U.S. patent application number 10/600018 was filed with the patent office on 2004-10-28 for hermetic compressor.
This patent application is currently assigned to SAMSUNG GWANG JU ELECTRONICS CO., LTD. Invention is credited to Kim, Jeong Hyun.
Application Number | 20040213681 10/600018 |
Document ID | / |
Family ID | 33297329 |
Filed Date | 2004-10-28 |
United States Patent
Application |
20040213681 |
Kind Code |
A1 |
Kim, Jeong Hyun |
October 28, 2004 |
Hermetic compressor
Abstract
A hermetic compressor, in which an exhaust chamber part having
an exhaust chamber therein is provided at a cylinder head, in place
of a cylinder block, thus preventing deformation of the cylinder
block and preventing a reduction in volume efficiency of gas. The
exhaust chamber part has a chamber body integrally formed at the
cylinder head, and a chamber cover to cover an open top of the
chamber body. The chamber body has two bored cylindrical parts
which are arranged in parallel to each other and integrally coupled
to each other such that an exhaust chamber of the chamber part is
divided into first and second chambers communicating with each
other. The chamber cover has two dome-shaped parts which are
arranged in parallel to each other and integrally coupled to each
other so as to correspond to a shape of the chamber body. A first
boss having a first bolt hole and a second boss having a second
bolt hole are projected toward the chamber cover in the first and
second chambers of the chamber body, respectively, and first and
second through holes are formed in the chamber cover at positions
corresponding to the first and second bolt holes, respectively, so
that the chamber cover is mounted to the chamber body by use of
bolts which are respectively tightened to the first and second bolt
holes while passing through the first and second through holes.
Inventors: |
Kim, Jeong Hyun;
(Kwangju-City, KR) |
Correspondence
Address: |
Ladas & Parry
26 West 61st Street
New York
NY
10023
US
|
Assignee: |
SAMSUNG GWANG JU ELECTRONICS CO.,
LTD
|
Family ID: |
33297329 |
Appl. No.: |
10/600018 |
Filed: |
June 20, 2003 |
Current U.S.
Class: |
417/312 |
Current CPC
Class: |
F04B 39/0072 20130101;
F04B 39/125 20130101 |
Class at
Publication: |
417/312 |
International
Class: |
F04B 039/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 22, 2003 |
KR |
10-2003-25567 |
Claims
What is claimed is:
1. A hermetic compressor, comprising: a casing; a cylinder block
installed in the casing, with a cylinder bore defined in the
cylinder block; a piston placed in the cylinder bore so as to
reciprocate in the cylinder bore; a cylinder head mounted to an end
of the cylinder block so as to cover the cylinder bore; and an
exhaust chamber part provided at the cylinder head so as to
temporarily store compressed gas discharged from the cylinder bore,
and exhaust the compressed gas to an outside of the casing.
2. The hermetic compressor according to claim 1, wherein the
exhaust chamber part comprises: a chamber body integrally formed at
a side of the cylinder head, the chamber body being open at a top
thereof to define an exhaust chamber therein; and a chamber cover
to cover the open top of the chamber body.
3. The hermetic compressor according to claim 2, wherein the
chamber body and the chamber cover of the exhaust chamber part are
provided with at least one bolt hole and at least one through hole,
respectively, so that the chamber cover is mounted to the chamber
body by use of a bolt which is tightened to the bolt hole while
passing through the through hole.
4. The hermetic compressor according to claim 2, wherein the
chamber body comprises two bored cylindrical parts which are
arranged in parallel to each other and integrally coupled to each
other such that the exhaust chamber is divided into first and
second chambers communicating with each other, and the chamber
cover comprises two dome-shaped parts which are arranged in
parallel to each other and integrally coupled to each other so as
to correspond to a shape of the chamber body.
5. The hermetic compressor according to claim 4, wherein an exhaust
pipe is provided at the chamber body at a position between the
first and second chambers, thus exhausting the compressed gas from
the first and second chambers to the outside of the casing.
6. The hermetic compressor according to claim 4, wherein a first
boss having a first bolt hole and a second boss having a second
bolt hole are projected toward the chamber cover in the first and
second chambers of the chamber body, respectively, and first and
second through holes are formed in the chamber cover at positions
corresponding to the first and second bolt holes, respectively, so
that the chamber cover is mounted to the chamber body by use of
bolts which are respectively tightened to the first and second bolt
holes while passing through the first and second through holes.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of Korean Application
No. 2003-25567, filed Apr. 22, 2003, in the Korean Intellectual
Property Office, the disclosure of which is incorporated herein by
reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates, in general, to hermetic
compressors and, more particularly, to a hermetic compressor, in
which an exhaust chamber part to temporarily store therein
compressed gas discharged from a cylinder bore prior to exhausting
the compressed gas to an outside of a hermetic casing of the
compressor, is provided at a cylinder head, in place of a cylinder
block, thus preventing deformation of the cylinder block and
allowing easy and simple production of the cylinder block.
[0004] 2. Description of the Related Art
[0005] As well known to those skilled in the art, hermetic
compressors typically have a compression unit to compress inlet
gas, a drive unit to operate the compression unit, and a hermetic
casing to hermetically house the compression unit and the drive
unit therein. The hermetic compressors suck the gas into the
hermetic casing, and compress the gas, prior to discharging the
compressed gas to an outside of the hermetic casing. The hermetic
compressors are typically used in refrigeration circuits of a
variety of refrigeration systems, such as air conditioners and
refrigerators, so as to compress low-pressure gas refrigerant
returned from an evaporator of the refrigeration circuit, thus
producing high-pressure gas refrigerant and discharging the
high-pressure gas refrigerant to a condenser of the refrigeration
circuit.
[0006] In the hermetic compressors, the compression unit includes a
cylinder block and a piston, while the drive unit includes a stator
and a rotor. Examples of the hermetic compressors are hermetic
linear compressors and hermetic reciprocating compressors. In a
conventional hermetic linear compressor, a piston to which a rotor
of a drive unit is mounted performs a rectilinear reciprocating
action to compress the gas. In a conventional hermetic
reciprocating compressor, a rotating shaft penetrates a rotor of a
drive unit and is connected to a piston, so that the piston
performs a rectilinear reciprocating action in response to a
rotating action of the rotating shaft, thus compressing the
gas.
[0007] In the conventional hermetic compressors, a cylinder block
defines an axial cylinder bore therein. The cylinder bore of the
cylinder block receives the piston therein, and defines a space
therein to compress the gas. A cylinder head is mounted to an upper
end of the cylinder block to cover the cylinder bore.
[0008] The cylinder block, to which the cylinder head is mounted,
is provided with an exhaust chamber part to temporarily store
therein the compressed gas discharged from the cylinder bore, prior
to exhausting the compressed gas to an outside of the hermetic
casing of the compressor. The exhaust chamber part has a chamber
body which is covered with a chamber cover to define a
predetermined exhaust chamber therein.
[0009] However, the conventional hermetic compressors having the
above-mentioned construction is problematic, as follows. That is,
the exhaust chamber part is formed in the cylinder block, thus
complicating the structure of the cylinder block and making it
difficult to produce the cylinder block. In addition, it is
necessary to lock the chamber cover to the chamber body by
tightening a plurality of bolts with high torque to accomplish an
airtight sealing effect at a junction between the chamber cover and
the chamber body. However, the high-torque locking of the chamber
cover to the chamber body of the exhaust chamber part by use of the
bolts may cause a deformation of the cylinder block, and, sometimes
cause damage or breakage of the cylinder block.
[0010] Particularly, it is necessary to precisely arrange the
piston in the cylinder bore of the cylinder block with a minute
clearance defined between the piston and the cylinder bore.
However, when the cylinder bore is deformed during a process of
bolting the chamber cover to the chamber body of the exhaust
chamber part with the high torque, it is almost impossible to
precisely arrange the piston in the cylinder bore with the desired
minute clearance defined between the piston and the cylinder bore.
In such a case, the gas may leak in the cylinder bore through a
junction between the piston and the cylinder bore, or the piston
may be locked to an inner surface of the cylinder bore. When the
piston is locked to the inner surface of the cylinder bore, the
piston cannot perform a reciprocating action in the cylinder
bore.
[0011] Furthermore, since the high-pressure and high-temperature
gas is temporarily stored in the exhaust chamber part of the
conventional hermetic compressors, the cylinder block integrated
with the exhaust chamber part is heated by the high-pressure and
high-temperature gas to a high temperature, thus increasing the
temperature of the inlet gas which flows into the cylinder bore. In
such a case, the inlet gas is reduced in volume efficiency thereof,
and the hermetic compressor is reduced in gas compression
efficiency thereof.
SUMMARY OF THE INVENTION
[0012] Accordingly, it is an aspect of the present invention to
provide a hermetic compressor, in which an exhaust chamber part is
placed at a position free from causing deformation of a cylinder
block, and which allows easy and simple production of the cylinder
block, without causing a reduction in volume efficiency of inlet
gas sucked into the cylinder bore.
[0013] Additional aspects and advantages of the invention will be
set forth in part in the description which follows and, in part,
will be obvious from the description, or may be learned by practice
of the invention.
[0014] The foregoing and other aspects of the present invention are
achieved by providing a hermetic compressor, including: a casing; a
cylinder block installed in the casing, with a cylinder bore
defined in the cylinder block; a piston placed in the cylinder bore
so as to reciprocate in the cylinder bore; a cylinder head mounted
to an end of the cylinder block so as to cover the cylinder bore;
and an exhaust chamber part provided at the cylinder head so as to
temporarily store compressed gas discharged from the cylinder bore,
and exhaust the compressed gas to an outside of the casing.
[0015] The exhaust chamber part includes a chamber body integrally
formed at a side of the cylinder head, the chamber body being open
at a top thereof to define an exhaust chamber therein; and a
chamber cover to cover the open top of the chamber body.
[0016] The chamber body includes two bored cylindrical parts which
are arranged in parallel to each other and integrally coupled to
each other such that the exhaust chamber is divided into first and
second chambers communicating with each other, and the chamber
cover includes two dome-shaped parts which are arranged in parallel
to each other and integrally coupled to each other so as to
correspond to a shape of the chamber body.
[0017] In the hermetic compressor, an exhaust pipe is provided at
the chamber body at a position between the first and second
chambers, thus exhausting the compressed gas from the first and
second chambers to the outside of the casing.
[0018] In the hermetic compressor, a first boss having a first bolt
hole and a second boss having a second bolt hole are projected
toward the chamber cover in the first and second chambers of the
chamber body, respectively, and first and second through holes are
formed in the chamber cover at positions corresponding to the first
and second bolt holes, respectively, so that the chamber cover is
mounted to the chamber body by use of bolts which are respectively
tightened to the first and second bolt holes while passing through
the first and second through holes.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] These and other aspects and advantages of the invention will
become apparent and more readily appreciated from the following
description of the preferred embodiments, taken in conjunction with
the accompanying drawings of which:
[0020] FIG. 1 is a longitudinal sectioned view of a hermetic
compressor, according to an embodiment of the present
invention;
[0021] FIG. 2 is an exploded perspective view of a part of the
hermetic compressor of FIG. 1 to show a cylinder head integrally
provided with an exhaust chamber part, when the cylinder head is
disassembled from a cylinder block; and
[0022] FIG. 3 is a perspective view of the part of the hermetic
compressor of FIG. 1 to show the cylinder head completely assembled
with the cylinder block.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0023] Reference will now be made in detail to the present
preferred embodiments of the present invention, examples of which
are illustrated in the accompanying drawings, wherein like
reference numerals refer to like elements throughout.
[0024] FIG. 1 is a longitudinal sectioned view of a hermetic
compressor, according to an embodiment of the present invention. As
shown in the drawing, the hermetic compressor according to the
present invention has a hermetic casing 1 that hermetically houses
a drive unit 10 and a compression unit 20 therein. The hermetic
compressor thus sucks and compresses gas, such as a gas refrigerant
circulating through a refrigeration circuit of a refrigeration
system, prior to discharging the compressed gas to an outside of
the hermetic casing 1.
[0025] In the hermetic compressor, the compression unit 20 includes
a cylinder block 1, a cylinder head 23, a piston 24, a frame 25, a
plurality of spacers 26, a resonant spring 27, and a movable member
28. The cylinder block 21 defines an axial cylinder bore 22
therein, and the gas is compressed in the cylinder bore 22. The
cylinder head 23 is mounted to an upper end of the cylinder block
21 to cover the cylinder bore 22. The piston 24 is placed in the
cylinder bore 22 such that the piston 24 reciprocates in an axial
direction to compress the gas in the cylinder bore 22. The frame 25
and the plurality of spacers 26 are mounted to a lower end of the
cylinder block 21, while the resonant spring 27 is horizontally
mounted to lower ends of the spacers 26. The movable member 28
connects the piston 24 to the resonant spring 27. A suction muffler
29 and an exhaust chamber part 40 are provided at both sides of the
cylinder head 23, respectively. A suction valve 30 and an exhaust
valve 31 are provided in the cylinder head 23.
[0026] The drive unit 10 includes first and second stators 11 and
12, a coil 13, and a permanent magnet 14. The first and second
stators 11 and 12 are concentrically mounted around an outer
surface of the cylinder block 21, with a gap defined between the
first and second stators 11 and 12. The coil 13 is wound in an
interior of the first stator 11. The permanent magnet 14 is
installed on the movable member 28 which extends into the gap
defined between the first and second stators 11 and 12, such that
the permanent magnet 14 is moved along with both the piston 24 and
the movable member 28.
[0027] The drive unit 10 and the compression unit 20 are supported
in the hermetic casing 1 while being suspended by a plurality of
coil springs 2. When electric power is applied to the coil 13
during an operation of the hermetic compressor, an electromagnetic
field is generated along the first and second stators 11 and 12, so
that the permanent magnet 14 linearly reciprocates in a vertical
direction due to the electromagnetic field. Therefore, both the
movable member 28 and the piston 24 reciprocate in the vertical
direction. In such a case, the reciprocating action of the piston
24 is enhanced by a resonance of the resonant spring 27.
[0028] During the reciprocating action of the piston 24, the
suction valve 30 and the exhaust valve 31 are alternately opened.
Therefore, gas is sucked into the cylinder bore 22 through the
suction muffler 29 so as to be compressed, and is discharged from
the cylinder bore 22 to the exhaust chamber part 40.
[0029] An arrangement of the exhaust chamber part of the hermetic
compressor according to the present invention will be described in
detail herein below, with reference to FIGS. 2 and 3.
[0030] FIG. 2 is perspective views of a part of the hermetic
compressor of the present invention, in which FIG. 2 shows the
cylinder head when the cylinder head having the exhaust chamber
part is disassembled from the cylinder block, and FIG. 3 shows the
cylinder head completely assembled with the cylinder block.
[0031] As shown in FIG. 2, the exhaust chamber part 40 is
integrally provided at a first side of the cylinder head 23 which
covers the cylinder bore 22 at the upper end of the cylinder block
21. The suction muffler 29 is provided at a second side of the
cylinder head 23, which is opposite to the first side of the
cylinder head 23 having the exhaust chamber part 40. Due to the
suction muffler 29 of the cylinder head 23, the gas is introduced
into the cylinder bore 22 through the cylinder head 23. The gas is
compressed in the cylinder bore 22, and the compressed gas is
discharged from the cylinder bore 22 to the exhaust chamber part
40.
[0032] The exhaust chamber part 40 has a chamber body 41 and a
chamber cover 42. The chamber body 41 defining an exhaust chamber
therein has two bored cylindrical parts which are each open at a
top thereof and are arranged in parallel to each other while being
coupled to each other. The chamber body 41 having the
above-described structure is integrally formed at the cylinder head
23. The chamber cover 42 is mounted to the open top of the chamber
body 41 to cover the open top of the chamber body 41.
[0033] Therefore, the chamber body 41 has therein first and second
chambers 43 and 44 which communicate with each other and
temporarily store the compressed gas therein. The chamber cover 42,
which covers the open top of the chamber body 41, has two
dome-shaped parts which are arranged in parallel to each other
while being coupled to each other so as to correspond to the shape
of the chamber body 41.
[0034] First and second exhaust ports 45 and 46 are formed in the
cylinder head 23 at positions corresponding to the first and second
chambers 43 and 44, respectively, so as to guide the compressed gas
from the cylinder head 23 into the first and second chambers 43 and
44. An exhaust pipe 47 is formed at the chamber body 41 at a
position between the first and second chambers 43 and 44, thus
exhausting the compressed gas from the first and second chambers 43
and 44 to the outside of the casing 1.
[0035] In order to mount the chamber cover 42 to the open top of
the chamber body 41 integrally formed at the cylinder head 23 by
use of a plurality of bolts 54, first and second bosses 48 and 50
are projected from a bottom of the chamber body 41 toward the
chamber cover 42 in the first and second chambers 43 and 44 of the
chamber body 41, respectively.
[0036] The first boss 48 has a first axial bolt hole 49, while the
second boss 50 has a second axial bolt hole 51. The chamber cover
42 has first and second through holes 52 and 53 at positions
corresponding to the first and second bolt holes 49 and 51,
respectively.
[0037] Therefore, when the bolts 54 are tightened to the first and
second bolt holes 49 and 51 through the first and second through
holes 52 and 53 with an appropriate torque, the chamber cover 42 is
easily and simply mounted to the chamber body 41 as shown in FIG.
3. The process of bolting the chamber cover 42 to the chamber body
41 is performed with having no relation to the cylinder block 21,
thus not deforming, damaging or breaking the cylinder block 21.
[0038] In the above-described embodiment, the present invention is
adapted to a hermetic linear compressor. However, it should be
understood that the present invention may be adapted to a hermetic
reciprocating compressor, in addition to the hermetic linear
compressor, without affecting the functioning of the present
invention.
[0039] As apparent from the above description, the present
invention provides a hermetic compressor, in which an exhaust
chamber part to temporarily store therein compressed gas discharged
from a cylinder bore prior to exhausting the compressed gas to an
outside of a hermetic casing, is integrally formed at a cylinder
head, in place of a cylinder block. It is thus possible to simplify
the structure of the cylinder block, so that the cylinder block is
easily and simply produced.
[0040] In addition, a process of bolting a chamber cover to an open
top of a chamber body of the exhaust chamber part is performed with
having no relation to the cylinder block, so that the process is
free from deforming, damaging or breaking the cylinder block. It is
thus possible to precisely arrange a piston in the cylinder bore of
the cylinder block with a minute clearance defined between the
piston and the cylinder bore, so that gas leakage from a junction
between the piston and the cylinder bore is prevented, and gas
compression efficiency of the hermetic compressor is improved.
[0041] Furthermore, since the exhaust chamber part of the present
invention is provided at the cylinder head, in place of the
cylinder block, heat of the compressed gas temporarily stored in
the exhaust chamber part is scarcely transmitted to the cylinder
block. Therefore, a temperature of inlet gas which flows into the
cylinder bore is not increased due to the cylinder block, so that
volume efficiency of the inlet gas and gas compression efficiency
of the hermetic compressor are improved.
[0042] Although a preferred embodiment of the present invention has
been shown and described, it would be appreciated by those skilled
in the art that changes may be made in these embodiments without
departing from the principles and spirit of the invention, the
scope of which is defined in the claims and their equivalents.
* * * * *