U.S. patent application number 11/808155 was filed with the patent office on 2008-01-03 for hermetic type compressor.
This patent application is currently assigned to Samsung Gwangju Electronics Co., Ltd.. Invention is credited to Jung Hyoun Kim.
Application Number | 20080003115 11/808155 |
Document ID | / |
Family ID | 38876851 |
Filed Date | 2008-01-03 |
United States Patent
Application |
20080003115 |
Kind Code |
A1 |
Kim; Jung Hyoun |
January 3, 2008 |
Hermetic type compressor
Abstract
A hermetic type compressor to prevent refrigerant from flowing
backwardly from a compression chamber into a suction muffler. The
compressor includes a sealed casing, a compression chamber to
compress refrigerant guided into the sealed casing, a compression
chamber provided to compress the refrigerant guided into the sealed
casing through the suction pipe, a suction muffler provided between
the compression chamber and the suction pipe to reduce the noise
emissions of the refrigerant being suctioned into the compression
chamber, and a check valve installed on an outlet of the suction
muffler to prevent the refrigerant in the suction muffler from
flowing backwardly from the compression chamber into the suction
muffler.
Inventors: |
Kim; Jung Hyoun; (Gwangju,
KR) |
Correspondence
Address: |
BLANK ROME LLP
600 NEW HAMPSHIRE AVENUE, N.W.
WASHINGTON
DC
20037
US
|
Assignee: |
Samsung Gwangju Electronics Co.,
Ltd.
Gwangju-city
KR
|
Family ID: |
38876851 |
Appl. No.: |
11/808155 |
Filed: |
June 7, 2007 |
Current U.S.
Class: |
417/312 |
Current CPC
Class: |
F04B 39/0055 20130101;
F04B 39/1073 20130101 |
Class at
Publication: |
417/312 |
International
Class: |
F04B 37/00 20060101
F04B037/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 28, 2006 |
KR |
2006-58974 |
Claims
1. A hermetic type compressor comprising: a sealed casing; a
compression chamber positioned in the sealed casing for compressing
a refrigerant; a refrigerant suctioning chamber in fluid
communication with the compression chamber, for suctioning the
refrigerant into the compression chamber; a suction muffler
connected to the refrigerant suctioning chamber for reducing noise
emissions from the refrigerant being suctioned into the compression
chamber; and a check valve installed between the refrigerant
suctioning chamber and a resonance space formed in the suction
muffler for preventing the refrigerant from flowing backward from
the compression chamber into the resonance space.
2. The hermetic type compressor according to claim 1, wherein the
check valve comprises: a reed valve adapted to open and close in
the connecting path between the refrigerant suctioning chamber and
the resonance space; and a stopper to restrict the movement of the
reed valve such that the reed valve is opened only in a refrigerant
fluid flow direction while the refrigerant enters the compression
chamber.
3. The hermetic type compressor according to claim 2, wherein the
reed valve comprises a fixing protrusion and the connecting path
has a fixing groove to accommodate the fixing protrusion, wherein
the reed valve is installed in the connecting path.
4. The hermetic type compressor according to claim 1, wherein the
suction muffler comprises a guide pipe formed with the connecting
path therein, and wherein the guide pipe comprises: a first guide
pipe portion including a first extension extended into the
resonance space and a second extension extended out of the
resonance space; and a second guide pipe portion detachably coupled
with the second extension of the first guide pipe portion.
5. The hermetic type compressor according to claim 4, wherein one
of the first guide pipe and the second guide pipe portions is
formed with a male thread, and the other of the first guide pipe
and the second guide pipe portions is formed with a female thread
such that the first guide pipe is adapted to being coupled with the
second guide pipe.
6. A hermetic type compressor comprising: a sealed casing; a
suction pipe to guide a refrigerant out of and into the sealed
casing; a compression chamber adapted to compressing the
refrigerant guided into the sealed casing through the suction pipe;
a suction muffler provided between the compression chamber and the
suction pipe to reduce noise emissions from the refrigerant being
suctioned into the compression chamber; and a check valve installed
proximate an outlet of the suction muffler to prevent the
refrigerant in the suction muffler from flowing backwardly from the
compression chamber into the suction muffler.
7. The hermetic type compressor according to claim 6, wherein the
check valve comprises: a reed valve adapted to open and close the
outlet of the suction muffler; and a stopper to restrict the
movement of the reed valve such that the reed valve is opened only
in a refrigerant fluid flow direction while the refrigerant enters
to the compression chamber.
8. The hermetic type compressor according to claim 6, wherein the
suction muffler comprises a resonance space formed therein and a
guide pipe forming a connecting path between the resonance space
and the compression chamber, the guide pipe comprising: a first
guide pipe portion including a first extension extended into the
resonance space and a second extension extended out of the
resonance space; and a second guide pipe portion detachably coupled
with the second extension of the first guide pipe portion.
9. The hermetic type compressor according to claim 8, wherein the
check valve is installed proximate the second extension.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of Korean Patent
Application No. 2006-58974, filed on Jun. 28, 2006, 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 to a hermetic type compressor,
and more particularly to a hermetic type compressor in which
refrigerant in a compression chamber is prevented from flowing
backward during the operation of the hermetic type compressor.
[0004] 2. Description of the Related Art
[0005] Generally, a hermetic type compressor is employed to
compress refrigerant in a refrigerating cycle used in a
refrigerator, an air conditioner, and the like, and includes a
sealed casing to form an external appearance, a compression device
provided in the sealed casing to compress refrigerant, and a
driving unit to supply a driving force to the compression
device.
[0006] Through the sides of the sealed casing, a suction pipe is
used to guide a low-pressure refrigerant passing through an
evaporator of the refrigerating cycle into the sealed casing, and a
discharge pipe is used to guide a high-pressure refrigerant
compressed in the sealed casing to a condenser.
[0007] The compression device includes a valve device, including a
cylinder to form the compression chamber in which the refrigerant
is compressed, a piston linearly reciprocating within the
compression chamber to compress the refrigerant, a cylinder head
coupled to a side of the cylinder in which a refrigerant suctioning
chamber and a refrigerant discharging chamber are partitioned, a
suction valve disposed between the cylinder and the cylinder head
to intermit the refrigerant to be suctioned from a refrigerant
suctioning chamber into the compression chamber, and a discharge
valve to intermit the refrigerant discharged from the compression
chamber into a refrigerant discharging chamber.
[0008] A suction muffler is installed on a refrigerant suctioning
chamber side of the cylinder head, to reduced noise emissions from
the refrigerant being suctioned into the compression chamber.
[0009] In the above-described hermetic type compressor, when the
driving unit is driven, the piston in the compression chamber
reciprocates linearly to generate a pressure difference between the
inside and the outside of the compression chamber.
[0010] Due to the pressure difference, the low-pressure refrigerant
passing through the evaporator passes through the suction pipe, the
suction muffler, and the refrigerant suctioning chamber and is
suctioned into the compression chamber to be compressed, and the
high-pressure refrigerant compressed in and discharged from the
compression chamber is supplied to the condenser via the
refrigerant discharging chamber and the discharge pipe.
[0011] In the conventional hermetic type compressor, although a
majority of refrigerant compressed in the compression chamber in a
compression cycle of the hermetic type compressor is discharged
into the discharging chamber through the discharge valve, some of
the refrigerant in the compression chamber is discharged through
the suction valve before the suction valve is closed when the
piston moves from the bottom dead center to the top dead center and
begins to compress the refrigerant. The refrigerant discharged
through the suction valve reaches the suction muffler to vibrate in
a resonance space formed in the suction muffler, and to vibrate
also in an inner space of the sealed casing, resulting in low
frequency noise.
[0012] Moreover, since the quantity of the refrigerant discharged
from the compression chamber to the condenser becomes small as much
as the refrigerant discharged to the suction muffler through the
suction valve, the compressing capacity of the compressor
deteriorates and overall refrigerating capacity of the
refrigerating cycle also deteriorates.
SUMMARY OF THE INVENTION
[0013] The present invention has been made in view of the
above-mentioned problems. An aspect of the invention is to provide
a hermetic type compressor in which refrigerant is prevented from
flowing from a compression chamber to a suction muffler to reduce
noise generated from the compressor and to prevent the
deterioration of compressing capacity.
[0014] In accordance with one embodiment of the invention, the
present invention provides a hermetic type compressor having a
sealed casing; a compression chamber to compress refrigerant guided
into the sealed casing; a refrigerant suctioning chamber
communicated with the compression chamber such that the refrigerant
is suctioned into the compression chamber; a suction muffler
connected to the refrigerant suctioning chamber to reduce noise
emissions from the refrigerant being suctioned into the compression
chamber; and a check valve installed on a connecting path
connecting the refrigerant suctioning chamber to a resonance space
formed in the suction muffler to prevent the refrigerant from
flowing backward from the compression chamber into the resonance
space.
[0015] The check valve includes a reed valve to open and close the
connecting path; and a stopper to restrict the movement of the reed
valve such that the reed valve is opened only in a direction where
the refrigerant enters the compression chamber.
[0016] The reed valve includes a fixing protrusion, and the
connecting path has a fixing groove to accommodate the fixing
protrusion such that the reed valve is installed on the connecting
path.
[0017] The suction muffler includes a guide pipe formed with the
connecting path therein, and the guide pipe comprises a first guide
pipe including a first extension extended into the resonance space,
and a second extension extended out of the resonance space; and a
second guide pipe detachably coupled with the second extension of
the first guide pipe.
[0018] Either the first guide pipe or the second guide pipe is
formed with a male thread, and the other of the first guide pipe or
the second guide pipe is formed with a female thread such that the
first guide pipe is coupled with the second guide pipe.
[0019] In accordance with another embodiment of the invention, the
present invention provides a hermetic type compressor including a
sealed casing; a suction pipe to guide refrigerant out of the
sealed casing into the sealed casing; a compression chamber
provided to compress the refrigerant guided into the sealed casing
through the suction pipe; a suction muffler provided between the
compression chamber and the suction pipe to reduce noise emissions
from the refrigerant being suctioned into the compression chamber;
and a check valve installed to an outlet of the suction muffler to
prevent the refrigerant in the suction muffler from flowing
backwardly from the compression chamber into the suction
muffler.
[0020] The check valve includes a reed valve to open and close the
outlet of the suction muffler; and a stopper to restrict the
movement of the reed valve such that the reed valve is opened only
in a direction where the refrigerant enters the compression
chamber.
[0021] The suction muffler includes a resonance space formed
therein, and a guide pipe to form a connecting path to connect the
resonance space to the compression chamber. The guide pipe includes
a first guide pipe including a first extension extended into the
resonance space and a second extension extended out of the
resonance space. A second guide pipe is detachably coupled with the
second extension of the first guide pipe.
[0022] The check valve is installed on the second extension.
[0023] Additional aspects and/or advantages of the invention will
be set forth in part in the description which follows and, in part,
will be apparent from the description, or may be learned by
practice of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Those and/or other aspects and advantages of the invention
will become apparent and more readily appreciated from the
following description of the embodiments, taken in conjunction with
the accompanying drawings in which:
[0025] FIG. 1 is a sectional view drawing illustrating a hermetic
type compressor according to an embodiment of the present
invention;
[0026] FIG. 2 is an exploded perspective view drawing illustrating
a suction muffler installed to the hermetic type compressor in FIG.
1;
[0027] FIG. 3 is a sectional view drawing illustrating the suction
muffler in FIG. 2 before being assembled; and
[0028] FIG. 4 is a sectional view drawing illustrating an assembly
of the suction muffler in FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0029] Hereinafter, a hermetic type compressor according to the
embodiments of the present invention will be described in detail
with reference to the accompanying drawings.
[0030] A hermetic type compressor according to an embodiment of the
present invention, as illustrated in FIG. 1, includes a sealed
casing 10 formed by coupling an upper casing 10a with a lower
casing 10b, a compressing device 20 disposed in the sealed casing
to compress refrigerant, and a driving unit 30 to supply a driving
force to the compressing device 20.
[0031] Through the sides of the sealed casing 10, a suction pipe 11
is used to guide a low-pressure refrigerant passing through an
evaporator of the refrigerating cycle into the sealed casing 10,
and a discharge pipe 12 is used to guide a high-pressure
refrigerant compressed in the sealed casing 10 by the compression
device 20 to a condenser.
[0032] The compression device 20 includes a valve device including
a cylinder 21 integrated with a frame 40 to form the compression
chamber 21a in which the refrigerant is compressed. A piston 22 is
used to linearly reciprocate within the compression chamber 21a. A
cylinder head 23 is coupled with a side of the cylinder 21 to seal
the compression chamber 21a. A refrigerant discharging chamber 23b
is in fluid communication with the discharge pipe 12. A refrigerant
suctioning chamber 23a is in fluid communication with the suction
pipe 11. A suction valve 24a is disposed between the cylinder 21
and the cylinder head 23 to intermit the refrigerant to be
suctioned from a refrigerant suctioning chamber 23a into the
compression chamber 21a. A discharge valve 24b is used to intermit
the refrigerant discharged from the compression chamber 21a into a
refrigerant discharging chamber 23b.
[0033] The driving unit 30 supplies a driving force to the piston
22 to linearly reciprocate within the compression chamber 21a, and
includes a stator 31 fixed to a lower outer side of the frame 40, a
rotor 32 disposed in the stator 31 to rotate due to electromagnetic
interaction with the stator 31, and a rotation shaft 33 fitted into
the central portion of the rotor 32 to rotate with the rotor
32.
[0034] The upper side of the rotation shaft 33 penetrates a hollow
part formed in the central area of the frame 40 and extends upward.
A top end of the rotation shaft 33 extends over the frame 40 to
form an eccentric part 33a that eccentrically rotates during the
rotation of the rotation shaft 33. A connecting rod 25 is installed
between the eccentric part 33a and the piston 22 to convert the
eccentric rotation of the eccentric part 33a to linear
reciprocating movement of the piston 22.
[0035] In the hermetic type compressor, the rotor 32 rotates with
the rotation shaft 33 due to the electromagnetic interaction
between the stator 31 and the rotor 32. The piston 22 connected to
the eccentric part 33a of the rotation shaft 33 through the
connecting rod 25 linearly reciprocates within the compression
chamber 21a. As such, when the piston 22 reciprocates within the
compression chamber 21a linearly, a pressure difference between the
inside and the outside of the compression chamber 21a occurs. Due
to the pressure difference, the low-pressure refrigerant passing
through the evaporator of the refrigerating cycle is suctioned into
the compression chamber 21a via the suction pipe 11 and the
refrigerant suctioning chamber 23a, and the high-pressure
refrigerant suctioned into and compressed in the compression
chamber 21a is supplied to the condenser of the refrigerating cycle
via the refrigerant discharging chamber 23b and the discharge pipe
12.
[0036] Meanwhile, a suction muffler 50 is installed between the
suction pipe 11 and the cylinder head 23 to reduce noise emissions
from the refrigerant being suctioned into the compression chamber
21a.
[0037] The suction muffler 40, as illustrated in FIGS. 2 to 4, is
formed by coupling a first body 60, which is in fluid communication
with the compression chamber 21a, with a second body 70, which is
in fluid communication with the suction pipe 11.
[0038] Between the first and second bodies 60 and 70, a first
coupling part 61 is formed along a lower edge of the first body 60,
and having a protrusion shape. Corresponding to this shape is a
second coupling part 71 formed along upper top of the second body
70, and having a groove shape to be engaged with the first coupling
part 61.
[0039] The first and second bodies 60 and 70 are fabricated by
injection molding, and the first and second bodies 60 and 70 are
coupled with each other to form a single resonance space 50a
therein.
[0040] The first body 60 includes an opened lower side, and a guide
pipe 62 formed at the central area thereof to guide the refrigerant
entering the resonance space 50a to the refrigerant suctioning
chamber 23a. A lower end of the guide pipe 62 extends into the
resonance space 50a by a predetermined length. An upper top of the
guide pipe 62 extends to an outer side of the resonance space 50a
to be inserted into the refrigerant suctioning chamber 23a of the
cylinder head 23. An outlet 62c of the suction muffler 50 is formed
at an upper end of the guide pipe 61.
[0041] The second body 70 includes an opened upper side a pipe
inserting part 72 formed at an outer side of the second body 70 to
form an inlet 71a of the suction muffler 50 by communicating the
inside and the outside of the resonance space 50a with each
other.
[0042] Between the pipe inserting part 72 and the suction pipe 11,
a coil spring 75 is installed to guide the refrigerant of the
suction pipe 11 directly to the resonance space 50a. An end of the
coil spring 75 is inserted into the pipe inserting part 72 by a
predetermined length, and an outlet end of the suction pipe 11 is
inserted into the opposite end of the coil spring 75 by a
predetermined length such that the coil spring 75 connects the
suction pipe 11 to the suction muffler 50.
[0043] The coil spring 75 prevents vibration generated from the
compression device 20 and the driving unit 30 from being
transmitted to the sealed casing 10 through the suction pipe 11
while allowing the refrigerant guided into the sealed casing 10
along the suction pipe 11 to enter the suction muffler 50.
[0044] Meanwhile, a connecting path 65 connecting the resonance
space 50a to the refrigerant suctioning chamber 23a is formed in
the guide pipe 62 inserted into the refrigerant suctioning chamber
23a of the cylinder head 23. A check valve 80 is installed on the
connecting path 65 to prevent the refrigerant from flowing backward
from the compression chamber 21a to the resonance space 50a in the
suction muffler 50.
[0045] In order to easily install the check valve 80 on the
connecting path 65, the guide pipe 62 includes a first guide pipe
62a integrated with the first body 60 of the suction muffler 50,
and a second guide pipe 62b fabricated separately from the first
guide pipe 62a and detachably coupled with an upper side of the
first guide pipe 62a. The first guide pipe 62a has a first
extension 62e extended into the resonance space 50a and a second
extension 62f extended out of the resonance space 50a.
[0046] In order to couple the first and second guide pipes 62a and
62b with each other, a male thread is formed on the outer
circumference of the second extension 62f, and a female thread 64
corresponding to the male thread 63 is formed on the inner
circumference of the second guide pipe 62b. Thus, the first guide
pipe 62a is easily coupled with the second guide pipe 62b by
rotating the first guide pipe 62a in a direction where the male
thread 63 is engaged with the female thread 64.
[0047] The check valve 80 on the connecting path 65 includes a reed
valve 81 to open and close the connecting path 65, and a stopper 86
to restrict the movement of the reed valve 81 such that the reed
valve 81 is opened only in one direction.
[0048] The reed valve 81 is made of flexible stainless steel or
plastic material to be easily bent due to a pressure difference,
and the stopper 86 supports the lower end of the reed valve 81 such
that the reed valve 81 is only bent upwardly.
[0049] Thus, when the check valve 80 is installed on the connecting
path 65, the refrigerant can flow only in the direction from the
resonance space 50a of the suction muffler 50 to the compression
chamber 21a but cannot flow visa versa.
[0050] In order to install the check valve 80 on the connecting
path 65, the second guide pipe 62b is separated from the first
guide pipe 62a, and the stopper 86 and the reed valve 81 are
installed on the inner surface of the first guide pipe 62a.
[0051] The reed valve 81 has a fixing protrusion 82 such that the
reed valve 81 is attached to the inner surface of the first guide
pipe 62a to form a fixing end, and the first guide pipe 62a has a
fixing groove 66 cut off from the inner surface of the first guide
pipe 62a in the radial direction such that the fixing protrusion 82
is accommodated and attached in the fixing groove 66.
[0052] In order to install the check valve 80 on the connecting
path 65, the stopper 86 is first attached to a position of the
inner surface of the first guide pipe 62a, facing the fixing groove
66. Next, the reed valve 81 is installed in such a manner that the
fixing protrusion 82 of the reed valve 81 is inserted into and
attached in the fixing groove 66.
[0053] There are different methods of attaching the stopper 86 and
the reed valve 81 such as bolting, bonding, and the like, but
preferably it is done by ultrasonic welding.
[0054] After the installation of the check valve 80 on the
connecting path 65, the second guide pipe 62b is coupled with the
first guide pipe 62a. By doing so, the fixing protrusion 82 of the
reed valve 81 is more firmly fixed by a pressure of a pressing step
67 formed at the lower side of the first guide pipe 62a.
[0055] Hereinafter, operation and effect of the hermetic type
compressor according to one embodiment of the present invention
will be described.
[0056] The piston 22 moves from the top dead center to the bottom
dead center in the compression chamber 21a when the driving unit 30
is operated. At that time, since pressure in the compression
chamber 21a is lower than the external pressure, the low-pressure
refrigerant passing through the evaporator is suctioned into the
compression chamber 21a via the suction pipe 11, the suction
muffler 50, and the refrigerant suctioning chamber 23a. The suction
of the refrigerant into the compression chamber 21a is continued
until the piston 22 reaches the bottom dead center.
[0057] Since the pressure in the compression chamber 21a is higher
than the external pressure due to the movement of the piston 22
from the bottom dead center to the top dead center, the opened
suction valve 24a is moved in a door-closing direction. Since the
suction valve 24a is not promptly but gradually closed in
accordance with a pressure change in the compression chamber 21a,
some of the refrigerant is discharged into the refrigerant
suctioning chamber 23a through the suction valve 24a.
[0058] However, since the check valve 80 is installed on the
connecting path 65 to connect the refrigerant suctioning chamber
23a to the resonance space 50a of the suction muffler 50, the
flowed back refrigerant does not enter the resonance space 50a.
Thus, it is possible to solve the problem of low frequency noise
generated from the back flowing refrigerant by vibrating the
resonance space 50a.
[0059] Moreover, the quantity of the refrigerant discharged through
the suction valve can be reduced, the compression ability of the
compressor can also be improved, and the refrigerating ability of
an oval refrigerating cycle can be improved.
[0060] As described above, according to the hermetic type
compressor of the present invention, refrigerant flowing backward
through a suction valve is prevented from entering a resonance
space of a suction muffler so that the quantity of refrigerant
discharged through the suction valve can be reduced, and the
compression ability of the compressor can be improved.
[0061] Although a few embodiments of the present invention have
been shown and described, it would be appreciated by those skilled
in the art that changes may be made in those embodiments without
departing from the principles and spirit of the invention, the
scope of which is defined in the claims and their equivalents.
* * * * *