JP3130127B2 - Hermetic compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating hermetic compressor used for a refrigerator or the like.

[0002]

2. Description of the Related Art Recent hermetic compressors are strongly desired to have low noise and low vibration in terms of amenities. for that reason,
In order to prevent the noise and vibration caused by the vibration of the mechanical part being transmitted to the closed container and the vibration of the closed container, there is a method of elastically supporting the mechanical part with a spring on the closed container. There is a hermetic compressor as disclosed in JP-A-49-18245.

Hereinafter, an example of the above-mentioned conventional hermetic compressor will be described with reference to the drawings.

FIG. 4 is a sectional view of a conventional hermetic compressor. In the figure, reference numeral 1 denotes a hermetic compressor, and a coil spring 7 is provided in an airtight container 4 comprising an upper shell 2 and a lower shell 3 such that an upper mechanical section 5 and a motor section 6 are located below.
Are elastically supported. The mechanical unit 5 includes a cylinder 9, a piston 10, a crankshaft 11 having a crank eccentric part 11a, a connecting rod 12,
It is composed of a bearing 13 and the like. The motor unit 6 includes a rotor 14 and a stator 15,
The rotor 14 is shrink-fitted and fixed to the crankshaft 11, and the stator 15 is screwed and fixed to the block 8, so that the mechanical unit 5 and the motor unit 6 are integrated to form a compressor unit 16. Further, a spring mounting plate 1 having a stud 17 is provided at a lower end portion of the stator 15.
The compressor unit 16 is supported by inserting the coil spring 7. A discharge pipe 19, a suction pipe 20, and a mount 21 are attached to the closed container 4. Reference numeral 22 denotes a discharge pipe, both ends of which are fixed to the mechanical section 5 and the discharge pipe 19. Reference numeral 23 denotes a rubber grommet, which is inserted into the mount 21 and supports the hermetic compressor 1 on a support plate 24 of a freezing and refrigeration apparatus.

The operation of the hermetic compressor constructed as described above will be described below. When the refrigerant sucked into the closed container 4 through the suction pipe 20 is compressed by the mechanical unit 5, the reciprocation of the piston 10, the connecting rod 12, etc. and the rotation of the crank eccentric part 11 a of the crankshaft 11, and the like, and furthermore, Vibration occurs in the compressor unit 16 due to the compression work of the refrigerant, but the vibration generated by the compressor unit 16 is transmitted to the closed container 4 because the motor unit 6 is elastically supported by the coil spring 7 at the lower end. In this case, the noise is attenuated by the coil spring 7 and the generation of noise caused by the vibration of the closed container 4 is suppressed.

In addition, the exciting force of the vibration by the compressor unit 16 includes the piston 10 and the connecting rod 12.
Reciprocation and crank eccentric part 11a of crankshaft 11
Since the unbalance force of the rotation of the compressor unit 16 is relatively large and the original vibration mode of the compressor unit 16 is restrained by the coil spring 7, the upper part of the mechanical unit 5 vibrates well. Therefore, the vibration is smaller at the lower end of the motor section 6, and the compressor unit 16 is supported at the lower end of the motor section 6 by the coil spring 7.
It is supported at a position where vibration is small, and the mechanical unit 5
Vibration transmitted to the sealed container 4 can be reduced as compared with the case where the vibration is transmitted to the upper part of the closed container 4.

The hermetic compressor 1 has a lower mount 2.
The rubber grommet 2 is attached to the support plate 24 of the freezing and refrigeration equipment at 1.
3, the vibration mode of the sealed container 4 is the same as the vibration mode of the compressor unit 16, and is supported at a position where vibration is small. Therefore, the vibration transmitted to the support plate 24 can be suppressed small, and the generation of noise caused by the vibration of the support plate 24 or the like of the refrigerator can be prevented.

[0008]

However, in the above conventional configuration, the vibration mode of the compressor unit is
In spite of the vibration centering around the center of gravity of the compressor unit, the compressor unit is supported on the lower surface of the stator, so that the vibration mode of the compressor unit does not become the original vibration mode. Therefore, it cannot be said that the vibration of the compressor unit is always reduced at the supporting point depending on the balance form and the design specifications of the mechanical unit. In addition, despite the vibration mode of the hermetic container that is originally centered on the center of gravity of the hermetic compressor, the hermetic compressor is supported by the mount at the bottom of the hermetic container, Depending on the position, balance form, and mechanical part design specifications, the vibration of the closed container is not necessarily reduced at the mount part, which is the supporting point. From the above, the vibration of the compressor unit may be easily transmitted to the closed container via the coil spring, and the vibration of the closed container may be easily transmitted from the mount portion to the support plate of the refrigerator-freezer via the rubber grommet, There is a drawback that noise is generated.

SUMMARY OF THE INVENTION The present invention solves the conventional problems, and reliably reduces the vibration transmitted from a compressor unit to a closed container via a coil spring. Further, the refrigerating and refrigerating device is mounted on a mount portion of the closed container via a rubber grommet. The purpose of the present invention is to reduce the generation of noise due to the vibration of the support plate of the hermetic container and the freezing and refrigeration equipment by reliably reducing the vibration transmitted to the support plate of the compressor, and to produce a low-vibration, low-noise hermetic compressor. And

[0010]

In order to achieve this object, a hermetic compressor according to the present invention comprises a compressor unit including a mechanical part such as a piston, a connecting rod, a crankshaft having a crank eccentric part, and a motor part; A hermetically sealed container for housing the compressor unit, a spring mounting plate mounted on the compressor unit near a plane perpendicular to the crankshaft passing through the center of gravity of the compressor unit, and the hermetically sealed compressor unit with the spring mounting plate. A coil spring supporting the container, a mount attached to the closed container near a plane perpendicular to the crankshaft, passing through the center of gravity of the compressor unit ,
Discharge pipe attached to a closed container near the plane
And the suction attached to the closed container near the plane
And a pipe .

[0011]

According to the hermetic compressor of the present invention, since the vibration of the compressor unit is centered at the center of gravity of the compressor unit, the spring mounted near the plane passing through the center of gravity of the compressor unit and perpendicular to the crankshaft. The vibration at the mounting plate is reduced. Therefore, since the compressor unit is supported by the coil spring at the portion of the spring mounting plate, the vibration of the compressor unit is hardly transmitted to the closed container via the coil spring.
Vibration transmitted to the closed container can be reduced. Further, since the vibration mode of the sealed container is a vibration centered on the center of gravity of the hermetic compressor, the vibration of the mount mounted near a plane passing through the center of gravity of the compressor unit and perpendicular to the crankshaft is reduced. Therefore, the vibration transmitted from the mount to the support plate of the refrigerator-freezer through the rubber grommet can be reduced, and the generation of noise caused by the vibration of the closed container and the support plate of the refrigerator-freezer can be suppressed.

Furthermore, since the discharge pipe and the suction pipe are attached to the closed container near the plane where the vibration of the closed container is small, the vibration transmitted from the closed container to the discharge pipe and the suction pipe can be reduced. It is also possible to prevent generation of noise caused by vibration of the discharge pipe and the suction pipe.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a hermetic compressor according to the present invention will be described below with reference to the drawings. The same components as those of the related art are denoted by the same reference numerals, and detailed description is omitted.

FIGS. 1 and 2 show a first embodiment of a hermetic compressor according to the present invention.
FIG. In FIG. 1 and FIG.
Reference numeral denotes a spring mounting plate fixed to the upper end of the stator 15, which is mounted near a plane perpendicular to the crankshaft 11 through the center of gravity of the compressor unit 16.
Reference numeral 26 denotes a spring support plate fixed to the lower shell 3. The coil spring 7 is interposed between the spring mounting plate 25 and the spring support plate 26 to elastically support the compressor unit 16 on the closed casing 4. Also, mount 27
Is attached to the closed casing 4 near a plane perpendicular to the crankshaft 11 through the center of gravity of the compressor unit 16. Discharge pipe 28 and suction pipe 2
9 is a crankshaft passing through the center of gravity of the compressor unit 16
Attached to the closed container 4 near a plane perpendicular to 11
ing.

The operation of the hermetic compressor constructed as described above will be described below. The crankshaft 11 is rotated by the motor section 6, and the crank eccentric section 11a is eccentrically rotated. Therefore, since the piston 10 connected to the crank eccentric portion 11a via the connecting rod 12 is inserted into the cylinder 9, the piston 10 reciprocates in the cylinder 9 to compress the refrigerant. In this case, when the vibration of the compressor unit 16 has a small restraining force on the compressor unit 16, the vibration mode becomes the original vibration mode around the center of gravity G.
In the present invention, the spring mounting plate 25, which is a support point of the compressor unit 16, is located near a plane passing through the center of gravity of the compressor unit 16 and perpendicular to the crankshaft 11, that is, near a plane where vibration is small. , The compressor unit 16 maintains the original vibration mode centered on the center of gravity G. Further, since the compressor unit 16 is supported by the coil spring 7 on the spring mounting plate 25 near the flat surface where the vibration of the compressor unit 16 is small, the vibration transmitted to the closed casing 4 can be reduced.

When the closed container 4 has a small restraining force, the vibration of the closed container 4 is essentially a vibration mode centered on the center of gravity of the closed compressor 1. Normally, the hermetic container 4 is lighter than the compressor unit 16 and the compressor unit 16 is located substantially at the center of the hermetic container 4, so that the center of gravity of the hermetic compressor 1 is not much different from the center of gravity of the compressor unit 16. In the present invention, since the mount 27, which is the support point of the sealed container 4, is located near a plane passing through the center of gravity of the compressor unit 16 and perpendicular to the crankshaft 11, that is, near a plane where vibration is small. There is no binding force of the vibration mode, and the closed container 4 maintains the original vibration mode centered on the center of gravity G. Further, since the hermetic compressor 1 is supported by the rubber grommet 23 at the position of the mount 27 near the plane where the vibration of the hermetic container 4 is small, the vibration transmitted to the support plate 24 of the refrigerator can be reduced. .

Accordingly, the generation of noise caused by the vibration of the closed container 4 and the support plate 24 of the freezing and refrigeration apparatus can be suppressed, and a hermetic compressor with extremely low vibration and low noise can be obtained. Further, the closed container 4 vibrates during the compression operation.
At this time, the discharge pipe 28 and the suction pipe 29
Perpendicular to the crankshaft 11 through the center of gravity of the unit 16
Because it is attached to the closed container 4 near the plane,
That it is attached to the low vibration part of the container 4.
The discharge pipe 28 and the suction pipe 2
9 can be reduced. Therefore,
Discharge pipe 28, suction pipe 29 and connection to them
Minimize noise generated by pipe vibration
Low vibration and low noise hermetic compressor
You.

As described above, the hermetic compressor of the present embodiment
Piston 10, connecting rod 12, crank eccentric part 11a
A compressor unit 16 including a mechanical unit 5 such as a crankshaft 11 having a motor unit and a motor unit 6, a sealed container 4 that houses the compressor unit 16, and a center that passes through the center of gravity of the compressor unit 16 and is perpendicular to the crankshaft 11. A spring mounting plate 25 attached to the compressor unit 16 in the vicinity of a flat surface; a coil spring 7 for supporting the compressor unit 16 on the closed container 4 with the spring mounting plate 25;
Through the center of gravity, a mount 27 which is attached to the closed container 4 in the vicinity of plane perpendicular to the crankshaft 11,
Discharge pie attached to the closed container near the plane
, And attached to the closed container 4 near the plane.
And the suction pipe 29 is provided with the suction pipe 29, the vibration transmitted to the closed container 4 and the support plate 24 of the freezing and refrigerating device can be reduced, and the closed container 4 and the support plate 24 of the freezing and refrigerating device vibrate. The noise generated by the compressor can be suppressed, and a hermetic compressor with extremely low vibration and low noise can be obtained. Further, the discharge pipe 28 and the suction
Vibration transmitted to the pipe 29 can be reduced,
Outgoing pipe 28, suction pipe 29 and the connection to them
Very low noise generated by vibrating pipes
A low-vibration, low-noise hermetic compressor can be provided.

[0019]

As described above, the present invention relates to a compressor unit including a mechanical portion such as a piston, a connecting rod, a crankshaft having a crank eccentric portion and the like, and a motor portion, a sealed container for accommodating the compressor unit,
A spring mounting plate attached to the compressor unit near a plane perpendicular to the crankshaft, passing through the center of gravity of the compressor unit, a coil spring supporting the compressor unit in the closed container with the spring mounting plate, Through the center of gravity of the compressor unit, a mount attached to the hermetic container near a plane perpendicular to the crankshaft, and to the hermetic container near the plane
Attached discharge pipe and the seal near the plane
Since it is composed of the suction pipe attached to the container, the vibration transmitted to the closed container and the support plate of the refrigerator / freezer can be reduced, and the vibration is generated by the vibration of the support plate of the closed container and the refrigerator / freezer. The generation of noise is suppressed, and a hermetic compressor with extremely low vibration and low noise can be obtained. In addition, discharge pipe and suction pipe
Vibration transmitted to the discharge pipe,
Vibration of the suction pipes and the pipes connected to them
The generation of noise caused by
It can be a hermetic compressor.

[Brief description of the drawings]

FIG. 1 is a front view of a hermetic compressor showing a first embodiment of the present invention.

FIG. 2 is a side sectional view of the hermetic compressor showing the first embodiment of the present invention.

FIG. 3 is a side sectional view of a hermetic compressor showing a second embodiment of the present invention.

FIG. 4 is a side sectional view of a conventional hermetic compressor.

[Explanation of symbols]

 Reference Signs List 4 Closed container 5 Mechanical unit 6 Motor unit 7 Coil spring 10 Piston 11 Crank shaft 11a Crank eccentric part 12 Connecting rod 16 Compressor unit 25 Spring mounting plate 27 Mount 28 Discharge pipe 29 Suction pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F04B 39/00 102 F04B 39/12 101

Claims (1)

(57) [Claims] A compressor unit comprising a mechanical unit having a crankshaft having a piston, a connecting rod, and a crank eccentric part; and a motor unit; a sealed container accommodating the compressor unit; a center of gravity of the compressor unit; A spring mounting plate attached to the compressor unit in the vicinity of a plane perpendicular to the crankshaft, a coil spring supporting the compressor unit in the closed container with the spring mounting plate, and a center of gravity of the compressor unit; A mount attached to said enclosure near a plane perpendicular to the axis ;
A discharge pipe attached to a closed container near the plane,
Suction pie attached to the closed container near the plane
And hermetic compressor.