JPH0421023Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a hermetic electric compressor used in refrigerators, air conditioners, etc., and particularly relates to a fixing device for a suction muffler that is fixed to the airtight container thereof. .

[Conventional technology]

Figures 4a and 4b are a side view and a partial top view of a conventional hermetic electric compressor disclosed in, for example, Japanese Utility Model Application Publication No. 57-120775. An airtight container 2 houses an electric compression element (not shown) for the air-tight container 1, and a suction muffler 4 is arranged adjacent to the airtight container 1 and connected to the airtight container 1 through a refrigerant suction pipe. refrigerant inlet pipe provided at the top;
Reference numeral 9 denotes a suction muffler fixing device provided between the sealed container 1 and the suction muffler 2. It has a muffler side fixing part 11 fixed to the muffler side fixing part 11, and the muffler side fixing part 11 is formed in a pair and symmetrically so as to sandwich the intake muffler 2.

In the hermetic electric compressor having such a configuration, when the electric compression element inside the hermetic container 1 is operated,
Refrigerant gas flows into the suction muffler 2 from a refrigerant circuit (not shown) connected to the inlet pipe 4, and is further guided to the electric compression element in the closed container 1 through the refrigerant suction pipe 3. The vibrations generated by the operation of the electric compression element at this time are transmitted to the suction muffler through the closed container 1 and the refrigerant suction pipe 3, but since the suction muffler 2 is fixed by the suction muffler fixing device 9, it oscillates. This will not cause damage to the refrigerant suction pipe 3, etc.

[Problem that the invention attempts to solve]

However, in this conventional hermetic electric compressor, the suction muffler fixture 9 serves as a vibration transmission member that transmits vibrations to the suction muffler 2, and the muffler side fixing part 11 is fixed at a symmetrical position with respect to the suction muffler 2. Therefore, this muffler side fixed part 11 becomes the antinode of the resonance mode of the suction muffler 2 and causes resonance of the suction muffler 2, which generates noise and also reduces the vibration of the refrigerant circuit group connected to this suction muffler 2. There was a problem with increasing the amount.

This idea was created to solve the above problems, and aims to prevent the suction muffler from resonating due to the vibrations generated during the operation of the electric compression element, and reduce noise and vibration. .

[Means for solving problems]

The hermetic electric compressor according to this invention has a suction muffler connected to a hermetic container housing an electric compression element via a refrigerant suction pipe, and the suction muffler is connected to a suction muffler located between the suction muffler and the hermetic container. The suction muffler is fixed to the closed container using a fixture, and the suction muffler fixture has a plurality of muffler-side fixing parts that are fixed to the suction muffler and are asymmetrical in a plane with respect to the suction muffler.

[Effect]

In this design, the muffler-side fixed part is formed asymmetrically with respect to the intake muffler, so even if vibration is applied to the intake muffler from this muffler-side fixed part, the muffler-side fixed part Suppresses the resonance of the intake muffler without becoming an antinode of the low-order resonance mode.

〔Example〕

1A and 1B are a side view and a partial top view of a hermetic electric compressor showing an embodiment of this invention, and in the figures, numerals 1 to 4 are similar to the conventional example described above. Reference numeral 5 denotes a suction muffler fixing device provided between the sealed container 1 and the suction muffler 2, and this is a container side fixing part 6 fixed to the circumferential side of the sealed container 1.
and a muffler-side fixing part 7 fixed to the suction muffler 2. Further, the muffler side fixing portion 7 is formed so as to be asymmetrical with respect to the suction muffler 2 when the hermetic electric compressor is viewed from above.

In the hermetic electric compressor configured in this manner, the hermetic container 1 vibrates during operation of the electric compression element, and this vibration is applied to the suction muffler 2 from the muffler side fixing part 7 of the suction muffler fixture 5. FIG. 2 shows the resonance mode when vibration is applied to the suction muffler 2, where 8 indicates the vibration point and K indicates the order. In this invention, the muffler-side fixing part 7 is formed asymmetrically in a plane with respect to the suction muffler 2, so that it can be avoided from becoming an antinode of a low-order resonance mode as shown in FIG. Therefore, resonance in the low-order resonance mode of the intake muffler 2 is suppressed.

In addition, in the above embodiment, the muffler side fixing part 7 is
Although the explanation has been given on the case where the holes are formed in three or more places, as long as they are asymmetrical in the horizontal plane with respect to the suction muffler 2, they may be formed in three or more places. FIG. 3 shows a structure in which muffler side fixing parts 7 are formed at three locations. The angle ratio A:B:C is 1:2:3. In this way, there are three muffler side fixing parts 7.
By forming this, the muffler side fixing part 7 will not act as an antinode of any of the resonance modes shown in FIG. 2, and the resonance of the intake muffler 2 can be suppressed more effectively. It is something that can be done.

[Effect of idea]

As described above, according to this invention, the suction muffler is connected to the airtight container housing the electric compression element via the refrigerant suction pipe, the suction muffler is fixed to the airtight container with the suction muffler fixture, and the suction muffler Since the fixture is formed with a plurality of muffler-side fixing parts that are asymmetrical in plane with respect to the suction muffler, resonance of the suction muffler is suppressed and vibration and noise are reduced.

[Brief explanation of the drawing]

Fig. 1a is a side view of a hermetic electric compressor showing an embodiment of this invention, Fig. 1b is a partial top view thereof,
Fig. 2 is an explanatory diagram showing the resonance mode of the suction muffler, Fig. 3 is a partial top view of a hermetic electric compressor showing another embodiment of this invention, and Fig. 4a is a diagram of a conventional hermetic electric compressor. The side view, FIG. 4b, is a partial top view thereof. In the figure, 1 is a closed container, 2 is a suction muffler, 3 is a refrigerant suction pipe, 5 is a suction muffler fixture,
6 is a container side fixing part, and 7 is a muffler side fixing part. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] an airtight container housing the electric compression element; a suction muffler connected to the airtight container via a refrigerant suction pipe;
a closed-side fixing part located between the suction muffler and the closed container and fixed to the closed container;
A suction muffler fixing device having a muffler-side fixing portion fixed to the suction muffler, and a plurality of muffler-side fixing portions formed asymmetrically in a plane with respect to the suction muffler. Type electric compressor.