U.S. patent application number 13/857694 was filed with the patent office on 2013-10-10 for sealed compressor.
This patent application is currently assigned to Panasonic Corporation. The applicant listed for this patent is PANASONIC CORPORATION. Invention is credited to Hiromitsu IWATA, Akihiko KUBOTA, Yuji MORI, Masato MORISHIMA, Takayuki OKAMOTO, Hiroki TORIMASU.
Application Number | 20130266459 13/857694 |
Document ID | / |
Family ID | 49292445 |
Filed Date | 2013-10-10 |
United States Patent
Application |
20130266459 |
Kind Code |
A1 |
MORISHIMA; Masato ; et
al. |
October 10, 2013 |
SEALED COMPRESSOR
Abstract
A sealed compressor comprises an electric component; a
compression component actuated by the electric component; a sealed
container accommodating the electric component and the compression
component; a suction pipe provided to suction a refrigerant into
the sealed container; and a suction muffler having an inner space
communicating with a compression chamber of the compression
component and a suction port through which the refrigerant is
suctioned into the inner space; a communicating passage for
providing communication between the suction port of the suction
muffler and the suction pipe, the communicating passage being made
of a flexible material; and at least one cut portion provided in an
end portion of the communicating passage at the suction pipe side
such that the cut portion cuts a portion of the end portion.
Inventors: |
MORISHIMA; Masato; (Shiga,
JP) ; MORI; Yuji; (Shiga, JP) ; KUBOTA;
Akihiko; (Kyoto, JP) ; IWATA; Hiromitsu;
(Shiga, JP) ; OKAMOTO; Takayuki; (Shiga, JP)
; TORIMASU; Hiroki; (Shiga, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PANASONIC CORPORATION |
Osaka |
|
JP |
|
|
Assignee: |
Panasonic Corporation
Osaka
JP
|
Family ID: |
49292445 |
Appl. No.: |
13/857694 |
Filed: |
April 5, 2013 |
Current U.S.
Class: |
417/410.1 |
Current CPC
Class: |
F04B 39/123 20130101;
F04D 13/06 20130101 |
Class at
Publication: |
417/410.1 |
International
Class: |
F04D 13/06 20060101
F04D013/06 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 9, 2012 |
JP |
2012-088254 |
Mar 26, 2013 |
JP |
2013-064993 |
Claims
1. A sealed compressor comprising: an electric component; a
compression component actuated by the electric component; a sealed
container accommodating the electric component and the compression
component; a suction pipe provided to suction a refrigerant into
the sealed container; and a suction muffler having an inner space
communicating with a compression chamber of the compression
component and a suction port through which the refrigerant is
suctioned into the inner space; a communicating passage for
providing communication between the suction port of the suction
muffler and the suction pipe, the communicating passage being made
of a flexible material; and at least one cut portion provided in an
end portion of the communicating passage at the suction pipe side
such that the cut portion cuts a portion of the end portion.
2. The sealed compressor according to claim 1, wherein one end
portion of the communicating passage is secured to the suction
muffler, and the other end portion of the communicating passage is
pressed against a portion of an inner peripheral surface of the
sealed container which is around an opening end portion of the
suction pipe.
3. The sealed compressor according to claim 1, wherein the cut
portion extends inward from an end portion of the communicating
passage at the suction pipe side.
4. The sealed compressor according to claim 1, wherein the cut
portion has a linear shape.
5. The sealed container according to claim 4, wherein the
linear-shaped cut portion extends in an axial direction of the
communicating passage.
6. The sealed compressor according to claim 1, wherein at least one
cut portion is positioned at a lower end side of the communicating
passage.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a sealed compressor.
Particularly, the present invention relates to a structure for
suctioning a refrigerant into a compression component.
[0003] 2. Description of the Related Art
[0004] There is known a conventional sealed compressor including a
communicating passage made of a flexible material, which provides
communication between a suction port of a suction muffler and a
suction pipe of the suction muffler, to improve an efficiency (see
e.g., Translation of PCT Application Publication No. Sho. 63-500878
and Translation of PCT Application Publication No.
2010-502900).
[0005] Hereinafter, this conventional sealed compressor will be
described.
[0006] The conventional sealed compressor includes a sealed
container which accommodates an electric component, and a
compression component actuated by the electric component, and a
suction pipe which provides communication between inside of the
sealed container and outside of the sealed container.
[0007] The electric component and the compression component are
assembled integrally. The electric component and the compression
component are elastically supported in the sealed container by
means of a plurality of coils.
[0008] The compression component includes a cylinder block in which
a cylindrical compression chamber is formed, a piston inserted into
the compression chamber such that the piston is reciprocatingly
slidable, and a suction muffler having a muffling space
communicating with the communication chamber.
[0009] The suction muffler includes a suction port through which
the muffling space and an inner space of the sealed container
communicate with each other. The suction port is attached with a
communicating passage which provides communication between the
suction port and the suction pipe.
[0010] A tip end portion of the communicating passage encloses the
suction pipe and is pressed to elastically contact a wall surface
of the sealed container.
[0011] Hereinafter, an operation of the conventional sealed
compressor will be described.
[0012] When a current is supplied to the electric component, a
rotor rotates, and thereby the piston reciprocates within the
compression chamber, and the compression component performs a
predetermined compression operation.
[0013] Thereupon, the refrigerant which has flowed from a cooling
system is suctioned into the suction muffler from the suction pipe,
via the communicating passage, and through the suction port. Then,
the refrigerant is suctioned into the compression chamber through
the muffling space. In the compression chamber, the refrigerant is
compressed by the reciprocating motion of the piston. Thereafter,
the refrigerant is discharged to the cooling system again.
[0014] The refrigerant with a relatively low temperature is
suctioned into the suction muffler because the suction pipe and the
suction port are communicated with each other via the communicating
passage. As a result, a mass of the suctioned refrigerant (an
amount of circulated refrigerant) per unit time increases, thereby
improving an efficiency of the sealed compressor.
SUMMARY OF THE INVENTION
[0015] However, in the conventional configuration, there is a
possibility that the tip end portion of the communicating passage
is pressed unevenly against a curved surface of an inner wall of
the sealed container. In addition, during transportation or stop of
running of the sealed compressor, the electric component and the
compression component which are elastically supported in the sealed
container whirl, and thereby, a prying force is locally generated
in the communicating passage. The communicating passage has an
annular shape and has a high stiffness. Because of this, the prying
force is easily transmitted to a mounting member by which the
communicating passage is mounted to the suction muffler. If the
prying force is applied to the communicating passage many times,
the mounting member of the communicating passage may possibly be
disengaged.
[0016] To avoid this, the sealed compressor disclosed in
Translation of PCT Application Publication No. 2010-502900 includes
a clamp for securing the communicating passage to the suction port.
Since the clamp secures the mounting member of the communicating
passage, the mounting member can be prevented from being
disengaged. However, the compression component whirls around a tip
end surface of the communicating passage pressed against the sealed
container. If the prying force is applied repetitively to the
communicating passage, a stress is generated in the vicinity of the
mounting member of the communicating passage repetitively, which
may probably damage the communicating passage.
[0017] The present invention is directed to solving the above
described problem associated with the prior art, and an object of
the present invention is to provide a highly reliable sealed
compressor which suppresses a force from being transmitted to the
communicating passage, to prevent the communicating passage from
being disengaged or damaged.
[0018] In order to solve the above described problem associated
with the prior art, a sealed compressor of the present invention is
configured such that a suction port of a suction muffler and a
suction pipe are communicated with each other via a communicating
passage made of a flexible material, and the communicating passage
is provided with at least one cut portion on an end portion thereof
at the suction pipe side such that the cut portion cuts a portion
of the end portion.
[0019] In this configuration, the cut portion can reduce a
stiffness of the end portion of the communicating passage at the
suction pipe side, and mitigate a prying force. Therefore, it
becomes possible to prevent the communicating passage from being
disengaged or being damaged.
[0020] The communicating passage is pressed unevenly against the
inner wall surface of the sealed container, due to a variation in
accuracy of components, a variation in centering adjustment of the
compression component in assembling, etc., or the compression
component whirs during transportation or at stop of running of the
sealed compressor, and thereby a force is applied to a localized
portion of the communicating passage. However, in accordance with
the present invention, it becomes possible to suppress the force
from being transmitted to the communicating passage, prevent the
communicating passage from being disengaged or damaged. Thus, a
highly reliable sealed compressor can be provided.
[0021] The above and further objects, features and advantages of
the present invention will more fully be apparent from the
following detailed description of preferred embodiments with
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 is a top plan view of a sealed compressor according
to Embodiment 1 of the present invention.
[0023] FIG. 2 is a longitudinal sectional view of the sealed
compressor according to Embodiment 1 of the present invention.
[0024] FIG. 3 is a perspective view of a communicating passage of
the sealed compressor according to Embodiment 1 of the present
invention.
[0025] FIG. 4 is an enlarged view of major components of the sealed
compressor according to Embodiment 1 of the present invention, in a
state in which the communicating passage is pressed unevenly to the
sealed container.
[0026] FIG. 5 is a longitudinal sectional view of major components
of the sealed compressor according to Embodiment 1 of the present
invention.
[0027] FIGS. 6A to 6C are views schematically showing external
appearances of communicating passages according to Modified
examples of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0028] According to a first aspect of the present invention, a
sealed compressor comprises: an electric component; a compression
component actuated by the electric component; a sealed container
accommodating the electric component and the compression component;
a suction pipe provided to suction a refrigerant into the sealed
container; and a suction muffler having an inner space
communicating with a compression chamber of the compression
component and a suction port through which the refrigerant is
suctioned into the inner space; a communicating passage for
providing communication between the suction port of the suction
muffler and the suction pipe, the communicating passage being made
of a flexible material; and at least one cut portion provided in an
end portion of the communicating passage at the suction pipe side
such that the cut portion cuts a portion of the end portion.
[0029] The term "cut portion" is defined as a portion which cuts a
portion of a peripheral wall of the end portion of the
communicating passage at the suction pipe side. The cut portion may
have a linear shape or a hollow shape having an area. Hereinafter,
the linear-shaped cut portion will be referred to as a "cut-in
portion", while the hollow cut portion having an area will be
referred to as "hollow portion." For example, the cut portion may
be formed in such a manner that after a communicating passage
having no cut portion is manufactured, its end portion is cut, or
that a communicating passage having a cut portion in an end portion
thereof is manufactured by resin molding, etc.
[0030] The "end portion" is defined as an end surface of the
communicating passage at the suction pipe side and a portion in the
vicinity of the end surface.
[0031] In accordance with this configuration, during transportation
or stop of running of the sealed compressor, even when the
compression component elastically supported inside of the sealed
container whirl, and thereby the communicating passage is pressed
unevenly against the sealed container, a prying force can be
mitigated by the cut portion, and it becomes possible to prevent a
force from being transmitted to the communicating passage. Thus, it
becomes possible to prevent the communicating passage from being
disengaged and a portion in the vicinity of the communicating
passage from being damaged, which would be caused by the prying
force. As a result, it is possible to provide a highly reliable
sealed compressor.
[0032] According to a second aspect of the present invention, in
the first aspect, one end portion of the communicating passage is
secured to the suction muffler, and the other end of the
communicating passage is pressed against a portion of an inner
peripheral surface of the sealed container which is around an
opening end portion of the suction pipe.
[0033] In this configuration, the refrigerant which has returned
from the cooling system is directly suctioned into the suction
muffler. Therefore, a mass of the suctioned refrigerant per unit
time increases, and the efficiency of the compressor is improved.
Since the communicating passage is pressed against the inner wall
surface of the sealed container, the prying force increases.
However, this prying force is mitigated by the cut portion.
Therefore, damage to the communicating passage can be
prevented.
[0034] According to a third aspect of the present invention, in the
first aspect, the cut portion may extend inward from an end portion
of the communicating passage at the suction pipe side.
[0035] In this configuration, since the end portion of the
communicating passage at the suction pipe side is cut, stiffness of
the end portion of the communicating passage at the suction pipe
side can be reduced effectively and easily.
[0036] According to a fourth aspect of the present invention, in
the first aspect, the cut portion may have a linear shape.
[0037] In this configuration, since the cut portion has the linear
shape, an amount of a warm refrigerant gas which is suctioned from
an inner space of the sealed container into the suction muffler can
be lessened. Thus, reduction of the efficiency of the sealed
compressor can be suppressed.
[0038] According to a fifth aspect of the present invention, in the
fourth aspect, the linear-shaped cut portion may extend in the
axial direction of the communicating passage.
[0039] If the cut portion extends in a circumferential direction of
the communicating passage, a tensile strength in an axial direction
of the communicating passage is reduced, and the communicating
passage is more likely to be damaged. However, since the cut
portion extends in the axial direction of the communicating
passage, the stiffness of the end portion of the communicating
passage at the suction pipe side can be reduced while suppressing
reduction of a tensile stress in the axial direction of the
communicating passage.
[0040] According to a sixth aspect of the present invention, in the
first aspect, at least one cut portion is positioned at a lower end
side of the communicating passage.
[0041] In this configuration, since the communicating passage is
closely mounted to the sealed container, liquid refrigerant or oil
having a great specific gravity stays in a bottom portion of the
communicating passage. The liquid refrigerant or oil is discharged
through the cut portion. As a result, it becomes possible to
provide a sealed compressor which has a high reliability and a high
efficiency.
[0042] Hereinafter, preferred embodiment of the present invention
will be described with reference to the drawings. The embodiment is
in no way intended to limit the present invention.
Embodiment 1
[0043] FIG. 1 is a top plan view of a sealed compressor according
to Embodiment 1 of the present invention. FIG. 2 is a longitudinal
sectional view of the sealed compressor according to Embodiment 1
of the present invention. FIG. 3 is a perspective view of a
communicating passage of the sealed compressor according to
Embodiment 1 of the present invention. FIG. 4 is an enlarged view
of major components of the sealed compressor according to
Embodiment 1 of the present invention, in a state in which the
communicating passage is displaced from a proper location. FIG. 5
is a longitudinal sectional view of major components of the sealed
compressor according to Embodiment 1 of the present invention.
[0044] Referring to FIGS. 1 to 5, a sealed container 101 stores oil
102 in a bottom portion thereof, and accommodates an electric
component 105 including a stator 103 and a rotor 104, and a
compression component 106 actuated by the electric component 105,
and a suction pipe 107 which provides communication between inside
of the sealed container 101 and outside of the sealed container
101.
[0045] The electric component 105 and the compression component 106
are assembled integrally. The electric component 105 and the
compression component 106 are elastically supported inside of the
sealed container 101, by means of a plurality of coil springs 108.
Although the coil springs 108 are used as an elastic support
member, it is sufficient that the elastic support member is a
member which elastically supports the electric component 105 and
the compression component 106.
[0046] As the compression component 106, a known compressor may be
used. In the present embodiment, as the compression component 106,
a reciprocating compressor is used. The compression component 106
includes, for example, a cylinder block 110 in which a cylindrical
compression chamber 109 is formed, a piston 111 inserted into the
compression chamber 109 such that the piston 111 is reciprocatingly
slidable, and a suction muffler 112 having a muffling space (inner
space) 120 communicating with the compression chamber 109.
[0047] The suction muffler 112 includes a suction port 113 through
which the muffling space 120 and an inner space of the sealed
container 101 communicate with each other. Through the suction port
113, refrigerant is suctioned into the muffling space 120. The
suction port 113 and the suction pipe 107 are communicated with
each other via a communicating passage 114. The communicating
passage 114 is made of a flexible material.
[0048] In the present embodiment, the communicating passage 114 is
made of, for example, NBR (nitrile butadiene rubber). One end
portion (base end portion) of the communicating passage 114 is
secured to the suction muffler 112, while the other end portion
(tip end portion) thereof is pressed against a portion of an inner
peripheral surface of the sealed container 101 which is around an
opening end of the suction pipe 107.
[0049] The communicating passage 114 and the suction port 113 of
the suction muffler 112 may be secured to each other by means of a
clamp and the like.
[0050] The communicating passage 114 extends from the suction port
113 of the suction muffler 112 to guide the refrigerant from the
suction pipe 107 to the suction port 113 of the suction muffler
112. The communicating passage 114 encloses the opening end of the
suction pipe 107 and is pressed against the inner wall surface of
the sealed container 101 so as to elastically contact the inner
wall surface. The communicating passage 114 has at least one cut-in
portion 117 at the sealed container 101 side.
[0051] In the present embodiment, the communicating passage 114 has
the cut-in portion (linear-shaped cut portion) 117 extending inward
in an axial direction of the communicating passage 114 from an end
surface of the communication passage 114 at the inner wall surface
side of the sealed container 101 (end at the suction pipe 107
side).
[0052] The cut-in portion 117 has a circular hollow portion at a
tip end thereof. This circular cut portion can prevent the cut-in
portion 117 from spreading axially inward with a passage of a use
time of the sealed compressor. The hollow portion may have a
desired shape, or may be omitted.
[0053] An opening of the cut-in portion 117 is formed to have a
minimum dimension and designed so that portions at both sides of
the cut-in portion 117 are not apart from each other, under no load
condition. A portion of the cut-in portion 117 is disposed at a
lower end side of the communicating passage 114 and at a lower
surface side of the compressor.
[0054] In the present embodiment, as the refrigerant, R600a is
used. Alternatively, R134a, R410a, or another refrigerant may be
used.
[0055] Next, an operation and advantages of the sealed compressor
configured as described above will be described.
[0056] When a current is supplied from an outside power supply to
the electric component 105, the rotor 104 rotates. Thereby, the
piston 111 reciprocates within the compression chamber 109 and the
compression component 106 performs a predetermined compression
operation.
[0057] During a suction process, a pressure in the combustion
chamber 109 is lowered. With this, a pressure in the communicating
passage 114 is lowered, so that the refrigerant is guided from an
outside refrigeration system (not shown) to the interior of the
compressor via the suction pipe 107.
[0058] The refrigerant is guided to the communicating passage 114
through the suction pipe 107 and then is suctioned into the
compression chamber 109 through the muffling space 120 of the
suction muffler 112.
[0059] The refrigerant is compressed within the compression chamber
109 by the reciprocating motion of the piston 111, and then
discharged to the cooling system again. At this time, a pulsation
of the refrigerant which is caused by the compression is damped in
the muffling space 120 of the suction muffler 112 and thereby a
noise is mitigated.
[0060] Since the suction pipe 113 and the suction pipe 107 are
communicated with each other via the communicating passage 114, the
refrigerant with a relatively low temperature is suctioned into the
suction muffler 112, and compressed in the compression chamber 109.
As a result, a mass of the suctioned refrigerant (an amount of
circulated refrigerant) per unit time increases, and a freezing
ability increases, thereby improving an efficiency of the sealed
compressor.
[0061] Since the compression component 106 is elastically supported
in the sealed container 101 by means of the coil springs 108, the
compression component 106 is displaced significantly under an
influence of the rotor 104 at start-up of the compressor. Or, at
stop of the compressor, the piston 111 is pushed back by a pressure
within the compression chamber 109, and thereby the compression
component 106 is displaced significantly. The coil springs 108 are
configured to have low stiffness to damp a vibration generated in
the compression component 106 and transmitted to the sealed
container 101 so that a vibration of the compressor is reduced.
And, it is difficult to prevent the compression component 106 from
being displaced. If the stiffness of the communicating passage 114
mounted so as to contact the inner wall surface of the sealed
container 101 is high, a communicating passage mounting member 115
will be damaged (disengaged) by an impact generated by a collision
between the communicating passage 114 and the sealed container 101,
which is caused by the significant displacement of the compression
component 106 at start-up and at stop of the compressor.
[0062] However, since the communicating passage 114 is provided
with the cut-in portion 117, the cut-in portion 117 is deflected
even when the compression component 106 is displaced significantly.
Thereby, the impact caused by the collision between the
communicating passage 114 and the sealed container 101 can be
damped, and damage to the communicating passage 114 can be
avoided.
[0063] During transportation or stop of running of the sealed
compressor, even when the compression component 106 elastically
supported inside of the sealed container 101 whirl, and thereby the
communicating passage 114 is pressed unevenly against the inner
wall surface of the sealed container 101, a prying force can be
mitigated by the cut-in portion 117, and it becomes possible to
prevent a force from being transmitted to the communicating passage
114. Thus, it becomes possible to prevent the communicating passage
114 from being disengaged and a portion in the vicinity of the
communicating passage 114 from being damaged, which would be caused
by the prying force. As a result, it is possible to provide a
highly reliable sealed compressor.
[0064] Moreover, in the present embodiment, one end portion of the
communicating passage 114 is secured to the suction muffler 112,
and the other end portion of the communicating passage 114 is
pressed against a portion of the inner peripheral surface of the
sealed container 101 which is around the opening end portion of the
suction pipe 107. In this configuration, the refrigerant which has
returned from the cooling system is directly suctioned into the
suction muffler 112. Therefore, a mass of the suctioned refrigerant
per unit time increases, and the efficiency of the compressor is
improved. Since the communicating passage 114 is pressed against
the inner wall surface of the sealed container 101, the prying
force increases. However, this prying force is mitigated by the
cut-in portion 117. Therefore, damage to the communicating passage
114 can be prevented.
[0065] In the present embodiment, the cut-in portion 117 extends
inward from the end portion of the communicating passage 114 at the
suction pipe 107 side. Since the end portion of the communicating
passage 114 at the suction pipe 107 side is cut, stiffness of the
end portion of the communicating passage 114 at the suction pipe
107 side can be reduced effectively and easily.
[0066] Furthermore, in the present embodiment, the cut-in portion
117 has a linear shape. Because of this, an amount of the warm
refrigerant gas which is suctioned from an inner space of the
sealed container 101 into the suction muffler 112 can be lessened.
Thus, reduction of the efficiency of the sealed compressor can be
suppressed.
[0067] In the present embodiment, the linear-shaped cut-in portion
117 extends in the axial direction of the communicating passage
114. If the cut-in portion 117 extends in the circumferential
direction of the communicating passage 114, a tensile strength in
the axial direction of the communicating passage 114 is reduced,
and the communicating passage 114 is more likely to be damaged.
However, since the cut-in portion 117 extends in the axial
direction of the communicating passage 114 as described above,
stiffness of the end portion of the communicating passage 114 at
the suction pipe 107 side can be reduced while suppressing
reduction of the tensile strength in the axial direction of the
communicating passage 114.
[0068] Moreover, in the present embodiment, a portion of the cut-in
portion 117 is disposed at a lower end side of the communicating
passage 114. In a case where the refrigerant guided to the
communicating passage 114 through the suction pipe 107 is liquid
refrigerant, or contains plenty of oil 102, as shown in FIG. 5, a
portion of the liquid refrigerant or oil 102 stays in a lower
surface portion of the communicating passage 114, because its
specific gravity is great. However, the liquid refrigerant or oil
102 is discharged through the cut-in portion 117. This makes it
possible to prevent the liquid refrigerant or oil 102 from being
suctioned through the communicating passage 114. As a result, it
becomes possible to prevent reduction of a suction efficiency of
the refrigerant.
[0069] Specifically, the communicating passage 114 is closely
mounted to the sealed container 101, the liquid refrigerant or oil
102 having a great specific gravity stays in the bottom portion of
the communicating passage 114. The liquid refrigerant or oil 102 is
discharged through the cut-in portion 117. As a result, it becomes
possible to provide a sealed compressor which has a high
reliability and a high efficiency.
[0070] Although in the present embodiment, three cut portions 117
are provided at intervals of 120 degrees, at least one cut-in
portion 117 may be provided. For example, two, or four or more
cut-in portions may be provided.
[0071] (Modified example)
[0072] Although in the present embodiment, the communicating
passage 114 includes the cut-in portion 117 extending in the axial
direction of the communicating passage 114 inward from the end
surface at the inner wall surface side of the sealed container 101,
another configuration may be provided so long as a portion of the
cut-in portion 117 is disposed at the lower end side at the
communicating passage 114.
[0073] FIGS. 6A to 6C are views schematically showing external
appearances of communicating passages according to Modified
examples of the present invention. FIG. 6A shows first Modified
example. FIG. 6B shows second Modified example. FIG. 6C shows third
Modified example.
[0074] Specifically, FIG. 6A shows a linear-shaped cut portion.
FIG. 6B shows an example of a hollow portion in which a cut portion
has a hollow shape having an area. FIG. 6C shows another example of
a hollow portion in which a cut portion has a hollow shape having
an area.
[0075] In first Modified example, in a communicating passage 114A,
a cut-in portion 117A extends in the axial direction of the
communicating passage 114A at the suction pipe 107 side. The cut-in
portion 117A may extend in a desired direction.
[0076] In second Modified example, in a communicating passage 114B,
a hollow portion 117B has a semi-circular shape and is provided on
an end surface of the communicating passage 114B at the suction
pipe 107 side. The hollow portion 117B may have a desired
shape.
[0077] In third Modified example, in a communicating passage 114C,
a hollow portion 117C has a circular shape and is provided at the
suction pipe 107 side. The hollow portion 117C may have a desired
shape.
[0078] In another Modified example, any of the cut-in portion 117A,
the hollow portion 117B, and the hollow portion 117C may be
combined suitably. In any case, since it is possible to prevent the
communicating passage 114 from being disengaged and a portion in
the vicinity of the communicating passage 114 from being damaged,
which would be caused by the prying force. As a result, it is
possible to provide a highly reliable sealed compressor.
[0079] The sealed compressor of the present invention is applicable
to sealed compressors for use with air conditioners,
refrigerator-freezer devices, automatic dispensers, heat pump hot
water supply devices, heat pump laundry machines, etc.
[0080] Numeral modifications and alternative embodiments of the
present invention will be apparent to those skilled in the art in
view of the foregoing description. Accordingly, the description is
to be construed as illustrative only, and is provided for the
purpose of teaching those skilled in the art the best mode of
carrying out the invention. The details of the structure and/or
function may be varied substantially without departing from the
spirit of the invention.
* * * * *