CN103511269B - Sealed electrical compressor - Google Patents
Sealed electrical compressor Download PDFInfo
- Publication number
- CN103511269B CN103511269B CN201210299069.XA CN201210299069A CN103511269B CN 103511269 B CN103511269 B CN 103511269B CN 201210299069 A CN201210299069 A CN 201210299069A CN 103511269 B CN103511269 B CN 103511269B
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- Prior art keywords
- permanent magnet
- magnet
- rare earth
- heavy rare
- magnetization
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Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
Abstract
The invention provides a kind of guarantee motor magnetic force and improve the sealed electrical compressor of the confining force of Nd-Fe-B system sintered magnet.Sealed electrical compressor possesses the refrigeration agent compression mechanical part compressed and the motor driving compression mechanical part, motor comprises the stator with coil and the rotor with iron core and permanent magnet, permanent magnet is made up of the Nd-Fe-B compound that with the addition of middle heavy rare earth dvielement, the amount of refrigeration agent to be grain circle apart from parent phase grain of R32, Nd-Fe-B compound the be middle heavy rare earth dvielement of the per unit volume of 5nm more than grain circle apart from parent phase grain than the amount of heavy rare earth dvielement in 5nm per unit volume close to the inner portion.
Description
Technical field
The present invention relates at middle sealed electrical compressors used such as refrigeration air-conditioners.
Background technique
In the past, in refrigerator, air conditioner, refrigerated warehouse etc., used the hydrogeneous not Leon of R-134a, R410A, R407C etc. as refrigeration agent.Although these refrigeration agents can not damage the ozone layer, global warming coefficient is large.
On the other hand, R32 can not damage the ozone layer, and compared with R410A, global warming coefficient is about 1/3.
But when adopting R32 as refrigeration agent, compared with R-134a, R410A or R407C, compressor ejection temperature is high, and the permanent magnet used in the motor of compressor may demagnetize.
In patent documentation 1, describing following situation: when using R32 as refrigeration agent, by increasing the thickness of the rare earth element magnet used in motor, improving the durability for high temperature demagnetize.
In addition, describe in patent documentation 2 and be replaced into by a part of the Nd by Nd-Fe-B system sintered magnet the situation that Dy improves heat resistance.
[at first technical paper]
[patent documentation]
[patent documentation 1] Japanese Unexamined Patent Publication 2001-115963 publication
[patent documentation 2] Japanese Unexamined Patent Publication 2008-86128 publication
But the compressor of patent documentation 1 adds the thickness of rare earth element magnet, correspondingly, the size of the magnet core be made up of electromagnetic steel plate is restricted.Therefore, the core volume of electromagnetic steel plate correspondingly reduces magnet increasing amount, exists and cannot guarantee the problem that the magnetic force of motor is such.
In addition, there is following problem in the electric rotating machine of patent documentation 2: saturated poleization reduces, and cannot guarantee necessary relict flux density, thus cannot guarantee the magnetic force of motor.
Summary of the invention
The object of the invention is to provide a kind of magnetic force guaranteeing motor, and promotes the confining force of Nd-Fe-B system sintered magnet and improve the sealed electrical compressor of the durability for high temperature demagnetize.
In order to solve above-mentioned problem, in sealed electrical compressor of the present invention, possess the refrigeration agent compression mechanical part compressed and the motor driving compression mechanical part, motor comprises the stator with coil and the rotor with iron core and permanent magnet, permanent magnet is made up of the Nd-Fe-B compound that with the addition of middle heavy rare earth dvielement, the amount of refrigeration agent to be grain circle apart from parent phase grain of R32, Nd-Fe-B compound the be middle heavy rare earth dvielement of the per unit volume of 5nm more than grain circle apart from parent phase grain than the amount of heavy rare earth dvielement in 5nm per unit volume close to the inner portion.
[invention effect]
According to the present invention, the magnetic force of motor can be guaranteed and improve the confining force of Nd-Fe-B system sintered magnet.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional view of sealed electrical compressor.
Fig. 2 is the stereogram of the part section representing rotor.
Fig. 3 is the figure of the number representing permanent magnet accommodation section and permanent magnet.
Fig. 4 is the Metal Distribution figure of the parent phase intragranular of Nd-Fe-B compound.
Fig. 5 is the partial sectional view of 1 maximum dose representing permanent magnet accommodation section and permanent magnet.
Fig. 6 is the graph of a relation that the temperature of magnet and demagnetize start electric current.
[symbol description]
1 seal container
1a cylinder portion
1b cap
Bottom 1c
2 compressing mechanisms
3 fixed eddy plates
4 convolution whirlpool dishes
5 frameworks
5a main bearing
6 axles
6a cam pin portion
6b through hole
7 motor
7a rotor
7b stator
8 lubricant oil
9 long-pending oil places
10 euclidean Rings
11 suction pipes
12 suction ports
14 ejiction openings
15 supplementary bearings
16 balancer weights
The upper balancer weight of 16a
Balancer weight under 16b
17 coil-end
18a, 18b spray gas passageway
The space of the top of 20 motor
The space of the below of 21 motor
22 spraying pipes
23,25 iron cores
24 coils
30 rivets
31 magnet accommodation sections
33 permanent magnets
34Nd
2fe
14b compound
35 boundaries
36 alloys being rich in Dy
Heavy rare earth dvielement in 37
50 sealed electrical compressors
51 poles portion
52 interpolar portions
Embodiment
About the structure, action, function etc. of the entirety of the sealed electrical compressor 50 of present embodiment, be described with reference to Fig. 1 ~ Fig. 3.
Fig. 1 is the longitudinal sectional view of sealed electrical compressor.Sealed electrical compressor 50 as refrigerating air conditioning device (such as, air conditioner, refrigerated warehouse, freezer, Leng KURA refrigerated display case etc.) or heat pump type hot watering supply device etc. refrigeration cycle structural device and use, possess seal container 1, compressing mechanism 2 and motor 7 as main structure key element.
Seal container 1 comprises cylindric cylinder portion 1a and at the cap 1b of the deposition up and down of cylinder portion 1a and bottom 1c, inside is confined space.Seal container 1 receives compressing mechanism 2 and motor 7, and accumulates the lubricant oil 8 be made up of ether system or ester system refrigerating machine oil at bottom 1c.The pasta of lubricant oil 8 is set as the top being positioned at supplementary bearing 15.
Be provided with by suction pipe 11 through for the cap 1b of seal container 1 with by spraying pipe 22 through for the cylinder portion 1a of seal container 1.Spraying pipe 22 is positioned at immediately below framework 5, projecting to the central direction in seal container 1.The front end of spraying pipe 22 is projected into central side and opening from the outer circumferential face of coil-end 17.
The refrigerant gas of compressing mechanism 2 couples of R32 compresses and is ejected in seal container 1, and is arranged on the top in seal container 1.Compressing mechanism 2 possesses fixed eddy plate 3, convolution whirlpool dish 4, framework 5 and euclidean Ring 10 as main structure key element.
Fixed eddy plate 3 is erect and is arranged the roll bending of scroll and form on end plate, and bolton is on framework 5.Be provided with suction port 12 at the peripheral portion of fixed eddy plate 3, be provided with ejiction opening 14 at central part.Suction pipe 11 is communicated with suction port 12.Ejiction opening 14 is communicated with the superjacent air space of the compressing mechanism 2 in seal container 1.
Convolution whirlpool dish 4 setting on end plate arranges the roll bending of scroll and forms, and convolution whirlpool dish 4 is clamped between fixed eddy plate 3 and framework 5.Convolution whirlpool dish 4 engages with fixed eddy plate 3 and forms pressing chamber.The lug boss loading convolution bearing is provided with at the fixed eddy plate opposition side of convolution whirlpool dish 4.Be fitted together at convolution bearing to carry out eccentric drive to convolution whirlpool dish 4 and have cam pin portion 6a.
Euclidean Ring 10 forms the rotation limting mechanism that convolution whirlpool coils 4, is arranged between convolution whirlpool dish 4 and framework 5, prevents convolution whirlpool dish 4 certainly then carries out circular orbit motion.
Framework 5 is fixed on seal container 1 by welding, and supports fixed eddy plate 3, euclidean Ring 10 and convolution whirlpool dish 4.Outstanding cylinder portion is provided with downwards in the central authorities of framework 5.Main bearing 5a axle 6 being carried out to axle supporting is provided with in this portion.
The multiple ejection gas passageway 18a be communicated with the underlying space of framework 5 by the superjacent air space of fixed eddy plate 3 are formed at the peripheral part of fixed eddy plate 3 and framework 5.
Motor 7 possesses rotor 7a, stator 7b, axle 6 and balancer weight 16 as main structure key element.
The main structure key element of stator 7b comprises: electric current is flow through and produces the coil 24 with multiple conductor of rotating magnetic field; For transmitting the iron core 23 of rotating magnetic field expeditiously.
Iron core 23 carries out shrink fit and is fixed on seal container 1.Be formed with multiple otch at the complete cycle of the periphery of this stator 7b, be formed between this otch and seal container 1 and spray gas passageway 18b.
Fig. 2 is the stereogram of the part section representing rotor.Rotor 7a possesses iron core 25 and is built in the permanent magnet 33 of iron core 25 as main structure key element, converts the rotating magnetic field from stator 7b to rotary motion and rotates centered by axle 6.Rotor 7a is rotatably configured in the central hole of iron core 23 of stator 7b.
Axle 6 is chimeric with the central hole of rotor 7a and carry out integrated with rotor 7a.The side (being upside in illustrated example) of axle 6 is outstanding and engage with compressing mechanism 2 from rotor 7a, by compressing mechanism 2 compressed action and be applied in eccentric force.In the present embodiment, the both sides of axle 6 are given prominence to from the both sides of rotor 7a, carry out axle supporting, thus can stably rotate in the both sides of rotor 7a by main bearing 5a and supplementary bearing 15.Supplementary bearing 15 is fixed on the support member supporting of seal container 1 by welding, and is immersed in lubricant oil 8.
The lower end of axle 6 extends in the long-pending oil place 9 of the bottom of seal container 1.Be provided with the through hole 6b supplied to each bearing portion and each slip surface by lubricant oil 8 at axle 6, by the long-pending oil 9 of underpart, lubricant oil 8 drawn from through hole 6b.The lubricant oil 8 drawn from Ji Youchu 9 by axle through hole at compressing mechanism 2 is to the slide part supply of each bearing and compressing mechanism 2.The ejiction opening 14 of lubricant oil 8 from the central part of fixed eddy plate 3 together with refrigerant gas being supplied to the slide part of compressing mechanism 2 sprays.
Balancer weight 16 comprises upper balancer weight (compressing mechanism lateral balance weight) 16a and lower balancer weight (the compressing mechanism opposition side balancer weight) 16b of the both sides being arranged on rotor 7a, is fixed on rotor 7a by multiple rivet 30.
When motor 7 is energized, rotor 7a rotates, be accompanied by this, axle 6 also rotates, and cam pin portion 6a carries out eccentric rotary motion, drive dish 4 convolution of convolution whirlpool thus, be formed in fixed eddy plate 3 and the convolution pressing chamber limit of coiling between 4, whirlpool is moved limit and reduced from outer circumferential side to central part.Thus, the suction pipe 11 be communicated with by the refrigeration cycle of the outside with seal container 1 and suction port 12 and suck refrigerant gas and compress, the refrigerant gas after compression is from the ejiction opening 14 of the central part of fixed eddy plate 3 to the upper space ejection in seal container 1.Repeatedly carry out above-mentioned action.
It should be noted that, the coil 24 of stator 7b reels in concentratred winding mode.
Fig. 3 is the figure of the number representing permanent magnet accommodation section and permanent magnet.And rotor 7a possesses the permanent magnet 33 be inserted in multiple magnet accommodation section 31, by lower balancer weight 16b etc., the lower surface of magnet accommodation section 31 is inaccessible, permanent magnet 33 is kept in order to avoid it falls.
The permanent magnet 33 be inserted in each magnet accommodation section 31 is made up of multiple, and is supported by lower balancer weight 16b.Like this, by being divided into multiple by permanent magnet 33, and following effect can be obtained.The first, the cost that can realize permanent magnet monomer reduces.The second, produce eddy current due to the impact in the magnetic field from stator 7b at permanent magnet 33, but eddy current damage can be reduced by being split by permanent magnet 33.
It should be noted that, the permanent magnet 33 be inserted in magnet accommodation section 31 is made up of 1 magnet.
In addition, rotor 7a comprises and imbeds the pole portion 51 of permanent magnet and the interpolar portion 52 between pole portion 51.The length X of the radial direction in interpolar portion 52 is shorter than the length Y of the radial direction in pole portion 51, can reduce the width of the iron core that leakage magnetic flux is passed through thus, thus can reduce the leakage magnetic flux of permanent magnet 33.
Fig. 4 is the Metal Distribution figure of the parent phase intragranular of Nd-Fe-B compound.Permanent magnet 33 is with Nd
2fe
14b compound component alloy is primary coil, when magnet sinters, is mixed by the alloy 36 being rich in Dy, and thus, this alloy is to surround Nd
2fe
14the mode of B compound 34 is to diffusion profile near grain circle 35.Nd-Fe-B magnet becomes coercive force in the size of the external magnetic field that crystal grain interface is generated by the core of anti-magnetic region.
The structure at crystal grain interface can cause strong impact to the karyogenesis of anti-magnetic region, and the disorder of the crystal structure of near interface can cause the disorder of magnetic structure, thus encourages the generation of anti-magnetic region.It has been generally acknowledged that apart from crystalizing interface to be that the magnetic structure of the degree of depth of about 5nm can work to the growth encourage of the generation of anti-magnetic region.In contrast, due to Dy or Tb such in heavy rare earth dvielement 37 integrated distribution near grain circle 35, compared with the equally distributed situation of heavy rare earth dvielement 37 in Dy or Tb etc., can confining force be improved.Here, refer near grain circle 35 that the distance crystalizing interface in parent phase grain is the degree of depth of about 5nm.
Therefore, by heavy rare earth dvielement 37 near Shi Li circle 35 relative to the ratio of Nd be greater than than near grain circle 35 close to the inner portion in the ratio of heavy rare earth dvielement 37, and can coercive force be improved.
And, the amount of the middle heavy rare earth dvielement 37 near grain circle of parent phase grain more than near grain circle than parent phase grain close to the inner portion in the amount of heavy rare earth dvielement 37.According to such structure, near grain circle than parent phase grain close to the inner portion, the amount to the inoperative middle heavy rare earth dvielement 37 of the raising of magnetic force can be reduced, thus the relict flux density of permanent magnet 33 can be improved.
The Mean particle diameter of parent phase grain is about 0.5 ~ 20 μm, as described above, refers to that the distance crystalizing interface in parent phase grain is the degree of depth of about 5nm near grain circle 35.That is, near grain circle heavy rare earth dvielement 37 amount more than near grain circle than parent phase grain close to the inner portion in the amount of heavy rare earth dvielement 37, then than near grain circle of parent phase grain close to the inner portion in heavy rare earth dvielement 37 comparatively unfertile land distribution.Therefore, it is possible to improve the relict flux density of permanent magnet 33 significantly.And, the total amount of heavy rare earth dvielement 37 in can reducing, thus the original cost of permanent magnet 33 can be suppressed.
It should be noted that, the relict flux density of permanent magnet 33 of the present invention increases, and correspondingly, when the manufacture of compressor, is difficult to permanent magnet 33 to magnetize, and therefore needs to improve and magnetizes the magnetizing voltage of permanent magnet 33.
Fig. 5 is the partial sectional view of 1 maximum dose representing permanent magnet accommodation section and permanent magnet.Permanent magnet 33 is accommodated in magnet accommodation section 31.Permanent magnet 33 is cuboid, and the area in the face in the direction of magnetization of permanent magnet 33 is greater than the area in the face in the Vertical direction vertical with the direction of magnetization of permanent magnet 33.
When during Dy or Tb is such, heavy rare earth dvielement 37 is partial near grain circle, due to dispersion-strengthened and slide distortion restricted, the tolerance for moment strengthens.But when during Dy or Tb is such, heavy rare earth dvielement 37 is partial near grain circle, fragility is deteriorated.
The power that permanent magnet 33 produces due to magnetic force is large, therefore the situation considering movement in magnet accommodation section 31 is difficult to, but because the inertial force that accompanies with the acceleration or deceleration of rotor 7a or centrifugal force put on permanent magnet 33, therefore permanent magnet 33 may move in magnet accommodation section 31.Therefore, even if hypothesis permanent magnet 33 is mobile in magnet accommodation section 31, also need the possibility by the permanent magnet 33 of fragility deterioration and magnet accommodation section 31 collide and cause a boundary to break to reduce.The area in the face the direction (hereinafter referred to as " Vertical direction vertical with the direction of magnetization of permanent magnet 33 ") especially in the Vertical direction vertical with the direction of magnetization of permanent magnet 33 and from pole portion 51 to interpolar portion 52 is little, and therefore stress is concentrated and easily causes a boundary to break.
On the other hand, gap is needed in order to be inserted to magnet accommodation section 31 by permanent magnet 33.Especially in order to tackle the size error of permanent magnet 33, needing to arrange the gap of regulation and permanent magnet 33 can be inserted to magnet accommodation section 31.
As shown in Figure 5, in sealed electrical compressor of the present invention, the permanent magnet 33 in the Vertical direction vertical with the direction of magnetization of permanent magnet 33 and the gap P between magnet accommodation section 31 narrower than the gap Q between the permanent magnet 33 in the direction of magnetization of permanent magnet 33 and magnet accommodation section 31.
According to such structure, the space of regulation is set by arranging gap Q in magnet accommodation section 31, thus the size error of permanent magnet 33 can be tackled.And, because gap P is narrower than gap Q, permanent magnet 33 therefore can be prevented along the situation of the Vertical direction movement vertical with the direction of magnetization, thus stress can be avoided to concentrate on the situation of the interpolar side end of permanent magnet 33.Therefore, it is possible to reduce the possibility causing a boundary to break at the interpolar side end of permanent magnet 33.
It should be noted that, the shape of permanent magnet 33 is that cuboid refers to the shape with face, comprises situation about being eliminated at the angle of cuboid.
In addition, the permanent magnet 33 also magnet accommodation section 31 can accommodated is split multiple along the Vertical direction vertical with the direction of magnetization of permanent magnet 33.Because multiple permanent magnet 33 is accommodated along the Vertical direction vertical with the direction of magnetization of permanent magnet 33 in magnet accommodation section 31, and the area of permanent magnet 33 in the Vertical direction vertical with the direction of magnetization of permanent magnet 33 increases, therefore, it is possible to avoid stress to concentrate.
When multiple permanent magnet 33 is housed in magnet accommodation section 31, the size error of permanent magnet 33 need reply by the number Xiang of the permanent magnet 33 of collecting ?and the value that obtains.Therefore, below the value making gap P obtain for number that gap Q is multiplied by permanent magnet 33.
According to such structure, the space of regulation is set by arranging gap P and gap Q in magnet accommodation section 31, thus the size error of permanent magnet 33 can be tackled.And, by reducing the length along the Vertical direction movement vertical with the direction of magnetization of permanent magnet 33, and the interpolar side end of permanent magnet 33 can be avoided stress concentration at.
It should be noted that, in the present embodiment, gap Q is 0.1mm.When gap Q becomes large, correspondingly, the air layer between permanent magnet 33 in the direction of magnetization and iron core 25 can be formed, the decline of magnetic force can be caused, therefore, it is possible to gap Q to be formed as the length specified.
Fig. 6 is the graph of a relation that the temperature of magnet and demagnetize start electric current.As effect concept map of the present invention, represent the relation starting current value by the temperature formed and demagnetize of permanent magnet 33, represent the relation based on the temperature use territory of the kind of refrigeration agent, the control electric current of compressor.
Compared with using the situation of R410A, when using R32, because ejection gas temperature rises, and the atmosphere temperature in seal container 1 also rises, and the temperature of permanent magnet 33 also rises.Therefore, when using existing ferromagnetic material, control electric current exceedes demagnetize and starts electric current, can cause hydraulic performance decline due to the decline of relict flux density.
In contrast, according to the present invention, at the same temperature, compared with existing ferromagnetic material, improving coercive force, demagnetize can being started current boost for controlling more than electric current.Thereby, it is possible to provide the compressor that a kind of heat durability is high.
In addition, concentrate due to heavy rare earth dvielement in making Dy or Tb such 37 and be distributed in the surface of particle, therefore compared with the displacement of particle entirety, the adding quantity of the middle heavy rare earth dvielement 37 that Dy or Tb can be suppressed such, correspondingly, can increase Nd
2fe
14the ratio of B compound, therefore, it is possible to improve relict flux density.
As described above, hermetic type compressor of the present invention possesses the refrigeration agent compressing mechanism 2 compressed and the motor 7 driving compressing mechanism 2, motor 7 comprises the stator 7b with coil and the rotor 7a with iron core 25 and permanent magnet 33, permanent magnet 33 is made up of the Nd-Fe-B compound that with the addition of middle heavy rare earth dvielement 37, refrigeration agent is R32, grain circle apart from parent phase grain of Nd-Fe-B compound be the amount of the middle heavy rare earth dvielement of the per unit volume of 5nm more than grain circle apart from parent phase grain than the amount of heavy rare earth dvielement in 5nm per unit volume close to the inner portion.
In addition, in hermetic type compressor of the present invention, grain circle 35 apart from parent phase grain of Nd-Fe-B compound be the middle heavy rare earth dvielement 37 of 5nm amount more than distance parent phase grain grain circle 35 than 5nm close to the inner portion in the amount of heavy rare earth dvielement 37.
In hermetic type compressor of the present invention, rotor 7a has the magnet accommodation section 31 of collecting permanent magnet 33, permanent magnet 33 is cuboid, the area in the face in the direction of magnetization of permanent magnet 33 is greater than the area in the face in the Vertical direction vertical with the direction of magnetization of permanent magnet 33, the permanent magnet 33 in the Vertical direction vertical with the direction of magnetization of permanent magnet 33 and the gap P between magnet accommodation section 31 narrower than the gap Q between the permanent magnet 33 in the direction of magnetization of permanent magnet 33 and magnet accommodation section 31.
In hermetic type compressor of the present invention, multiple permanent magnet 33 is accommodated along the Vertical direction vertical with the direction of magnetization of permanent magnet 33 in magnet accommodation section 31.
In hermetic type compressor of the present invention, the value that the number that the permanent magnet 33 of being accommodated by magnet accommodation section 31 is multiplied by than the gap between the permanent magnet 33 in the direction of magnetization of permanent magnet 33 and magnet accommodation section 31 in the multiple permanent magnets 33 in the interpolar side end of permanent magnet 33 and the gap between magnet accommodation section 31 obtains is narrow.
According to hermetic type compressor of the present invention, spray temperature to rise owing to compressing the refrigerant gas of R32, the permanent magnet 33 being arranged at rotor 7a due to the refrigerant gas of the ejection of flowing in seal container 1 is heated and is carried out high temperature demagnetize, for such problem, be partial near grain circle 35 of the parent phase intragranular of Nd-Fe-B compound by making middle heavy rare earth dvielement 37 i.e. Dy, and the decline of relict flux density can be suppressed and effectively increase coercive force, therefore, it is possible to improve durability expeditiously.
Claims (3)
1. a sealed electrical compressor, wherein,
Possess the refrigeration agent compression mechanical part compressed and the motor driving described compression mechanical part,
Described motor comprises the stator with coil and the rotor with iron core and permanent magnet,
Described permanent magnet is by the Nd-F that with the addition of middle heavy rare earth dvielement
e-B compound is formed,
Described refrigeration agent is R32,
Described Nd-F
egrain circle apart from parent phase grain of-B compound be the amount of the described middle heavy rare earth dvielement of the per unit volume of 5nm more than grain circle apart from described parent phase grain than the amount of the described middle heavy rare earth dvielement of 5nm per unit volume close to the inner portion,
Described rotor has the magnet accommodation section of accommodating described permanent magnet,
Described permanent magnet is cuboid,
The area in the face in the direction of magnetization of described permanent magnet is greater than the area in the face on the direction vertical with the direction of magnetization of described permanent magnet,
Described permanent magnet on the direction vertical with the direction of magnetization of described permanent magnet and the gap between described magnet accommodation section than the described permanent magnet in the direction of magnetization of described permanent magnet and the gap between described magnet accommodation section narrow.
2. a sealed electrical compressor, wherein,
Possess the refrigeration agent compression mechanical part compressed and the motor driving described compression mechanical part,
Described motor comprises the stator with coil and the rotor with iron core and permanent magnet,
Described permanent magnet is by the Nd-F that with the addition of middle heavy rare earth dvielement
e-B compound is formed,
Described refrigeration agent is R32,
Described Nd-F
egrain circle apart from parent phase grain of-B compound be the amount of the described middle heavy rare earth dvielement of the per unit volume of 5nm more than grain circle apart from described parent phase grain than the amount of the described middle heavy rare earth dvielement of 5nm per unit volume close to the inner portion,
Described rotor has the magnet accommodation section of accommodating described permanent magnet,
Multiple described permanent magnet is accommodated along the direction vertical with the direction of magnetization of described permanent magnet in described magnet accommodation section,
Described permanent magnet is respectively cuboid,
The area in the face in the direction of magnetization of described permanent magnet is greater than the area in the face on the direction vertical with the direction of magnetization of described permanent magnet,
Described permanent magnet on the direction vertical with the direction of magnetization of described permanent magnet and the gap between described magnet accommodation section narrower than following values, described value is the value that number that the described permanent magnet of being accommodated by described magnet accommodation section is multiplied by described permanent magnet in the direction of magnetization of described permanent magnet and the gap between described magnet accommodation section obtains.
3. sealed electrical compressor according to claim 1 and 2, is characterized in that,
Described Nd-F
egrain circle apart from parent phase grain of-B compound be the amount of the described middle heavy rare earth dvielement of 5nm more than grain circle apart from described parent phase grain than the amount of 5nm described middle heavy rare earth dvielement close to the inner portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610115884.4A CN105673493B (en) | 2012-06-28 | 2012-08-21 | Sealed electrical compressor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012144911A JP5823928B2 (en) | 2012-06-28 | 2012-06-28 | Hermetic electric compressor |
| JP2012-144911 | 2012-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610115884.4A Division CN105673493B (en) | 2012-06-28 | 2012-08-21 | Sealed electrical compressor |
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| Publication Number | Publication Date |
|---|---|
| CN103511269A CN103511269A (en) | 2014-01-15 |
| CN103511269B true CN103511269B (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610115884.4A Active CN105673493B (en) | 2012-06-28 | 2012-08-21 | Sealed electrical compressor |
| CN201210299069.XA Active CN103511269B (en) | 2012-06-28 | 2012-08-21 | Sealed electrical compressor |
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| JP2015208053A (en) * | 2014-04-17 | 2015-11-19 | 日立アプライアンス株式会社 | Permanent magnet type rotary electric machine, and compressor using the same |
| JP6667235B2 (en) * | 2015-09-07 | 2020-03-18 | 日立ジョンソンコントロールズ空調株式会社 | Hermetic electric compressor |
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| JP2001115963A (en) * | 1999-10-13 | 2001-04-27 | Daikin Ind Ltd | Compressor |
| JP2009038930A (en) * | 2007-08-03 | 2009-02-19 | Daikin Ind Ltd | Rotor and embedded magnet type motor |
| CN101490928A (en) * | 2006-07-10 | 2009-07-22 | 丰田自动车株式会社 | IPM rotor, IPM rotor manufacturing method and IPM rotor manufacturing apparatus |
| JP2011211069A (en) * | 2010-03-30 | 2011-10-20 | Tdk Corp | Sintered magnet, motor, automobile, and method for producing the sintered magnet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09168247A (en) * | 1995-10-13 | 1997-06-24 | Tec Corp | Inner rotor brushless motor |
| CN2862478Y (en) * | 2005-10-31 | 2007-01-24 | 上海日立电器有限公司 | Magnetic-iron built-in type permanent magnetic synchro speed regulation motor rotor |
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- 2012-06-28 JP JP2012144911A patent/JP5823928B2/en active Active
- 2012-08-21 CN CN201610115884.4A patent/CN105673493B/en active Active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001115963A (en) * | 1999-10-13 | 2001-04-27 | Daikin Ind Ltd | Compressor |
| CN101490928A (en) * | 2006-07-10 | 2009-07-22 | 丰田自动车株式会社 | IPM rotor, IPM rotor manufacturing method and IPM rotor manufacturing apparatus |
| JP2009038930A (en) * | 2007-08-03 | 2009-02-19 | Daikin Ind Ltd | Rotor and embedded magnet type motor |
| JP2011211069A (en) * | 2010-03-30 | 2011-10-20 | Tdk Corp | Sintered magnet, motor, automobile, and method for producing the sintered magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103511269A (en) | 2014-01-15 |
| JP5823928B2 (en) | 2015-11-25 |
| CN105673493B (en) | 2018-11-13 |
| JP2014011829A (en) | 2014-01-20 |
| CN105673493A (en) | 2016-06-15 |
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