 or the R32 containing more than 50 % by weight, and, use the sealed electrical compressor of the present embodiment 1 of following explanation, as the sealed electrical compressor forming above-mentioned refrigerant loop.
[entirety of sealed electrical compressor is formed]
According to Fig. 1, the entirety formation of the sealed electrical compressor of the present embodiment 1 is described.The sealed electrical compressor 50 of the present embodiment is used as the constitution equipment of aircondition, using closed container 1, compression mechanical part 2 and motor 7 as main composition part.
Above-mentioned closed container 1, by the cylinder portion 1a of cylindrical shape with consist of the upper and lower cap 1b and bottom 1c etc. of welded and installed at this 1a, its inside becomes confined space.In addition, in closed container 1, receive compression mechanism portion 2 and above-mentioned motor 7, form oil groove 9 in the bottom of this closed container 1.In this oil groove 9, store the lubricating oil 8 be made up of the refrigerator wet goods of ether system or ester system.The pasta of this lubricating oil 8, the mode that the top of the supplementary bearing 15 supported is carried out in the bottom of transmitting the rotating shaft 6 of the actuating force of above-mentioned motor 7 to be positioned at subtend compression mechanism portion 2 is set.
Reference numeral 11 is suction pipes that the cap 1b of through above-mentioned closed container 1 installs, and Reference numeral 22 is discharge pipes that the cylinder portion 1a of through above-mentioned closed container 1 installs.This discharge pipe 22 is configured in the position be close to below compression mechanism portion 2, arrange highlightedly to the center position in closed container 1, be configured to, make the front end of this discharge pipe 22 carry out opening with projecting to central side from the outer peripheral face of the end coil 17 above-mentioned motor 7.
Compression mechanism portion 2, is the gas refrigerants such as compression R32 and the compression mechanical part of discharging in closed container 1, is arranged on the top in closed container 1.Compression mechanical part 2, possesses fixed scroll 3, convolution scroll plate 4, framework 5 and cross slip-ring 10 as main composition part.
Above-mentioned fixed scroll 3, end plate erects Vorticose scroll wrap and forms, fastening in said frame 5 with bolt.Suction inlet 12 is set at the circumference of fixed scroll 3, outlet 14 is set at central portion.Above-mentioned suction inlet 12 is communicated with above-mentioned suction pipe 11, and above-mentioned outlet 14 is communicated with the discharge chamber 40 above the compression mechanical part 2 in above-mentioned closed container 1.
Above-mentioned convolution scroll plate 4, end plate erects Vorticose scroll wrap and forms, and this convolution scroll plate 4 configures in the mode be sandwiched between above-mentioned fixed scroll 3 and said frame 5, by making above-mentioned fixed scroll 3 engage with convolution scroll plate 4, form discharge chambe.Hub portion 4b is set in the rear side (anti-fixed scroll side) of above-mentioned convolution scroll plate 4, in hub portion 4b, loads convolution bearing 4a.In order to carry out eccentric drive to convolution scroll plate 4, the cam pin portion 6a of chimeric above-mentioned rotating shaft 6 in above-mentioned convolution bearing 4a.
Above-mentioned cross slip-ring 10, forms the rotation limiting mechanism of above-mentioned convolution scroll plate 4, is arranged between this convolution scroll plate 4 and said frame 5, for preventing the rotation of convolution scroll plate 4, makes it carry out circular orbit motion.
Said frame 5, is fixed by welding on above-mentioned closed container 1, supports above-mentioned fixed scroll 3, cross slip-ring 10 and convolution scroll plate 4.In the central authorities of this framework 5, cylinder portion 5a outstanding is downwards set.In this 5a, the base bearing 5b being used for supporting above-mentioned rotating shaft 6 is set.
At the peripheral part of above-mentioned fixed scroll 3 and framework 5, form the multiple Exhaust Gas paths (not shown) be communicated with the underlying space of framework 5 by the superjacent air space of fixed scroll 3 (discharge chamber 40).
Above-mentioned motor 7, using the rotor 7a formed integratedly on above-mentioned rotating shaft 6 by hot charging etc. and be fixed on above-mentioned closed container 1 inner face by hot charging etc. stator 7b as main composition part, above-mentioned rotor 7a is installed with counterweight 16.Namely, the upper surface of above-mentioned rotor 7a is installed with counterweight (compression mechanical part side counterweight) 16a, lower surface is installed with lower counterweight (anti-compression mechanical part side counterweight) 16b, and these upper and lower counterweight 16a, 16b are fixed on above-mentioned rotor 7a by multiple rivet respectively.
Said stator 7b, with stator core (hereinafter also referred to as iron core) 23, coil 24, and the insulator 26 of resin forming product is main composition part.Stator core 23 is for transmitting rotating magnetic field with good efficiencies.Coil 24, is wound onto on this iron core 23, has and make electric current flow through and produce multiple conductors of rotating magnetic field.The insulator 26 of resin forming product, is located at the axial two ends of above-mentioned unshakable in one's determination 23, for the insulation between above-mentioned coil 24 and unshakable in one's determination 23.Be located at 2 above-mentioned insulators 26 at the axial two ends of above-mentioned unshakable in one's determination 23, configure to clip above-mentioned unshakable in one's determination 23 modes opposite each other.
Above-mentioned coil 24 is wrapped on above-mentioned unshakable in one's determination 23 in concentratred winding mode.In addition, in the periphery of said stator 7b, form axial many otch (not shown) throughout all-round, between this otch and closed container 1, form Exhaust Gas path.
Above-mentioned rotor 7a, is main composition part by rotor core (hereinafter also referred to as iron core) 25 and the interior permanent magnet be contained in this iron core 25, the rotating magnetic field from said stator 7b is transformed into rotary motion, above-mentioned rotating shaft 6 is rotated.This rotor 7a, is configured in the medium pore 23a(of the iron core 23 of said stator 7b revolvably with reference to Fig. 2) in.
Above-mentioned rotating shaft 6, inserts and is entrenched in the medium pore of above-mentioned rotor 7a, rotor 7a integration therewith.In addition, the end side (upper end side) of this rotating shaft 6, extends from rotor 7a to above-mentioned compression mechanical part 2 side, and the cam pin portion 6a being formed at the end of this rotating shaft 6 is formed in the mode engaged with compression mechanism portion 2.Thus, eccentric force is applied by the compressed action in compression mechanism portion 2 at above-mentioned cam pin portion 6a.In addition, another side (lower end side) of above-mentioned rotating shaft 6, extends from above-mentioned rotor 7a to above-mentioned oil groove 9 side of the bottom of closed container 1.And above-mentioned rotating shaft 6 is supported by above-mentioned base bearing 5b and supplementary bearing 15 in the both sides of above-mentioned rotor 7a, can stably form rotatably.In addition, above-mentioned supplementary bearing 15 is supported by the supporting member 41 be fixed by welding on closed container 1, and, be submerged in lubricating oil 8.
On above-mentioned rotating shaft 6, arrange the through hole 6b of the lubricating oil 8 of the bottom be used for each bearing portion, each sliding part supply closed container 1, the lubricating oil 8 of above-mentioned oil groove 9 attracted to side, compression mechanism portion 2 through above-mentioned through hole 6b.The lubricating oil 8 having attracted to this compression mechanical part 2 side holds 4a, base bearing 5b to above-mentioned rotary shaft and supplies, and each sliding part (sliding part of cross slip-ring 10, the sliding part of two scroll plate 3,4) to compression mechanical part 2 supplies.
The lubricating oil 8 Gong giving to the sliding part of compression mechanical part 2 is discharged to above-mentioned discharge chamber 40 with the above-mentioned outlet 14 of refrigerant gas from the central portion being located at fixed scroll 3.
As being energized to above-mentioned motor 7, rotor 7a rotates, then accompany therewith, axle 6 also rotates, by carrying out the rotary motion of cam pin portion 6a bias, above-mentioned convolution scroll plate 4 is carried out convolution and is driven, and the discharge chambe one side be formed between above-mentioned fixed scroll 3 and convolution scroll plate 4 moves one side and diminishes from outer circumferential side to central portion.Thus, the refrigerant gas sucked through above-mentioned suction pipe 11 and suction inlet 12 from the outside of closed container 1 is compressed at compression mechanical part 2, and this is discharged to the discharge chamber 40 of closed container 1 internal upper part from the outlet 14 of fixed scroll 3 central portion by the refrigerant gas that have compressed.
[stator core]
Fig. 2 is the stereogram of the stator core 23 of motor 7 shown in Fig. 1.Shown in Fig. 2 like this, stator core 23 is made up of stacked multiple steel plates, possess outer circumferential side annulus 27 and from then on annulus 27 inner peripheral surface to radially inner side outstanding and in the circumferential direction the teeth portion 28 that is arranged at equal intervals.In addition, Reference numeral 23a is the medium pore of stator core 23, and Reference numeral 33 is grooves.
Above-mentioned motor 7 is so-called 4 pole 6 grooves, to adopt not in multiple above-mentioned teeth portion 28 but around 1 teeth portion 28 intensively winding around 24(with reference to Fig. 1, Fig. 5) so-called concentratred winding mode.
[insulator]
Fig. 3 is the upward view of the insulator 26 representing motor 7 shown in Fig. 1, and Fig. 4 is the stereogram watching this insulator 26 from top.This insulator 26, is clamped between stator core 23 and coil 24, insulate to stator core 23 and coil 24.
Above-mentioned insulator 26, such as, be made up of the resin material that the thermal endurances such as liquid crystal polymer (LCP), polybutylene terephthalate (PBT) (PBT), polyphenylene sulfide (PPS), polyimides, polyester are good.In addition, insulator 26 improves in order to intensity, is preferably made up of the above-mentioned material being mixed into glass fibre.
As shown in Figures 3 and 4, insulator 26 have insulator annulus 29 and from the inner peripheral surface of insulator annulus 29 to radially inner side outstanding and in the circumferential direction multiple main parts 30 of being arranged at equal intervals.
The above-mentioned insulator annulus 29 of insulator 26, configure in the mode that the both ends of the surface of the stator core annulus 27 with said stator iron core 23 contact, the mode that multiple aforementioned body portions 30 of insulator 26 contact with the both ends of the surface of the multiple teeth portion 28 with said stator iron core 23 configures.That is, said stator iron core 23 to be formed from the mode be axially sandwiched between above-mentioned 2 insulators 26.
[explanation of leakage current]
By electric current flow through coil 24 and stator 7b occur electromagnetic force, rotor 7a is rotated together with rotating shaft 6, and thus, sealed electrical compressor is driven.And the electric current flowing through the part in the electric current of above-mentioned coil 24 leaks to stator core 23.
For in the sealed electrical compressor of aircondition etc., because stator 7b is directly fixed on the closed container 1 of steel plate, so, in electrical appliance safety law, define the limit value of leakage current, not have an impact to human body.That is, the leakage current flowed between charging part and the surface of body, is prescribed in the mode becoming below 1mA.Therefore, need to take some countermeasures, so as to flow through in the electric current of coil 24, to stator core 23 leak leakage current be below 1mA.
The principle of leakage current is identical with the principle of capacitor, and as set leakage current as i, cycle is f, and floating static capacity is C, and voltage is V, then the relation of following formula is set up.
i＝2πfCV……（1）
Floating static capacity C between coil 24 and stator core 23, as set relative dielectric constant between coil 24 and stator core 23 as ε, area between coil 24 and stator core 23 is S, and the distance between coil 24 and stator core 23 is d, then the relation of following formula is set up.
C＝εS／d……（2）
[relative dielectric constant of cold-producing medium R32]
Greenhouse effect coefficient is low, as the relative dielectric constant ε of the candidate of follow-on cold-producing medium cold-producing medium R32 in question than the height of cold-producing medium R410A.Such as, the relative dielectric constant ε of the R410A at 40 DEG C is 7.7045, and on the other hand, the relative dielectric constant ε of the R32 at 40 DEG C is 11.268.That is, when have employed R32 as cold-producing medium, according to above-mentioned (2) formula, floating static capacity C becomes large.Therefore, according to above-mentioned (1) formula, there is the danger that leakage current i exceedes the value specified in electrical appliance safety law.
[leakage current countermeasure in the past]
By clipping insulating component between coil 24 and stator core 23, leakage current i can be made to reduce.But, when have employed R32 as cold-producing medium, in now general insulating component, can not ensure that leakage current i is below the value specified by electrical appliance safety law.Although also can consider the thickness increasing insulating component, as made insulating component thickening, then cost uprises, and assembling also worsens.In addition, although also can consider that the thickness of insulation tunicle by increasing coil 24 guarantees insulation distance, the amount that this amount that the occupation efficiency of coil can be made to increase increased by film thickness with the insulation of coil is suitable, assembling also worsens.
[the leakage current countermeasure of the present embodiment]
Fig. 5 is the cutaway view near the teeth portion 28 of stator core 23 in motor shown in Fig. 1, and being that the alignment of V-V shown in Fig. 1 looks cutaway view, is that the figure configuring the state of insulating component 32 in the gap between the teeth portion 28 and coil 24 of stator core 23 is described.In addition, Fig. 6 is the expanded view of insulating component 32 shown in Fig. 5.
As shown in Figure 5, in the present embodiment, coil 24 is wrapped in the teeth portion 28 of stator core 23 across the insulating component 32 be made up of multi-disc insulating thin 32a, 32b.In addition, as the material of above-mentioned insulating component (insulating thin), be preferably such as made up of the resin material that the thermal endurances such as PETG (PET), polyethylene naphtha (PEN) are good.
And, above-mentioned insulating component 32 is as shown in the expanded view of Fig. 6, the axial both ends (upper and lower both ends) of insulating thin 32a in above-mentioned multi-disc insulating thin 32a, 32b, coil 24 side form reflex part 32aa, the other insulating component in above-mentioned multi-disc insulating thin is inserted in the reflex part 32aa that this is upper and lower, the i.e. insulating thin 32b of stator core 23 side, becomes the formation of the insulating thin 32b sandwiching stator core 23 side in the reflex part 32aa that this is upper and lower.
And, as shown in Figure 5, at the two ends (being upper and lower side in Figure 5) of the axis of stator core 23, the insulating thin 32a of coil 24 side of above-mentioned insulating component 32 is folded back, become and sandwich the other insulating thin 32b of stator core 23 side and state that the other insulating thin 32b of stator core 23 side is fixed by the upper and lower reflex part 32aa of above-mentioned insulating thin 32a, this insulating component 32 is configured between said stator unshakable in one's determination 23 and the radial direction of coil 24.That is, insulating component 32 shown in Fig. 6 is in the mode consistent with the shape of the groove 33 between the teeth portion 28 being formed in stator core 23 shown in Fig. 2 by warpage, is inserted in this groove 33.After this insulating component 32 is inserted above-mentioned groove 33, by all winding around 24 on the main part 30 of above-mentioned teeth portion 28 and above-mentioned insulator 26, become state as shown in Figure 5.
In addition, in the present embodiment, the insulating thin 32a of coil 24 side in above-mentioned insulating component 32, increases thickness compared with the insulating thin 32b of stator core 23 side.Because of the difference of thickness for this reason, the formability improvement of the axially lower reflex part 32aa of insulating thin 32a, can easily make insulating thin 32b compared with Bao Yifang along the shape of the insulating thin 32a of a thicker side.Therefore, it is possible to easily carry out insulating component 32 to the insertion in the above-mentioned groove 33 of stator core 23.
Further, because of by above-mentioned insulating thin 32a axially under reflex part 32aa fix other insulating thin material 32b, so, when inserting insulating component 32 in above-mentioned groove 33, above-mentioned insulating thin 32b also can be prevented to axial dipole field.Thus, when also can suppress winding around, coil 24 contacts with the edge part of the end becoming insulating thin 32b and damages coil 24.That is, insulating thin 32a, 32b of insulating component 32 is formed, because be made up of the resin material that PET, PEN etc. are hard as described above, so, there is the danger of the insulation tunicle being damaged coil 24 by its edge part.But, in the present embodiment, owing to being end face and the discontiguous formation of coil of the edge part becoming insulating thin 32a, 2b, so, the damage of the insulation tunicle to coil 24 can be suppressed.
In addition, the present embodiment forms insulating component 32 by multi-disc insulating thin 32a, 32b, at the axial two ends of the insulating thin 32a of coil sides, reflex part 32aa is set, make the formation that reflex part 32aa thus fixes other insulating thin 32b, so, compared with the insulating component 32 be made up of 1 insulating component in the past, the distance d between coil 24 and stator core 23 can be made to increase the amount suitable with the thickness of above-mentioned insulating thin 32b.Therefore, according to above-mentioned (2) formula, floating static capacity C can be reduced, according to above-mentioned (1) formula, the effect that can also reduce leakage current i can be obtained.
And, in the present embodiment, the coil sides insulating thin 32a forming insulating component 32 is folded back at axial two ends, other insulating thin 32b can be sandwiched securely, so, even under can making the such operating condition returning liquid to compressor inside at the cold-producing medium of refrigerant loop, liquid refrigerant is also difficult to enter above-mentioned structure between 2 insulating thins 32a, 32b.Therefore, the cold-producing medium R32 that relative dielectric constant can be suppressed high can also be obtained and flow into the effect causing leakage current to increase between coil 24 and stator core 23.That is, due to relative dielectric constant is configured between coil 24 and stator core 23 than R32 and the low insulating component 32 of refrigerator oil, so, the mean value of relative dielectric constant ε can be reduced, leakage current i can be reduced.
[embodiment 2]
According to Fig. 7, embodiments of the invention 2 are described.Fig. 7 is the cutaway view near the teeth portion of stator core in the motor of the sealed electrical compressor of the present embodiment 2, and being the figure suitable with Fig. 5, is that the figure configuring the state of insulating component 32 in the gap between the teeth portion 28 and coil 24 of stator core 23 is described.In addition, in the explanation of the present embodiment 2, the part different from above-described embodiment 1 is described, due to identical with above-described embodiment 1 about other parts, so their explanation is omitted.
In above-described embodiment 1, describe form as follows example, namely, insulating component 32 is made up of multi-disc insulating thin 32a, 32b, the insulating thin 32a of a side arranges reflex part 32aa down in the axial direction, and other insulating thin material 32b sandwiches and is fixed by reflex part 32aa thus.On the other hand, in the present embodiment 2, it is identical that insulating component 32 forms this point by multi-disc insulating thin (resinous thin plate) 32a, 32b, but the reflex part 32aa that above-described embodiment 1 is such is not set, alternatively form, make the formation of the respective reciprocally deposition at least partially making both ends (upper and lower end parts) 32c of the axis of insulating thin 32a, 32b of multi-disc (being 2 in the present embodiment).
In addition, in the present embodiment, although make whole reciprocally depositions at the both ends of the axis of insulating thin 32a, 32b, whole depositions at the both ends of the axis of insulating thin 32a, 32b can not also be made, but partly deposition.Or, also independently can make two insulating thin 32a, 32b reciprocally deposition at the arbitrary position of insulating thin with the both ends 32c of the axis of insulating thin 32a, 32b.
In addition, above-mentioned insulating thin 32a, 32b are made up of the resin material of the excellent heat resistances such as PETG (PET), polyethylene naphtha (PEN) in the same manner as above-described embodiment 1.
Even if form as in this embodiment, at the groove 33(to stator core 23 with reference to Fig. 2) when inserting insulating component 32, also can prevent multi-disc insulating thin 32a, 32b from axially reciprocally offseting.Therefore, it is possible to prevent arbitrary insulating thin from giving prominence in the axial direction than other insulating thin, when winding around, coil 24 contacts with the edge part of the end becoming above-mentioned outstanding insulating thin and damages this coil 24.
In addition, in the present embodiment, because the distance d between coil 24 and stator core 23 can be made to increase the amount suitable with the thickness of insulating thin 32b, so, leakage current i can be reduced similarly to Example 1.
Further because insulating thin 32a and insulating thin 32b at both ends or arbitrary position by deposition, so multi-disc insulating thin 32a, 32b become the state be mutually snugly fixed.Therefore, even under such operating condition that the cold-producing medium of refrigerant loop returns liquid to compressor inside, liquid refrigerant is also difficult to enter above-mentioned between multi-disc insulating thin 32a, 32b, can flow into and cause leakage current i to increase between coil 24 and stator core 23 suppressing by the cold-producing medium R32 high to relative dielectric constant.Particularly when above-mentioned insulating thin 32a and insulating thin 32b to be constituted by the mode of deposition at their both ends, also there is liquid refrigerant and be difficult to enter effect between insulating thin 32a, 32b.
As described above, according to each embodiment of the sealed electrical compressor of the invention described above, can flow into the high cold-producing medium R32 of relative dielectric constant and cause leakage current i to increase between coil 24 and stator core 23 suppressing.Therefore, in the aircondition employing cold-producing medium R32 as being used in by the sealed electrical compressor of the present embodiment, then can obtain the aircondition of leakage current suppression at such as below 1mA.
That is, according to various embodiments of the present invention, the sealed electrical compressor and aircondition that reduce the leakage current caused by the floating static capacity between coil 24 and stator core 23 can be obtained.
In addition, the invention is not restricted to above-described embodiment, comprise various variation.
Such as, in above-mentioned the present embodiment, although the description of the example that have employed vortex as compression mechanical part 2, but in addition, rotary type, swing type or shuttle compression mechanical part 2 also can be used.In addition, although the description of vertical sealed electrical compressor, but also can similarly apply for horizontal sealed electrical compressor.
And, although be illustrated the situation employing R32 as cold-producing medium, but be not limited thereto, such as, employ as cold-producing medium containing more than 50 % by weight R32 mix refrigerant, need to take leakage current countermeasure other cold-producing medium (such as containing R32 and HFO-1234yf(2,3,3,3-tetrafluoeopropene) cold-producing medium constituent etc.) when, also can similarly apply.
In addition, above-described embodiment is the embodiment explained to be described in the present invention easy understand, is not necessarily limited to the embodiment possessing the whole formation described.Further, a part for the structure of a certain embodiment can be replaced as the structure of other embodiment, in addition, also can increase the structure of other embodiment in the formation of a certain embodiment.
Description of reference numerals:
1: closed container, 1a: cylinder portion, 1b: cap, 1c: bottom,
2: compression mechanical part, 3: fixed scroll,
4: convolution scroll plate, 4a: convolution bearing, 4b: hub portion,
5: framework, 5a: cylinder portion, 5b: base bearing,
6: axle, 6a: cam pin portion, 6b: through hole,
7: motor, 7a: rotor, 7b: stator,
8: lubricating oil, 9: oil groove, 10: cross slip-ring,
11: suction pipe, 12: suction inlet, 14: outlet, 15: supplementary bearing,
16: counterweight, 16a: upper counterweight, 16b: lower counterweight,
17: end coil, 18a, 18b: Exhaust Gas path,
22: discharge pipe, 23: stator core, 23a: medium pore,
24: coil, 25: rotor core, 26: insulator,
27: the annulus, 28 of stator core: teeth portion,
29: the annulus, 30 of insulator: the main part of insulator,
32: insulating component, 32a: the insulating thin of coil sides, 32aa: reflex part,
32b: the insulating thin of stator core side, 32c: the both ends of insulating thin,
33: groove, 40: discharge chamber, 41: supporting member, 50: sealed electrical compressor.
Claims (10)
1. a sealed electrical compressor in closed container, possesses compression mechanical part and through the sealed electrical compressor of rotating shaft to the motor that this compressor means portion drives;
It is characterized in that:
The stator of above-mentioned motor, has stator core, a coil be wrapped in this stator core, and is disposed in the insulating component between the unshakable in one's determination and above-mentioned coil of said stator;
This insulating component is consisted of stacked multi-disc insulating thin;
The insulating thin of a part in above-mentioned multi-disc insulating thin axially forms reflex part in both ends, inserts the axial end portion of the other insulating thin in above-mentioned multi-disc insulating thin in this reflex part.
2. sealed electrical compressor according to claim 1, it is characterized in that: the insulating thin of the coil sides in above-mentioned multi-disc insulating thin axially forms reflex part in both ends, inserts the axial end portion of the insulating thin of the stator core side in above-mentioned multi-disc insulating thin in this reflex part.
3. sealed electrical compressor according to claim 1, is characterized in that: the insulating thin forming above-mentioned insulating component is made up of the resin material of excellent heat resistance.
4. sealed electrical compressor according to claim 3, is characterized in that: the resin material forming above-mentioned insulating thin, is PETG (PET) or polyethylene naphtha (PEN).
5. sealed electrical compressor according to claim 1, is characterized in that: be equipped with insulator at the two ends of the axis of said stator iron core, and said stator iron core and above-mentioned insulator are all wrapped above-mentioned coil.
6. sealed electrical compressor according to claim 5, it is characterized in that: said stator is unshakable in one's determination, possess the annulus of outer circumferential side and teeth portion that from then on annulus is outstanding to radially inner side, above-mentioned insulator possesses insulator annulus and main part that from then on insulator annulus is outstanding to radially inner side, and the teeth portion of said stator iron core and the main part of above-mentioned insulator are all wrapped above-mentioned coil in concentratred winding mode.
7. sealed electrical compressor according to claim 1, is characterized in that: the thickness forming the insulating thin of the Thickness Ratio said stator core side of the insulating thin of the coil sides of above-mentioned insulating component is large.
8. a sealed electrical compressor in closed container, possesses compression mechanical part and through the sealed electrical compressor of rotating shaft to the motor that this compressor means portion drives;
It is characterized in that:
The stator of above-mentioned motor, has stator core, a coil be wrapped in this stator core, and is disposed in the insulating component between the unshakable in one's determination and above-mentioned coil of said stator;
This insulating component is consisted of the resinous insulating thin of stacked multi-disc;
Above-mentioned multi-disc insulating thin axially both ends respective at least partially or the arbitrary position reciprocally deposition of above-mentioned insulating thin.
9. sealed electrical compressor according to claim 8, is characterized in that: the above-mentioned multi-disc insulating thin forming above-mentioned insulating component, whole reciprocally depositions at its axial both ends.
10. an air conditioner is sealed electrical compressor, condenser, expansion valve and evaporator are in turn connected into ring-type and form the aircondition of refrigerant loop;
It is characterized in that:
The cold-producing medium flowing through above-mentioned refrigerant loop be R32 unitary system cryogen and containing more than 50 % by weight R32 mix refrigerant in any one, and,
Above-mentioned sealed electrical compressor uses the sealed electrical compressor described in any one in claim 1 to 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013210980A JP6261271B2 (en) | 2013-10-08 | 2013-10-08 | Hermetic electric compressor and air conditioner |
| JP2013-210980 | 2013-10-08 |
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| CN104518598A true CN104518598A (en) | 2015-04-15 |
| CN104518598B CN104518598B (en) | 2018-05-22 |
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| CN201410050592.8A Active CN104518598B (en) | 2013-10-08 | 2014-02-14 | Sealed electrical compressor and air-conditioning device |
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| JP (1) | JP6261271B2 (en) |
| CN (1) | CN104518598B (en) |
Cited By (3)
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| CN107534342A (en) * | 2015-04-30 | 2018-01-02 | 三菱电机株式会社 | Electric rotating motivation and compressor |
| CN108604850A (en) * | 2016-02-03 | 2018-09-28 | 三菱电机株式会社 | Electric rotating machine |
| US20210262710A1 (en) * | 2018-08-20 | 2021-08-26 | Daikin Industries, Ltd. | Refrigeration cycle apparatus |
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|---|---|---|---|---|
| DE112019001461T5 (en) | 2018-03-22 | 2020-12-31 | Mitsubishi Electric Corporation | STATOR FOR ELECTRIC ROTARY MACHINE |
| JP6914419B2 (en) * | 2018-08-09 | 2021-08-04 | 日立ジョンソンコントロールズ空調株式会社 | Sealed electric compressor and refrigerating air conditioner using it |
| JP7317525B2 (en) * | 2019-03-08 | 2023-07-31 | 三菱重工サーマルシステムズ株式会社 | electric compressor |
| JPWO2021064984A1 (en) * | 2019-10-04 | 2021-04-08 |
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| US20210262710A1 (en) * | 2018-08-20 | 2021-08-26 | Daikin Industries, Ltd. | Refrigeration cycle apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6261271B2 (en) | 2018-01-17 |
| CN104518598B (en) | 2018-05-22 |
| JP2015076953A (en) | 2015-04-20 |
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