U.S. patent application number 11/238105 was filed with the patent office on 2006-04-06 for compressor.
Invention is credited to Kazuya Sato.
Application Number | 20060073034 11/238105 |
Document ID | / |
Family ID | 35447415 |
Filed Date | 2006-04-06 |
United States Patent
Application |
20060073034 |
Kind Code |
A1 |
Sato; Kazuya |
April 6, 2006 |
Compressor
Abstract
A compressor is provided which enables easy installation of the
filter even when any refrigerant suction passage cannot be provided
on a cylinder side of a compression element or even when any long
suction passage cannot be provided. The compressor comprises, in a
sealed container 12, a drive element 14, a rotary compression
mechanism 18 including first and second rotary compression elements
32 and 34, an upper support member 54 and a lower support member 56
for journaling a rotary shaft 16. The upper support member 54 and
the lower support member 56 are provided with suction passages 58
and 60 for communicating with the interior of upper and lower
cylinders 38 and 40 at suction ports 161 and 162, respectively, and
recessed noise eliminating chambers 62 and 64. Filter installation
portions 180 and 182 which are recessed are provided to surround
and enclose open ends of the suction passages 58 and 60. Filters
184 and 186 are inserted into and installed on the filter
installation portions 180 and 182, respectively, and the filter 184
is pressed against and stopped by the upper surface of the upper
cylinder 38, while the filter 186 is pressed against and stopped by
the lower surface of the lower cylinder 40.
Inventors: |
Sato; Kazuya; (Gunma-ken,
JP) |
Correspondence
Address: |
WEINGARTEN, SCHURGIN, GAGNEBIN & LEBOVICI LLP
TEN POST OFFICE SQUARE
BOSTON
MA
02109
US
|
Family ID: |
35447415 |
Appl. No.: |
11/238105 |
Filed: |
September 28, 2005 |
Current U.S.
Class: |
417/410.3 ;
417/410.1 |
Current CPC
Class: |
F04C 23/001 20130101;
F01C 21/108 20130101; F04C 2230/60 20130101; F04C 18/0207 20130101;
F04C 23/008 20130101; F04C 29/0092 20130101; F04C 18/3564 20130101;
F01C 21/106 20130101 |
Class at
Publication: |
417/410.3 ;
417/410.1 |
International
Class: |
F04B 35/04 20060101
F04B035/04; F04B 17/00 20060101 F04B017/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 29, 2004 |
JP |
2004-284269 |
Nov 24, 2004 |
JP |
2004-339043 |
Claims
1. A compressor comprising, in a sealed container: a drive element;
a compression element; a drive shaft for transferring a driving
force of the drive element to the compression element to drive said
compression element; and a bearing member for journaling the drive
shaft, wherein refrigerant gas introduced from an outside of the
sealed container is drawn into the compression element via the
bearing member, and then is compressed by the compression element
to be discharged to the outside of the sealed container, and
wherein a filter is fitted into a recess provided at an outlet of a
suction passage of the bearing member, the suction passage leading
to a suction port of a cylinder constituting the compression
element, said filter being pressed against and stopped by the
cylinder.
2. A compressor comprising, in a sealed container: a drive element;
a compression element; a drive shaft for transferring a driving
force of the drive element to the compression element to drive said
compression element; and a bearing member for journaling the drive
shaft, wherein refrigerant gas introduced from an outside of the
sealed container is drawn into the compression element via a
refrigerant introduction pipe, and then is compressed by the
compression element to be discharged to the outside of the sealed
container, and wherein a plate-like filter is holded and fixed
between the compression element and the refrigerant introduction
pipe on an outlet side of the refrigerant introduction pipe.
3. A refrigerating cycle using the compressor according to claim
1.
4. A refrigerating cycle using the compressor according to claim 2.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a compressor for
compressing a refrigerant suitable for use in, for example, an air
conditioning system, a water heater, a car air conditioner, a
showcase, a freezer and refrigerator, or a refrigeration unit such
as an automatic dispenser.
[0003] 2. Description of the Related Art
[0004] In such a conventional compressor, for example, in a
multistage compression type rotary compressor of an inside
high-pressure type as disclosed in, for example, JP-A-2004-19599,
refrigerant gas is drawn into a low pressure chamber side of a
cylinder from a refrigerant introduction pipe via a suction port of
a first rotary compression element. The refrigerant gas is then
compressed by operations of a roller and a vane to become
intermediate pressure. The intermediate pressure refrigerant gas is
discharged from a high pressure chamber side of the cylinder
through a discharge port, a noise eliminating chamber, and a
refrigerant introduction pipe provided outside a sealed container.
The intermediate pressure refrigerant gas is then drawn into the
lower pressure chamber side of the cylinder through a suction port
of a second rotary compression element, where it is subjected to a
second stage compression by the operations of the roller and the
vane to become high-temperature and high-pressure refrigerant
gas.
[0005] The high-temperature and high-pressure refrigerant gas
compressed by the second rotary compression element flows from the
high pressure chamber side of the cylinder into the sealed
container through the discharge port and the noise eliminating
chamber. Then, the high-temperature and high-pressure refrigerant
gas discharged into the sealed container is discharged from a
refrigerant discharge pipe to the outside of the sealed container
to be supplied to a refrigerating cycle, such as an air
conditioning system, where the refrigerant gas radiates heat and is
condensed to enter an evaporator, in which heat of the refrigerant
is absorbed and the refrigerant gas is evaporated. Thereafter it is
drawn again into the first rotary compression element through the
refrigerant introduction pipe. This cycle is repeated.
[0006] As a sealed-type electric compressor with such an
arrangement, a rotary compressor 10.times. is well known, as shown
in FIGS. 6 and 7, which includes a filter 185 press fitted into an
inlet side of a suction passage 59 for the refrigerant provided in
a cylinder 39 constituting the rotary compression element, so as to
prevent foreign material from flowing into a compression chamber
not shown of the cylinder 39, and to avoid inconveniences,
including wear or locking of sliding parts of the rotary
compression element.
[0007] That is, in the conventional sealed-type electric
compressor, the filter 185 is installed over a tip end of a
refrigerant introduction pipe 93 which is inserted into and
connected to the refrigerant suction passage 59 provided in the
cylinder 39, and then is press fitted into the inlet side of the
suction passage 59, thereby removing foreign material which intends
to be drawn into the compression chamber of the cylinder 39
together with the refrigerant gas.
[0008] This method of installation of the filter suffers from the
problem that the filter cannot be often installed when the
refrigerant suction passage cannot be provided in the cylinder
constituting the compression element, or when a long refrigerant
suction passage cannot be provided.
SUMMARY OF THE INVENTION
[0009] Accordingly, the invention has an object to provide a
compressor which enables easy installation of a filter even when
any refrigerant suction passage cannot be provided on a cylinder
side of a compression element or even when any long suction passage
cannot be provided.
[0010] According to a first aspect of the invention, there is
provided a compressor which comprises, in a sealed container, a
drive element, a compression element, a drive shaft for
transferring a driving force of the drive element to the
compression element to drive the compression element, and a bearing
member for journaling the drive shaft. Refrigerant gas introduced
from an outside of the sealed container is drawn into the
compression element via the bearing member, and then the
refrigerant gas is compressed by the compression element to be
discharged to the outside of the sealed container. A filter is
fitted into a recess provided at an outlet of a refrigerant passage
of the bearing member, the refrigerant passage leading to a suction
port of a cylinder constituting the compression element, and the
filter is pressed against and stopped by the cylinder.
[0011] According to a second aspect of the invention, there is
provided a compressor which comprises, in a sealed container, a
drive element, a compression element, a drive shaft for
transferring a driving force of the drive element to the
compression element to drive the compression element, and a bearing
member for journaling the drive shaft. Refrigerant gas introduced
from an outside of the sealed container is drawn into the
compression element via a refrigerant introduction pipe, and then
the refrigerant gas is compressed by the compression element to be
discharged to the outside of the sealed container. A plate-like
filter is holded and fixed between the compression element and the
refrigerant introduction pipe on an outlet side of the refrigerant
introduction pipe.
[0012] In the first aspect of the invention, the filter is fitted
into the recess provided at the outlet of the refrigerant passage
of the bearing member, which passage leads to the suction port of
the cylinder constituting the compression element, and the filter
is pressed against and stopped by the cylinder. This enables easy
installation of the filter even when any refrigerant suction
passage cannot be provided on the cylinder side or even when any
long suction passage cannot be provided. Accordingly, this can
surely avoid the occurrence of inconveniences, including wear or
locking of sliding parts of the rotary compression element.
[0013] In the second aspect of the invention, since the plate-like
filter is holded and fixed between the compression element and the
refrigerant introduction pipe on the outlet side of the refrigerant
introduction pipe, the filter can be easily installed on the
compressor even when any suction passage cannot be provided on the
cylinder side or even when any long suction passage cannot be
provided. This can surely avoid the occurrence of inconveniences,
including the wear or locking of sliding parts of the rotary
compression element.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a schematic longitudinal sectional view showing an
inside high-pressure type two-stage rotary compressor according to
a first preferred embodiment of the invention;
[0015] FIG. 2 is a plan view of a filter used in the compressor of
the embodiment;
[0016] FIG. 3 is a side sectional view of the filter used in the
compressor of the embodiment;
[0017] FIG. 4 is a schematic longitudinal sectional view showing an
inside high-pressure type two-stage rotary compressor according to
a second preferred embodiment of the invention;
[0018] FIG. 5 is an enlarged view of a principal part on which the
filter of the second embodiment is installed;
[0019] FIG. 6 is a diagram explaining a part of a conventional
compressor with a filter installed thereon; and
[0020] FIG. 7 is a diagram explaining the filter which is installed
over a refrigerant introduction pipe of the conventional
compressor.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0021] A compressor according to a first preferred embodiment of
the invention comprises, in a sealed container, a drive element, a
compression element, a drive shaft for transferring a driving force
of the drive element to the compression element to drive the
compression element, and a bearing member for journaling the drive
shaft. Refrigerant gas introduced from an outside of the sealed
container is drawn into the compression element via the bearing
member, and then is compressed by the compression element to be
discharged to the outside of the sealed container. A filter
installation portion is formed as a recess for surrounding and
enclosing an outlet of a refrigerant passage of the bearing member
leading to a suction port of a cylinder constituting the
compression element. A filter which includes a wire-mesh filtration
part supported by a metallic doughnut-shaped support member is
fitted into the filter installation portion, and then is pressed
against and stopped by the cylinder.
[0022] A compressor according to a second preferred embodiment of
the invention comprises, in a sealed container, a drive element, a
compression element, a drive shaft for transferring a driving force
of the drive element to the compression element to drive the
compression element, and a bearing member for journaling the drive
shaft. Refrigerant gas introduced from an outside of the sealed
container is drawn into the compression element via a refrigerant
introduction pipe, and then is compressed by the compression
element to be discharged to the outside of the sealed container. A
plate-like filter which includes a wire-mesh filtration part
supported by a metallic doughnut-shaped support member is holded
and fixed between the compression element and the refrigerant
introduction pipe on an outlet side of the refrigerant introduction
pipe.
First Preferred Embodiment
[0023] The first preferred embodiment of the invention will be
described below in detail with reference to FIGS. 1 to 3.
[0024] FIG. 1 is a longitudinal sectional view showing a multistage
(two-stage) compression type rotary compressor of an inside
high-pressure type 10 which includes first and second rotary
compression elements 32 and 34 according to the first embodiment.
FIG. 2 is a plain view of a filter of the embodiment, and FIG. 3 is
a sectional view of the filter of the embodiment. For simple
understanding, in FIGS. 1 to 3, elements that have the same
functions as those explained in FIGS. 6 and 7 are given the same
reference numerals.
[0025] Referring to FIG. 1, the multistage (two-stage) compression
type rotary compressor of the inside high-pressure type 10 is
designed to compress a carbon dioxide (CO.sub.2) which is to be
used as a refrigerant for an air conditioning system. The rotary
compressor 10 comprises a cylindrical sealed container 12 made of a
steel plate, a drive element 14 disposed at and accommodated in an
upper side of an inner space of the sealed container 12, and a
rotary compression mechanism 18 composed of the first rotary
compression element 32 (first stage) and the second rotary
compression element 34 (second stage) which are respectively
disposed under the drive element 14 and driven by a rotary shaft 16
of the drive element 14.
[0026] The sealed container 12 has its bottom serving as an oil
reservoir, and includes a container body 12A for accommodating
therein the drive element 14 and the rotary compression mechanism
18, and an end cap (cover) 12B with a substantially bowl shape for
closing an opening positioned at an upper part of the container
body 12A. A terminal 20 (wiring of which is omitted in description)
for supplying power to the drive element 14 is attached to the
center of the end cap 12B.
[0027] The drive element 14 includes a stator 22 which is annularly
attached to the inner peripheral surface of the sealed container 12
in the upper space thereof, and a rotor 24 inserted into and
installed inside the stator 22 with a slight clearance. The rotary
shaft 16 extending vertically through the center of the stator 22
is fixed to the rotor 24.
[0028] The stator 22 includes a laminated body 26 formed by
laminating doughnut-shaped electromagnetic steel plates and a
stator coil 28 which is wound around the teeth of the laminated
body 26 by direct winding (concentrating winding). The rotor 24 is
formed by inserting a permanent magnet MG in a laminated body 30
made of electromagnetic steel plates like the stator 22.
[0029] An intermediate partition plate 36 is held between the first
rotary compression element 32 and the second rotary compression
element 34. That is, both the first rotary compression element 32
and the second rotary compression element 34 comprise the
intermediate partition plate 36, upper and lower cylinders 38, 40
disposed over and under the intermediate partition plate 36, upper
and lower eccentric portions 42, 44 provided on the rotary shaft
16, upper and lower rollers 46, 48 which are eccentrically rotated
inside the upper and lower cylinders 38, 40 while fitted into the
upper and lower eccentric portions 42, 44 with a 180-degree phase
difference therebetween, upper and lower vanes (not shown) abutting
against the upper and lower rollers 46, 48 and partitioning each of
the upper and lower cylinders 38, 40 into a lower pressure chamber
side and a high pressure chamber side, and an upper support member
54 and a lower support member 56 serving both as supporting means
by closing an upper opening face of the upper cylinder 38 and the
lower opening face of the lower cylinder 40, and as bearing means
of the rotary shaft 16.
[0030] There are provided in the upper support member 54 and lower
support member 56, suction passages 58, 60 which communicate with
the inside of the upper and lower cylinders 38 and 40 through
suction ports 161, 162, and noise eliminating chambers 62, 64 which
are recessed. Filter installation portions 180, 182 are formed as
recesses for surrounding and enclosing open ends of the suction
passages 58 and 60, into which portions filters 184, 186 are
inserted, respectively. The filter 184 as used herein is a
plate-like filter composed of a wire-mesh filtration part 184A
supported by a metallic doughnut-shaped frame 184B, as shown in,
for example, FIGS. 2 and 3 (filter 186 has the same structure). The
frame 184B of the filter 184 is pressed against and stopped by the
upper surface of the upper cylinder 38, while a frame 186B of the
filter 186 is pressed against and stopped by the lower surface of
the lower cylinder 40 such that the filters 184, 186 are not
disconnected from the filter installation portions 180, 182. Thus,
the filter 184 is held between the upper support member 54 and the
upper cylinder 38, and the filter 186 is held between the lower
support member 56 and the lower cylinder 40, so that the filters
are prevented from dropping off.
[0031] The noise eliminating chambers 62, 64 of the upper support
member 54 and the lower support member 56 have openings thereof
opposite to the upper and lower cylinders 38, 40 closed with
respective covers. That is, the noise eliminating chamber 62 is
blocked by an upper cover 66, and the noise eliminating chamber 64
is blocked by a lower cover 68.
[0032] The upper cover 66 has its periphery fixed to the upper
support member 54 from above by four main bolts 78. Two of the main
bolts 78 have tip ends thereof screw-engaged with the upper
cylinder, and the other two have tip ends thereof screw-engaged
with the lower support member 56. Above the upper cover 66 is
positioned the drive element 14.
[0033] The noise eliminating chamber 62 of the upper support member
54 and the interior of the sealed container 12 communicate with
each other through a discharge hole 120 which is open towards the
drive element 14 in the sealed container 12, penetrating the upper
cover 66. Thus, refrigerant gas compressed by the second rotary
compression element 34 is discharged into the sealed container 12
through the discharge hole 120.
[0034] The lower cover 68 is made of a doughnut-shaped circular
steel plate, and it is fixed to the lower support member 56 from
below by screwing four main bolts 129 at four spots on the
periphery thereof to block an opening disposed on the lower surface
of the noise eliminating chamber 64. The tip end of each main bolt
129 is screw-engaged with the upper support member 54.
[0035] Sleeves 141, 142, 143, and 144 are respectively fixed to the
side surface of the container body 12A of the sealed container 12
by performing projection welding at open positions corresponding to
the suction passages 58, 60 of the upper and lower support members
54, 56, the noise eliminating chamber 64, and the portion above the
rotor 24 (portion directly above the drive element 14).
[0036] The sleeve 141 is vertically adjacent to the sleeve 142. The
sleeve 142 is positioned substantially opposite to the sleeve 143
with respect to the rotary shaft 16. The sleeve 141 is displaced
from the sleeve 144 by about 90 degrees with respect to the rotary
shaft 16.
[0037] One end of a refrigerant introduction pipe 92 is inserted
into and connected to the sleeve 141 to communicate with the
suction passage 58 of the upper support member 54. The other end of
the refrigerant introduction pipe 92 passes through the upper part
of the sealed container 12, and is inserted into and connected to
the sleeve 143 to communicate with the noise eliminating chamber 64
of the lower support member 56. A refrigerant introduction pipe 94
is inserted into and connected to the sleeve 142 to communicate
with the suction passage 60 of the lower support member 56. A
refrigerant discharge pipe not shown is inserted into and connected
to the sleeve 144.
[0038] In the rotary compressor 10, carbon dioxide (CO.sub.2) which
is natural refrigerant is used as a refrigerant considering earth
consciousness, inflammability, toxicity or the like, and an
existing oil such as mineral oil, polyalkyleneglycol (PAG),
alkylbenzene oil, ether oil, ester oil, or the like is used as the
oil of the lubricant.
[0039] In the rotary compressor 10 of the embodiments described
above, when a stator coil 28 of the drive element 14 is energized
via the terminal 20 and the wiring not shown, the drive element 14
is operated to rotate the rotor 24. Once the rotor 24 is rotated,
the upper and lower rollers 46, 48 engaged with the upper and lower
eccentric portions 42, 44 which are integrally provided with the
rotary shaft 16 are caused to rotate eccentrically in the upper and
lower cylinders 38, 40, as described above.
[0040] As a result, a lower pressure (about 4 MPaG) refrigerant gas
supplied via a refrigerant introduction pipe 94 is drawn into the
low pressure chamber side of the lower cylinder 40 from a suction
port 162 via the suction passage 60 provided in the lower support
member 56. Then, the refrigerant gas is compressed by the
operations of the roller 48 and the vane not shown of the first
rotary compression element 32 to be changed into intermediate
pressure (about 8 MPaG). Consequently, the intermediate pressure
refrigerant is discharged into the noise eliminating chamber 64
from the high pressure chamber side of the cylinder 40 via the
discharge port not shown.
[0041] At this time, since the filter 186 is disposed in the filter
installation portion 182, the low pressure refrigerant gas
introduced via the refrigerant introduction pipe 94 is drawn into
the low pressure chamber side of the lower cylinder 40, and then
filtered by the filter 186 to remove the foreign material. This can
avoid the occurrence of inconveniences, including wear or locking
of the sliding parts of the first rotary compression element
32.
[0042] The intermediate-pressure refrigerant discharged into the
noise eliminating chamber 64 is drawn into the refrigerant
introduction pipe 92, passes over the suction passage 58 of the
upper support member 54 via the outside of the sealed container 12,
and then is drawn into the low pressure chamber side of the upper
cylinder 38 from the suction port 161. Also, at this time, the
refrigerant is filtered by the filter 184, thereby removing the
foreign material in the refrigerant drawn into the low pressure
chamber side of the upper cylinder 38. This can avoid the
occurrence of inconveniences, including the wear or locking of the
sliding parts of the second rotary compression element 34. In
addition, the refrigerant gas is cooled when it passes through the
refrigerant introduction pipe 92 provided outside the sealed
container 12.
[0043] The intermediate-pressure refrigerant gas drawn into the low
pressure chamber side of the upper cylinder 38 is compressed by the
operations of the roller 46 and the vane not shown of the second
rotary compression element 34 into high-temperature and
high-pressure (about 10 to 12 MPaG) refrigerant gas, which is then
discharged from the high pressure chamber side of the cylinder 38
into the noise eliminating chamber 62 via the discharge port not
shown.
[0044] The high-temperature and high-pressure refrigerant gas
discharged into the noise eliminating chamber 62 is discharged from
the discharge hole 120 of the upper cover 66 into an area inside
the sealed container 12 under the drive element 14, and then passes
through a clearance between the members to reach the upper side of
the drive element 14, so that the refrigerant gas is discharged to
the outside of the sealed container via the sleeve 144.
[0045] When the rotary compressor 10 is incorporated as, for
example, a compressor for an air conditioner, the high-temperature
and high-pressure refrigerant gas fed through the refrigerant
discharge pipe connected to the sleeve 144 is introduced into a
heat exchanger, so that the heat is radiated and the refrigerant
gas is condensed. The condensed low-temperature and high-pressure
refrigerant liquid is subjected to reduced pressure using an
expansion valve to flow into an evaporator, where it is evaporated,
and then flows back into the compressor through the refrigerant
introduction pipe 94. This cycle is repeated. The latent heat
caused by evaporating the refrigerant in the evaporator produces
the cooling effect.
Second Preferred Embodiment
[0046] Now, the second preferred embodiment of the invention will
be described below in detail with reference to FIGS. 2 to 5.
Elements of the second embodiment that are in common to those in
the first embodiment will be given the same reference numerals, and
explanation thereof will be omitted below.
[0047] In the second embodiment, on the outlet sides of the
refrigerant introduction pipes 92 and 94, the plate-like filter 184
is holded and fixed between the first rotary compression element 32
and the refrigerant introduction pipe 92, and the plate-like filter
186 between the second rotary compression element 34 and the
refrigerant introduction pipe 94.
[0048] FIG. 5 is an enlarged view of the principal part of the
first rotary compression element 32. The second rotary compression
element 34 has the same construction as that of the first rotary
compression element 32, and thus explanation of the second rotary
compression element will also be given simultaneously below.
[0049] In more detail, among the lower support member 56 and the
lower cylinder 40 constituting the first rotary compression element
32, the lower support member 56 is provided with the suction
passage 60 communicating with the interior of the lower cylinder 40
at the suction port 162, and an insertion portion 196 into which a
copper pipe 192 is inserted as an extended pipe of the refrigerant
introduction pipe 94 so as to cause the refrigerant introduction
pipe 94 to communicate with the suction passage 60. Just like the
first rotary compression element 32, in the second rotary
compression element 34, among the upper support member 54 and the
upper cylinder 38, the upper support member 54 is provided with the
suction passage 58 communicating with the interior of the upper
cylinder 38 at the suction port 161, and an insertion portion 194
into which a copper pipe 190 is inserted as an extended pipe of the
refrigerant introduction pipe 92 so as to cause the refrigerant
introduction pipe 92 to communicate with the suction passage 58.
The refrigerant introduction pipes 92, 94 are welded and fixed to
the copper pipes 190, 192, respectively, which are welded and fixed
to the sleeves 141, 142, respectively. A collar 197 is formed of an
iron pipe.
[0050] A filter installation portion 198 formed of a step is
provided between the tip end of each of the copper pipes 190 and
192 and the refrigerant introduction side of each of the suction
passages 58 and 60. The filter installation portion 198, when
insertion portions 194, 196 are formed in the upper and lower
support members 54, 56, is formed by making a lower hole with
substantially the same diameter as that of the filters 184, 186,
and then by making a slightly larger hole with substantially the
same diameter as that of the copper pipes 190, 192. That is, the
filter installation portion 198 is the step formed of a difference
in the diameter between the lower hole and each of the holes for
the upper and lower copper pipes 190, 192. As can be seen from the
above, when the filters 184, 186 are installed on the filter
installation portions 198, the filters 184, 186 are fixed thereto
by pressing the frame 184B, 186B against the copper pipes 190, 192
of the refrigerant introduction pipes 92, 94, respectively.
[0051] It should be noted that although in the embodiments the
insertion portions 194, 196 and the filter installation portion 198
are formed in the upper and lower support members 54, 56, the
invention is not limited thereto. Depending on the construction of
the rotary compressor 10, on the upper and lower cylinders 38, 40
may be formed the filter installation portions 198, in which the
respective filters 184, 186 may be installed to be holded between
the refrigerant introduction pipes 92 and 94.
[0052] Although in the embodiments 1 and 2 as described in detail,
the multistage compression type rotary compressor of the inside
high-pressure type is exemplified as the compressor of the
invention, the invention is not limited thereto. The compressor of
the invention may be useful as a multistage compression type rotary
compressor of an inside intermediate-pressure type, a one-stage
compression type rotary compressor, or a one-stage or multistage
compression type rotary compressor of a scroll type or a
reciprocating type.
* * * * *