JPH11324961A - Closed rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To damp the transmission of vibration transmitted from a closed container to an inlet muffler and reduce the noise and vibration by comprising an absorbing means for absorbing the vibration in the operation of a rotary compressor. SOLUTION: A C-shaped muffler holder 4A is mounted between a closed container 1 and an inlet muffler 2, and comprises a container side fixing portion fixed to a side face of the container 1 and an inlet muffler fixing portion 7 fixed to the inlet muffler 2. The ribs 5 are formed on the C-shaped corner portions of the C-shaped muffler holder 4A for absorbing the vibration of the chest 1 in the operation of the compressor. Thereby the rigidity of the muffler holder can be increased without increasing the cost for increasing the plate thickness or the like, the vibration of the piping from the inlet muffler to an unit refrigerant circuit is inhibited, and the noise and vibration are reduced. Further an unit operation range can be widened in accompany therewith, and the capacity of the unit can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic rotary compressor used for an air conditioner, a refrigerator and the like, and more particularly to a muffler holder for fixing a closed container and a suction muffler.

[0002]

2. Description of the Related Art As a conventional hermetic rotary compressor, there is, for example, one disclosed in Japanese Utility Model Laid-Open Publication No. Sho 57-120775. FIG. 4 is a side view, FIG. FIG. 6 is a perspective view of a muffler holder used in a conventional hermetic rotary compressor. In each of the drawings, reference numeral 1 denotes a sealed container containing a compression element (not shown) for compressing and discharging the sucked refrigerant and a motor element (not shown) for driving the compression element. Muffler 4, which is arranged in a closed position and is connected to the closed container 1 by the refrigerant suction pipe 3, is a muffler holder provided between the closed container 1 and the suction muffler 2, and the muffler holder 4 is provided on a side surface of the closed container 1. It has a fixed container side fixing part 6 and a suction muffler side fixing part 7 fixed to the suction muffler 2, and supports the suction muffler 2.

In the hermetic rotary compressor having such a configuration, when the compressor is operated, refrigerant gas flows into a suction muffler 2 from a unit refrigerant circuit (not shown) connected to a suction inlet pipe 8, and further flows into the suction muffler. The refrigerant is guided to the compression element section in the closed vessel 1 via the suction pipe 3, compressed by the compression element section, and discharged from the refrigerant discharge pipe 9 into the unit refrigerant circuit. At this time, the vibration of the compressor generated during operation is transmitted to the suction muffler 2 via the refrigerant suction pipe 3 and the muffler holder 4. This transmission causes the suction muffler 2 to vibrate, causing the piping in the unit refrigerant circuit to vibrate, generating noise and vibration.

[0004]

In a conventional hermetic rotary compressor provided with a muffler holder having such a shape, when the rigidity of the muffler holder is weak, the swing of the suction muffler itself cannot be suppressed, and the unit cannot be rotated. There is a problem that noise and vibration increase by vibrating the refrigerant circuit pipes inside. Further, when the operating frequency of the rotary compressor matches the resonance frequency of the suction muffler, the vibration transmission is amplified, resulting in a larger vibration, which causes a problem of generating noise.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and attenuates the transmission of vibration transmitted from a closed container to a suction muffler during operation of a compressor at low cost without impairing workability. The object of the present invention is to obtain a hermetic rotary compressor that can suppress, reduce noise and vibration, and, when mounted on a variable frequency unit, can widen the operating range of the unit. I do.

[0006]

According to a first aspect of the present invention, there is provided a hermetic rotary compressor including a compressor element and an electric motor element for driving the compressor element, a hermetic container, and a refrigerant suction pipe connected to the hermetic container. A closed type rotary compressor comprising a connected suction muffler and a muffler holder provided between the closed container and the suction muffler, wherein the closed type rotary compressor includes an absorbing means for absorbing vibration during operation of the rotary compressor. It is.

According to a second aspect of the present invention, in the hermetic rotary compressor according to the first aspect of the present invention, the absorbing means forms the muffler holder in a U-shape, and the muffler holder has a U-shape on the container-side fixing portion side. The ribs are provided at the corners of the letter "".

According to a third aspect of the present invention, in the hermetic rotary compressor according to the second aspect of the present invention, the muffler holder is formed from a single plate including the rib.

According to a fourth aspect of the present invention, in the hermetic rotary compressor according to the second aspect of the present invention, the muffler holder has the rib formed as a separate part.

According to a fifth aspect of the present invention, there is provided a hermetic rotary compressor according to any one of the second to fourth aspects, wherein the rib has a shape that can be changed in size. It is.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a side view thereof, FIG. 2 is a partial top view thereof, and FIG. 3 is a perspective view of a muffler holder used in the present embodiment. . 1 to 3, parts corresponding to those in FIGS. 4 to 6 are denoted by the same reference numerals, and detailed description thereof will be omitted. In each figure, 4A is a closed container 1 and a suction muffler 2
And a muffler holder having a predetermined shape, for example, a U-shape provided between the container and the container. The muffler holder includes a container-side fixing portion 6 fixed to the side surface of the closed container 1 and a suction muffler-side fixing portion 7 fixed to the suction muffler 2. Have. Reference numeral 5 denotes a rib formed on the U-shaped corner of the U-shaped muffler holder 4A to absorb the vibration of the sealed container 1 during operation of the compressor. Other configurations are the same as those in FIGS.

In the hermetic rotary compressor constructed as described above, the sealed container 1 vibrates during the operation of the compressor, and this vibration is transmitted to the suction muffler 2 via the muffler holder 4A. Since the ribs 5 are formed at the U-shaped corners, the rigidity is higher than that of the conventional muffler holder, and the vibration transmission to the suction muffler 2 itself is attenuated, and the vibration of the suction muffler 2 itself can be suppressed. In addition,
The method of fixing the suction muffler 2 and the muffler holder 4A may be any method such as welding and band fixing.

As described above, in this embodiment, the ribs are attached to the U-shaped corners of the muffler holder,
It is possible to increase the rigidity of the muffler holder without increasing the cost such as increasing the plate thickness, suppress the vibration of the piping from the suction muffler to the unit refrigerant circuit, and reduce noise and vibration. Along with this, the unit operation range can be widened, and the unit capacity can be improved.

Embodiment 2 FIG. Note that the muffler holder 4A may be provided with the ribs 5 formed from a single plate. As a result, in the present embodiment, a hermetic rotary compressor having low cost and excellent workability can be obtained.

Embodiment 3 Further, the rib 5 described above may be formed as a separate part from the muffler holder 4A. Thereby, in the present embodiment, the rigidity of the muffler holder can be increased.

Embodiment 4 Further, the rib 5 described above may be configured so that the size of the shape can be changed. As a result, in the present embodiment, it is possible to shift the operating frequency of the rotary compressor and the resonance frequency of the suction muffler, so that vibration transmission is attenuated, vibration is reduced, and generation of noise can be prevented.

[0017]

According to the first aspect of the present invention, there is provided an airtight container in which a compressor element and a motor element for driving the compressor element are provided, a suction muffler connected to the airtight container via a refrigerant suction pipe, and a sealed container. And a muffler holder provided between the suction muffler and the suction muffler, the absorption compressor for absorbing vibration during the operation of the rotary compressor is provided, so that the cost such as an increase in plate thickness is not increased. By increasing the rigidity of the muffler holder, the vibration of the piping from the suction muffler to the unit refrigerant circuit can be suppressed, noise and vibration can be reduced, and the operating range of the unit can be widened, thereby improving the unit capacity. There is an effect that it can be achieved.

According to the second aspect of the present invention, since the muffler holder is formed in a U-shape and the rib is provided in the U-shaped corner portion of the muffler holder on the container-side fixing portion side, the plate thickness is increased. There is an effect that the rigidity of the muffler holder can be increased without increasing the cost and the like, the piping vibration from the suction muffler to the unit refrigerant circuit can be suppressed, and noise and vibration can be reduced.

According to the third aspect of the present invention, since the muffler holder is formed from a single plate including the rib, there is an effect that the cost can be reduced and the workability can be improved.

According to the fourth aspect of the present invention, since the muffler holder has the ribs formed as separate parts, there is an effect that the rigidity of the muffler holder can be increased.

According to the fifth aspect of the present invention, since the shape of the rib can be changed, the operating frequency of the rotary compressor can be shifted from the resonance frequency of the suction muffler, and the vibration can be transmitted. Is attenuated, the vibration is reduced, and the generation of noise can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing Embodiment 1 of the present invention.

FIG. 2 is a partial top view showing the first embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of the first embodiment of the present invention.

FIG. 4 is a side view showing a conventional hermetic rotary compressor.

FIG. 5 is a partial top view showing a conventional hermetic rotary compressor.

FIG. 6 is a perspective view showing a muffler holder of a conventional hermetic rotary compressor.

[Explanation of symbols]

1 closed container, 2 suction muffler, 3 refrigerant suction pipe,
4A Muffler holder, 5 rib, 6 Container side fixing part.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Katsumi Endo 2-6-1 Otemachi, Chiyoda-ku, Tokyo Mitsubishi Electric Engineering Co., Ltd.

Claims (5)

[Claims] An airtight container containing a compressor element and an electric motor element for driving the compressor element, a suction muffler connected to the airtight container via a refrigerant suction pipe, and provided between the airtight container and the suction muffler. A sealed rotary compressor comprising: a muffler holder provided with a muffler holder; and a absorbing means for absorbing vibration during operation of the rotary compressor. 2. The absorption means according to claim 1, wherein the muffler holder is formed in a U-shape, and a rib is provided in a U-shaped corner of the muffler holder on the container-side fixing portion side. 2. The hermetic rotary compressor according to 1. 3. The hermetic rotary compressor according to claim 2, wherein the muffler holder is formed from a single plate including the rib. 4. The hermetic rotary compressor according to claim 2, wherein said muffler holder has said rib formed as a separate part. 5. The hermetic rotary compressor according to claim 2, wherein said ribs are formed so that the size of said ribs can be changed.