U.S. patent application number 11/213005 was filed with the patent office on 2006-10-05 for fixed scroll of scroll compressor.
This patent application is currently assigned to LG Electronics Inc.. Invention is credited to Jung-won Nam, Byung-kil Yoo.
Application Number | 20060222545 11/213005 |
Document ID | / |
Family ID | 37030062 |
Filed Date | 2006-10-05 |
United States Patent
Application |
20060222545 |
Kind Code |
A1 |
Nam; Jung-won ; et
al. |
October 5, 2006 |
Fixed scroll of scroll compressor
Abstract
Disclosed herein is a scroll compressor, and more particularly,
a fixed scroll of the scroll compressor which can allow part of
gaseous refrigerant to be smoothly introduced into a compression
chamber while preventing introduction of the remaining gaseous
refrigerant that is heated in the compressor. The fixed scroll
includes a scroll body having an involuted wrap to define a
compression chamber therein and provided, around a lower end
thereof, with a mounting flange to be arranged on an upper surface
of a main frame, and an interceptive suction portion configured to
guide part of the gaseous refrigerant, that is directed upward
along the main frame, into the compression chamber while preventing
introduction of the remaining gaseous refrigerant that is
circulated around the scroll body.
Inventors: |
Nam; Jung-won; (Seoul,
KR) ; Yoo; Byung-kil; (Seoul, KR) |
Correspondence
Address: |
JONATHAN Y. KANG, ESQ.;LEE, HONG, DEGERMAN,
KANG & SCHMADEKA, P.C.
801 S. Figueroa Street, 14th Floor
Los Angeles
CA
90017-5554
US
|
Assignee: |
LG Electronics Inc.
|
Family ID: |
37030062 |
Appl. No.: |
11/213005 |
Filed: |
August 26, 2005 |
Current U.S.
Class: |
418/55.1 |
Current CPC
Class: |
F04C 2250/101 20130101;
F04C 18/0253 20130101; F04C 23/008 20130101 |
Class at
Publication: |
418/055.1 |
International
Class: |
F01C 1/02 20060101
F01C001/02; F04C 2/00 20060101 F04C002/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 30, 2005 |
KR |
10-2005-0026583 |
Claims
1. A fixed scroll of a scroll compressor comprising: a scroll body
having an involuted wrap to define a compression chamber therein; a
mounting flange formed along an outer circumference of a lower end
of the scroll body; and an interceptive suction portion formed at
one side of the mounting flange and adapted to guide gaseous
refrigerant, that is directed upward along a main frame, into the
compression chamber.
2. The fixed scroll as set forth in claim 1, wherein the
interceptive suction portion includes a barrier and a suction
passage formed by cutting out part of a lower portion of the
mounting flange, the suction passage communicating with the
compression chamber defined in the scroll body.
3. The fixed scroll as set forth in claim 2, wherein one side of
the suction passage forms a first inclined surface that is
successively extended from a distal end of the wrap by a
predetermined inclination to guide the gaseous refrigerant into the
compression chamber through the suction passage.
4. The fixed scroll as set forth in claim 3, wherein the other side
of the suction passage forms a second inclined surface that is
inclined relative to the wrap by a predetermined inclination to
guide the gaseous refrigerant into the compression chamber through
the suction passage.
5. A compression unit of a scroll compressor comprising: a fixed
scroll having an involuted wrap to define a compression chamber
therein; an orbiting scroll configured to be engaged with the fixed
scroll to allow gaseous refrigerant, introduced into the
compression chamber, to be compressed in accordance with an
orbiting motion of the orbiting scroll; a mounting flange formed
around a lower end of the fixed scroll to be arranged on an upper
surface of a main frame; and an interceptive suction portion formed
at the fixed scroll to guide the gaseous refrigerant, that is
upwardly directed along the main frame, into the compression
chamber.
6. The compression unit as set forth in claim 5, wherein a suction
baffle is formed at one side of the main frame to allow the
suctioned gaseous refrigerant to strike the suction baffle to
thereby be partially directed into the compression chamber.
7. The compression unit as set forth in claim 6, wherein the
suction baffle, having a concave shape, extends to the interceptive
suction portion.
8. The compression unit as set forth in claim 5, wherein the
interceptive suction portion includes a barrier and a suction
passage formed by cutting out part of a lower portion of the
mounting flange, the suction passage communicating with the
compression chamber.
9. The compression unit as set forth in claim 8, wherein one side
of the suction passage forms a first inclined surface that is
successively extended from a distal end of the wrap by a
predetermined inclination to guide the gaseous refrigerant into the
compression chamber through the suction passage.
10. The compression unit as set forth in claim 9, wherein the other
side of the suction passage forms a second inclined surface that is
inclined relative to the wrap by a predetermined inclination to
guide the gaseous refrigerant into the compression chamber through
the suction passage.
11. A scroll compressor comprising: a sealed shell provided with a
suction pipe and a discharge pipe; a crankshaft arranged in the
shell while being supported by main and sub frames; a compression
unit coupled to the crankshaft and adapted to compress gaseous
refrigerant that is suctioned via the suction pipe; and an
interceptive suction portion formed at the compression unit to
allow the suctioned gaseous refrigerant to strike a suction baffle
formed at the main frame to thereby be partially introduced into a
compression chamber defined in the compression unit.
12. The scroll compressor as set forth in claim 11, wherein the
compression unit includes: a fixed scroll having an involuted wrap
to define the compression chamber therein; an orbiting scroll
configured to be engaged with the fixed scroll to allow the gaseous
refrigerant, introduced into the compression chamber, to be
compressed in accordance with an orbiting motion of the orbiting
scroll; and a mounting flange formed around a lower end of the
fixed scroll to be arranged on an upper surface of the main
frame.
13. The scroll compressor as set forth in claim 11, wherein the
suction baffle, having a concave shape, extends to the interceptive
suction portion.
14. The scroll compressor as set forth in claim 12, wherein the
interceptive suction portion includes a barrier and a suction
passage formed by cutting out part of a lower portion of the
mounting flange, the suction passage communicating with the
compression chamber.
15. The scroll compressor as set forth in claim 14, wherein one
side of the suction passage forms a first inclined surface that is
successively extended from a distal end of the wrap by a
predetermined inclination to guide the gaseous refrigerant into the
compression chamber through the suction passage.
16. The scroll compressor as set forth in claim 15, wherein the
other side of the suction passage forms a second inclined surface
that is inclined relative to the wrap by a predetermined
inclination to guide the gaseous refrigerant into the compression
chamber through the suction passage.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] Pursuant to 35 U.S.C. .sctn. 119(a), this application claims
the benefit of earlier filing date and right of priority to Korean
Patent Application No. 10-2005-0026583, filed on Mar. 30, 2005, the
content of which is hereby incorporated by reference herein in its
entirety.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a scroll compressor, and
more particularly, to a fixed scroll of a scroll compressor which
can allow gaseous refrigerant, that is introduced into a compressor
shell via a suction pipe, to be directly introduced into a
compression chamber without being heated.
[0004] 2. Description of the Related Art
[0005] FIG. 1 is a longitudinal sectional view illustrating
important parts of a conventional scroll compressor. FIG. 2 is a
perspective view illustrating a fixed scroll of FIG. 1.
[0006] Arrows shown in FIGS. 1 and 2 indicate a flow direction of
suctioned gaseous refrigerant.
[0007] As shown in FIGS. 1 and 2, the conventional scroll
compressor includes a shell 100 defining a sealed space therein and
provided with a suction pipe 101 and a discharge pipe 102, a
compression unit 200 arranged in an upper portion of the shell 100
and adapted to compress gaseous refrigerant, and a crankshaft 300
supported by main and sub frames in the shell 100 and adapted to
drive the compression unit 200 when it is rotated by a drive
unit.
[0008] The compression unit 200 includes an orbiting scroll 201
arranged on an upper surface of a main frame 400 in the shell 100
while being coupled to an upper end of the crankshaft 300, and a
fixed scroll 202 arranged on the upper surface of the main frame
400 to be engaged with the orbiting scroll 201 such that a
compression chamber is defined between the scrolls 201 and 202.
With this configuration, when the orbiting scroll 201 performs an
orbiting motion in accordance with rotation of the crankshaft 300,
gaseous refrigerant is introduced into the compression chamber
defined between the scrolls 201 and 202 to thereby being compressed
therein.
[0009] In the scroll compressor configured as stated above, as the
gaseous refrigerant, that is introduced into the shell 100 via the
suction pipe 101, strikes a suction baffle 401 formed at one side
of the main frame 400, part of the gaseous refrigerant is directed
upward toward the compression unit 200, and the remaining gaseous
refrigerant is directed downward to be circulated inside the shell
100.
[0010] The part of the gaseous refrigerant, upwardly guided against
the suction baffle 401, is introduced into a compression chamber
202d defined in a wrap 202c via a suction port 202b formed at one
side of a scroll body 202a. On the other hand, the remaining
gaseous refrigerant, downwardly guided against the suction baffle
401, is heated while being circulated inside the shell 100. After
that, the heated gaseous refrigerant is directed upward to thereby
be circulated around the scroll body 202a as designated by arrows
of FIG. 2. In this way, the heated gaseous refrigerant is finally
guided to the suction port 202b.
[0011] The conventional scroll compressor configured as stated
above, however, has a problem that suctioned gaseous refrigerant,
that strikes the suction baffle, is not introduced directly into
the compression chamber, but is circulated along an outer
circumference of the scroll body, resulting in ineffective
introduction of the gaseous refrigerant into the compression
chamber.
[0012] Further, the conventional scroll compressor causes heated
gaseous refrigerant to be introduced into the compression chamber
after being circulated along the outer circumference of the scroll
body. This considerably degrades the volumetric efficiency of the
compressor, resulting in deterioration in the overall performance
of the compressor.
SUMMARY OF THE INVENTION
[0013] Therefore, the present invention has been made in view of
the above problems, and it is an object of the present invention to
provide a fixed scroll of a scroll compressor which can allow
suctioned gaseous refrigerant to be effectively introduced into a
compression chamber while preventing introduction of gaseous
refrigerant that is heated in the compressor.
[0014] It is another object of the present invention to provide a
fixed scroll of a scroll compressor which can achieve smooth
introduction of suctioned gaseous refrigerant into a compression
chamber while preventing introduction of heated gaseous refrigerant
via a simple deformation in the shape of the fixed scroll without
requiring installation of an additional member.
[0015] In accordance with the present invention, the above and
other objects can be accomplished by the provision of a fixed
scroll of a scroll compressor comprising: a scroll body having an
involuted wrap to define a compression chamber therein; a mounting
flange formed along an outer circumference of a lower end of the
scroll body to be arranged on an upper surface of a main frame; and
an interceptive suction portion configured to guide gaseous
refrigerant, that is directed upward along the main frame, into the
compression chamber defined in the scroll body.
[0016] Preferably, the interceptive suction portion may include a
barrier and a suction passage formed by cutting out part of a lower
portion of the mounting flange, the suction passage communicating
with the compression chamber defined in the scroll body.
[0017] Preferably, the suction baffle, having a concave shape, may
extend to the interceptive suction portion.
[0018] Preferably, one side of the suction passage may form a first
inclined surface that is successively extended from a distal end of
the wrap by a predetermined inclination to guide the gaseous
refrigerant into the compression chamber through the suction
passage.
[0019] Preferably, the other side of the suction passage may form a
second inclined surface that is inclined relative to the wrap by a
predetermined inclination to guide the gaseous refrigerant into the
compression chamber through the suction passage.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The above and other objects, features and other advantages
of the present invention will be more clearly understood from the
following detailed description taken in conjunction with the
accompanying drawings, in which:
[0021] FIG. 1 is a longitudinal sectional view illustrating
important parts of a conventional scroll compressor;
[0022] FIG. 2 is a perspective view illustrating a fixed scroll of
FIG. 1;
[0023] FIG. 3 is a bottom perspective view of a fixed scroll in
accordance with the present invention;
[0024] FIG. 4 is a perspective view illustrating the fixed scroll
of FIG. 3, which is coupled to a main frame; and
[0025] FIG. 5 is a longitudinal sectional view illustrating the
introduction of refrigerant in accordance with the present
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0026] Now, a preferred embodiment of the present invention will be
explained with reference to the accompanying drawings.
[0027] FIG. 3 is a bottom perspective view of a fixed scroll in
accordance with the present invention. FIG. 4 is a perspective view
illustrating the fixed scroll of FIG. 3, which is coupled to a main
frame.
[0028] As shown in FIGS. 3 and 4, the fixed scroll 1 of a scroll
compressor includes a scroll body 10 arranged on an upper surface
of a main frame 2 and defining a compression chamber 11 therein,
and an interceptive suction portion 20 formed at the scroll body 10
to guide gaseous refrigerant into the compression chamber 11.
[0029] The scroll body 10 has an involuted wrap 12 to define the
compression chamber 11 therein, and a mounting flange 13 formed
around a lower end of the scroll body 10 to be mounted on the upper
surface of the main frame 2.
[0030] The interceptive suction portion 20 serves to guide only
suctioned gaseous refrigerant, that is directed upward from a
suction baffle 2a formed at one side of the main frame 2, into the
compression chamber 11 while preventing the remaining gaseous
refrigerant, that is circulated around the scroll body 10, from
being introduced into the compression chamber 11. Here, the suction
baffle 2a has a concave shape and is configured to extend to the
interceptive suction portion 20. The interceptive suction portion
20 includes a barrier remained after cutting out part of a lower
portion of the mounting flange 13 formed around the scroll body 10
to form a suction passage 21 at a position corresponding to an
upper end of the suction baffle 2a. The suction passage 21 is
configured to communicate with the compression chamber 11.
[0031] With the interceptive suction portion 20 configured as
stated above, the gaseous refrigerant, that is upwardly directed
against the suction baffle 2a formed at one side of the main frame
2, strikes the barrier 22 to thereby be directly introduced into
the compression chamber 11 via the suction passage 21. Also, the
barrier 22 prevents heated gaseous refrigerant, that is circulated
around the scroll body 10, from being introduced into the suction
passage 21.
[0032] One side of the suction passage 21 forms an inclined surface
23 that is successively extended from a distal end of the wrap 12
by a predetermined inclination. The other side of the suction
passage 21 also forms an inclined surface 24 that is inclined
relative to the inclined surface 23 by a predetermined
inclination.
[0033] The inclined surfaces 23 and 24 serve to allow the gaseous
refrigerant to be more smoothly guided from the suction baffle 2a
of the main frame 2 into the compression chamber 11 defined in the
scroll body 10 via the suction passage 21.
[0034] FIG. 5 is a longitudinal sectional view illustrating the
introduction of the gaseous refrigerant in accordance with the
present invention.
[0035] As shown in FIG. 5, the suctioned gaseous refrigerant, which
is introduced into a shell 3 via a suction pipe 3a provided at the
shell 3, is directed upward by means of the suction baffle 2a of
the main frame 2 that is arranged to face the suction pipe 3a. The
upwardly directed gaseous refrigerant strikes the barrier 22,
thereby being introduced into the compression chamber 11 of the
wrap 12 formed at the scroll body 10 by way of the suction passage
21.
[0036] On the other hand, the remaining gaseous refrigerant, which
is directed downwardly against the suction baffle 2a, is heated
while being circulated in the compressor. Then, the heated gaseous
refrigerant is directed upward and is circulated around the scroll
body 10. In this case, the heated gaseous refrigerant is unable to
be introduced into the compression chamber 11 because of the
barrier 22 that blocks a passage to the suction passage 21. As a
result, the interceptive suction portion 20 of the present
invention allows the gaseous refrigerant, that is suctioned into
the shell 3 and strikes the suction baffle 2a, to be directly
introduced into the compression chamber 11 by means of the barrier
22 and the suction passage 21 while completely preventing the
introduction of the gaseous refrigerant that is heated in the shell
3.
[0037] As apparent from the above description, the present
invention provides a fixed scroll of a scroll compressor which can
allow suctioned gaseous refrigerant to be smoothly introduced into
a compression chamber while completely preventing introduction of
the remaining gaseous refrigerant that is heated in the compressor,
thereby achieving more stable introduction of the gaseous
refrigerant and improving the volumetric efficiency of the
compressor to achieve an improved compressor performance.
[0038] Further, according to the present invention, the fixed
scroll easily achieves effective introduction of suctioned gaseous
refrigerant into the compression chamber while completely
preventing introduction of heated gaseous refrigerant via a simple
deformation in the shape of the fixed scroll without requiring
installation of an additional member. This has the effect of
simplifying the manufacturing process of the compressor and
reducing manufacturing costs thereof.
[0039] Although the preferred embodiments of the present invention
have been disclosed for illustrative purposes, those skilled in the
art will appreciate that various modifications, additions and
substitutions are possible, without departing from the scope and
spirit of the invention as disclosed in the accompanying
claims.
* * * * *