U.S. patent application number 14/007171 was filed with the patent office on 2014-03-06 for scroll compression device and method for magnetizing scroll compression device.
This patent application is currently assigned to SANYO ELECTRIC CO., LTD.. The applicant listed for this patent is Kenji Aida, Katsuki Akuzawa, Akihiro Hayashi, Satoshi Iitsuka, Yasunori Kiyokawa, Tsutomu Kon, Yoshiaki Nagasawa, Yoshihiko Nagase, Kazuyoshi Sugimoto. Invention is credited to Kenji Aida, Katsuki Akuzawa, Akihiro Hayashi, Satoshi Iitsuka, Yasunori Kiyokawa, Tsutomu Kon, Yoshiaki Nagasawa, Yoshihiko Nagase, Kazuyoshi Sugimoto.
Application Number | 20140064995 14/007171 |
Document ID | / |
Family ID | 46878937 |
Filed Date | 2014-03-06 |
United States Patent
Application |
20140064995 |
Kind Code |
A1 |
Iitsuka; Satoshi ; et
al. |
March 6, 2014 |
SCROLL COMPRESSION DEVICE AND METHOD FOR MAGNETIZING SCROLL
COMPRESSION DEVICE
Abstract
A scroll compression device that enhances the efficiency of
workability of magnetization of windings is provided. A scroll
compression mechanism 11 for compressing refrigerant and a driving
shaft 13 that is connected to the scroll compression mechanism 11
through a driving shaft 15 and drives the scroll compression
mechanism 11 are accommodated in a casing 3, the scroll compression
mechanism 11 is supported in the casing 3 by a main frame 21, a
rotor 39 of the driving motor 13 is connected to the driving shaft
15, the driving shaft 15 is supported in the casing 3 by a bearing
plate 8, a pickup 45 is connected to an oil supply path 41
extending in an up-and-down direction in the driving shaft 15, and
a holder 58 extending in a radial direction is provided in the oil
supply path 41 at the back side of the pickup 45.
Inventors: |
Iitsuka; Satoshi;
(Gunma-ken, JP) ; Kon; Tsutomu; (Gunma-ken,
JP) ; Hayashi; Akihiro; (Gunma-ken, JP) ;
Akuzawa; Katsuki; (Gunma-ken, JP) ; Aida; Kenji;
(Gunma-ken, JP) ; Nagasawa; Yoshiaki; (Gunma-ken,
JP) ; Sugimoto; Kazuyoshi; (Gunma-ken, JP) ;
Kiyokawa; Yasunori; (Gunma-ken, JP) ; Nagase;
Yoshihiko; (Gunma-ken, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Iitsuka; Satoshi
Kon; Tsutomu
Hayashi; Akihiro
Akuzawa; Katsuki
Aida; Kenji
Nagasawa; Yoshiaki
Sugimoto; Kazuyoshi
Kiyokawa; Yasunori
Nagase; Yoshihiko |
Gunma-ken
Gunma-ken
Gunma-ken
Gunma-ken
Gunma-ken
Gunma-ken
Gunma-ken
Gunma-ken
Gunma-ken |
|
JP
JP
JP
JP
JP
JP
JP
JP
JP |
|
|
Assignee: |
SANYO ELECTRIC CO., LTD.
Moriguchi-shi, Osaka
JP
|
Family ID: |
46878937 |
Appl. No.: |
14/007171 |
Filed: |
December 20, 2011 |
PCT Filed: |
December 20, 2011 |
PCT NO: |
PCT/JP2011/079465 |
371 Date: |
October 16, 2013 |
Current U.S.
Class: |
417/410.5 ;
361/143 |
Current CPC
Class: |
F04C 18/0207 20130101;
F04C 23/008 20130101; F04C 29/026 20130101; F04C 29/0085 20130101;
F04C 29/0078 20130101; F04C 18/0215 20130101; F04C 23/02 20130101;
F04C 29/028 20130101 |
Class at
Publication: |
417/410.5 ;
361/143 |
International
Class: |
F04C 23/02 20060101
F04C023/02; F04C 29/00 20060101 F04C029/00; F04C 18/02 20060101
F04C018/02 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 24, 2011 |
JP |
2011-065607 |
Mar 25, 2011 |
JP |
2011-066920 |
Mar 25, 2011 |
JP |
2011-066921 |
Mar 25, 2011 |
JP |
2011-067051 |
Claims
1. A scroll compression device, characterized in that a scroll
compression mechanism for compressing refrigerant and a driving
shaft that is connected to the scroll compression mechanism through
a driving shaft and drives the scroll compression mechanism are
accommodated in a casing: the scroll compression mechanism is
supported in the casing by a main frame; a rotor of the driving
motor is connected to the driving shaft, the driving shaft is
supported in the casing by a bearing plate; a pickup is connected
to an oil supply path extending in an up-and-down direction in the
driving shaft; and a holder extending in a radial direction is
provided in the oil supply path at the back side of the pickup.
2. The scroll compression device according to claim 1, wherein the
holder is a pin member penetrating through the oil supply path.
3. The scroll compression device according to claim 1, wherein a
lower balancer is provided to a lower portion of the rotor of the
driving motor, a regulation plate for regulating rotation of the
rotor is provided to the lower surface of the lower balancer, and a
plurality of lock groove portions are provided on the outer
periphery of the regulation plate.
4. The scroll compression device according to claim 3, wherein the
bearing plate has a plurality of opening portions through which
spaces above and below the bearing plate intercommunicate with each
other, and the inner dimension of the plurality of lock groove
portions of the regulation plate is set to be larger than the inner
dimension of the plurality of opening portions.
5. The scroll compression device according to claim 1, wherein the
driving motor is a DC driving motor driven by an inverter.
6. A magnetizing method for the scroll compression device according
to claim 1, comprising: detaching the pickup, inserting a rotating
jig into the oil supply path; and repeating an operation of locking
the tip of the rotating jig to the holder, rotating the driving
shaft by a predetermined angle and then stopping the driving shaft
through operation of the rotating jig, applying a voltage to
windings of the driving motor, rotating the driving shaft by a
predetermined angle and stopping the driving shaft again, and
applying the voltage to thereby magnetize the rotor.
7. A magnetizing method for the scroll compression device according
to claim 4, comprising: detaching the pickup, inserting a rotating
jig into the oil supply path; and repeating an operation of locking
the tip of the rotating jig to the holder, rotating the driving
shaft by a predetermined angle and then stopping the driving shaft
through operation of the rotating jig, applying a voltage to
windings of the driving motor, rotating the driving shaft by a
predetermined angle and stopping the driving shaft again, and
applying the voltage to thereby magnetize the rotor, wherein a
rotation regulation jig is locked to the plurality of lock groove
portions provided on the outer periphery of the regulation plate,
and rotation of the rotor under the magnetization is regulated by
the rotation regulating jig.
8. The scroll compression device according to claim 2, wherein a
lower balancer is provided to a lower portion of the rotor of the
driving motor, a regulation plate for regulating rotation of the
rotor is provided to the lower surface of the lower balancer, and a
plurality of lock groove portions are provided on the outer
periphery of the regulation plate.
9. The scroll compression device according to claim 2, wherein the
driving motor is a DC driving motor driven by an inverter.
10. The scroll compression device according to claim 3, wherein the
driving motor is a DC driving motor driven by an inverter.
11. The scroll compression device according to claim 4, wherein the
driving motor is a DC driving motor driven by an inverter.
12. A magnetizing method for the scroll compression device
according to claim 2, comprising: detaching the pickup; inserting a
rotating jig into the oil supply path; and repeating an operation
of locking the tip of the rotating jig to the holder, rotating the
driving shaft by a predetermined angle and then stopping the
driving shaft through operation of the rotating jig, applying a
voltage to windings of the driving motor, rotating the driving
shaft by a predetermined angle and stopping the driving shaft
again, and applying the voltage to thereby magnetize the rotor.
13. A magnetizing method for the scroll compression device
according to claim 3, comprising: detaching the pickup; inserting a
rotating jig into the oil supply path; and repeating an operation
of locking the tip of the rotating jig to the holder, rotating the
driving shaft by a predetermined angle and then stopping the
driving shaft through operation of the rotating jig, applying a
voltage to windings of the driving motor, rotating the driving
shaft by a predetermined angle and stopping the driving shaft
again, and applying the voltage to thereby magnetize the rotor.
14. A magnetizing method for the scroll compression device
according to claim 4, comprising: detaching the pickup; inserting a
rotating jig into the oil supply path; and repeating an operation
of locking the tip of the rotating jig to the holder, rotating the
driving shaft by a predetermined angle and then stopping the
driving shaft through operation of the rotating jig, applying a
voltage to windings of the driving motor, rotating the driving
shaft by a predetermined angle and stopping the driving shaft
again, and applying the voltage to thereby magnetize the rotor.
15. A magnetizing method for the scroll compression device
according to claim 5, comprising: detaching the pickup; inserting a
rotating jig into the oil supply path; and repeating an operation
of locking the tip of the rotating jig to the holder, rotating the
driving shaft by a predetermined angle and then stopping the
driving shaft through operation of the rotating jig, applying a
voltage to windings of the driving motor, rotating the driving
shaft by a predetermined angle and stopping the driving shaft
again, and applying the voltage to thereby magnetize the rotor.
16. A magnetizing method for the scroll compression device
according to claim 5, comprising: detaching the pickup; inserting a
rotating jig into the oil supply path; and repeating an operation
of locking the tip of the rotating jig to the holder, rotating the
driving shaft by a predetermined angle and then stopping the
driving shaft through operation of the rotating jig, applying a
voltage to windings of the driving motor, rotating the driving
shaft by a predetermined angle and stopping the driving shaft
again, and applying the voltage to thereby magnetize the rotor,
wherein a rotation regulation jig is locked to the plurality of
lock groove portions provided on the outer periphery of the
regulation plate, and rotation of the rotor under the magnetization
is regulated by the rotation regulating jig.
Description
TECHNICAL FIELD
[0001] The present invention relates to a scroll compression device
that magnetizes a rotor by passing electric current through
windings of a driving motor supported in a casing.
BACKGROUND ART
[0002] There has been hitherto known a scroll compression device
that has a compression mechanism comprising a fixed scroll and a
swing scroll having mutually engageable spiral laps in a
hermetically sealed casing and in which the compression mechanism
is driven by a driving motor so that the swing scroll makes a
circular motion with respect to the fixed scroll without rotating
on its own axis, thereby performing compression (see Patent
Document 1, for example).
PRIOR ART DOCUMENT
Patent Document
[0003] Patent Document 1: JP-A-2003-035289
SUMMARY OF THE INVENTION
Problem to be solved by the Invention
[0004] In the scroll compression device, bearings for supporting a
driving shaft in a casing are provided at the upper and lower sides
of a driving motor. When a rotor is magnetized by passing current
through stator windings of the driving motor supported in the
casing, it is necessary to rotate the rotor in a magnetization step
and in a check step after the magnetization step. However, it is
not easy that the rotor is rotated to position and check the rotor
under the state that the bearings for supporting the driving shaft
in the casing are provided at the upper and lower sides of the
driving motor, and thus the workability is low.
[0005] The present invention has an object to provide a scroll
compression device that can solve the problem of the above prior
art and enhance the workability of magnetization of windings.
Means of Solving the Problem
[0006] In order to attain the above object, according to the
present invention, a scroll compression device is characterized in
that a scroll compression mechanism for compressing refrigerant and
a driving shaft that is connected to the scroll compression
mechanism through a driving shaft and drives the scroll compression
mechanism are accommodated in a casing; the scroll compression
mechanism is supported in the casing by a main frame; a rotor of
the driving motor is connected to the driving shaft; the driving
shaft is supported in the casing by a bearing plate; a pickup is
connected to an oil supply path extending in an up-and-down
direction in the driving shaft; and a holder extending in a radial
direction is provided in the oil supply path at the back side of
the pickup.
[0007] According to the present invention, with respect to even the
scroll compression device in which the bearings for supporting the
driving shaft in the casing are provided at the upper and lower
sides of the driving motor, the driving shaft can be rotated by
using the holder extending in the radial direction in the oil
supply path. Therefore, the efficiency of workability of
magnetization of windings can be enhanced.
[0008] In this construction, the holder may be a pin member
penetrating through the oil supply path. Furthermore, a lower
balancer may be provided to a lower portion of the rotor of the
driving motor, a regulation plate for regulating rotation of the
rotor may be provided to the lower surface of the lower balancer,
and a plurality of lock groove portions may be provided on the
outer periphery of the regulation plate. Still furthermore, the
bearing plate may have a plurality of opening portions through
which spaces above and below the bearing plate intercommunicate
with each other, and the inner dimension of the plurality of lock
groove portions of the regulation plate may be set to be larger
than the inner dimension of the plurality of opening portions.
Still furthermore, the driving motor may be a DC driving motor
driven by an inverter.
[0009] In order to attain the above object, according to the
present invention, a magnetizing method for the scroll compression
device described above is characterized by comprising: detaching
the pickup; inserting a rotating jig into the oil supply path; and
repeating an operation of locking the tip of the rotating jig to
the holder, rotating the driving shaft by a predetermined angle and
then stopping the driving shaft through operation of the rotating
jig, applying a voltage to windings of the driving motor, rotating
the driving shaft by a predetermined angle and stopping the driving
shaft again, and applying the voltage to thereby magnetize the
rotor.
[0010] In this construction, before the pickup is secured, a
rotating jig may be inserted into the oil supply path, the tip of
the rotating jig may be locked to the holder, and an operation of
locking the tip of the rotating jig to the holder, rotating the
driving shaft by a predetermined angle and then stopping the
driving shaft through operation of the rotating jig, applying a
voltage to windings of the driving motor, rotating the driving
shaft by a predetermined angle and stopping the driving shaft
again, and applying the voltage may be repeated to thereby
magnetize the rotor, and a rotation regulation jig may be locked to
the plurality of lock groove portions provided on the outer
periphery of the regulation plate so that rotation of the rotor
under the magnetization is regulated by the rotation regulating
jig.
Effect of the Invention
[0011] According to the present invention, when the rotor of the
scroll compressor in which the bearings for supporting the driving
shaft in the casing are provided at the upper and lower sides is
magnetized by winding magnetization, the driving shaft can be
rotated by using the holder extending in the radial direction in
the oil supply path before the pickup is connected to the oil
supply path extending in the up-and-down direction in the driving
shaft. Therefore, the efficiency of workability of magnetization of
windings can be enhanced.
BRIEF DESCRIPTION OF THE INVENTION
[0012] FIG. 1 is a cross-sectional view showing a scroll
compression device according to an embodiment of the present
invention.
[0013] FIG. 2 is a perspective view showing a bearing plate.
[0014] FIG. 3 is a cross-sectional view showing the scroll
compression device under magnetization.
[0015] FIG. 4 is a plan view showing the scroll compression device
under magnetization.
MODE FOR CARRYING OUT THE INVENTION
[0016] An embodiment according to the present invention will be
described with reference to the drawings.
[0017] In FIG. 1, reference numeral 1 represents a scroll
compression device whose internal pressure is high. The compression
device 1 is connected to a refrigerant circuit (not shown) in which
refrigerant is circulated to perform a refrigeration cycle
operation, and compresses the refrigerant. The compressor 1 has a
hermetically-sealed doom type casing 3 having a vertically
elongated cylindrical shape.
[0018] The casing 3 is configured as a pressure container to have a
casing main body 3 as a barrel portion having an axial line
extending in the up-and-down direction, a cup-shaped upper cap 7
which is air-tightly welded and integrally joined to the upper end
portion of the casing main body 5 and has a convex surface
protruding upwards, and a cup-shaped lower cap 9 having a convex
surface protruding downwards. The inside of the casing 3 is hollow.
A terminal cover 52 is provided to the outer peripheral surface of
the casing 3, and a power supply terminal 53 for supplying power to
a stator 37 described later is provided in the terminal cover
52.
[0019] In the casing 3 are accommodated a scroll compression
mechanism 11 for compressing refrigerant and a driving motor 13
disposed below the scroll compression mechanism 11. The scroll
compression mechanism 11 and the driving motor 13 are joined to
each other through a driving shaft 15 which is disposed so as to
extend in the up-and-down direction in the casing 3. A gap space 17
is formed between the scroll compression mechanism 11 and the
driving motor 13.
[0020] A main frame 21 is accommodated at the inner upper portion
of the casing 3, and a radial bearing portion 28 and a boss mount
portion 26 are formed at the center of the main frame 21. The
radial bearing portion 28 pivotally supports the tip (upper end)
side of the driving shaft 15, and is configured to project
downwards from the center of one surface (lower side surface) of
the main frame 21. The boss mount portion 26 is used to accommodate
therein a boss 25C of a swing scroll 25 described later, and formed
by concaving the center of the other surface (upper side surface)
of the main frame 21 downwards. An eccentric shaft portion 15A is
formed at the tip (upper end) of the driving shaft 15. The
eccentric shaft portion 15A is provided so that the center thereof
is eccentric from the shaft center of the driving shaft 15, and
inserted through a slewing bearing in the boss 25C so as to be
turnably driven.
[0021] The scroll compression mechanism 11 comprises a fixed scroll
23 and a swing scroll 25. The fixed scroll 23 is disposed in close
contact with the upper surface of the main frame 21. The main frame
21 is secured to the inner surface of the casing main body 5, and
the fixed scroll 23 is fastened and fixed to the main frame 21 by a
screw 34. The swing scroll 25 is engaged with the fixed scroll 23,
and disposed in a swing space 12 formed between the fixed scroll 23
and the main frame 21. The inside of the casing 3 is partitioned
into a high-pressure space 27 below the main frame 21 and a
discharge space 29 above the main frame 21. The respective spaces
27 and 29 intercommunicate with each other through vertical grooves
71 which are formed on the outer peripheries of the main frame 21
and the fixed scroll 23 so as to extend vertically.
[0022] An intake pipe 31 for introducing the refrigerant in the
refrigerant circuit to the scroll compression mechanism 11
air-tightly and fixedly penetrates through the upper cap 7 of the
casing 3, and a discharge pipe 33 for discharging the refrigerant
in the casing 3 to the outside of the casing 3 air-tightly and
fixedly penetrates through the casing main body 5. The intake pipe
31 extends in the up-and-down direction in the discharge space 29,
and the inner end portion thereof penetrates through the fixed
scroll 23 of the scroll compression mechanism 11 and
intercommunicates with the compression chamber 35, whereby the
refrigerant is sucked into the compression chamber 35 through the
intake pipe 31.
[0023] The driving motor (DC driving motor) 13 is a DC (Direct
Current) motor which is actuated upon an input from a DC power
source, and has an annular stator 37 and a rotor 39 which is freely
rotatably configured in the stator 37. The driving motor 13 is
operated while the rotation torque thereof is controlled by a PWM
(Pulse Width Modulation) inverter which receives a constant input
voltage and controls the duty ratio of pulse waves, that is, an
output period of the pulse waves and the pulse width of the output
pulse waves.
[0024] The swing scroll 25 of the scroll compression mechanism 11
is operationally connected to the rotor 39 through the driving
shaft 15. The stator 37 comprises a stator core 37A and a stator
coil 18. The stator core 37A is formed by laminating thin iron
plates and has plural grooves (not shown) therein. The stator coil
18 is formed by winding stator windings of plural phases, and
provided to be fitted in the grooves formed in the stator core 37A
at the upper and lower sides of the stator core 37A. the stator
coil 18 is accommodated in an insulator 19. The stator 18 is
connected to the power supply terminal 53 through a conductive wire
(not shown).
[0025] The rotor 39 is magnetized by ferrite magnet or neodymium.
As a method of magnetizing the rotor 39 is known a winding
magnetizing method of inserting the rotor 39 in the stator 37 and
then passing current through stator windings forming the stator
coil 18 of the stator 37 to magnetize the rotor 39, or an
externally magnetizing method of magnetizing the rotor 39 by using
an external magnetizing device and then inserting the rotor 39 in
the stator 37. A holder (pin holder) 58 described later in detail
is press-fitted into the driving shaft 15, and used to position the
rotor 39 when the winding magnetization of the rotor 39 is
performed.
[0026] The stator 37 is supported on the inner wall of the casing 3
by an annular spacer ring 38. The spacer ring 38 is fixed to the
inner wall surface of the casing 3 by shrinkage fitting, and the
stator 37 is fixed to the inner wall surface of the spacer ring 38
by shrinkage fitting. The upper end surface of the spacer ring 38
is provided at a lower position than the upper end surface of the
stator 37.
[0027] A bearing plate 8 in which the lower end portion of the
driving shaft 15 is rotatably fitted and supported is provided
below the driving motor 13. As shown in FIG. 2, the bearing plate 8
has a boss portion 8A into which the cylindrical driving shaft 15
is fitted, and arm portions 8B which are provided at substantially
equal intervals on the periphery of the boss portion 8A so as to
extend in the four directions and fixed to the casing main body 5.
That is, the driving shaft 15 is supported in the casing 3 by the
bearing plate 8. The bearing plate 8 has opening portions BE which
are formed between the respective arm portions 8B and through which
upper and lower spaces of the bearing plate 8 intercommunicate with
each other.
[0028] As shown in FIG. 1, the lower space (oil pool) 40 below the
bearing plate 8 is kept at high pressure, and oil is pooled at the
inner bottom portion of the lower cap 9 corresponding to the lower
end portion of the lower space 40. An annular plate 59 is provided
between the bearing plate 8 and the oil pool 40 so as to be fixed
to the bearing plate 8. Furthermore, a baffle plate 14 is provided
above the annular plate 59 so as to be supported by the annular
plate 59. The baffle plate 14 is formed of thin plate type punching
metal having many fine pores, for example.
[0029] A oil supply path 41 as a part of high-pressure oil
supplying means is formed in the driving shaft 15, and the oil
supply path 41 extends vertically in the driving shaft 15 and
intercommunicates with an oil chamber 43 at the back side of the
swing scroll 25. The oil supply path 41 is connected to an oil
pickup 45 provided to the lower end of the driving shaft 15. A
lateral hole 57 is provided at the back side of the oil pickup 45
so as to extend in the radial direction of the driving shaft 15 and
penetrates through the oil supply path 41. The holder 58 described
above is press-fitted into the lateral hole 57. The oil pickup 45
is press-fitted into the driving shaft 15 after the rotor 39 is
magnetized.
[0030] The oil pickup 45 has a suction port 42 provided to the
lower end thereof, and a paddle 44 formed above the suction port
42. The lower end of the oil pickup 45 is immersed in lubrication
oil pooled in the oil pool 40, and the suction port 42 of the oil
supply path 41 is opened in the lubrication oil. When the driving
shaft 15 rotates, the lubrication oil pooled in the oil pool 40
enters the oil supply path 41 from the suction port 42 of the oil
pickup 45, and is pumped up along the paddle 44 of the oil supply
path 41. The thus-pumped lubrication oil is passed through the oil
supply path 41, and supplied to the respective sliding portions of
the scroll compression mechanism 11 such as the radial bearing
portion 28, the slewing bearing 24, etc. Furthermore, the
lubrication oil is supplied through the oil supply path 41 to the
oil chamber 43 at the back side of the swing scroll 25, and
supplied from the oil chamber 43 through an intercommunication path
51 provided to the swing scroll 25 to the compression chamber
35.
[0031] The main frame 21 penetrates radially from the boss mount
portion 26 through the main frame 21 to form a return oil path 47
opened to the vertical groove 71. Excessive lubrication oil out of
the lubrication oil supplied through the oil supply path 41 to the
respective sliding portions of the scroll compression mechanism 11
and the compression chamber 35 is passed through the return oil
path 47 and returned to the oil pool 40. An oil collector 46 is
provided below the return oil path 47, and the oil collector 46
extends to the neighborhood of the upper end of the spacer ring 38.
Plural notches 54 are formed on the outer peripheral surface of the
stator 37 so as to extend between the upper and lower sides of the
stator 37. The lubrication oil returned from the oil supply path 41
through the return oil path 47 and the oil collector 46 is passed
through the gap between the notches 54 and the gap between the
respective arm portions 8B and returned to the oil pool 40. In the
cross-sectional view of FIG. 1, the discharge pipe 33 is
represented by broken lines for the purpose of simplification of
description, but the discharge pipe 33 is disposed to be displaced
in phase from the oil collector 46.
[0032] The fixed scroll 23 comprises an end plate 23A and a spiral
(involute type) lap 23B formed on the lower surface of the end
plate 23A. The swing scroll 25 comprises an end plate 25A and a
spiral (involute type) lap 23B formed on the upper surface of the
end plate 25A. The lap 23B of the fixed scroll 23 and the lap 25B
of the swing scroll 25 are engaged with each other, whereby plural
compression chambers 35 are formed between the fixed scroll 23 and
the swing scroll 25 by both the laps 23B, 25B.
[0033] The swing scroll 25 is supported by the fixed scroll 23
through an Oldham's ring 61, and a cylindrical boss 25C having a
bottom is provided to the center portion of the lower surface of
the end plate 25A so as to protrude from the center portion.
Furthermore, the eccentric shaft portion 15A is provided to the
upper end of the driving shaft 15, and the eccentric shaft portion
15A is rotatably fitted in the swing scroll 25.
[0034] Furthermore, a counter weight portion (upper balancer) 63 is
provided to the driving shaft 15 to be located at the lower side of
the main frame 21, and a lower balancer 77 is provided to the lower
portion of the rotor 39. The driving shaft 15 keeps dynamic balance
with the swing scroll 25, the eccentric shaft portion 15A, etc. by
the upper balancer 63 and the lower balancer 77. The driving shaft
15 rotates with keeping the weight balance by the counter weight
portion 63 and the lower balancer 73, whereby the swing scroll 25
makes an orbital motion. In connection with the orbital motion of
the swing scroll 25, the volume between both the laps 23B and 25B
is contracted to the center, whereby the compressor chamber 35
compresses the refrigerant sucked through the suction pipe 31.
Furthermore, a regulation plate 55 which is swaged integrally with
the rotor 39 and the lower balancer 77 is provided to the lower
surface of the lower balancer 77. The regulation plate 55 will be
described in detail later, and is used to regulate the rotation of
the rotor 39 when the winding magnetization of the rotor 39 is
performed.
[0035] A cup 48 is fixed to the lower side of the main frame 21 by
a bolt 49 so as to surround the periphery of the counterweight
portion 63. The cup 48 prevents the lubrication oil leaking from
the clearance between the main frame 21 and the driving shaft 15
from scattering to the discharge pipe side due to rotation of the
counterweight portion 63.
[0036] A discharge hole 73 is provided to the center portion of the
fixed scroll 23, and gas refrigerant discharging from the discharge
hole 73 passes through a discharge valve 75, discharges to the
discharge space 29, and then flows out through the vertical grooves
71 provided on the outer peripheries of the main frame 21 and the
fixed scroll 23 to the high-pressure space 27 below the main frame
21. This high-pressure refrigerant is discharged to the outside of
the casing 3 through the discharge pipe 33 provided to the casing
main body 5.
[0037] The driving operation of the scroll compression device 1
will be described.
[0038] When the driving motor 13 is actuated, the rotor 39 rotates
with respect to the stator 37 and thus the swing scroll 25 of the
scroll compression mechanism 11 makes only an orbital motion around
the fixed scroll 23 without making autorotation. Accordingly,
low-pressure refrigerant is passed through the suction pipe 31 and
sucked from the peripheral edge side of the compression chamber 35
into the compression chamber 35. This refrigerant is compressed due
to the volumetric change of the compression chamber 35, and this
compressed refrigerant is set to a high-pressure state and
discharged from the compression chamber 35 through the discharge
valve 75 to the discharge space 29, and then flows out through the
vertical grooves 71 provided on the respective outer peripheries of
the main frame 21 and the fixed scroll 23 to the high-pressure
space 27 below the main frame 21. This high-pressure refrigerant is
discharged to the outside of the casing 3 through the discharge
pipe 33 provided to the casing main body 5. The refrigerant
discharged to the outside of the casing 3 is circulated in the
refrigerant circuit (not shown), sucked through the suction pipe 31
and compressed again. The circulation of the refrigerant described
above is repeated.
[0039] The flow of the lubrication oil will be described. The
lubrication oil pooled at the inner bottom portion of the lower cap
9 in the casing 3 is sucked up by the oil pickup 45, passed through
the oil supply path 41 and supplied to the respective sliding
portions of the scroll compression mechanism 11 and the compression
chamber 35. The excessive lubrication oil in the respective sliding
portions of the scroll compression mechanism 11 and the compression
chamber 35 is collected from the return oil path 47 to the oil
collector 46, passed through the notches 54 provided on the outer
periphery of the stator 37, and then returned to the lower side of
the driving motor 13.
[0040] Next, a method of magnetizing the scroll compression device
1 will be described.
[0041] FIG. 3 is a cross-sectional view showing the scroll
compression device 1 in a magnetization step of magnetizing the
rotor 39, and FIG. 4 is a diagram showing the inside of the scroll
compression device 1 which is viewed from the upper side of FIG.
3.
[0042] When the rotor 39 is magnetized, the scroll compression
device 1 is disposed to be turned upside down as shown in FIG. 3
before the lower cap 9 and the oil pickup 45 are secured to the
scroll compression device 1. A vertical cavity 22 in which the oil
pickup 45 is press-fitted is formed in the driving shaft 15. The
vertical cavity 22 penetrates through the lower portion 15B of the
driving shaft 15 to be opened to the outside. The vertical cavity
22 is formed integrally with the oil supply path 41 at the lower
portion 15B of the driving shaft 15.
[0043] When the rotor 39 is magnetized, a rotating jig 10 is first
inserted through the vertical hole 22 into the oil supply path 41
formed in the driving shaft 15. A recess portion 10B is formed at
the tip 10A of the rotating jig 10, and the recess portion 58 is
locked to a holder 58 extending in the radial direction in the oil
supply path 41. When the rotating jig 10 is rotated under the state
that the recess portion 10B of the rotating jig 10 is locked to the
holder 58, the driving shaft 15 is rotated along with the rotation
of the rotating jig 10, whereby the rotor 39 is rotated. The
driving shaft 15 is rotated by a predetermined angle through the
rotating jig 10. According to this construction, after the driving
shaft 15 is supported in the casing main body 5 by the bearing
plate 8, the rotating jig 10 is locked to the holder 58 formed in
the oil supply path 41, whereby the rotor 39 can be rotated.
[0044] Subsequently, a rotation regulating jig 76 is inserted into
the casing main body 5 through the opening portions 8E of the
bearing plate 8 as shown in FIG. 4. The rotation regulating jig 76
has a pair of pawl portions 76A, 76A provided at symmetrical
positions. Plural lock groove portions 55A are provided on the
outer periphery of the regulation plate 55, and the pawl portions
76A, 76A of the rotation regulating jig 76 are locked to the lock
groove portions 55A. The inner dimension S1 of the lock groove
portions 55A is set to be larger than the inner dimension S2 of the
opening portions 8E. Accordingly, after the driving shaft 15 is
supported in the casing main body 5 by the bearing plate 8, the
rotation regulating jig 76 can be inserted into the casing main
body 5 through the opening portions 8E.
[0045] The driving shaft 15 is rotated by a predetermined angle and
stopped by operating the rotating jig 10, the rotation regulating
jig 76 is locked to the lock groove portions 55A of the regulation
plate 55, and current is passed through the stator windings
constituting the stator coil 18 of the stator 37 of the driving
motor 13 to generate magnetic field inside the stator core 37A,
whereby the rotor 39 is magnetized. At this time, reaction force
which is repulsive to magnetic force occurs in the rotor 39, and
the rotor 39 is about to rotate due to this reaction force.
However, the rotation of the regulation plate 55 is regulated by
the rotation regulating jig 76, so that the rotation of the rotor
39 under magnetization is suppressed. After a voltage is applied to
the stator windings of the stator coil 18, the driving shaft 15 is
rotated by a predetermined angle and then stopped by the rotation
jig 10 again. The rotation regulating jig 76 is locked to the
regulation plate 55, and then a voltage is applied while the
polarity thereof is inverted from that of the previously applied
voltage. This operation is repeated at plural times. The rotor 39
is magnetized with being angularly shifted while varying the phase.
The rotation angle of the rotor 39 may be arbitrarily set in
accordance with the specification of the driving motor 13.
[0046] After the rotor 39 is magnetized, a flux check is executed
in such a manner that variation of magnetic flux of the rotor 39 is
measured by a flux meter (not shown) while the rotor 39 is rotated
by the rotating jig 10 and the magnetization state of the rotor 39
is checked from a waveform representing the variation of the
magnetic flux measured by the flux meter. Thereafter, the annular
plate 59 provided with the baffle plate 14 is fixed to the bearing
plate 8 to cover the opening portions 8E. The oil pickup 45 is
press-fitted into the driving shaft 15 to be joined to the oil
supply path 41, the lower cap 9 is secured, and the casing main
body 5 in which the scroll compression mechanism 11 and the driving
motor 13 are supported is returned to a normal position. The upper
cap 7 may be configured to cover the upper opening of the casing
main body 5 afterwards.
[0047] As described above, according to the embodiment to which the
present invention is applied, the scroll compression mechanism 11
for compressing refrigerant and the driving motor 13 which is
connected to the scroll compression mechanism 11 through the
driving shaft 15 to drive the scroll compression mechanism 11 are
accommodated in the casing 3, the scroll compression mechanism 11
is supported in the casing 3 by the main frame 21, the rotor 39 of
the driving motor 13 is connected to the driving shaft 15, the
driving shaft 15 is supported in the casing 3 by the bearing plate
8, the pickup 45 is connected to the oil supply path 41 extending
in the up-and-down direction in the driving shaft 15, and the
holder 58 extending in the radial direction is provided in the oil
supply path 41 at the back side of the pickup 45. Therefore, before
the pickup 45 is connected to the oil supply path 41, the driving
shaft 15 can be rotated by using the holder 58 extending in the
radial direction in the oil supply path 41. Accordingly, with
respect to even the scroll compressor in which the bearing plate 8
for supporting the driving shaft 15 in the casing 3 and the main
frame 21 are provided at the upper and lower sides of the driving
motor 13, the driving shaft 15 and the rotor 39 connected to the
driving shaft 15 can be easily rotated by merely locking the
rotating jig 10 to the holder 58 and rotating the rotating jig 10,
so that the positioning of the rotor 39 under the magnetization and
the check after the magnetization can be easily performed.
Therefore, the working efficiency of the magnetization of the
windings can be improved.
[0048] Furthermore, according to the embodiment to which the
present invention is applied, the holder 58 is a pin member
penetrating through the oil supply path 41. Therefore, the lateral
hole 57 is formed in the driving shaft 15, and the holder 58 can be
easily secured by press-fitting the holder 58 from this lateral
hole 57. Furthermore, the holder 58 is configured to remain in the
oil supply path 41 of a product. However, the holder 58 does not
hinder flow of lubrication oil which is passed through the oil
supply path 41 and pumped up.
[0049] Still furthermore, according to the embodiment to which the
present invention is applied, the lower balancer 77 is provided to
the lower portion of the rotor 39 of the driving motor 13, the
regulation plate 55 for regulating the rotation of the rotor 39 is
provided to the lower surface of the lower balancer 77, and the
plural lock groove portions 55A are provided on the outer periphery
of the regulation plate 55. Therefore, the driving shaft 15 rotates
with keeping the dynamic balance with the swing scroll 25, the
eccentric shaft portion 15A, etc. while keeping the weight balance
with the upper balancer 63 by the lower balancer 77, whereby the
swing scroll 25 is enabled to make an orbital motion without
rotating on its own axis. Furthermore, the rotation regulating jig
76 is locked to the lock groove portions 55A provided to the
regulating plate 55 which is provided to the lower surface of the
lower balancer 77, and the rotor can be prevented from being
rotated by the reaction force to the magnetic force, so that the
working efficiency of the magnetization of windings can be
enhanced.
[0050] Still furthermore, according to the embodiment to which the
present invention is applied, the bearing plate 8 has the plural
opening portions 8E through which the upper and lower spaces
intercommunicate with each other, and the inner dimension S1 of the
plural lock groove portions 55A of the regulation plate 55 is set
to be larger than the inner dimension S2 of the plural opening
portions 8E. Therefore, the rotation regulating jig 76 can be
locked to the lock groove portions 55A by inserting the rotation
regulating jig 76 into the casing 3 through the opening portions
8E, and the rotation of the rotor 39 under magnetization can be
easily rotated. Accordingly, the working efficiency of the
magnetization of windings can be enhanced.
[0051] Still furthermore, according to the embodiment to which the
present invention is applied, the driving motor 13 is the DC
driving motor which is driven to be controlled in rotation torque
by the PWM inverter. Therefore, the driving motor 13 can be
miniaturized by using a DC motor having a high output efficiency.
Furthermore, occurrence of needless heat caused by
increase/decrease of the voltage of the driving motor 13 can be
prevented by driving the driving motor 13 with the inverter,
whereby the operation efficiency can be enhanced.
[0052] Still furthermore, according to the embodiment to which the
present invention is applied, the pickup 4 is detached, the
rotating jig 10 is inserted in the oil supply path 41, and the
operation of rotating the driving shaft 15 by a predetermined angle
and then stopping through the operation of the rotating jig 10,
applying the voltage to the windings of the driving shaft 13,
rotating the driving shaft 15 by a predetermined angle and then
stopping the driving shaft 15 again, and applying the voltage is
repeated to magnetize the rotor. Therefore, even in the scroll
compressor in which the bearing plate 8 for supporting the driving
shaft 15 in the casing 3 and the main frame 21 are provided at the
upper and lower sides of the driving motor 13, the driving shaft 15
and the rotor 39 connected to the driving shaft 15 can be easily
rotated by merely locking the rotating jig 10 to the holder 58 and
rotating the rotating jig 10, so that the positioning under the
magnetization of the rotor 39 and the check after the magnetization
can be easily performed. Furthermore, the magnetization of forming
plural poles on the rotor 39 can be easily performed.
[0053] Still furthermore, according to the embodiment to which the
present invention is applied, the rotating jig 10 is inserted in
the oil supply path 41, the tip 10A of the rotating jig 10 is
locked to the holder 58, and the operation of rotating the driving
shaft 15 by a predetermined angle and then stopping the driving
shaft 15 through the operation of the rotating jig 10, applying the
voltage to the windings of the driving motor 13, rotating the
driving shaft 15 by a predetermined angle and then stopping the
driving shaft again, and applying the voltage is repeated to
magnetize the rotor 39 before the pickup 45 is secured. In
addition, the rotation regulating jig 76 is locked to the plural
lock groove portions 55A provided on the outer periphery of the
regulation plate 55, and the rotation of the rotor 39 under the
magnetization is regulated by the rotation regulating jig 76.
Therefore, the rotation regulating jig 76 is locked to the lock
groove portions 55A provided to the regulation plate 55, whereby
the rotor can be prevented from being rotated with the reaction
force to the magnetic force under the magnetization of the rotor
39, and the working efficiency of the magnetization of the windings
can be enhanced.
DESCRIPTION OF REFERENCE NUMERALS
[0054] 1 scroll compression device [0055] 3 casing [0056] 8 bearing
plate [0057] 8E opening portion [0058] 10 rotating jig [0059] 11
scroll compression mechanism [0060] 13 driving motor (DC driving
motor) [0061] 15 driving shaft [0062] 21 main frame [0063] 37
stator [0064] 39 rotor [0065] 41 oil supply path [0066] 45 pickup
(oil pickup) [0067] 55 regulation plate [0068] 55A lock groove
portion [0069] 58 holder [0070] 63 upper balancer [0071] 76
rotation regulating jig
* * * * *