Rotary expansible chamber devices – Plural working chambers – Axially spaced working chambers
Reexamination Certificate
2003-03-07
2004-08-10
Vrablik, John J. (Department: 3748)
Rotary expansible chamber devices
Plural working chambers
Axially spaced working chambers
C418S219000, C418SDIG001
Reexamination Certificate
active
06773244
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a compressor having a Z-plate corresponding to a rotary compressor, and particularly, to a discharging part structure of a compressor, in which a fluid compressed in a cylinder is discharged outside the cylinder.
BACKGROUND ART
Generally, a compressor is a device for converting mechanical energy into compression energy of a compression fluid, and a refrigerating compressor is largely classified into a reciprocating compressor, a scroll compressor, a centrifugal compressor, and a rotary compressor by compression methods.
The present applicant has developed a compressor having a Z-plate with a novel concept, which can be classified into the rotary compressor (hereinafter, will be called as ‘Z’-compressor), and filed an application for the invention to the Korean Industrial Patent Office (Application No. 10-1999-42381, Application date: Oct. 1, 1999), which has been disclosed in May 7, 2001 with a Patent Laid-open publication number 2001-35687.
FIGS. 1
,
2
A,
2
B, and
3
illustrate a Z-compressor filed by the present applicant, wherein the Z-compressor includes a motor unit mounted at an inner side of a hermetic container
10
for generating a driving force, and a compression unit mounted at a bottom portion of the motor unit for receiving the driving force and compressing gas.
The motor unit includes a stator S fixed at an inner side of the hermetic container
10
, and a rotator R rotatably engaged to an inner side of the stator S.
Also, the compression unit includes a cylinder assembly D having an inner space V and provided with a suction flow path f
1
and a discharge flow path f
2
connected to the inner space V to be fixed to the hermitic container
10
, and a rotary axis
20
engaged to the motor unit by being inserted to a center of the inner space V of the cylinder assembly D.
The cylinder assembly D includes a cylinder
30
fixed to an inner circumference wall of the hermetic container
10
by being provided with a through hole
31
of a cylindrical shape therein, and upper and lower bearings
40
and
50
respectively engaged to upper and lower portions of the cylinder
30
to form the inner space V with the cylinder
30
and having the rotary axis
20
penetrating therein.
The suction flow path f
1
of the cylinder assembly D is composed of a suction hole formed to be connected to the through hole
31
at an outer circumference of the cylinder
30
. Also, the discharge flow path f
2
of the cylinder assembly D includes an opening
32
penetrated as an axis direction so as to have a predetermined width and a depth at one side of the cylinder
30
, and first and second discharge holes
33
and
34
respectively formed at a frontal wall of the opening
32
of the cylinder
30
to be connected to the through hole
31
.
At this time, the first and second discharge holes
33
and
34
are respectively formed in parallel in an axial direction with a predetermined interval.
A Z-plate
60
is provided to divide the inner space V of the cylinder assembly D into first and second spaces V
1
and V
2
. The Z-plate
60
is formed at the rotary axis
20
as a unit so as to be located at the inner space V of the cylinder assembly D. Also, vanes
70
elastically supported to be always contacted to both sides of the Z-plate
60
and moving for converting the first and second spaces V
1
and V
2
into a suction region and a compression region, respectively, are penetrated to the upper bearing
40
and the lower bearing
50
of the cylinder assembly D, respectively, and engaged thereto.
The vanes
70
are located at upper and lower portions of the Z-plate
60
, that is, they have a same phase when the cylinder assembly D is seen at a horizontal view. At this time, the vanes
70
are respectively inserted to the vane slots
41
and
51
formed in the upper bearing
40
and the lower bearing
50
of the cylinder assembly D.
The Z-plate
60
is formed as a circular shape having a predetermined thickness, and when seen at a lateral side, the Z-plate is composed of an upper convex curved surface portion r
1
having a convex side, a lower concave curved surface portion r
2
having a concave side, and a connection curved surface portion r
3
for connecting the r
1
and r
2
. That is, the Z-plate
60
is a curved surface of a sine wave, wherein the convex curved surface portion r
1
and the concave curved surface portion r
2
are located with an angle of 180° each other.
Also, as shown in
FIGS. 2A and 2B
, an open/close means
80
is engaged to the cylinder assembly D for opening/closing the discharge flow path f
2
and discharging gas compressed in the compression region of the first and second spaces V
1
and V
2
. A suction pipe
90
is engaged to the suction flow path f
1
of the cylinder assembly.
The open/close means
80
includes a first discharge valve
81
engaged to a frontal wall of the cylinder opening
32
of the cylinder assembly D by an engaging bolt B for opening/closing the first discharge hole
33
, and a second discharge valve
82
engaged to a frontal wall of the cylinder opening
32
of the cylinder assembly D by an engaging bolt B for opening/closing the second discharge hole
34
.
Oil is filled at a bottom surface of the hermetic container
10
, an oil flow path
21
is formed at an inner side of the rotary axis
20
, and an oil feeder (not shown) is mounted at an inner side of the oil flow path
21
of the rotary axis
20
(Refer to FIG.
1
).
A reference numeral
100
denotes an elasticity supporting means,
110
denotes a muffler and
99
denotes a discharge pipe.
Operations of the conventional Z-compressor will be explained.
First, if a power is applied to drive the motor unit, the rotary axis
20
rotates by receiving a driving force of the motor unit and the Z-plate
60
of the rotary axis
20
rotates at the inner space V of the cylinder assembly D.
As shown in
FIG. 4
, if an end portion of the convex curved surface portion r
1
of the Z-plate
60
is located at a position a
1
of the vanes
70
corresponding to the first and second spaces V
1
and V
2
, gas compressed in the first space V
1
is discharged to the first discharge hole
33
by an operation of the first discharge valve
81
. If the discharge is completed, suction of the gas into the suction region is completed, gas is sucked to the suction region from the second space V
2
, and gas compression starts at the compression region. At this time, the second discharge hole
34
is closed by the second discharge valve
82
.
Subsequently, the Z-plate
60
rotates, as shown in
FIG. 5
, if an end portion of the concave curved surface portion r
2
of the Z-plate
60
is located at the position a
1
of the vanes
70
corresponding to the first and second spaces V
1
and V
2
, gas is sucked to the suction region from the first space V
1
, and gas compression starts at the compression region under a state that the first discharge hole
33
is closed by the first discharge valve
81
. Then, gas discharge to the second discharge hole
34
in the second space V
2
by opening the second discharge valve
82
is completed and gas suction into the suction region is completed.
That is, whenever the Z-plate
60
rotates one time, gas is sucked, compressed, and discharged in the first and second spaces V
1
and V
2
, which is repeated.
Also, refrigerant gas in high temperature and high pressure discharged through the first and second discharge holes
33
and
34
is exhausted through the cylinder opening
32
of the cylinder assembly D, passes inside of the hermetic container
10
, and discharged at an outer side of the hermetic container
10
.
As the rotary axis
20
rotates, the oil filled at a bottom surface of the hermetic container
10
is fed by an oil feeder engaged to the rotary axis
20
, sucked through the oil flow path
21
of the rotary axis
20
, and supplied to a component in which a sliding takes place. The oil supplied to the component returns to the hermetic container
10
again.
However, in the conventional Z-compressor, as the Z-plate
60
rotates, gas i
Ahn Byung-Ha
Ha Jong-Hun
Kim Young-Jong
Lee Jang-Woo
Shim Jae-Sul
Fleshner & Kim LLP
LG Electronics Inc.
Vrablik John J.
LandOfFree
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