U.S. patent application number 12/773436 was filed with the patent office on 2011-04-07 for scroll compressor.
This patent application is currently assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE. Invention is credited to Tse Liang Hsiao, Liang Qiao Huang, Pei Yu Yu.
Application Number | 20110081269 12/773436 |
Document ID | / |
Family ID | 43823328 |
Filed Date | 2011-04-07 |
United States Patent
Application |
20110081269 |
Kind Code |
A1 |
Hsiao; Tse Liang ; et
al. |
April 7, 2011 |
SCROLL COMPRESSOR
Abstract
A scroll compressor includes an orbiting scroll member, a
non-orbiting scroll member, a spacing block, and an annular
pressure piece. The non-orbiting scroll member is disposed on the
orbiting scroll member. The spacing block has a first annular
recess and at least one first through hole. The spacing block is
disposed on the non-orbiting scroll member. The first through hole
is located within the first annular recess and penetrates the
spacing block. The annular pressure piece has a second annular
recess and at least one second through hole. The second through
hole is located within the second annular recess and penetrates the
annular pressure piece. The annular pressure piece is accommodated
within the first annular recess. One side disposed with the second
annular recess of the annular pressure piece faces the spacing
block. The annular pressure piece is located between the spacing
block and the non-orbiting scroll member.
Inventors: |
Hsiao; Tse Liang; (Hsinchu,
TW) ; Yu; Pei Yu; (Pingtung County, TW) ;
Huang; Liang Qiao; (Changhua County, TW) |
Assignee: |
INDUSTRIAL TECHNOLOGY RESEARCH
INSTITUTE
Hsinchu
TW
|
Family ID: |
43823328 |
Appl. No.: |
12/773436 |
Filed: |
May 4, 2010 |
Current U.S.
Class: |
418/55.5 |
Current CPC
Class: |
F04C 23/008 20130101;
F04C 27/005 20130101; F04C 18/0215 20130101 |
Class at
Publication: |
418/55.5 |
International
Class: |
F01C 1/063 20060101
F01C001/063 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 2, 2009 |
TW |
098133651 |
Claims
1. A scroll compressor, comprising: a motor, having a transmission
shaft; a frame, disposed on the motor; an orbiting scroll member,
disposed on the frame, wherein the transmission shaft penetrates
the frame and is connected to the orbiting scroll member; a
non-orbiting scroll member, disposed on the orbiting scroll member;
a spacing block, having a first annular recess and at least one
first through hole, wherein the first through hole is located
within the first annular recess and penetrates the spacing block,
and the spacing block is disposed on the non-orbiting scroll
member; an annular pressure piece, having a second annular recess
and at least one second through hole, wherein the second through
hole is located within the second annular recess and penetrates the
annular pressure piece, the annular pressure piece is accommodated
within the first annular recess, one side disposed with the second
annular recess of the annular pressure piece faces the non-orbiting
scroll member, and the annular pressure piece is located between
the spacing block and the non-orbiting scroll member; and a shell,
for accommodating the motor, the frame, the orbiting scroll member,
the spacing block, and the annular pressure piece.
2. The scroll compressor according to claim 1, wherein the spacing
block is fixed within the shell and the annular pressure piece is
disposed within the first annular recess in a manner of sliding
relative to the spacing block.
3. The scroll compressor according to claim 2, wherein the
non-orbiting scroll member has a projecting portion, the through
hole penetrates the projecting portion, and the projecting portion
penetrates the spacing block in a manner of sliding relative to the
spacing block.
4. The scroll compressor according to claim 3, wherein the spacing
block separates the shell into a high pressure cavity and a low
pressure cavity, the orbiting scroll member and the non-orbiting
scroll member compress a refrigerant into a high-pressure gaseous
refrigerant when the refrigerant enters the low pressure cavity,
and the high-pressure gaseous refrigerant enters the high pressure
cavity via the through hole.
5. The scroll compressor according to claim 4, wherein the
high-pressure gaseous refrigerant is distributed within the second
annular recess via the first through hole and the second through
hole, so as to push the non-orbiting scroll member towards the
orbiting scroll member.
6. The scroll compressor according to claim 3, further comprising:
an annular sealing piece, wherein the projecting portion penetrates
the annular sealing piece and the annular sealing piece is located
between the projecting portion and the spacing block.
7. The scroll compressor according to claim 1, further comprising:
an annular sealing piece, disposed between an inner wall surface of
the spacing block disposed with the first annular recess and the
annular pressure piece.
8. The scroll compressor according to claim 1, further comprising:
an annular sealing piece, disposed between an outer wall surface of
the spacing block disposed with the first annular recess and the
annular pressure piece.
9. The scroll compressor according to claim 1, wherein an inner
edge of the annular pressure piece has an annular flange.
10. The scroll compressor according to claim 1, wherein an outer
edge of the annular pressure piece has an annular flange.
11. The scroll compressor according to claim 1, wherein the frame
is fixed to the shell and the transmission shaft is a crank
shaft.
12. The scroll compressor according to claim 1, wherein the annular
pressure piece has more than two second through holes.
13. The scroll compressor according to claim 1, wherein the second
through hole is circular or strip-shaped.
14. The scroll compressor according to claim 13, wherein the
annular pressure piece has more than two second through holes.
15. The scroll compressor according to claim 1, wherein an outer
edge of the second annular recess is a linear type and an inner
edge of the second annular recess is the annular flange.
16. The scroll compressor according to claim 1, wherein the second
through holes are distributed on the annular pressure piece in a
symmetric manner.
17. The scroll compressor according to claim 1, wherein the spacing
block further has a third through hole.
18. The scroll compressor according to claim 17, wherein the
projecting portion of the non-orbiting scroll member is inserted in
the third through hole.
19. The scroll compressor according to claim 1, wherein the second
annular recess communicates with the first through hole and the
second through hole.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This non-provisional application claims priority under 35
U.S.C. .sctn.119(a) on Patent Application No(s). 098133651 filed in
Taiwan, R.O.C. on Oct. 2, 2009, the entire contents of which are
hereby incorporated by reference.
BACKGROUND
[0002] 1. Technical Field
[0003] The present invention relates to a compressor, and more
particularly to a scroll compressor.
[0004] 2. Related Art
[0005] A compressor is a main element in an air conditioner and a
refrigerator used in daily life. In fact, the compressor is closely
associated with muting effect, heat exchange effect, and service
life of the above two electrical apparatuses.
[0006] In a conventional scroll compressor, an orbiting scroll
member is usually driven by rotation of a motor rotor, such that
the orbiting scroll member performs engaging movement of revolution
about a non-orbiting scroll member without spinning. Through such
movement, the conventional scroll compressor sucks a working fluid
into a space between the orbiting scroll member and the
non-orbiting scroll member, compresses the working fluid, and then
discharges the high-pressure working fluid.
[0007] However, in order to efficiently perform the above movement,
a desirable air tight effect must be ensured between the
non-orbiting scroll member and the orbiting scroll member. If a
poor air tight effect is provided between the non-orbiting scroll
member and the orbiting scroll member, the orbiting scroll member
may crash the non-orbiting scroll member due to instable pressing
and holding effects, which may cause problems that the compressor
produces noises, excessive abrasion is generated between the
non-orbiting scroll member and the orbiting scroll member, and the
service life of the compressor is shortened.
SUMMARY
[0008] In view of the above problems, the present invention is a
scroll compressor, which is applicable to solve the problem that a
desirable air tight effect cannot be provided between a
non-orbiting scroll member and an orbiting scroll member in the
prior art.
[0009] Based on the above and other objectives, the present
invention provides a scroll compressor, which comprises a motor, a
frame, an orbiting scroll member, a non-orbiting scroll member, a
spacing block, an annular pressure piece, and a shell. The frame is
located between the motor and the orbiting scroll member, and a
transmission shaft of the motor penetrates the frame and is
connected to the orbiting scroll member. The non-orbiting scroll
member is disposed on the orbiting scroll member. The spacing block
has a first annular recess and at least one first through hole. The
spacing block is disposed on the non-orbiting scroll member. The
first through hole is located within the first annular recess and
penetrates the spacing block. The annular pressure piece has a
second annular recess and at least one second through hole. The
second through hole is located within the second annular recess and
penetrates the annular pressure piece. The annular pressure piece
is accommodated within the first annular recess. One side disposed
with the second annular recess of the annular pressure piece faces
the non-orbiting scroll member, and the annular pressure piece is
located between the spacing block and the non-orbiting scroll
member. The shell accommodates the motor, the frame, the orbiting
scroll member, the spacing block, and the annular pressure
piece.
[0010] According to an alternative embodiment, the spacing block is
fixed within the shell. The annular pressure piece is disposed
within the first annular recess in a manner of sliding relative to
the spacing block. Preferably, the non-orbiting scroll member has a
projecting portion. The above through hole penetrates the
projecting portion. The projecting portion penetrates the spacing
block in a manner of sliding relative to the spacing block. In
addition, the spacing block separates the shell into a high
pressure cavity and a low pressure cavity. When a refrigerant
enters the low pressure cavity, the orbiting scroll member and the
non-orbiting scroll member compress the refrigerant into a
high-pressure gaseous refrigerant. Then, the high-pressure gaseous
refrigerant enters the high pressure cavity via the through hole.
Moreover, the high-pressure gaseous refrigerant is distributed
within the second annular recess via the first through hole and the
second through hole, for example, so as to push the non-orbiting
scroll member towards the orbiting scroll member. More preferably,
the scroll compressor further comprises an annular sealing piece.
The projecting portion penetrates the annular sealing piece, and
the annular sealing piece is located between the projecting portion
and the spacing block.
[0011] According to an alternative embodiment of the present
invention, the scroll compressor further comprises an annular
sealing piece, which is disposed between an inner wall surface of
the spacing block disposed with the first annular recess and the
annular pressure piece.
[0012] According to an alternative embodiment of the present
invention, the scroll compressor further comprises an annular
sealing piece, which is disposed between an outer wall surface of
the spacing block disposed with the first annular recess and the
annular pressure piece.
[0013] According to an alternative embodiment of the present
invention, an inner edge of the annular pressure piece has an
annular flange.
[0014] According to an alternative embodiment of the present
invention, an outer edge of the annular pressure piece has an
annular flange.
[0015] According to an alternative embodiment of the present
invention, the frame is fixed to the shell and the transmission
shaft is a crank shaft.
[0016] According to an alternative embodiment of the present
invention, the annular pressure piece has more than two second
through holes and the through holes are circular or
strip-shaped.
[0017] According to an alternative embodiment of the present
invention, an outer edge of the second annular recess is a linear
type and an inner edge of the second annular recess is an annular
flange.
[0018] According to an alternative embodiment of the present
invention, the second through holes are distributed on the annular
pressure piece in a symmetric manner.
[0019] According to an alternative embodiment of the present
invention, the spacing block further has a third through hole.
Preferably, the projecting portion of the non-orbiting scroll
member is inserted in the third through hole.
[0020] According to an alternative embodiment of the present
invention, the second annular recess communicates with the first
through hole and the second through hole.
[0021] In the scroll compressor, the annular pressure piece is
located between the spacing block and the non-orbiting scroll
member, the annular pressure piece is accommodated within the first
annular recess, and one side disposed with the second annular
recess of the annular pressure piece faces the spacing block. Thus,
when the compressed high temperature and high pressure refrigerant
is dissipated from one side of the non-orbiting scroll member
facing the orbiting scroll member to the other side away from the
orbiting scroll member, the high temperature and high pressure gas
is enabled to press the non-orbiting scroll member towards the
orbiting scroll member through the first through hole and the
second through hole, so as to enhance the air tightness between the
orbiting scroll member and the non-orbiting scroll member.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The present invention will become more fully understood from
the detailed description given herein below for illustration only,
and thus are not limitative of the present invention, and
wherein:
[0023] FIG. 1 is a schematic sectional view of a scroll compressor
according to an embodiment of the present invention;
[0024] FIG. 2 is a schematic sectional view taken along a section
line AA in FIG. 1;
[0025] FIG. 3 is a partially-enlarged schematic view of FIG. 1;
[0026] FIG. 4 is a schematic top view of an annular pressure piece
in FIG. 1;
[0027] FIG. 5 is a schematic view taken along a section line BB in
FIG. 4;
[0028] FIG. 6 is a schematic top view of an annular pressure piece
according to another embodiment of the present invention;
[0029] FIG. 7 is a schematic top view of an annular pressure piece
according to yet another embodiment of the present invention;
[0030] FIG. 8 is a schematic sectional view of an annular pressure
piece according to still another embodiment of the present
invention; and
[0031] FIG. 9 is a schematic sectional view of an annular pressure
piece according to yet another embodiment of the present
invention.
DETAILED DESCRIPTION OF THE INVENTION
[0032] In the detailed description below, detailed features and
advantages of the present invention are illustrated, the contents
are sufficient for any person skilled in the art to understand and
implement the technical contents of the present invention. Any
person skilled in the art can easily understand relevant objectives
and advantages of the present invention according to the contents
disclosed in the specification, the claims, and the accompanying
drawings. The view points of the present invention are further
illustrated in detail in the following embodiments, and none of the
view points is intended to limit the scope of the present
invention.
[0033] FIG. 1 is a schematic sectional view of a scroll compressor
according to an embodiment of the present invention. Referring to
FIG. 1, a scroll compressor 100 comprises a shell 110, a motor 120,
a frame 130, an orbiting scroll member 140, a non-orbiting scroll
member 150, a spacing block 160, and an annular pressure piece
170.
[0034] The shell 110 has an accommodation space. The spacing block
160 is located within the accommodation space and fixed to the
shell 110. An outer edge of the spacing block 160 is connected to
an inner wall surface of the shell 110 in an air tight manner, so
as to separate the accommodation space into a high pressure cavity
H and a low pressure cavity L.
[0035] The motor 120 is located within the low pressure cavity L
and is located at a bottom of the shell 110. The motor 120
comprises a motor body 122 and a transmission shaft 124. In this
embodiment, the transmission shaft 124 is a crank shaft. Thus, when
one end of the transmission shaft 124 is connected to the motor
body 122 and the transmission shaft 124 rotates upon being driven
by the motor body 122, the transmission shaft 124 moves on a plane
along a circular arc path.
[0036] The frame 130 is located within the low pressure cavity L
and fixed on the inner wall surface of the shell 110. The
transmission shaft 124 penetrates the frame 130 from one side of
the frame 130 and projects to the other side of the frame 130.
[0037] The orbiting scroll member 140 is located within the low
pressure cavity L and comprises a scroll member body 142 and a wall
144. The scroll member body 142 is located on the frame 130 and has
two sides opposite to each other. The transmission shaft 124
penetrates the frame 130 and is connected to one side of the scroll
member body 142. The wall 144 stands on the other side of the
scroll member body 142 and extends on the scroll member body 142
along a vortex-shaped path.
[0038] Based on the structures of the motor 120, the frame 130, and
the orbiting scroll member 140, the orbiting scroll member 140 is
enabled to be driven by the motor 120 to move on the frame 130
along a circular arc path.
[0039] The non-orbiting scroll member 150 is located within the low
pressure cavity L and is located between the spacing block 160 and
the orbiting scroll member 140. The non-orbiting scroll member 150
comprises a scroll member body 152 and a wall 154. The scroll
member body 152 is located on the orbiting scroll member 140. The
scroll member body 152 has a first side 152a and a second side 152b
opposite to each other. The scroll member body 152 is located on
the wall 144 and contacts the wall 144. The wall 154 stands at one
side of the scroll member body 152 facing the orbiting scroll
member 140, that is, standing at the first side 152a of the scroll
member body 152. The wall 154 bears against the scroll member body
142, such that a plurality of compression cavities P is formed
between the wall 144 and the wall 154.
[0040] The structure of the spacing block 160 is further described
below. FIG. 2 is a schematic sectional view taken along a section
line AA in FIG. 1. FIG. 3 is a partially-enlarged schematic view of
FIG. 1. Referring to FIGS. 1 to 3, one side of the spacing block
160 facing the non-orbiting scroll member 150 has a first annular
recess 162 and a first through hole 164. The first through hole 164
is located within the first annular recess 162 and penetrates the
spacing block 160.
[0041] A connection relation between the spacing block 160 and the
non-orbiting scroll member 150 is illustrated in the following
through examples. In this embodiment, the other side of the scroll
member body 152 opposite to the first side 152a (that is, the
second side 152b) has a projecting portion 156. The spacing block
160 further has a third through hole 166. The projecting portion
156 is inserted into the spacing block 160 through the third
through hole 166. The non-orbiting scroll member 150 further has a
through hole 158. The through hole 158 penetrates the non-orbiting
scroll member 150, such that one of the compression cavities P that
is located at a center of the scroll member body 152 communicates
with the high pressure cavity H. Preferably, the projecting portion
156 is inserted into the spacing block 160 in a manner of sliding
relative to the spacing block 160. In addition, in order to
increase the air tightness between the spacing block 160 and the
projecting portion 156, for example, the scroll compressor 100 may
further comprise an annular sealing piece 180. The projecting
portion 156 penetrates the annular sealing piece 180 and the
annular sealing piece 180 is located between the projecting portion
156 and the spacing block 160.
[0042] FIG. 4 is a schematic top view of the annular pressure piece
170 in FIG. 1. FIG. 5 is a schematic view taken along a section
line BB in FIG. 4. Referring to FIGS. 1 to 4, the annular pressure
piece 170 is located between the spacing block 160 and the
non-orbiting scroll member 150 and the annular pressure piece 170
is accommodated within the first annular recess 162. Preferably,
the annular pressure piece 170 is disposed within the first annular
recess 162 in a manner of sliding relative to the spacing block
160. The annular pressure piece 170 has a second annular recess 172
and at least one second through hole 174. The second through hole
174 is located within the second annular recess 172 and penetrates
the annular pressure piece 170. One side disposed with the second
annular recess 172 of the annular pressure piece 170 faces the
non-orbiting scroll member 150. Based on the above structure, the
second annular recess 172 communicates with the high pressure
cavity H through the second through hole 174 and the first through
hole 164 in sequence.
[0043] Preferably, in order to enhance the air tightness between
the spacing block 160 and the annular pressure piece 170, the
scroll compressor 100 further has an annular sealing piece 190 and
an annular sealing piece 195. The annular sealing piece 190 is
disposed between an inner wall surface of the spacing block 160
disposed with the first annular recess 162 and the annular pressure
piece 170. The annular sealing piece 195 is disposed between an
outer wall surface of the spacing block 160 disposed with the first
annular recess 162 and the annular pressure piece 170.
[0044] Based on the above structures, when a low-pressure gaseous
refrigerant R enters the low pressure cavity L from exterior of the
shell 110 and enters the compression cavities P from the low
pressure cavity L, the low-pressure gaseous refrigerant R is
squeezed by the wall 144 and wall 154, moves towards a central
position of the non-orbiting scroll member 150, and is gradually
compressed into a high-pressure gaseous refrigerant R from the
low-pressure gaseous refrigerant R. Subsequently, the high-pressure
gaseous refrigerant R is dissipated to the high pressure cavity H
via the through hole 158. As the high pressure cavity H
communicates with the second annular recess 172 through the first
through hole 164 and the second through hole 174, a pressure of the
gas located in the second annular recess 172 is higher than that of
the gas located within the low pressure cavity L. Therefore, the
high-pressure gaseous refrigerant R filled in the second annular
recess 172 pushes the non-orbiting scroll member 150 towards the
orbiting scroll member 140. Based on such a structure, in this
embodiment, the air tightness between the non-orbiting scroll
member 150 and the orbiting scroll member 140 is enhanced by using
the pushing effect of the high-pressure gaseous refrigerant R,
thereby preventing the pressurized refrigerant R from dissipating
out of the compression cavities P.
[0045] Although the annular pressure piece 170 only has a single
second through hole 174 in this embodiment, it is not intended to
limit the number of the second through holes in the present
invention. FIG. 6 is a schematic top view of an annular pressure
piece 170' according to another embodiment of the present
invention. Different from the annular pressure piece 170 shown in
FIGS. 2, 4, and 5, the annular pressure piece 170' in this
embodiment may have a plurality of second through holes 174
distributed on the annular pressure piece 170' in a symmetric
manner. In other words, persons skilled in the art may use an
annular pressure piece having a single second through hole or a
plurality of second through holes depending on design demands.
[0046] Moreover, the second through holes 174 of the annular
pressure piece 170 and the annular pressure piece 170' are
circular, but the shape of the second through holes is not limited
in the present invention. FIG. 7 is a schematic top view of an
annular pressure piece 170'' according to yet another embodiment of
the present invention. Different from the annular pressure piece
170 and the annular pressure piece 170', the annular pressure piece
170'' has strip-shaped second through holes 174'. In other words,
persons skilled in the art can change the shape of the second
through hole of the annular pressure piece depending on design
demands.
[0047] Similarly, the above embodiment is not intended to limit the
shape of the annular pressure piece in the present invention. FIG.
8 is a schematic sectional view of an annular pressure piece 170'''
according to still another embodiment of the present invention. In
this embodiment, an inner edge of the annular pressure piece 170'''
has an annular flange 176. In addition, FIG. 9 is a schematic
sectional view of an annular pressure piece 170'''' according to
yet another embodiment of the present invention. Different from the
annular pressure piece 170''' shown in FIG. 8, besides having the
annular flange 176 formed on an inner edge, the annular pressure
piece 170'''' further has an annular flange 178 on an outer edge.
Through the design of the annular flanges 176/178, in the present
invention, a contact area between the annular pressure piece
170'''/170'''' and the non-orbiting scroll member 150 is increased,
thereby enhancing the air tightness between the annular pressure
piece 170'''/170'''' and the non-orbiting scroll member 150.
[0048] To sum up, in the scroll compressor, the annular pressure
piece is located between the spacing block and the non-orbiting
scroll member, the annular pressure piece is accommodated within
the first annular recess, and one side disposed with the second
annular recess of the annular pressure piece faces the spacing
block. Thus, when the compressed high temperature and high pressure
refrigerant is dissipated from one side of the non-orbiting scroll
member facing the orbiting scroll member to the other side away
from the orbiting scroll member, the high temperature and high
pressure gas is enabled to press the non-orbiting scroll member
towards the orbiting scroll member through the first through hole
and the second through hole, so as to enhance the air tightness
between the orbiting scroll member and the non-orbiting scroll
member.
* * * * *