U.S. patent application number 14/116756 was filed with the patent office on 2014-12-25 for hermetic compressor with discharge pulsation reducing member mounted thereon.
This patent application is currently assigned to Dongbu Daewoo Electronics Corporation. The applicant listed for this patent is Dongbu Daewoo Electronics Corporation. Invention is credited to Yong Seok Lee.
Application Number | 20140377107 14/116756 |
Document ID | / |
Family ID | 49624073 |
Filed Date | 2014-12-25 |
United States Patent
Application |
20140377107 |
Kind Code |
A1 |
Lee; Yong Seok |
December 25, 2014 |
HERMETIC COMPRESSOR WITH DISCHARGE PULSATION REDUCING MEMBER
MOUNTED THEREON
Abstract
The present disclosure relates to a hermetic compressor with a
discharge pulsation reducing member mounted therein, the hermetic
compressor including a case; a cylinder block disposed in the case;
a discharge muffler disposed on the upper portion of the cylinder
block and having a first chamber and a separate second chamber to
reduce the pulsating components of the discharged refrigerant, the
first chamber and the second chamber being connected to each other
by a connection passage inside the discharge muffler; and the
discharge pulsation reducing member fixed in the connection passage
and having a pulsation reducing passage formed along the outer
peripheral surface thereof.
Inventors: |
Lee; Yong Seok; (Incheon,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Dongbu Daewoo Electronics Corporation |
Seoul |
|
KR |
|
|
Assignee: |
Dongbu Daewoo Electronics
Corporation
Seoul
KR
|
Family ID: |
49624073 |
Appl. No.: |
14/116756 |
Filed: |
May 21, 2013 |
PCT Filed: |
May 21, 2013 |
PCT NO: |
PCT/KR2013/004416 |
371 Date: |
November 8, 2013 |
Current U.S.
Class: |
417/437 |
Current CPC
Class: |
F04B 39/0055 20130101;
F04B 39/121 20130101; F04B 53/001 20130101; F04B 39/0061
20130101 |
Class at
Publication: |
417/437 |
International
Class: |
F04B 53/00 20060101
F04B053/00; F04B 39/12 20060101 F04B039/12 |
Foreign Application Data
Date |
Code |
Application Number |
May 21, 2012 |
KR |
10-2012-0053915 |
Claims
1. A hermetic compressor, comprising: a case; a cylinder block in
the case; a discharge muffler on or in an upper portion of the
cylinder block and having a first chamber and a separate second
chamber, the first chamber and the second chamber being connected
to each other by a connection passage; and a discharge pulsation
reducing member in the connection passage and having a pulsation
reducing passage along an outer peripheral surface thereof.
2. The hermetic compressor according to claim 1, wherein the
pulsation reducing passage and the connection passage form a
passage for the refrigerant.
3. The hermetic compressor according to claim 1, wherein the
pulsation reducing passage of the discharge pulsation reducing
member has a screw or spiral shape.
4. The hermetic compressor according to claim 1, wherein the
discharge pulsation reducing member is connected to the connection
passage.
5. The hermetic compressor according to claim 1, wherein the
discharge pulsation reducing member is tapered in a longitudinal
direction and fixed to the connection passage by an interference
fit.
6. The hermetic compressor according to claim 1, wherein the
discharge pulsation reducing member has a head allowing a tool to
couple the discharge pulsation reducing member to the connection
passage.
7. The hermetic compressor according to claim 1, wherein the
discharge pulsation reducing member has a cross-sectional shape
selected from a circular shape and a polygonal shape.
8. The hermetic compressor according to claim 3, wherein the
pulsation reducing passage has an inlet and an outlet on opposed
ends thereof in communication with each other in a longitudinal
direction.
9. The hermetic compressor according to claim 2, wherein the
pulsation reducing passage of the discharge pulsation reducing
member has a screw or spiral shape.
10. The hermetic compressor according to claim 2, wherein the
discharge pulsation reducing member is connected to the connection
passage.
11. The hermetic compressor according to claim 2, wherein the
discharge pulsation reducing member is tapered in a longitudinal
direction and fixed to the connection passage by an interference
fit.
12. The hermetic compressor according to claim 2, wherein the
discharge pulsation reducing member has a head having a shape
allowing a tool to couple the discharge pulsation reducing member
to the connection passage.
13. The hermetic compressor according to claim 2, wherein the
discharge pulsation reducing member has a cross-sectional shape
selected from a circular shape and a polygonal shape.
14. The hermetic compressor according to claim 9, wherein the
pulsation reducing passage has an inlet and an outlet on opposed
ends thereof in communication with each other in a longitudinal
direction.
Description
TECHNICAL FIELD
[0001] The present invention relates to a compressor, and more
particularly, to a hermetic compressor that has a discharge
pulsation reducing member mounted thereon to control the pulsating
components of a working fluid and to reduce the vibration and noise
generated from the compressor during the refrigeration cycle.
BACKGROUND ART
[0002] Generally, a refrigeration cycle is a process wherein
compressed refrigerant gas having a high temperature and high
pressure by operation of a compressor is liquefied by a condenser
and then vaporized in an evaporator via an expansion valve, thereby
conducting cooling using the vaporization heat of the
refrigerant.
[0003] In the process of the refrigeration cycle, the compressor is
a device for compressing the gaseous refrigerant from the
evaporator, where the liquid refrigerant is evaporated and cooled
by removing the surrounding heat, into high temperature and high
pressure.
[0004] However, the pulsating components, which are generated when
the gaseous refrigerant is discharged from the compressor to the
condenser, excite the pipe of the refrigeration cycle, thereby
generating noise and vibrations in the refrigeration cycle.
[0005] To reduce the above-mentioned problems, a discharge muffler
is mounted on a cylinder block to reduce the noise in the discharge
passage of the compressor.
[0006] The discharge muffler is adapted to reduce the pulsation of
the refrigerant discharged from the compressor, and is separated
into a first chamber and a second chamber connected to each other
by a connection passage.
[0007] Further, the first chamber is connected by a passage to a
cylinder cover having a space into which a high pressure
refrigerant is supplied from a cylinder, and the second chamber is
connected to a discharge pipe.
[0008] In the conventional practice, the noise caused from the
pulsation of the refrigerant is reduced by the discharge muffler
having the above-mentioned configuration, but if the connection
passage connecting the first chamber and the second chamber is
provided only by a casting process, the length of the connection
passage is restricted, and the pulsation reducing effects are
limited.
[0009] To overcome the above-mentioned problems, recently, there
have been proposed technologies where a pipe having a given inner
diameter and length connects the first chamber and the second
chamber, thereby reducing the pulsating components of the
refrigerant much more.
[0010] In this case, however, the pipe is exposed to the exterior
of the cylinder block and interferes with the internal wall of the
external case of the compressor, and therefore, the installation of
the pipe should be considered upon designing the external case.
Especially, if the pipe is mounted inside the chamber, the chamber
should be increased in size to accommodate the pipe therein,
thereby making the size of the cylinder block undesirably
bulky.
[0011] Accordingly, the space utilization and productivity of the
compressor are decreased.
DISCLOSURE
Technical Problem
[0012] Accordingly, the present invention has been made in view of
the above-mentioned problems occurring in the prior art, and it is
an object of the present invention to provide a hermetic compressor
with a discharge pulsation reducing member therein that has a
connection passage in a cylinder block to connect a first chamber
and a second chamber, and the discharge pulsation reducing member
fixedly mounted inside the connection passage to increase the
refrigerant passage, thereby reducing the discharge pulsation,
without any separate installation space.
Technical Solution
[0013] To accomplish the above object, according to the present
invention, there is provided a hermetic compressor with a discharge
pulsation reducing member therein, the hermetic compressor
including a case; a cylinder block in the case; a discharge muffler
on an upper portion of the cylinder block and having a first
chamber and a separate second chamber to reduce pulsating
components of discharged refrigerant, the first chamber and the
second chamber being connected to each other by a connection
passage; and the discharge pulsation reducing member fixed in the
connection passage and having a pulsation reducing passage along an
outer peripheral surface thereof.
[0014] According to the present invention, preferably, the
pulsation reducing passage together with the connection passage
form a passage for the refrigerant.
[0015] According to the present invention, preferably, the
pulsation reducing passage of the discharge pulsation reducing
member has a screw shape.
[0016] According to the present invention, preferably, the
discharge pulsation reducing member is screwed to the connection
passage corresponding thereto.
[0017] According to the present invention, preferably, the
discharge pulsation reducing member is tapered in the longitudinal
direction thereof and fixed to the connection passage by an
interference fit.
[0018] According to the present invention, preferably, the
discharge pulsation reducing member has a head having one of
various shapes to allow a use a tool to be used for the coupling to
the connection passage.
[0019] According to the present invention, preferably, the
discharge pulsation reducing member has a cross-sectional shape
selected from a circular shape and a polygonal shape.
[0020] According to the present invention, preferably, the
pulsation reducing passage has an inlet and an outlet on opposed
ends thereof in communication with each other in the longitudinal
direction thereof.
Advantageous Effects
[0021] According to the present invention, the hermetic compressor
with a discharge pulsation reducing member mounted therein is
provided with a connection passage in the cylinder block to connect
the first chamber and the second chamber and with the discharge
pulsation reducing member fixed in the connection passage to
increase the refrigerant passage length, thereby controlling
pulsating components of the refrigerant and further reducing the
vibrations and noise generated during the refrigeration cycle.
[0022] In addition, the discharge pulsation reducing member is
mounted fixedly inside the connection passage in the cylinder
block, and accordingly, no separate installation space is needed,
thereby decreasing the size of the external case of the compressor
and thus increasing the space utilization and productivity of the
compressor.
[0023] Further, the length and cross-sectional area of the
pulsation reducing passage of the discharge pulsation reducing
member can be changed in accordance with the pulsation properties
of the compressor, thereby controlling the pulsation in accordance
with the discharge states of the refrigerant.
DESCRIPTION OF DRAWINGS
[0024] FIGS. 1 and 2 are cutaway perspective and front
cross-sectional views showing a hermetic compressor with a
discharge pulsation reducing member mounted therein according to
the present invention.
[0025] FIG. 3 is a cross-sectional view showing the hermetic
compressor with a discharge pulsation reducing member mounted
therein according to the present invention.
[0026] FIG. 4 is a perspective view showing one example of the
discharge pulsation reducing member of FIG. 3.
[0027] FIGS. 5 and 6 are perspective views showing other examples
of the discharge pulsation reducing member in the hermetic
compressor according to the present invention.
[0028] FIG. 7 is a graph showing the discharge pulsations between
the invention and a comparison example.
DETAILED DESCRIPTION
[0029] Hereinafter, an explanation of a hermetic compressor with a
discharge pulsation reducing member mounted therein according to
the present invention will be given in detail with reference to the
attached drawings, FIG. 1 to FIG. 7.
[0030] According to the present invention, as shown in FIGS. 1 and
2, a hermetic compressor with a discharge pulsation reducing member
mounted therein, which is installed in a machine room of a
refrigerator and connected to a condenser (not shown) to compress
gaseous refrigerant to a high pressure and to supply the compressed
refrigerant to the condenser, generally includes a case 1, a
cylinder block 100 disposed in the case 1 and a discharge muffler
200 disposed in an upper portion of the cylinder block 100 to
reduce the pulsating components of the discharged refrigerant.
[0031] The discharge muffler 200 has a first chamber 210 and a
separate second chamber 220, and the first chamber 210 and the
second chamber 220 are connected to each other by a connection
passage 10.
[0032] Further, the first chamber 210 is connected by a passage 212
to a cylinder cover 211 having a space on one side thereof to
receive the high pressure refrigerant discharged from a cylinder,
and the second chamber 220 is connected to a discharge pipe
221.
[0033] In this case, the connection passage 10 serves to connect
the first chamber 210 and the second chamber 220 to each other and
further to control the pulsating components of the refrigerant.
[0034] That is, after the high temperature and high pressure
refrigerant introduced into the discharge muffler 200 flows into
the first chamber 210, it is passed through the connection passage
10 and sent to the second chamber 220, so that the flow velocity of
the refrigerant is reduced and the refrigerant having a reduced
flow velocity is supplied to the condenser through the discharge
pipe 221.
[0035] According to the present invention, as shown in FIG. 3, a
discharge pulsation reducing member 20, which has a bar-like shape
to increase the passage length of the refrigerant, is fixedly
inserted into the connection passage 10 to reduce the pulsating
components of the refrigerant, that is, the vibrations and noise,
under the conditions where the size and shape of the discharge
muffler 200 are not changed.
[0036] As shown in FIGS. 4 to 6, the discharge pulsation reducing
member 20 according to the present invention includes a
groove-shaped pulsation reducing passage 21 formed along the outer
peripheral surface thereof and an inlet 22 and an outlet 23 on
opposed ends of the pulsation reducing passage 21 in communication
with each other in the longitudinal direction thereof.
[0037] To rigidly fix the discharge pulsation reducing member
having the above-mentioned structure to the connection passage 10,
a screw thread is formed along the outer peripheral surface of the
discharge pulsation reducing member 20, and a screw thread to be
fastened correspondingly to the screw thread on the discharge
pulsation reducing member 20 is formed along the connection passage
10, so that the discharge pulsation reducing member 20 and the
connection passage 10 are screwed to each other. Alternatively, the
discharge pulsation reducing member 20 is tapered in the
longitudinal direction thereof and fixed to the connection passage
10 by an interference fit.
[0038] Accordingly, the pulsation reducing passage 21 together with
the connection passage 10 form a passage for the refrigerant.
[0039] When the discharge pulsation reducing member 20 is screwed
into the connection passage 10, desirably, the position and length
of the screw thread for fastening the discharge pulsation reducing
member 20 to the connection passage 10 are appropriately adjusted
in accordance with machining conveniences, and to easily use a tool
for coupling to the connection passage 10, a head 24 of the
discharge pulsation reducing member 20 may preferably have one of
various shapes.
[0040] In addition to a circular cross-sectional shape, the
discharge pulsation reducing member 20 may have a polygonal
cross-sectional shape.
[0041] Accordingly, the discharge pulsation reducing member 20 on
or in which the pulsation reducing passage 21 is formed is mounted
along the inner peripheral surface of the connection passage 10
connecting the first chamber 210 and the second chamber 220 of the
discharge muffler 200, so that the refrigerant introduced into the
first chamber 210 is passed through the inlet 22 and the pulsation
reducing passage 21 of the discharge pulsation reducing member 20,
and is sent to the second chamber 220 through the outlet 23.
[0042] That is, the length of the connection passage 10 can be
extended through the pulsation reducing passage 21 on or in the
discharge pulsation reducing member 20, so that the flow velocity
of the refrigerant supplied from the first chamber 210 to the
second chamber 220 through the connection passage 10 can be reduced
to remarkably dampen the noise or vibrations generated in the
compressor.
[0043] Preferably, the pulsation reducing passage 21 is adjustable
in length and cross-sectional area to conduct pulsation control
corresponding to the pulsating components, and accordingly, the
length and cross-sectional area of the pulsation reducing passage
21 are appropriately adjusted in accordance with the frequencies to
control the pulsating components.
[0044] That is, the pulsation reducing passage 21 formed in the
discharge pulsation reducing member 20 can have various shapes,
such as a screw-shaped passage, etc., to adjust the length
thereof.
[0045] FIG. 7 is a graph showing the discharge pulsations between
the invention and a comparison example. According to the present
invention, the graph shows the frequency bands of the refrigerant
measured when the discharge pulsation reducing member 20 is
disposed in the connection passage 10 formed between the first
chamber 210 and the second chamber 220, but according to the
comparison example, the graph shows the frequency bands of the
refrigerant measured in the absence of the discharge pulsation
reducing member 20. As shown in FIG. 7, it can be appreciated that
the low frequency components in the frequency bands between 100 Hz
and 300 Hz are reduced by the installation of the discharge
pulsation reducing member 20.
[0046] According to the present invention, the discharge pulsation
reducing member 20 is in the connection passage 10 between the
first chamber 210 and the second chamber 220, but it is not
necessarily limited thereto. That is, the discharge pulsation
reducing member 20 may be disposed at any position if it can reduce
the vibrations and noise generated during the refrigeration cycle.
For example, if enough space is in a valve seat surface 213 of the
cylinder block 100, the discharge pulsation reducing member 20 may
be disposed on or in the valve seat surface 213 and the passage 212
of the first chamber 210 of the discharge muffler 200.
[0047] While the present invention has been described with
reference to particular illustrative embodiments, it is not to be
restricted by the embodiments, but only by the appended claims. It
is to be appreciated that those skilled in the art can change or
modify the embodiments without departing from the scope and spirit
of the present invention.
* * * * *