U.S. patent application number 12/543143 was filed with the patent office on 2010-03-25 for compressor of vehicle's cooling system.
This patent application is currently assigned to Hyundai Motor Company. Invention is credited to Byeong Jun LEE.
Application Number | 20100074766 12/543143 |
Document ID | / |
Family ID | 42037871 |
Filed Date | 2010-03-25 |
United States Patent
Application |
20100074766 |
Kind Code |
A1 |
LEE; Byeong Jun |
March 25, 2010 |
Compressor of Vehicle's Cooling System
Abstract
A compressor of the vehicle's cooling system is configured such
that an external refrigerant is introduced into a shaft in a radial
direction through a body, flows in the shaft in an axial direction,
and then is discharged to a refrigerant compression space in the
body, thereby shortening the flow path of the refrigerant and
minimizing flow path resistance. Moreover, since no suction valves
and suction chambers are required, the structure is simplified and
the cost is reduced.
Inventors: |
LEE; Byeong Jun; (Ulsan,
KR) |
Correspondence
Address: |
MORGAN, LEWIS & BOCKIUS LLP (SF)
One Market, Spear Street Tower, Suite 2800
San Francisco
CA
94105
US
|
Assignee: |
Hyundai Motor Company
Seoul
KR
Kia Motors Corporation
Seoul
KR
|
Family ID: |
42037871 |
Appl. No.: |
12/543143 |
Filed: |
August 18, 2009 |
Current U.S.
Class: |
417/269 |
Current CPC
Class: |
F04B 27/1018 20130101;
F04B 27/12 20130101; F04B 27/1081 20130101 |
Class at
Publication: |
417/269 |
International
Class: |
F04B 27/08 20060101
F04B027/08 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 25, 2008 |
KR |
10-2008-0094304 |
Claims
1. A compressor of a vehicle's cooling system comprising: a body
formed to introduce a refrigerant from the outside in a radial
direction thereof; and a shaft rotatably coupled to the body and
formed such that the refrigerant introduced into the body enters
into the shaft in the radial direction thereof, flows in an axial
direction thereof, and then exits in the radial direction thereof
toward a refrigerant compression space formed in the body.
2. The compressor of claim 1, wherein a body refrigerant inlet hole
is formed on a circumferential surface of the body so as to
introduce the refrigerant from the outside into the shaft in the
radial direction of the body.
3. The compressor of claim 1, wherein a refrigerant flow path is
formed in the shaft so as to move the refrigerant in the axial
direction thereof.
4. The compressor of claim 1, wherein at least a portion of the
shaft is formed in a hollow shape, one end of which is closed.
5. The compressor of claim 1, wherein shaft refrigerant inlet holes
for allowing the refrigerant introduced into the body to enter into
the shaft and shaft refrigerant outlet holes for discharging the
refrigerant introduced to the inside of the shaft to the
refrigerant compression space of the body are respectively formed
on a circumferential surface of the shaft in the radial direction
thereof.
6. The compressor of claim 5, wherein the shaft refrigerant inlet
holes and the shaft refrigerant outlet holes are spaced with a
predetermined angle therebetween in a rotational direction of the
shaft.
7. The compressor of claim 5, wherein the shaft refrigerant inlet
holes are formed substantially in a middle portion of the shaft and
the shaft refrigerant outlet holes are disposed at forward and
rearward sides from the shaft refrigerant inlet holes.
8. The compressor of claim 5, wherein the shaft refrigerant inlet
holes and the shaft refrigerant outlet holes are formed in plural
number, respectively.
9. The compressor of claim 5, wherein a first boss portion to which
the shaft is axially coupled is formed at a central portion of the
body, and body refrigerant outlet holes communicating with the
shaft refrigerant outlet holes and for discharging the refrigerant
coming from the shaft to the refrigerant compression space are
formed in a second boss portion of the body.
10. The compressor of claim 9, wherein the body refrigerant outlet
holes are formed in a direction inclined at a predetermined angle
from a longitudinal axis of the shaft toward the distal ends of the
body.
11. The compressor of claim 1, wherein front and rear surfaces of
the refrigerant compression space of the body are respectively
opened, and front and rear heads for guiding the compressed
refrigerant coming from the refrigerant compression space to the
outside are coupled to the opened front and rear surfaces
respectively.
12. The compressor of claim 11, wherein discharge valves for
controlling discharge of the refrigerant are installed between the
refrigerant compression space and the front and rear heads.
13. The compressor of claim 1, wherein a swash plate is axially
coupled to the shaft, and a swash plate refrigerant inlet hole
communicating with the shaft refrigerant inlet holes is formed on
the swash plate so as to guide the refrigerant introduced into the
body to the shaft.
14. The compressor of claim 13, wherein the shaft refrigerant inlet
holes and the swash plate refrigerant inlet hole are disposed on a
straight line in the radial direction of the shaft.
15. The compressor of claim 13, wherein the swash plate comprises a
first boss portion axially coupled to the shaft and a disc portion
formed in a circumferential direction of the first boss portion and
disposed at an inclination inside the body, and the swash plate
refrigerant inlet hole is formed in the first boss portion.
16. The compressor of claim 14, wherein a piston for compressing
the refrigerant in the refrigerant compression space while moving
back and forth according to rotation of the shaft is coupled to the
disc portion of the swash plate.
17. The compressor of claim 5, wherein at least a portion of the
shaft is formed in a hollow shape, of which one end is closed and
an additional inlet hole for guiding the refrigerant not introduced
to the shaft refrigerant inlet holes is formed at the other end of
the shaft.
18. A compressor of a vehicle's cooling system comprising: a body
having a body refrigerant inlet hole formed therein to introduce a
refrigerant from the outside in a radial direction thereof; a shaft
rotatably disposed in the body and having shaft refrigerant inlet
holes and shaft refrigerant outlet holes, the shaft refrigerant
inlet holes for introducing the refrigerant introduced via the body
refrigerant inlet hole and the shaft refrigerant outlet holes for
discharging the refrigerant introduced to the inside of the shaft
toward a refrigerant compression space formed in the body in a
radial direction of the shaft; a swash plate axially coupled to the
shaft and having a swash plate refrigerant inlet hole communicating
with the shaft refrigerant inlet hole; a piston coupled to one side
of the swash plate and linearly reciprocating in the body during
rotation of the shaft; and front and rear heads respectively
installed on opened front and rear surfaces of the body and for
discharging the compressed refrigerant coming from the refrigerant
compression space to the outside.
19. The compressor of claim 18, wherein a refrigerant flow path is
formed in the shaft so as to move the refrigerant in an axial
direction thereof.
20. The compressor of claim 18, wherein body refrigerant outlet
holes communicating with the shaft refrigerant outlet holes are
formed in the body for discharging the refrigerant coming from the
shaft to the refrigerant compression space.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims priority to Korean Patent
Application No. 10-2008-0094304, filed on Sep. 25, 2008, the entire
contents of which is incorporated herein for all purposes by this
reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a compressor of a vehicle's
cooling system, and more particularly, to a compressor of a
vehicle's cooling system which can minimize flow resistance of a
refrigerant in the compressor and increase compression efficiency,
and further can improve the performance of an air conditioner.
[0004] 2. Description of Related Art
[0005] Generally, a vehicle's cooling system circulates a
refrigerant by using a compressor, a condenser, an expander, and an
evaporator, and cools air in the interior of the vehicle by using
an evaporative latent heat of the refrigerant. That is, the
refrigerant is heat-exchanged with the air of the vehicle interior
as it passes through the evaporator, thereby cooling the interior
of the vehicle and changing to a low temperature low pressure gas
state. This refrigerant of the low temperature low pressure gas
state changes to a high temperature high pressure gas state in the
compressor, and then is heat-exchanged with air outside the vehicle
as it passes through the condenser and changes to a high
temperature high pressure liquid state, and then changes to a low
temperature low pressure liquid state as it passes through the
expander and is moved back to the evaporator.
[0006] Among them, the compressor also functions as a driving
source for allowing the refrigerant to circulate, as well as
compressing the refrigerant. Thus, the compression efficiency of
the refrigerant in the compressor significantly affects the
performance of the vehicle's cooling system.
[0007] FIG. 1 is a cross sectional view showing a compressor of a
vehicle's cooling system according to the prior art.
[0008] Referring to FIG. 1, the compressor of the vehicle's cooling
system according to the prior art comprises a cylindrical body 1,
covers 2 and 3 coupled with the body 1 to seal the refrigerant, and
valve plates 4 and 5 disposed opposite sides of the body 1.
[0009] A storage space 1a for storing the refrigerant entering and
exiting the body 1 is formed in the body 1, a compression space 1b
for compressing the refrigerant is formed, spaced apart inward from
the storage space 1a, a shaft 6 is rotatably disposed in the
compression space 1b, horizontally penetrating the compression
space 1b, a swash plate 7 is rotatably coupled to an outer surface
of the shaft 6 so as to be rotatable along with the shaft 6 in a
circumferential direction, and a piston 8 for compressing the
refrigerant to be filled in the compression space is coupled to the
swash plate 7.
[0010] The swash plate 7 is obliquely formed so as to receive
rotational force of the shaft 6 and reciprocate the piston 8, and
the piston 8 reciprocates in the compression space 1b in company
with the rotation of the swash plate 7 to thus compress the
refrigerant filled in the compression space 1b.
[0011] The covers 2 and 3 comprise a front cover 2 disposed at the
front side of the body 1 and a rear cover 3 disposed at the rear
side of the body 1. Suction chambers 2a and 3a, which are a space
for introducing a refrigerant from the storage space 1a of the body
1, and discharge chambers 2b and 3b, which are a space for
discharging the refrigerant back to the storage space 1a after
introduction of compressed refrigerant from the compression space
1b, are respectively formed on the front cover 2 and the rear cover
3. Although not shown, a hole through which the refrigerant can
move is formed in the body 1, the storage space 1a of the body 1
and the suction chambers 2a and 3a communicate with each other
through this hole, and the storage space 1a of the body 1 and the
discharge chambers 2b and 3b of the covers 2 and 3 also communicate
with each other.
[0012] A pulley 9 connected to the shaft 6 to transfer rotational
force to the shaft 6 is disposed on an outer side of the front
cover 2, and the pulley 9 has grooves 9a for mounting a belt
transferring the rotational force from the engine thereon.
[0013] Valve plates 4 and 5 are disposed between the front side of
the body 1 and the front cover 2 and between the rear side of the
body 1 and the rear cover 3, respectively. The valve plates 4 and 5
have suction openings 4a and 5a for sucking a low temperature low
pressure refrigerant from the suction chambers 2a and 3a to the
compression space 1b and discharge openings 4b and 5b for
discharging a refrigerant sucked into the compression space 1b and
compressed at a high temperature and high pressure to the discharge
chambers 2b and 3b.
[0014] The valve plates 4 and 5 are provided with suction valves in
the suction openings 4a and 5a. The suction valves are opened only
during the suction stroke of the piston 8 to suck a low temperature
low pressure refrigerant from the suction chambers 2a and 3a to the
compression space 1b and closed by pressure during the discharge
stroke of the piston 8, thereby preventing a high temperature high
pressure refrigerant from leaking into the suction chambers 2a and
3a from the compression space 1b.
[0015] Further, the valve plates 4 and 5 are provided with
discharge valves in the discharge holes 4b and 5b. The discharge
valves are opened only during the discharge stroke of the piston 8
to discharge a high temperature high pressure refrigerant from the
compression space 1b to the discharge chambers 2b and 3b and closed
by pressure during the suction stroke of the piston 8, thereby
preventing a low temperature low pressure refrigerant from leaking
into the discharge chambers 2b and 3b from the compression space
1b.
[0016] The operation of the thus-constructed compressor of the
vehicle's cooling system according to the prior art will be
discussed below.
[0017] A low temperature low pressure refrigerant introduced into
the storage space 1a via an entrance hole during the suction stroke
of the piston 8 is moved to the suction chambers 2a and 3a, and
then is sucked into the compression space 1b via the suction
openings 4a and 5a formed in the valve plates 4 and 5 and
compressed by the compression stroke of the piston 8. Next, the
refrigerant is discharged to the discharge chambers 2b and 3b via
the discharge openings 4b and 5b formed on the valve plates 4 and 5
during the discharge stroke of the piston 8, and then introduced
into the storage space 1a and discharged to a condenser via an exit
hole.
[0018] The information disclosed in this Background of the
Invention section is only for enhancement of understanding of the
general background of the invention and should not be taken as an
acknowledgement or any form of suggestion that this information
forms the prior art already known to a person skilled in the
art.
BRIEF SUMMARY OF THE INVENTION
[0019] Various aspects of the present invention are directed to
provide a compressor of a vehicle's cooling system which can
minimize flow resistance of a refrigerant in the compressor and
increase compression efficiency, and further can improve the
performance of an air conditioner.
[0020] In an aspect of the present invention, the compressor of a
vehicle's cooling system may include a body formed to introduce a
refrigerant from the outside in a radial direction thereof, and a
shaft rotatably coupled to the body and formed such that the
refrigerant introduced into the body enters into the shaft in the
radial direction thereof, flows in an axial direction thereof, and
then exits in the radial direction thereof toward a refrigerant
compression space formed in the body.
[0021] A body refrigerant inlet hole may be formed on a
circumferential surface of the body so as to introduce the
refrigerant from the outside into the shaft in the radial direction
of the body.
[0022] A refrigerant flow path may be formed in the shaft so as to
move the refrigerant in the axial direction thereof.
[0023] At least a portion of the shaft may be formed in a hollow
shape, one end of which is closed.
[0024] Shaft refrigerant inlet holes for allowing the refrigerant
introduced into the body to enter into the shaft and shaft
refrigerant outlet holes for discharging the refrigerant introduced
to the inside of the shaft to the refrigerant compression space of
the body may be respectively formed on a circumferential surface of
the shaft in the radial direction thereof.
[0025] The shaft refrigerant inlet holes and the shaft refrigerant
outlet holes may be spaced with a predetermined angle therebetween
in a rotational direction of the shaft.
[0026] The shaft refrigerant inlet holes may be formed
substantially in a middle portion of the shaft and the shaft
refrigerant outlet holes are disposed at forward and rearward sides
from the shaft refrigerant inlet holes.
[0027] The shaft refrigerant inlet holes and the shaft refrigerant
outlet holes may be formed in plural number, respectively.
[0028] A first boss portion to which the shaft is axially coupled
is formed at a central portion of the body, and body refrigerant
outlet holes communicating with the shaft refrigerant outlet holes
and for discharging the refrigerant coming from the shaft to the
refrigerant compression space may be formed in a second boss
portion of the body, wherein the body refrigerant outlet holes are
formed in a direction inclined at a predetermined angle from a
longitudinal axis of the shaft toward the distal ends of the
body.
[0029] Front and rear surfaces of the refrigerant compression space
of the body may be respectively opened, and front and rear heads
for guiding the compressed refrigerant coming from the refrigerant
compression space to the outside are coupled to the opened front
and rear surfaces respectively, wherein discharge valves for
controlling discharge of the refrigerant are installed between the
refrigerant compression space and the front and rear heads.
[0030] A swash plate may be axially coupled to the shaft, and a
swash plate refrigerant inlet hole communicating with the shaft
refrigerant inlet holes is formed on the swash plate so as to guide
the refrigerant introduced into the body to the shaft, wherein the
shaft refrigerant inlet holes and the swash plate refrigerant inlet
hole are disposed on a straight line in the radial direction of the
shaft, wherein the swash plate includes a first boss portion
axially coupled to the shaft and a disc portion formed in a
circumferential direction of the first boss portion and disposed at
an inclination inside the body, and the swash plate refrigerant
inlet hole is formed in the first boss portion, and wherein a
piston for compressing the refrigerant in the refrigerant
compression space while moving back and forth according to rotation
of the shaft is coupled to the disc portion of the swash plate.
[0031] At least a portion of the shaft may be formed in a hollow
shape, of which one end is closed and an additional inlet hole for
guiding the refrigerant not introduced to the shaft refrigerant
inlet holes is formed at the other end of the shaft.
[0032] In another aspect of the present invention, a compressor of
a vehicle's cooling system may include a body having a body
refrigerant inlet hole formed therein to introduce a refrigerant
from the outside in a radial direction thereof, a shaft rotatably
disposed in the body and having shaft refrigerant inlet holes and
shaft refrigerant outlet holes, the shaft refrigerant inlet holes
for introducing the refrigerant introduced via the body refrigerant
inlet hole and the shaft refrigerant outlet holes for discharging
the refrigerant introduced to the inside of the shaft toward a
refrigerant compression space formed in the body in a radial
direction of the shaft, a swash plate axially coupled to the shaft
and having a swash plate refrigerant inlet hole communicating with
the shaft refrigerant inlet hole, a piston coupled to one side of
the swash plate and linearly reciprocating in the body during
rotation of the shaft, and front and rear heads respectively
installed on opened front and rear surfaces of the body and for
discharging the compressed refrigerant coming from the refrigerant
compression space to the outside.
[0033] A refrigerant flow path may be formed in the shaft so as to
move the refrigerant in an axial direction thereof.
[0034] Body refrigerant outlet holes communicating with the shaft
refrigerant outlet holes may be formed in the body for discharging
the refrigerant coming from the shaft to the refrigerant
compression space.
[0035] In various aspects of the present invention, the compressor
of the vehicle's cooling system according to the present invention
is configured such that an external refrigerant is introduced into
a shaft in a radial direction through a body, flows in the shaft in
an axial direction, and then is discharged to a refrigerant
compression space in the body, thereby shortening the flow path of
the refrigerant and minimizing flow path resistance. Since no
suction valves and suction chambers are required, the structure is
simplified and the cost is reduced.
[0036] The methods and apparatuses of the present invention have
other features and advantages which will be apparent from or are
set forth in more detail in the accompanying drawings, which are
incorporated herein, and the following Detailed Description of the
Invention, which together serve to explain certain principles of
the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0037] FIG. 1 is a cross sectional view showing a compressor of a
vehicle's cooling system according to the prior art.
[0038] FIG. 2 is a cross sectional view showing a compressor of a
vehicle's cooling system according to an exemplary embodiment of
the present invention.
[0039] FIG. 3 is a cutaway perspective view showing a compressor of
a vehicle's cooling system according to an exemplary embodiment of
the present invention.
[0040] FIG. 4 is a perspective view of a body shown in FIG. 3.
[0041] FIG. 5 is a perspective view of a swash plate shown in FIG.
3.
[0042] FIG. 6 is a perspective view of a shaft shown in FIG. 3.
[0043] It should be understood that the appended drawings are not
necessarily to scale, presenting a somewhat simplified
representation of various features illustrative of the basic
principles of the invention. The specific design features of the
present invention as disclosed herein, including, for example,
specific dimensions, orientations, locations, and shapes will be
determined in part by the particular intended application and use
environment.
[0044] In the figures, reference numbers refer to the same or
equivalent parts of the present invention throughout the several
figures of the drawing.
DETAILED DESCRIPTION OF THE INVENTION
[0045] Reference will now be made in detail to various embodiments
of the present invention(s), examples of which are illustrated in
the accompanying drawings and described below. While the
invention(s) will be described in conjunction with exemplary
embodiments, it will be understood that present description is not
intended to limit the invention(s) to those exemplary embodiments.
On the contrary, the invention(s) is/are intended to cover not only
the exemplary embodiments, but also various alternatives,
modifications, equivalents and other embodiments, which may be
included within the spirit and scope of the invention as defined by
the appended claims.
[0046] FIG. 2 is a cross sectional view showing a compressor of a
vehicle's cooling system according to an exemplary embodiment of
the present invention, FIG. 3 is a cutaway perspective view showing
a compressor of a vehicle's cooling system according to an
exemplary embodiment of the present invention, FIG. 4 is a
perspective view of a body shown in FIG. 3, FIG. 5 is a perspective
view of a swash plate shown in FIG. 3, and FIG. 6 is a perspective
view of a shaft shown in FIG. 3.
[0047] Referring to FIGS. 2 to 6, the compressor of the vehicle's
cooling system according to an exemplary embodiment of the present
invention comprises a body 50 forming a refrigerant compression
space 51 for compressing a refrigerant therein, a front head 60 and
a rear head 62 disposed respectively on the opened front and rear
surfaces of the body 50, a shaft 70 disposed to penetrate the body
50, a swash plate 80 axially coupled to the shaft 70, and a piston
90 coupled to one side of the swash plate 80.
[0048] The body 50 includes a manifold portion 55 having a suction
port 52 and a discharge port 54 for introducing and discharging a
refrigerant.
[0049] Furthermore, the body 50 has a body refrigerant inlet hole
56 formed such that the refrigerant introduced through the suction
port 52 is introduced in a radial direction to the shaft 70.
[0050] The refrigerant compression space 51 for compressing a
refrigerant by the piston 90 is formed in the body 50. The
refrigerant compression space 51 is disposed to be spaced apart
inward from the manifold portion 55. The refrigerant compression
space 51 is defined by the piston 90 and the front and rear heads
60 and 62.
[0051] The body 50 is formed so as to be opened at the front and
rear surfaces, the front surface of the body 50 is disposed to be
covered by the front head 60, and the rear surface of the body 50
is disposed to be covered by the rear head 62.
[0052] Discharge chambers 63 and 64 for discharging the refrigerant
compressed in the refrigerant compression space 51 are formed on
the front head 60 and the rear head 62, respectively. The discharge
chambers 63 and 64 are formed so as to communicate with the
manifold portion 55, and therefore the refrigerant discharged to
the discharge chambers 63 and 64 is discharged to the outside
through the discharge port 54 of the manifold portion 55.
[0053] A front discharge valve sheet 65 for controlling discharge
of the refrigerant compressed in the refrigerant compression space
51 is disposed between the front surface of the body 50 and the
front head 60. A front discharge valve 66 is provided on the front
discharge valve sheet 65.
[0054] A rear discharge valve sheet 67 is disposed between the rear
surface of the body 50 and the rear head 62. A rear discharge valve
68 is provided on the rear discharge valve sheet 67.
[0055] The front discharge valve 66 and the rear discharge valve 68
may be configured so as to be opened in a direction in which the
refrigerant is discharged by a discharge pressure of the
refrigerant.
[0056] In an exemplary embodiment of the present invention, because
the refrigerant introduced into the body 50 in the radial direction
is configured so as to be directly introduced to the shaft 70, all
of the suction chambers and suction valves of the prior art may be
omitted.
[0057] Referring to FIG. 2, the shaft 70 is formed such that the
refrigerant introduced to the body 50 is introduced thereinto in
the radial direction, flows therein in an axial direction, and then
exists in the radial direction toward the refrigerant compression
space 51. That is, a refrigerant flow path 71 is formed in the
shaft 70 so as to move the refrigerant in the axial direction. The
shaft 70 is opened at the rear end and formed in a hollow shape to
thus form the refrigerant flow path 71 therein.
[0058] Referring to FIGS. 2 to 6, shaft refrigerant inlet holes 72
and 73 are formed on the circumferential surface of the shaft 70 to
allow the refrigerant introduced into the body 50 to enter into the
shaft 70.
[0059] The shaft refrigerant inlet holes 72 and 73 may be formed in
plural number. The following description will be given of a case
where two shaft refrigerant inlet holes 72 and 73 are formed at
positions spaced apart at a predetermined angle along the
circumferential surface of the shaft 70.
[0060] Further, the rear end portion of the shaft 70 is opened, and
therefore has an additional inlet hole 74 through which the
refrigerant not introduced to the shaft refrigerant inlet holes 72
and 73, among the refrigerant in the body 50, can be introduced
into the shaft 70.
[0061] A guide groove portion 69 for guiding the refrigerant in the
body 50 to the additional inlet hole 74 may be formed on the rear
head 62.
[0062] Further, shaft refrigerant outlet holes 75, 76, and 77 for
discharging the refrigerant introduced to the inside and flowing in
an axial direction to the refrigerant compression space 51 are
formed on the circumferential surface of the shaft 70.
[0063] The shaft refrigerant outlet holes 75, 76, and 77 may be
formed in plural number. The following description will be given of
a case where the shaft refrigerant outlet holes 75, 76, and 77 are
disposed at front and rear sides with respect to the shaft
refrigerant inlet holes 72 and 73.
[0064] In addition, the shaft refrigerant outlet holes 75, 76, and
77 may be formed in plural number at positions spaced apart at a
predetermined angle along the circumferential direction at the
front and rear sides of the shaft 70. The shaft refrigerant outlet
holes 75, 76, and 77 may be formed in a slot shape.
[0065] Meanwhile, a second boss portion 57 to which the shaft 70 is
axially coupled is formed at a central portion of the body 50, and
body refrigerant outlet holes 58 and 59 communicating with the
shaft refrigerant outlet holes 75, 76, and 77 are formed in the
boss portion 57. The body refrigerant outlet holes 58 and 59 may be
respectively inclined at a predetermined angle toward the ends,
i.e, forward and backward, of the body 50.
[0066] The swash plate 80 is disposed at an inclination so as to
receive rotational force of the shaft 70 and reciprocate the piston
90.
[0067] The swash plate 80 comprises a first boss portion 81 axially
coupled to the shaft 70 and a disc portion 82 formed in a
circumferential direction of the first boss portion 81 and disposed
at an inclination inside the body 50.
[0068] The swash plate 80 has a swash plate refrigerant inlet hole
83 communicating with the shaft refrigerant inlet holes 72 and 73.
The swash plate refrigerant inlet hole 83 is formed in the first
boss portion 81, and communicates with the shaft refrigerant inlet
holes 72 and 73.
[0069] Since the swash plate refrigerant inlet hole 83, along with
the shaft refrigerant inlet holes 72 and 73, is disposed on a
straight line, flow path resistance can be minimized.
[0070] The flow of a refrigerant in the thus-constructed compressor
of the vehicle's cooling system according to an exemplary
embodiment of the present invention will be discussed below.
[0071] First, a refrigerant from the outside is introduced to the
manifold portion 55 via the body refrigerant inlet hole 56 in a
radial direction.
[0072] The refrigerant introduced into the body 50 sequentially
passes through the swash plate refrigerant inlet hole 83 and the
shaft refrigerant inlet holes 72 and 73, and enters into the shaft
70.
[0073] That is, a suction path of refrigerant is configured such
that a refrigerant sequentially passes through the body refrigerant
inlet hole 56, the swash plate refrigerant inlet hole 83, and the
shaft refrigerant inlet holes 72 and 73 and then enters into the
shaft 70.
[0074] Such a suction path of refrigerant is formed in a radial
direction perpendicular to an axial direction and is nearly a
straight line, and hence suction path resistance can be
minimized.
[0075] Further, since no suction chambers or suction valves are
required, the cost can be reduced.
[0076] Moreover, the refrigerant not passed through the shaft
refrigerant inlet holes 72 and 73, among the refrigerant introduced
to the body 50, may be introduced into the shaft 70 via the guide
groove portion 69 of the rear head 62 and the additional inlet hole
74 of the shaft 70.
[0077] Meanwhile, the refrigerant introduced into the shaft 70
flows forward and backward of the shaft 70. The refrigerant flowing
forward and backward of the shaft 70 sequentially passes through
the shaft refrigerant outlet holes 75, 76, and 77 and the body
refrigerant outlet holes 58 and 59, and then is released to the
refrigerant compression space 51 of the body 50.
[0078] The refrigerant released to the refrigerant compression
space 51 from the inside of the shaft 70 is compressed by the
reciprocation of the piston 90.
[0079] The refrigerant compressed in the refrigerant compression
space 51 passes through the discharge valves 66 and 68 and the
discharge chambers 63 and 64, and then is discharged through the
discharge port 54.
[0080] Accordingly, with the above-described configuration of the
refrigerant flow path, suction valves and suction chambers can be
omitted, and flow path resistance can be minimized, thereby
improving compression efficiency and performance.
[0081] For convenience in explanation and accurate definition in
the appended claims, the terms "front", "rear", "inside", "inner",
and "outer" are used to describe features of the exemplary
embodiments with reference to the positions of such features as
displayed in the figures.
[0082] The foregoing descriptions of specific exemplary embodiments
of the present invention have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described in order to explain certain principles of
the invention and their practical application, to thereby enable
others skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the invention be defined by the Claims appended hereto and
their equivalents.
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